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        80 Contract API jobs in The City, City of London + 20 miles

        205 exact matches jobs are outside your preferred location

        Backend Engineer

        Randstad Digital
        London
        Negotiable
        Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
        Position: Backend Engineer - Location: Remote (UK) Work Type: Contract - Join our team to build the backbone of a global music streaming platform! We're looking for a JAVA Backend Engineer who loves coding, solving problems, and delivering features that reach millions of users. * Build scalable Java & SpringBoot microservices. * Develop APIs and backend tools for engineers across the company. * Use TDD, CI/CD, Docker, Kubernetes, Jenkins, and GCP services. * Work with alternate languages like Python, Scala, Golang, or Node.js for backend tasks. * Collaborate in an Agile environment with cross-functional teams. * Strong backend development skills (Java and microservices). * Experience with microservices, TDD, CI/CD, Docker & Kubernetes, and cloud platforms (GCP preferred). * Familiarity with and one of Python, Golang, Scala or Node.js is a plus.
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        NEWFEATURED
        Company Description - Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency, and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns, because no ones ever done this before. But now, more than 2,000 clients around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where were going. How we get there is up to us. Join us and help Take Us There. The Role - We are currently seeking an experienced Senior Test Automation Engineer to join our European Regulatory Operations Scrum team. The Senior Test Automation Engineer will have a background in trading or investment banking domain and will be working within the scrum team to design and run automated tests and to help de
        Company Description - Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency, and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There will be twists and turns, because no ones ever done this before. But now, more than 2,000 clients around the world rely on our solutions, and that number is only expected to grow in the years ahead. We know where were going. How we get there is up to us. Join us and help Take Us There. The Role - We are currently seeking an experienced Senior Test Automation Engineer to join our European Regulatory Operations Scrum team. The Senior Test Automation Engineer will have a background in trading or investment banking domain and will be working within the scrum team to design and run automated tests and to help de
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        NEW

