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53 API jobs in City of London + 20 miles
255 exact matches jobs are outside your preferred location
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Demonstrated technical fluency with cloud-native architectures (e.g., AWS, GCP, Azure), API design, and the infrastructure required to serve and scale LLM-based applications.
Demonstrated technical fluency with cloud-native architectures (e.g., AWS, GCP, Azure), API design, and the infrastructure required to serve and scale LLM-based applications.
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Principal Software Engineer - Unified Client Experience (UCX)
Principal Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
London
£11500 - £90000 per annum + Generous bonus, pension, PMI & more
Deep expertise in React or React Native, with hands-on experience in secure API integration, authentication flows, and frontend architecture.
Deep expertise in React or React Native, with hands-on experience in secure API integration, authentication flows, and frontend architecture.
FEATURED
Software Engineering Manager - Unified Client Experience (UCX)
Software Engineering Manager - Unified Client Experience (UCX)
Hargreaves Lansdown
London
£90000 - £115000 per annum + Generous bonus, pension, PMI and more
Strong understanding of secure API integration, authentication flows, and modern UI/UX architecture.
Strong understanding of secure API integration, authentication flows, and modern UI/UX architecture.
FEATURED
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Strong experience with React (including Hooks, Redux, or Context API) to build dynamic and responsive user interfaces.
Strong experience with React (including Hooks, Redux, or Context API) to build dynamic and responsive user interfaces.
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Strong understanding of web application and cloud firewalls, encryption, identity and API security.
Strong understanding of web application and cloud firewalls, encryption, identity and API security.
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Experience developing a commercial/external software product with external API consumers
Experience developing a commercial/external software product with external API consumers
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Maintain a strong understanding of offensive and defensive practices, with particular focus on web, API, bot, DDoS, and AI-related threats * Strong grasp of common web, cloud, and API protocols and their associated attack surfaces (e.g., HTTP/S, REST, OAuth, DNS, TLS, etc.)
Maintain a strong understanding of offensive and defensive practices, with particular focus on web, API, bot, DDoS, and AI-related threats * Strong grasp of common web, cloud, and API protocols and their associated attack surfaces (e.g., HTTP/S, REST, OAuth, DNS, TLS, etc.)
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The PM will also manage key API integrations with our partners (Lenders and Brokers) to ensure seamless onward journeys via the two-way exchange of data.
The PM will also manage key API integrations with our partners (Lenders and Brokers) to ensure seamless onward journeys via the two-way exchange of data.
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In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
In-depth understanding of data structures, system architecture, API development for microservices frameworks, distributed systems and other backend-related concepts and best practices
AWS for underlying infrastructure (Aurora, Redis, Dynamo, S3, SNS, SQS, CloudFront, API Gateway, etc.)
AWS for underlying infrastructure (Aurora, Redis, Dynamo, S3, SNS, SQS, CloudFront, API Gateway, etc.)
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Senior JavaScript Developer Vue 3
Senior JavaScript Developer Vue 3
Client Server
Arundel Heights, Billericay (CM12), CM12 0EQ
£65000 - £75000 per annum
Senior JavaScript Developer / front End Engineer (Vue 3) Billericay / WFH to £75k - Are you a JavaScript web technologist seeking an opportunity to work with a modern tech stack on Greenfield projects? You could be progressing your career in a senior, hands-on role at an eCommerce payments solutions provider that has experienced great success in the last year and is growing as a result. * Salary (to £75k) * Bonus * 25 days holiday * Pension * Life assurance * Private medical care * Pizza days and other social events * Hybrid working with flexible hours - As a Senior JavaScript Developer you will take ownership of projects within an Agile development environment, with a focus on Vue 3 front end development to help evolve and scale the existing platforms as well as working on new Greenfield projects; you'll be able to take project ownership and manage all aspects of the
Senior JavaScript Developer / front End Engineer (Vue 3) Billericay / WFH to £75k - Are you a JavaScript web technologist seeking an opportunity to work with a modern tech stack on Greenfield projects? You could be progressing your career in a senior, hands-on role at an eCommerce payments solutions provider that has experienced great success in the last year and is growing as a result. * Salary (to £75k) * Bonus * 25 days holiday * Pension * Life assurance * Private medical care * Pizza days and other social events * Hybrid working with flexible hours - As a Senior JavaScript Developer you will take ownership of projects within an Agile development environment, with a focus on Vue 3 front end development to help evolve and scale the existing platforms as well as working on new Greenfield projects; you'll be able to take project ownership and manage all aspects of the
PREMIUM
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Senior Software Developer
Senior Software Developer
Rise Technical
Guildford, Surrey
£55000 - £65000 per annum + Private Healthcare + Pension + Holiday
Guildford/Remote - 1 day a month on-site £55,000 - £65,000 + Remote + Private Medical Insurance + Life Insurance + Other Benefits - This is an excellent opportunity for a Software Engineer with a deep understanding of SIP, VoIP and Python to join a forward-thinking development team where you can further your skills and grow with an award-winning technology business. This company is an established technology partner and managed service provider, specialising in unified communications and cloud contact centre solutions. They help public and private sector organisations modernise their digital infrastructure with a focus on improving customer experience and operational efficiency through system integration and digital transformation. In this varied role you will take a lead in the development of an existing SIP platform.
