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95 Contract API jobs in The City, City of London + 20 miles
454 exact matches jobs are outside your preferred location
Location : Head Office, Swiss Cottage, London - Salary : Up to £40,000 (DoE) Reporting To : Head of Operations - Job Type : Full Time - The Company - KSEYE Group is an established bridging finance company specialising in bridging and short-term lending markets. Following the introduction of AI efficiencies and improved operational performance, the company is now seeking to employ a junior/graduate level developer to work closely with the Head of Operations and support the streamlining and process establishment of the Operations team and wider company. As a junior developer for KSEYE, you will be responsible for driving operational excellence by identifying, planning, and executing business process improvements through our systems and bespoke in-house software. You will work closely with cross-functional teams to analyse, design, and implement changes and implement, wh
Location : Head Office, Swiss Cottage, London - Salary : Up to £40,000 (DoE) Reporting To : Head of Operations - Job Type : Full Time - The Company - KSEYE Group is an established bridging finance company specialising in bridging and short-term lending markets. Following the introduction of AI efficiencies and improved operational performance, the company is now seeking to employ a junior/graduate level developer to work closely with the Head of Operations and support the streamlining and process establishment of the Operations team and wider company. As a junior developer for KSEYE, you will be responsible for driving operational excellence by identifying, planning, and executing business process improvements through our systems and bespoke in-house software. You will work closely with cross-functional teams to analyse, design, and implement changes and implement, wh
Company Description - Cell therapies have been shown to cure devastating and previously untreatable diseases like cancer by re-programming the patient's own immune system. Giving more patients access to these life-saving therapies requires a revolution in manufacturing and process automation. Cellular Origins, a TTP Company, is enabling scalable, cost-effective and efficient manufacture of cell and gene therapies. Our technology addresses the challenges associated with manufacturing at scale with an elegant robotic manufacturing automation solution that reduces cost and labour, eliminates human error, and increases efficiency. Job Description - You will design and implement PLC control systems using Beckhoff TwinCAT. You will be responsible for delivering PLC systems that integrate with Cellular Origins' factory software architecture to allow remote control of machine
Company Description - Cell therapies have been shown to cure devastating and previously untreatable diseases like cancer by re-programming the patient's own immune system. Giving more patients access to these life-saving therapies requires a revolution in manufacturing and process automation. Cellular Origins, a TTP Company, is enabling scalable, cost-effective and efficient manufacture of cell and gene therapies. Our technology addresses the challenges associated with manufacturing at scale with an elegant robotic manufacturing automation solution that reduces cost and labour, eliminates human error, and increases efficiency. Job Description - You will design and implement PLC control systems using Beckhoff TwinCAT. You will be responsible for delivering PLC systems that integrate with Cellular Origins' factory software architecture to allow remote control of machine
Oritain is the global leader in product verification, with locations in Auckland, Dunedin, London, Singapore and Washington D.C. Our Mission: Science, Technology, and Global Impact - Our organisation uses cutting-edge forensic science and technology to verify the origin of materials, harnessing science, technology and services to create a community of origin verified buyers and suppliers. Our mission is critical: to protect people and the planet by ensuring the integrity and provenance of materials worldwide. We are seeking a passionate and driven Engineering Manager to lead and empower one of our core software engineering teams. If you thrive on developing engineers, optimising delivery processes, and contributing to a purpose-driven mission, this role offers significant impact. The Opportunity: Empowering Teams, Delivering Impact
Oritain is the global leader in product verification, with locations in Auckland, Dunedin, London, Singapore and Washington D.C. Our Mission: Science, Technology, and Global Impact - Our organisation uses cutting-edge forensic science and technology to verify the origin of materials, harnessing science, technology and services to create a community of origin verified buyers and suppliers. Our mission is critical: to protect people and the planet by ensuring the integrity and provenance of materials worldwide. We are seeking a passionate and driven Engineering Manager to lead and empower one of our core software engineering teams. If you thrive on developing engineers, optimising delivery processes, and contributing to a purpose-driven mission, this role offers significant impact. The Opportunity: Empowering Teams, Delivering Impact
About Moneybox - At Moneybox, our mission is to give everyone the means to get more out of life. We're guided by our belief that wealth isn't about the money, it's about the means to more - more freedom, opportunities, possibilities, and peace of mind. Moneybox is an award-winning wealth management platform, helping over one and a half million people build wealth throughout their lives, whether theyre saving and investing, buying their first home, or planning for retirement. Job Brief - Our backend engineering teams are responsible for defining and delivering our strategic technology roadmap and platform capabilities that support the entire business. With over 1.5 million customers and responsibility for managing £18 billion in assets, we prioritise the resiliency, performance, scalability, and adaptability of our systems to meet both current and future needs.