        Software Engineer - Embedded Systems

        Huber+Suhner Polatis
        CB4, Cambridge
        Competitive Salary DOE + Excellent Benefits
        Location: Cambridge, Cambridgeshire, CB4 0WN - Salary: Competitive Salary, DOE + Excellent Benefits - Contract: Full time, Permanent - Benefits: Health Shield, Life Assurance - 4x Yearly Salary, Non-Contributory Pension (8%), Cycle to Work Scheme, Opt in to Private Medical, Free Parking, 25 Days Holiday + 8 Bank Holidays + 1 Company Day at Christmas - Are you passionate about embedded systems and eager to work on cutting-edge optical network technology - Join our dynamic Product Software team at Polatis as a Software Engineer, where innovation meets precision! Huber+Suhner produce market-leading optical circuit switches for advanced fibre optic communications networks. The programme management team works across the business to deliver product design, software release, and process improvement projects in the UK and Poland.
        Location: Cambridge, Cambridgeshire, CB4 0WN - Salary: Competitive Salary, DOE + Excellent Benefits - Contract: Full time, Permanent - Benefits: Health Shield, Life Assurance - 4x Yearly Salary, Non-Contributory Pension (8%), Cycle to Work Scheme, Opt in to Private Medical, Free Parking, 25 Days Holiday + 8 Bank Holidays + 1 Company Day at Christmas - Are you passionate about embedded systems and eager to work on cutting-edge optical network technology - Join our dynamic Product Software team at Polatis as a Software Engineer, where innovation meets precision! Huber+Suhner produce market-leading optical circuit switches for advanced fibre optic communications networks. The programme management team works across the business to deliver product design, software release, and process improvement projects in the UK and Poland.
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        NEWFEATURED
        Job Title: Media Operations Technology Lead - Location: London - Type of contract: Full-time, Permanent - With over 200 brands sold in nearly 180 countries, were the worlds leading premium drinks company. Bring your passion and use your curiosity as you explore, collaborate, and innovate to build brands consumers love. Together with passionate people from all over the world, youll test new ideas, learn and grow, and unlock a brighter, more exciting future! Our Marketing team are creators, helping to build and cultivate some of the worlds most loved brands. We craft amazing connections with people around the world to celebrate our brands legacies and reimagine them for the world today, and into the future. Everything we do is underpinned by a deep understanding of our consumers, behaviours, trends, and technologies.
        Job Title: Media Operations Technology Lead - Location: London - Type of contract: Full-time, Permanent - With over 200 brands sold in nearly 180 countries, were the worlds leading premium drinks company. Bring your passion and use your curiosity as you explore, collaborate, and innovate to build brands consumers love. Together with passionate people from all over the world, youll test new ideas, learn and grow, and unlock a brighter, more exciting future! Our Marketing team are creators, helping to build and cultivate some of the worlds most loved brands. We craft amazing connections with people around the world to celebrate our brands legacies and reimagine them for the world today, and into the future. Everything we do is underpinned by a deep understanding of our consumers, behaviours, trends, and technologies.
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        NEW
        We are looking for a dynamic and results-driven App Lead to drive the growth of our App program globally. The role is pivotal in meeting our revenue and efficiency targets, with accountability for performance against App targets globally. What You'll Be Doing * Strategy: Working with the Head of Performance Marketing and team of channel specialists to develop and execute a comprehensive global App strategy to drive growth and achieve ambitious revenue and efficiency targets. * Performance management: Be hands on in our accounts, optimising a complex, high-spending global App program across Google & Apple products. * Industry trends: Stay up to date with the latest trends and innovations in App and digital marketing. Work closely with platform partners to stay on top of emerging products and ensure we have a plan to test them at pace.
        We are looking for a dynamic and results-driven App Lead to drive the growth of our App program globally. The role is pivotal in meeting our revenue and efficiency targets, with accountability for performance against App targets globally. What You'll Be Doing * Strategy: Working with the Head of Performance Marketing and team of channel specialists to develop and execute a comprehensive global App strategy to drive growth and achieve ambitious revenue and efficiency targets. * Performance management: Be hands on in our accounts, optimising a complex, high-spending global App program across Google & Apple products. * Industry trends: Stay up to date with the latest trends and innovations in App and digital marketing. Work closely with platform partners to stay on top of emerging products and ensure we have a plan to test them at pace.
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        NEW