Guildford/Remote - 1 day a month on-site £55,000 - £65,000 + Remote + Private Medical Insurance + Life Insurance + Other Benefits - This is an excellent opportunity for a Software Engineer with a deep understanding of SIP, VoIP and Python to join a forward-thinking development team where you can further your skills and grow with an award-winning technology business. This company is an established technology partner and managed service provider, specialising in unified communications and cloud contact centre solutions. They help public and private sector organisations modernise their digital infrastructure with a focus on improving customer experience and operational efficiency through system integration and digital transformation. In this varied role you will take a lead in the development of an existing SIP platform.
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Senior Python Developer – Team Lead - Remote
Senior Python Developer – Team Lead - Remote
XACT PLACEMENTS LIMITED
London
From £55,000 to £62,000 per annum
Senior Python Developer Team Lead - Location:Remote (UK-based) Salary:£55,000 £62,000 per annum - Were recruiting on behalf of our client who are in EdTech supporting schools across the UK. The business develops cloud-based solutions that help schools use technology and data to improve outcomes. They are looking for aSenior Python Developerwith Team Lead experience to join their engineering team. Youll lead development, set technical standards and support the delivery of scalable, cloud-native products. Main Duties of the Role * Lead the design and development of scalable Python applications * Provide technical leadership within an Agile environment * Design and maintain AWS-based systems using Infrastructure-as-Code * Set best practices across development, testing and deployment * Mentor developers and contribute to technical innovation - Your Skills and Experience
Senior Python Developer Team Lead - Location:Remote (UK-based) Salary:£55,000 £62,000 per annum - Were recruiting on behalf of our client who are in EdTech supporting schools across the UK. The business develops cloud-based solutions that help schools use technology and data to improve outcomes. They are looking for aSenior Python Developerwith Team Lead experience to join their engineering team. Youll lead development, set technical standards and support the delivery of scalable, cloud-native products. Main Duties of the Role * Lead the design and development of scalable Python applications * Provide technical leadership within an Agile environment * Design and maintain AWS-based systems using Infrastructure-as-Code * Set best practices across development, testing and deployment * Mentor developers and contribute to technical innovation - Your Skills and Experience
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AVEVA is creating software trusted by over 90% of leading industrial companies. Job Description - Job Title: Senior Software Developer - Location: Cambridge, United Kingdom Hybrid (3 days at the office) Employment Type: Full-time regular (flexible working options available) The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformatio
AVEVA is creating software trusted by over 90% of leading industrial companies. Job Description - Job Title: Senior Software Developer - Location: Cambridge, United Kingdom Hybrid (3 days at the office) Employment Type: Full-time regular (flexible working options available) The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformatio
AVEVA is creating software trusted by over 90% of leading industrial companies. Job Title: Senior Software Developer - Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time - The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformation journeys and ensures long-term value for partners and the wider AVEVA ecosystem.
AVEVA is creating software trusted by over 90% of leading industrial companies. Job Title: Senior Software Developer - Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time - The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformation journeys and ensures long-term value for partners and the wider AVEVA ecosystem.
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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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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.