About Moneybox - At Moneybox, our mission is to give everyone the means to get more out of life. We're guided by our belief that wealth isn't about the money, it's about the means to more - more freedom, opportunities, possibilities, and peace of mind. Moneybox is an award-winning wealth management platform, helping over one and a half million people build wealth throughout their lives, whether theyre saving and investing, buying their first home, or planning for retirement. Job Brief - Our backend engineering teams are responsible for defining and delivering our strategic technology roadmap and platform capabilities that support the entire business. With over 1.5 million customers and responsibility for managing £18 billion in assets, we prioritise the resiliency, performance, scalability, and adaptability of our systems to meet both current and future needs.
We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
We believe in the power of ingenuity to build a positive human future. As strategies, technologies, and innovation collide, we create opportunity from complexity. Our teams of interdisciplinary experts combine innovative thinking and breakthrough technologies to progress further, faster. Our clients adapt and transform, and together we achieve enduring results. We are over 4,000 strategists, innovators, designers, consultants, digital experts, scientists, engineers, and technologists. And we have deep expertise in consumer and manufacturing, defence and security, energy and utilities, financial services, government and public services, health and life sciences, and transport. Our teams operate globally from offices across the UK, Ireland, US, Nordics, and Netherlands. Bringing Ingenuity to Life. Job description - We challenge where it matters and own the outcome.
Python Developer (Full Stack) ClearRoute is an is an engineering consultancy bridging Quality Engineering, Cloud Platforms and Developer Experience. We work with technology leaders facing complex business challenges. We take as much pride in our people, culture and work-life balance as we do in making better software. Were not just making better software. Were making the making of software better. Collaborative, entrepreneurial and dedicated to problem-Solving, we bring the step change our customer need to sustain innovation. Our values challenge us to do the best we can for ClearRoute, our customers and most importantly our team. We want to create a collaborative team to help build ClearRoute. This is an opportunity for you to build the organization from the ground up, use your voice to drive change and help transform organisations and problem domains. Job Role
Python Developer (Full Stack) ClearRoute is an is an engineering consultancy bridging Quality Engineering, Cloud Platforms and Developer Experience. We work with technology leaders facing complex business challenges. We take as much pride in our people, culture and work-life balance as we do in making better software. Were not just making better software. Were making the making of software better. Collaborative, entrepreneurial and dedicated to problem-Solving, we bring the step change our customer need to sustain innovation. Our values challenge us to do the best we can for ClearRoute, our customers and most importantly our team. We want to create a collaborative team to help build ClearRoute. This is an opportunity for you to build the organization from the ground up, use your voice to drive change and help transform organisations and problem domains. Job Role
We're proud to announce we've won Advice firm of the year at the Money Marketing Awards - We're looking for a Senior Data Product Manager to help us shape how data powers decision-making, innovation, and customer experiences across Octopus Money. You'll connect business needs with technical delivery, ensuring our data engineering and data science/AI teams deliver maximum impact. This is an ideal opportunity for someone passionate about using data to solve real business problems, and who thrives at the intersection of strategy, technology, and delivery. About Octopus Money - At Octopus Money, we're on a mission to make money advice accessible to all because the right advice can turn your life dreams into reality. The facts are alarming: half of Brits reach retirement age without enough money to live the life they want, financial stress is a leading cause of poor mental
We're proud to announce we've won Advice firm of the year at the Money Marketing Awards - We're looking for a Senior Data Product Manager to help us shape how data powers decision-making, innovation, and customer experiences across Octopus Money. You'll connect business needs with technical delivery, ensuring our data engineering and data science/AI teams deliver maximum impact. This is an ideal opportunity for someone passionate about using data to solve real business problems, and who thrives at the intersection of strategy, technology, and delivery. About Octopus Money - At Octopus Money, we're on a mission to make money advice accessible to all because the right advice can turn your life dreams into reality. The facts are alarming: half of Brits reach retirement age without enough money to live the life they want, financial stress is a leading cause of poor mental
Landytech is on a mission to revolutionize the way that investment managers, asset owners and their advisors access asset information. Powered by Sesame, an industry-leading investment reporting platform, we are helping clients in over 15 countries make informed investment decisions and deliver insights faster. The company is growing rapidly and it's an exciting time to join, having secured $12M in Series B funding in January 2023. In just four years, it has gone from two co-founders to a team of 100+ staff, with offices in London and Paris. At Landytech, we see diversity as our strength with a team from over 15 countries and 14 languages spoken. Team & Role - We're seeking a talented Software Engineer to join our team. You'll build and maintain services and tools (written primarily in Python) that process and publish financial metrics, directly impacting how our cust
Landytech is on a mission to revolutionize the way that investment managers, asset owners and their advisors access asset information. Powered by Sesame, an industry-leading investment reporting platform, we are helping clients in over 15 countries make informed investment decisions and deliver insights faster. The company is growing rapidly and it's an exciting time to join, having secured $12M in Series B funding in January 2023. In just four years, it has gone from two co-founders to a team of 100+ staff, with offices in London and Paris. At Landytech, we see diversity as our strength with a team from over 15 countries and 14 languages spoken. Team & Role - We're seeking a talented Software Engineer to join our team. You'll build and maintain services and tools (written primarily in Python) that process and publish financial metrics, directly impacting how our cust
Rayo, part of the UBDS group, is seeking a Full-Stack Developer to contribute to the development and support of cloud-native applications deployed on Amazon Web Services (AWS). The successful candidate will work across the full software development lifecycle, combining solid Java/Spring Boot back-end development with modern front-end skills using frameworks such as React or Angular. The role offers opportunities to support, design, and build scalable and secure solutions for high-impact public sector programmes. This position is suitable for candidates with foundational experience in full-stack development, as well as those with deeper technical capability looking to further progress within an Agile delivery environment. * Design, develop, and maintain scalable full-stack solutions hosted on AWS. * Build and integrate RESTful APIs using Java and Spring Boot.