        Location: London (remote applicants considered) Salary: £65-75K + benefits * The Shopify Developer provides daily technical support for global e-commerce operations, maintaining the platform, implementing features, improving performance, and delivering projects in close collaboration with the Senior Digital Manager, E-commerce Delivery Manager, and internal and external teams. * Work closely with the senior digital manager and the E-commerce delivery manager to support the e-commerce and e-commerce related integration daily operations from a technical perspective. * Work closely with the E-commerce delivery manager to work on the business requirements for the e-commerce platform. * Work closely with both internal team and external team on a various range of e-commerce related projects. * Deliver well-structured, well-designed, and well-formatted code, aiming for easy
        Location: London (remote applicants considered) Salary: £65-75K + benefits * The Shopify Developer provides daily technical support for global e-commerce operations, maintaining the platform, implementing features, improving performance, and delivering projects in close collaboration with the Senior Digital Manager, E-commerce Delivery Manager, and internal and external teams. * Work closely with the senior digital manager and the E-commerce delivery manager to support the e-commerce and e-commerce related integration daily operations from a technical perspective. * Work closely with the E-commerce delivery manager to work on the business requirements for the e-commerce platform. * Work closely with both internal team and external team on a various range of e-commerce related projects. * Deliver well-structured, well-designed, and well-formatted code, aiming for easy
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        NEW
        At Cegeka, we are dedicated to delivering high-quality end-to-end services to our clients. We pride ourselves on maintaining excellent customer satisfaction through our innovative solutions and dedicated team. We are seeking a motivated and skilled IT Business Analyst to join ourteam. The main responsibilities of the role will be business analysis, process improvement, solution definition/design and requirement management. * Elicit and document business requirements through close collaboration with stakeholders * Analyse current processes and identify opportunities for improvement * Evaluate impact of changes in relevant legislation, standards, regulation and industry trends * Design solutions which could comprise both system functional changes and/or improvements to business processes, policies or procedures
        At Cegeka, we are dedicated to delivering high-quality end-to-end services to our clients. We pride ourselves on maintaining excellent customer satisfaction through our innovative solutions and dedicated team. We are seeking a motivated and skilled IT Business Analyst to join ourteam. The main responsibilities of the role will be business analysis, process improvement, solution definition/design and requirement management. * Elicit and document business requirements through close collaboration with stakeholders * Analyse current processes and identify opportunities for improvement * Evaluate impact of changes in relevant legislation, standards, regulation and industry trends * Design solutions which could comprise both system functional changes and/or improvements to business processes, policies or procedures
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        NEW
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
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        NEW
        As the Ad Tech and Analytics Manager, you will strategically implement and optimise ad tech solutions, ensuring robust data management and impactful analytics. As a key contributor, you will drive advanced solutions that elevate L'Oréal's digital media performance, ensure robust data governance and compliance, empower data-driven decisions, foster collaboration, and integrate innovative technologies like Generative AI to maintain L'Oréal's leading position in the digital landscape. MEDIA TECH MANAGEMENT & OPTIMISATION * Oversee and optimise APIs (e.g., CAPI, eAPI's) for data collection and integration. * Manage tracking pixels and tags, ensuring data accuracy and reliability across digital platforms. * Manage and utilise essential tools for brand safety, media sustainability, taxonomy, reporting, and analytics, collaborating with media agencies.
        As the Ad Tech and Analytics Manager, you will strategically implement and optimise ad tech solutions, ensuring robust data management and impactful analytics. As a key contributor, you will drive advanced solutions that elevate L'Oréal's digital media performance, ensure robust data governance and compliance, empower data-driven decisions, foster collaboration, and integrate innovative technologies like Generative AI to maintain L'Oréal's leading position in the digital landscape. MEDIA TECH MANAGEMENT & OPTIMISATION * Oversee and optimise APIs (e.g., CAPI, eAPI's) for data collection and integration. * Manage tracking pixels and tags, ensuring data accuracy and reliability across digital platforms. * Manage and utilise essential tools for brand safety, media sustainability, taxonomy, reporting, and analytics, collaborating with media agencies.
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        NEW