FEATURED
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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 - Customer Delivery Europe is part of the Global Customer Delivery & Care and Europe International Markets organization and plays a critical role ensuring the flawless delivery of Mastercard products and solutions for our customers. We partner with global and regional business units to provide value through our innovation and expertise; whilst deliver
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 - Customer Delivery Europe is part of the Global Customer Delivery & Care and Europe International Markets organization and plays a critical role ensuring the flawless delivery of Mastercard products and solutions for our customers. We partner with global and regional business units to provide value through our innovation and expertise; whilst deliver
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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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Our vision is to give everyone the belief they can make their move. We aim to make moving simpler, by giving everyone the best place to turn to and return to for access to the tools, expertise, trust, and belief to make it happen. Were home to the UKs largest choice of properties and are the go-to destination for millions of people planning their next move, reading the latest industry news, or just browsing whats on the market. We are looking for a Business Analyst (Programmes & Analysis) Location: Milton Keynes (Hybrid) with 2 days a week in the office - Reporting to: Business Architect & Business Analysis Lead - Business Unit: Product Development Programmes & Analysis - The Role - This role is a fantastic opportunity to help define and deliver the future Operating Model for our Customer Operations and Support function, across the people, processes, data and technolo
Our vision is to give everyone the belief they can make their move. We aim to make moving simpler, by giving everyone the best place to turn to and return to for access to the tools, expertise, trust, and belief to make it happen. Were home to the UKs largest choice of properties and are the go-to destination for millions of people planning their next move, reading the latest industry news, or just browsing whats on the market. We are looking for a Business Analyst (Programmes & Analysis) Location: Milton Keynes (Hybrid) with 2 days a week in the office - Reporting to: Business Architect & Business Analysis Lead - Business Unit: Product Development Programmes & Analysis - The Role - This role is a fantastic opportunity to help define and deliver the future Operating Model for our Customer Operations and Support function, across the people, processes, data and technolo
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Our vision is to give everyone the belief they can make their move. We aim to make moving simpler, by giving everyone the best place to turn to and return to for access to the tools, expertise, trust, and belief to make it happen. Were home to the UKs largest choice of properties and are the go-to destination for millions of people planning their next move, reading the latest industry news, or just browsing whats on the market. Role: Principal Native Apps Engineer - Consumer - Apps (Core) Location: Soho Square, London Office / Hybrid - Reporting to: EM Native Apps - The Role - We are on a mission to be 'the app you cant move without'. As the UK's biggest property app and website, our native apps are a critical touchpoint for millions of home movers every month. As Principal Native Apps Engineer you provide expert technical leadership and strategic direction across our
Our vision is to give everyone the belief they can make their move. We aim to make moving simpler, by giving everyone the best place to turn to and return to for access to the tools, expertise, trust, and belief to make it happen. Were home to the UKs largest choice of properties and are the go-to destination for millions of people planning their next move, reading the latest industry news, or just browsing whats on the market. Role: Principal Native Apps Engineer - Consumer - Apps (Core) Location: Soho Square, London Office / Hybrid - Reporting to: EM Native Apps - The Role - We are on a mission to be 'the app you cant move without'. As the UK's biggest property app and website, our native apps are a critical touchpoint for millions of home movers every month. As Principal Native Apps Engineer you provide expert technical leadership and strategic direction across our
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Senior Full Stack Web Developer
Senior Full Stack Web Developer
Hireful
Milton Keynes, Buckinghamshire, MK9
£60k base + Bonus and great benefits
Are you a Senior Web Developer who fancies redefining operational excellence across higher education, conferencing and events? You’ll be joining a company trusted by more than 350 institutions worldwide and backed by 25 years of experience. You’ll be joining a people-first, purpose-driven business where ideas are valued, growth is supported and impact is truly visible. We’re looking for a Senior Web Developer with outstanding front-end expertise and strong full-stack capabilities to help shape the next chapter of our platform. You’ll design and deliver accessible, secure and high-quality web solutions, working closely with clients, project managers and fellow developers. Role: Senior Full Stack Web Developer, Senior Web Developer, Senior Developer, Senior Full Stack Developer, Senior Front End Developer, Full Stack Developer
Are you a Senior Web Developer who fancies redefining operational excellence across higher education, conferencing and events? You’ll be joining a company trusted by more than 350 institutions worldwide and backed by 25 years of experience. You’ll be joining a people-first, purpose-driven business where ideas are valued, growth is supported and impact is truly visible. We’re looking for a Senior Web Developer with outstanding front-end expertise and strong full-stack capabilities to help shape the next chapter of our platform. You’ll design and deliver accessible, secure and high-quality web solutions, working closely with clients, project managers and fellow developers. Role: Senior Full Stack Web Developer, Senior Web Developer, Senior Developer, Senior Full Stack Developer, Senior Front End Developer, Full Stack Developer
NEWFEATURED
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We are looking for a hands-on Technology Consultant to lead the envisioning, architecture, and delivery of Microsoft automation and agentic AI solutions. Youll shape roadmaps with executive stakeholders, design and build Copilot Studio (Full), Power Platform, Dynamics 365, and Azure AI solutions, and drive measurable business impact (adoption, cycle time reduction, presales hours saved, and cost per agent action). Key Responsibilities - Technology Consulting * Lead discovery and envisioning workshops to identify high value AI use cases; define problem statements, success metrics, and ROI (e.g., cycle time reduction, presales hours saved, cost per agent action). * Translate business requirements into solution options and roadmaps; present trade offs clearly to executive and technical stakeholders.