Rayo, part of the UBDS group, is seeking a Full-Stack Developer to contribute to the development and support of cloud-native applications deployed on Amazon Web Services (AWS). The successful candidate will work across the full software development lifecycle, combining solid Java/Spring Boot back-end development with modern front-end skills using frameworks such as React or Angular. The role offers opportunities to support, design, and build scalable and secure solutions for high-impact public sector programmes. This position is suitable for candidates with foundational experience in full-stack development, as well as those with deeper technical capability looking to further progress within an Agile delivery environment. * Design, develop, and maintain scalable full-stack solutions hosted on AWS. * Build and integrate RESTful APIs using Java and Spring Boot.
Experience with API design and implementing authentication/authorisation flows
Experience with API design and implementing authentication/authorisation flows
Familiarity with real-time data processing, event-driven systems, and API-first design.
Familiarity with real-time data processing, event-driven systems, and API-first design.
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Familiarity with API testing tools (e.g., Postman, RestAssured).
Familiarity with API testing tools (e.g., Postman, RestAssured).
The architect will lead strategic initiatives including Azure Landing Zones, cloud migrations, Kubernetes-based microservices, SD-WAN/SASE integration, API architecture, and Infrastructure-as-Code (IaC) using Terraform, while working closely with the Head of Strategy, Architecture & Platform Engineering. API Integration & Design * Design and govern enterprise API architecture for cloud-native and hybrid applications * Define standards for API security, versioning, throttling, and lifecycle management * API Design & Management (e.g., Apigee, Azure API Management)
The architect will lead strategic initiatives including Azure Landing Zones, cloud migrations, Kubernetes-based microservices, SD-WAN/SASE integration, API architecture, and Infrastructure-as-Code (IaC) using Terraform, while working closely with the Head of Strategy, Architecture & Platform Engineering. API Integration & Design * Design and govern enterprise API architecture for cloud-native and hybrid applications * Define standards for API security, versioning, throttling, and lifecycle management * API Design & Management (e.g., Apigee, Azure API Management)
Experience and knowledge of API testing and the use of Postman
Experience and knowledge of API testing and the use of Postman
Azure API Management (APIM)
Azure API Management (APIM)
Select, implement, and optimise testing tools and environments across functional, API, and performance testing.
Select, implement, and optimise testing tools and environments across functional, API, and performance testing.
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The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API.
The OpenPayd platform delivers a suite of banking and payments infrastructure: accounts in over 40 currencies, FX, on/off ramp, international and domestic payments, Open Banking services all via a single API.
Understanding of Workfront Fusion or API-driven workflows (handled by a dedicated integration team).
Understanding of Workfront Fusion or API-driven workflows (handled by a dedicated integration team).
We believe in good RESTful API design for communication between our services and their various parts, and also for exchanging data and functionality with external services.
We believe in good RESTful API design for communication between our services and their various parts, and also for exchanging data and functionality with external services.
We are building the first European Investment API that empowers businesses to offer seamless investment. Our Marketing team ensures Upvests Investment API is widely recognised as the best on the market. * 5+ years of product marketing experience in B2B SaaS, ideally within fintech, investments, or API-driven infrastructure.
We are building the first European Investment API that empowers businesses to offer seamless investment. Our Marketing team ensures Upvests Investment API is widely recognised as the best on the market. * 5+ years of product marketing experience in B2B SaaS, ideally within fintech, investments, or API-driven infrastructure.
Familiarity with API design and working in distributed systems
Familiarity with API design and working in distributed systems
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Experience designing, building and deploying user-facing, and/or API-based products. Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.
Experience designing, building and deploying user-facing, and/or API-based products. Our API-first platform provides fully automated validators, staking & DeFi protocols access, and comprehensive data and commission management.
Strong API development and database experience (Postgres/Oracle + SQL).
Strong API development and database experience (Postgres/Oracle + SQL).
Backend: AWS serverless Lambda, API Gateway, DynamoDB, and S3
Backend: AWS serverless Lambda, API Gateway, DynamoDB, and S3