        Full Stack .NET Developer

        Ceox Services Ltd
        GU4, Guildford
        Competitive salary dependant on experience
        We are looking for an experienced Full Stack .NET Developer to join our team delivering Agile projects using the latest Microsoft technology for our clients. Our rapidly growing team works mainly with Public Sector organisations to deliver solutions and applications that drive value and engage customers using Power Platform and the Microsoft technology stack. The primary focus of the role would be working with our team to deliver solutions for our customers utilising Microsoft Technologies, with a focus on ASP.NET and Azure. As a Senior Developer, you will be expected to take the Technical Lead role on some projects and work as part of a team on other projects. You will also help design and advocate for internal development standards. We are privately owned with financial stability and a plan for organic growth.
        We are looking for an experienced Full Stack .NET Developer to join our team delivering Agile projects using the latest Microsoft technology for our clients. Our rapidly growing team works mainly with Public Sector organisations to deliver solutions and applications that drive value and engage customers using Power Platform and the Microsoft technology stack. The primary focus of the role would be working with our team to deliver solutions for our customers utilising Microsoft Technologies, with a focus on ASP.NET and Azure. As a Senior Developer, you will be expected to take the Technical Lead role on some projects and work as part of a team on other projects. You will also help design and advocate for internal development standards. We are privately owned with financial stability and a plan for organic growth.
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        NEW