We are looking for a hands-on Technology Consultant to lead the envisioning, architecture, and delivery of Microsoft automation and agentic AI solutions. Youll shape roadmaps with executive stakeholders, design and build Copilot Studio (Full), Power Platform, Dynamics 365, and Azure AI solutions, and drive measurable business impact (adoption, cycle time reduction, presales hours saved, and cost per agent action). Key Responsibilities - Technology Consulting * Lead discovery and envisioning workshops to identify high value AI use cases; define problem statements, success metrics, and ROI (e.g., cycle time reduction, presales hours saved, cost per agent action). * Translate business requirements into solution options and roadmaps; present trade offs clearly to executive and technical stakeholders.
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Why Faculty? We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, weve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here. We dont chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence. Our business, and reputation, is growing fast and were always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology. AI is an epoch-defining technology, join a company where youll be empowered to envision its most powe
Why Faculty? We established Faculty in 2014 because we thought that AI would be the most important technology of our time. Since then, weve worked with over 350 global customers to transform their performance through human-centric AI. You can read about our real-world impact here. We dont chase hype cycles. We innovate, build and deploy responsible AI which moves the needle - and we know a thing or two about doing it well. We bring an unparalleled depth of technical, product and delivery expertise to our clients who span government, finance, retail, energy, life sciences and defence. Our business, and reputation, is growing fast and were always on the lookout for individuals who share our intellectual curiosity and desire to build a positive legacy through technology. AI is an epoch-defining technology, join a company where youll be empowered to envision its most powe
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Role / Job Title:Gen AI Engineer - Work Location:London, United Kingdom (Office) The Role - The Senior GenAI Engineer will develop and deploy advanced Generative AI Products, including fine-tuning V/LLM models and implementing (Graph) RAG (Retrieval-Augmented Generation) solutions. This hands-on role requires deep technical expertise, and as part of the GenAI team, you will implement and optimize GenAI agents for the Global Supply Chain. Why is this job critical? This role ensures the effective use of Generative AI technologies within a Global Supply Chain by designing robust solutions, optimizing performance, and implementing AI governance. The GenAI Engineer is key in delivering efficient, reliable, and secure AI solutions, enhancing operational efficiency and strategic decision-making. Your Responsibilities - Own Technical Implementation of GenAI Capabilities
Role / Job Title:Gen AI Engineer - Work Location:London, United Kingdom (Office) The Role - The Senior GenAI Engineer will develop and deploy advanced Generative AI Products, including fine-tuning V/LLM models and implementing (Graph) RAG (Retrieval-Augmented Generation) solutions. This hands-on role requires deep technical expertise, and as part of the GenAI team, you will implement and optimize GenAI agents for the Global Supply Chain. Why is this job critical? This role ensures the effective use of Generative AI technologies within a Global Supply Chain by designing robust solutions, optimizing performance, and implementing AI governance. The GenAI Engineer is key in delivering efficient, reliable, and secure AI solutions, enhancing operational efficiency and strategic decision-making. Your Responsibilities - Own Technical Implementation of GenAI Capabilities