        Database Engineer

        Grundon
        Wallingford, Oxfordshire, OX10 6LX
        up to 40k DOE
        Are you looking for an exciting opportunity where your skills will shine and your ideas will shape the future? At Grundon, we are on the lookout for a dynamic, passionate, and driven individual to join our Data team based in Benson. This is more than just a job; it’s an opportunity to join a company that is here to show the world that there is more to waste than it seems. Here your contributions will make a real difference as we work towards our shared vision to unlock the potential of waste whilst leaving a better planet for future generations. Reporting into the Head of IT/ Finance Director you will play a key role in driving our mission forward managing and optimising the organisation’s data warehouse to ensure high performance, reliability, and accessibility. This role involves designing, developing, and maintaining scalable data solutions that support business ..
        Are you looking for an exciting opportunity where your skills will shine and your ideas will shape the future? At Grundon, we are on the lookout for a dynamic, passionate, and driven individual to join our Data team based in Benson. This is more than just a job; it’s an opportunity to join a company that is here to show the world that there is more to waste than it seems. Here your contributions will make a real difference as we work towards our shared vision to unlock the potential of waste whilst leaving a better planet for future generations. Reporting into the Head of IT/ Finance Director you will play a key role in driving our mission forward managing and optimising the organisation’s data warehouse to ensure high performance, reliability, and accessibility. This role involves designing, developing, and maintaining scalable data solutions that support business ..
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        NEWFEATURED
        Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Overview - We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud. Headquartered in The City of London, we craft bespoke services that help our clien
        Our Purpose - Mastercard powers economies and empowers people in 200+ countries and territories worldwide. Together with our customers, were helping build a sustainable economy where everyone can prosper. We support a wide range of digital payments choices, making transactions secure, simple, smart and accessible. Our technology and innovation, partnerships and networks combine to deliver a unique set of products and services that help people, businesses and governments realize their greatest potential. Title and Summary - Overview - We are looking for a software engineer to join an award winning team with a proven track record of combining data science techniques with an intimate knowledge of payments data to aid Financial Institutions in their fight against money laundering and fraud. Headquartered in The City of London, we craft bespoke services that help our clien
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        NEW
        Job Description - Job Type: Perm - Location: London. Flexible working: All our roles are open to part-time, job-share and other types of flexibility. We will discuss what is important to you and balancing this with business requirements during the recruitment process. You can read more about Phoenix Flex here. Salary and benefits: Up tp £100,000 plus bonus 16% - 32%, private medical cover, 38 days annual leave, excellent pension, 12x salary life assurance, career breaks, income protection, 3x volunteering days and much more - Closing Date: 29th October - Were Phoenix Group, were a long-term savings and retirement business. We offer a range of products across our market-leading brands, Standard Life, SunLife, Phoenix Life and ReAssure. Around 1 in 5 people in the UK has a pension with us. Were a FTSE 100 organisation that is tackling key issues such as transitioning ou
        Job Description - Job Type: Perm - Location: London. Flexible working: All our roles are open to part-time, job-share and other types of flexibility. We will discuss what is important to you and balancing this with business requirements during the recruitment process. You can read more about Phoenix Flex here. Salary and benefits: Up tp £100,000 plus bonus 16% - 32%, private medical cover, 38 days annual leave, excellent pension, 12x salary life assurance, career breaks, income protection, 3x volunteering days and much more - Closing Date: 29th October - Were Phoenix Group, were a long-term savings and retirement business. We offer a range of products across our market-leading brands, Standard Life, SunLife, Phoenix Life and ReAssure. Around 1 in 5 people in the UK has a pension with us. Were a FTSE 100 organisation that is tackling key issues such as transitioning ou
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        NEW

        Salesforce Developer

        Triad Group PLC
        MK1, Milton Keynes
        £55000 - £65000 per annum
        Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices. Salary: Negotiable, DoE, plus company benefits. Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a resident in the UK for a minimum of 5 years and have the right to work in the UK. About Us - Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens, and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale pr
        Based at client locations, working remotely, or based in our Godalming or Milton Keynes offices. Salary: Negotiable, DoE, plus company benefits. Due to the nature of this position, you must be willing and eligible to achieve a minimum of SC clearance. To be eligible, you must have been a resident in the UK for a minimum of 5 years and have the right to work in the UK. About Us - Triad Group Plc is an award-winning digital, data, and solutions consultancy with over 35 years' experience primarily serving the UK public sector and central government. We deliver high-quality solutions that make a real difference to users, citizens, and consumers. At Triad, collaboration thrives, knowledge is shared, and every voice matters. Our close-knit, supportive culture ensures you're valued from day one. Whether working with cutting-edge tech or shaping strategy for national-scale pr
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        NEW
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        About Revolut - People deserve more from their money. More visibility, more control, and more freedom. Since 2015, Revolut has been on a mission to deliver just that. Our powerhouse of products including spending, saving, investing, exchanging, travelling, and more help our 65+ million customers get more from their money every day. As we continue our lightning-fast growth,? 2 things are essential to our success: our people and our culture. In recognition of our outstanding employee experience, we've been certified as a Great Place to Work. So far, we have 10,000+ people working around the world, from our offices and remotely, to help us achieve our mission. And we're looking for more brilliant people. People who love building great products, redefining success, and turning the complexity of a chaotic world into the simplicity of a beautiful solution. About the role
        more
        NEW
        At eBay, we're more than a global ecommerce leader were changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. Were committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work every day. We're in this together, sustaining the future of our customers, our company, and our planet. Join a team of passionate thinkers, innovators, and dreamers and help us connect people and build communities to create economic opportunity for all. We are passionate about connecting buyers and sellers around the world and creating opportunities through commerce and technology.
        At eBay, we're more than a global ecommerce leader were changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. Were committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work every day. We're in this together, sustaining the future of our customers, our company, and our planet. Join a team of passionate thinkers, innovators, and dreamers and help us connect people and build communities to create economic opportunity for all. We are passionate about connecting buyers and sellers around the world and creating opportunities through commerce and technology.
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        NEW
        At eBay, we're more than a global ecommerce leader were changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. Were committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work every day. We're in this together, sustaining the future of our customers, our company, and our planet. Join a team of passionate thinkers, innovators, and dreamers and help us connect people and build communities to create economic opportunity for all. About the role - Every day, millions of users sell and ship their wares using eBay. Our team supports this diverse community by building shipping products around the globe, helping individ
        At eBay, we're more than a global ecommerce leader were changing the way the world shops and sells. Our platform empowers millions of buyers and sellers in more than 190 markets around the world. Were committed to pushing boundaries and leaving our mark as we reinvent the future of ecommerce for enthusiasts. Our customers are our compass, authenticity thrives, bold ideas are welcome, and everyone can bring their unique selves to work every day. We're in this together, sustaining the future of our customers, our company, and our planet. Join a team of passionate thinkers, innovators, and dreamers and help us connect people and build communities to create economic opportunity for all. About the role - Every day, millions of users sell and ship their wares using eBay. Our team supports this diverse community by building shipping products around the globe, helping individ
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        NEW
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. Responsibilities * Design, develop, test, and maintain Java-based applications using the Spring framework. * Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications.
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. Responsibilities * Design, develop, test, and maintain Java-based applications using the Spring framework. * Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications.
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        NEW
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. * Design, develop, test, and maintain Java-based applications using the Spring framework. Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications. * Document technical designs, processes, and solutions.
        We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. * Design, develop, test, and maintain Java-based applications using the Spring framework. Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications. * Document technical designs, processes, and solutions.
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        Happy to look at European relocators - An Edtech Start-up in London are building something transformative in the education space using cutting-edge machine learning. We're looking for aLead ML Engineerto take ownership of the machine learning strategy, build out the team, and help shape the future of AI in education. * Build and lead a new ML team from the ground up. * Define the tech stack for data pipelines and ML models. * Develop generative models using diverse datasets (text, audio, video, test results). * Design and deploy data integration and analysis pipelines. * Collaborate with engineers and product managers to bring ML features to life. * Create innovative language assessments and predictive models. * Optimize models for performance, scalability, and accuracy. * Deep knowledge of neural networks (CNNs, RNNs, LSTMs, Transformers).
        Happy to look at European relocators - An Edtech Start-up in London are building something transformative in the education space using cutting-edge machine learning. We're looking for aLead ML Engineerto take ownership of the machine learning strategy, build out the team, and help shape the future of AI in education. * Build and lead a new ML team from the ground up. * Define the tech stack for data pipelines and ML models. * Develop generative models using diverse datasets (text, audio, video, test results). * Design and deploy data integration and analysis pipelines. * Collaborate with engineers and product managers to bring ML features to life. * Create innovative language assessments and predictive models. * Optimize models for performance, scalability, and accuracy. * Deep knowledge of neural networks (CNNs, RNNs, LSTMs, Transformers).
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        Growth is fuelling Innovation - Be part of the momentum. At Intrum, our rapid growth is creating exciting new opportunities to innovate, expand, and elevate how we serve our clients. As demand for our enterprise solutions accelerates, we're investing in new talent to help us scale smarter and faster. That's why we're hiring a Commercial Product Expert-a pivotal new role designed to strengthen the bridge between our cutting-edge platforms and the commercial teams driving our success. As a Commercial Product Expert, you'll be the vital link between our innovative platforms (Ophelos and Inio amongst other key products) and the commercial teams driving growth. You'll bring deep product knowledge, technical insight, and a consultative mindset to help position our solutions effectively with clients and prospects.
        Growth is fuelling Innovation - Be part of the momentum. At Intrum, our rapid growth is creating exciting new opportunities to innovate, expand, and elevate how we serve our clients. As demand for our enterprise solutions accelerates, we're investing in new talent to help us scale smarter and faster. That's why we're hiring a Commercial Product Expert-a pivotal new role designed to strengthen the bridge between our cutting-edge platforms and the commercial teams driving our success. As a Commercial Product Expert, you'll be the vital link between our innovative platforms (Ophelos and Inio amongst other key products) and the commercial teams driving growth. You'll bring deep product knowledge, technical insight, and a consultative mindset to help position our solutions effectively with clients and prospects.
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        NEWFEATURED
        Date Posted: 07/10/2025 - Location: London - Job Type: Full time - London Hybrid (minimum 50% office based) Who are Just? We help people achieve a better later life. Thats our purpose and its the reason we exist. We are a fast-growing FTSE 250 company helping customers enjoy the retirement they deserve. We do this through a variety of market leading, award-winning products and services, delivered by a diverse team of over 1,400 purpose-led colleagues who genuinely put the customer at the heart of everything we do. This is a brilliant time to join our business. We are on an exciting growth journey to become the UKs most loved retirement expert. About the Role - We are leading a bold and transformative journey - and were looking for a Product Owner to join our flagship technology system transformation programme within our Retail B2B2C business.
        Date Posted: 07/10/2025 - Location: London - Job Type: Full time - London Hybrid (minimum 50% office based) Who are Just? We help people achieve a better later life. Thats our purpose and its the reason we exist. We are a fast-growing FTSE 250 company helping customers enjoy the retirement they deserve. We do this through a variety of market leading, award-winning products and services, delivered by a diverse team of over 1,400 purpose-led colleagues who genuinely put the customer at the heart of everything we do. This is a brilliant time to join our business. We are on an exciting growth journey to become the UKs most loved retirement expert. About the Role - We are leading a bold and transformative journey - and were looking for a Product Owner to join our flagship technology system transformation programme within our Retail B2B2C business.
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        NEW

        Senior Full Stack Engineer

        XACT PLACEMENTS LIMITED
        London
        From £70,000 to £80,000 per annum
        Want to use your full stack skills to help stop real-world cyber attacks? This is your chance to join a fast-growing, VC-backed cybersecurity innovator, recognised by Gartner and trusted by Fortune 500s and critical infrastructure providers worldwide. Theyre building cutting-edge technology that helps organisations continuously understand how they could be compromised and theyre scaling fast. Now, theyre looking for a Senior Full Stack Engineer to join their Client Facing Applications (CFA) team, where youll help shape the customer experience for some of the worlds largest enterprises. * Designing and developing enterprise-grade SaaS features across backend and frontend systems * Building secure, scalable, and high-performing APIs and services (NestJS, GraphQL, REST) * Creating data-driven dashboards and UIs with React, Next.js, and Chakra UI
        Want to use your full stack skills to help stop real-world cyber attacks? This is your chance to join a fast-growing, VC-backed cybersecurity innovator, recognised by Gartner and trusted by Fortune 500s and critical infrastructure providers worldwide. Theyre building cutting-edge technology that helps organisations continuously understand how they could be compromised and theyre scaling fast. Now, theyre looking for a Senior Full Stack Engineer to join their Client Facing Applications (CFA) team, where youll help shape the customer experience for some of the worlds largest enterprises. * Designing and developing enterprise-grade SaaS features across backend and frontend systems * Building secure, scalable, and high-performing APIs and services (NestJS, GraphQL, REST) * Creating data-driven dashboards and UIs with React, Next.js, and Chakra UI
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        NEW
        Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (Global) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? This is your chance to join a research-driven, venture-backed security scale-up thats trusted by some of the worlds biggest enterprises and critical infrastructure providers. Recognised by Gartner, armed with $29M+ in funding, and scaling aggressively worldwide, theyre on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer, youll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions of assetshelping global security teams uncover exposures before attackers do. * Designing and building backend services and data pipelines powering a cutting-edge ...
        Senior Backend Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (Global) Are you ready to build the core systems that power one of the fastest-growing cybersecurity platforms on the planet? This is your chance to join a research-driven, venture-backed security scale-up thats trusted by some of the worlds biggest enterprises and critical infrastructure providers. Recognised by Gartner, armed with $29M+ in funding, and scaling aggressively worldwide, theyre on a mission to reshape how organisations stay ahead of real-world cyber threats. As a Senior Backend Engineer, youll play a key role in building scalable, high-performance backend systems that ingest, process, and serve data on millions of assetshelping global security teams uncover exposures before attackers do. * Designing and building backend services and data pipelines powering a cutting-edge ...
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        NEW

        Senior Technical Business Analyst

        Hays
        London
        £650.0 - £800.0 per annum + £700 - £750/day inside via Umbrella
        Your new company - We are currently partnered exclusively with a financial services institution to appoint a Senior Technical Business Analyst to an initial 6-month contract. Working in the Listed Derivatives area of the business, if you're an experienced technical BA with a strong understanding of US Treasury and interest rate futures/futures as a whole, then we want to hear from you. Contract Length: 6-months + potential extension - Start Date: ASAP - Rate: £700 - £750/day inside via Umbrella - Working Arrangements: Hybrid - Your new role and what you'll need to succeed - Working closely with IT, development, and the operations test team, your role as the Senior Technical BA will act as the bridge between IT and the business, translating business needs into technical requirements and ensuring aligned communication across complex technical projects.
        Your new company - We are currently partnered exclusively with a financial services institution to appoint a Senior Technical Business Analyst to an initial 6-month contract. Working in the Listed Derivatives area of the business, if you're an experienced technical BA with a strong understanding of US Treasury and interest rate futures/futures as a whole, then we want to hear from you. Contract Length: 6-months + potential extension - Start Date: ASAP - Rate: £700 - £750/day inside via Umbrella - Working Arrangements: Hybrid - Your new role and what you'll need to succeed - Working closely with IT, development, and the operations test team, your role as the Senior Technical BA will act as the bridge between IT and the business, translating business needs into technical requirements and ensuring aligned communication across complex technical projects.
        more
        NEW

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        Frequently Asked Questions

        How many contract API jobs are there in The City, City of London?
        There are 80 contract API jobs within 20 miles of The City, City of London available on CWJobs right now.

        Where in The City, City of London are these contract jobs?
        You can find contract jobs in The City, City (EC3), Southwark, The City, City (EC4).

        What other similar jobs are there to contract API jobs in The City, City of London?
        As well as contract API jobs in The City, City of London, you can find contract IT, Software Development, Testing, amongst many others.