23 api developer jobs found

Front-end Developer (8 Month Day Rate Contactor) Contract Type Day Rate Contractor Closing Date 31 August, 2026 Job Category Tech, Data and Digital Business Unit Systems and Infrastructure (UKT) Location London , United Kingdom Posted on 20 August, 2026 The opportunity  As a Front-End Developer you will be responsible for: Build, test and document applications, using an internally developed JavaScript / React based framework and associated utility classes Operate in an Agile/Scrum environment to produce high quality, clean, testable and maintainable code Lead / participate in Show and Tell sessions with Business and Technical Stakeholders Ensure knowledge transfer to the wider Front End / UI Development Team Act as the Front-End SME within the designated delivery team Operates in line with the Bank's Risk Management framework (including sub-frameworks) and relevant risk and compliance policies and procedures,...

Senior Java Developer (6 month contract) Full job description First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward. Counting many of the world's leading investment banks as clients, we help our clients navigate the data-driven, digital revolution that is transforming the financial services sector. Our global teams span across 15 offices serving clients across EMEA, North America and APAC. As an EPAM Systems, Inc. (NYSE: EPAM) company, a leading global provider of digital platform engineering and development services, we deliver advanced financial services solutions by empowering operational insights, driving innovation, and enabling more effective risk management in an increasingly data-centric world. Together with EPAM, we combine deep industry expertise with cutting-edge technology to help clients stay ahead in a rapidly evolving financial landscape, offering...

Network Rail is at the heart of revitalising Britain's railway. From Crossrail - Europe's largest civil engineering project - to investment in world-class stations and major programmes of electrification, we are involved in some of the most ambitious and diverse ventures that this country has ever seen. We at Network Rail are dedicated to becoming one of Britain 's best employers and believe this starts with placing the candidate at the heart of everything we do!   As a  Agentic Automation Engineer , your main responsibilities will be:   We 're looking for an Agentic Automation Engineer to help shape and deliver the next generation of AI-driven automation across the rail industry. This is not a traditional Power Platform Developer role. We 're seeking someone with hands-on experience building AI agents and agentic solutions , primarily within the Microsoft Agentic AI ecosystem , leveraging low-code technologies to design, orchestrate and deploy...

Network Rail is at the heart of revitalising Britain's railway. From Crossrail - Europe's largest civil engineering project - to investment in world-class stations and major programmes of electrification, we are involved in some of the most ambitious and diverse ventures that this country has ever seen. We at Network Rail are dedicated to becoming one of Britain 's best employers and believe this starts with placing the candidate at the heart of everything we do!   As a  Agentic Automation Engineer , your main responsibilities will be:   We 're looking for an Agentic Automation Engineer to help shape and deliver the next generation of AI-driven automation across the rail industry. This is not a traditional Power Platform Developer role. We 're seeking someone with hands-on experience building AI agents and agentic solutions , primarily within the Microsoft Agentic AI ecosystem , leveraging low-code technologies to design, orchestrate and deploy...

Senior Umbraco .NET Developer Location: PSP IT, Spalding, Lincolnshire Employment Type: 6 month contract, possibly leading to permanent Working Pattern: Office-based, Hybrid may be considered for right applicant Department: Development About PSP IT PSP IT is a growing technology business specialising in digital transformation, bespoke software development, enterprise applications and the ongoing support and modernisation of business-critical systems. We work closely with our clients to understand their business challenges and deliver robust, scalable and effective technology solutions. As part of our continued growth, we are looking for an experienced Senior Umbraco Full Stack .NET Developer to join our Development team in Spalding. About the Role We are looking for an accomplished Full Stack .NET Developer with strong commercial experience of Umbraco CMS to take a senior role in the design, development and delivery of modern web applications,...

Senior Java Developer (6 month contract) Full job description First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward. Counting many of the world's leading investment banks as clients, we help our clients navigate the data-driven, digital revolution that is transforming the financial services sector. Our global teams span across 15 offices serving clients across EMEA, North America and APAC. As an EPAM Systems, Inc. (NYSE: EPAM) company, a leading global provider of digital platform engineering and development services, we deliver advanced financial services solutions by empowering operational insights, driving innovation, and enabling more effective risk management in an increasingly data-centric world. Together with EPAM, we combine deep industry expertise with cutting-edge technology to help clients stay ahead in a rapidly evolving financial landscape, offering...

Java Developer (6 month contract) First Derivative is driven by people, data, and technology, unlocking the value of insight, hindsight, and foresight to drive organizations forward. Counting many of the world's leading investment banks as clients, we help our clients navigate the data-driven, digital revolution that is transforming the financial services sector. Our global teams span across 15 offices serving clients across EMEA, North America and APAC. As an EPAM Systems, Inc. (NYSE: EPAM) company, a leading global provider of digital platform engineering and development services, we deliver advanced financial services solutions by empowering operational insights, driving innovation, and enabling more effective risk management in an increasingly data-centric world. Together with EPAM, we combine deep industry expertise with cutting-edge technology to help clients stay ahead in a rapidly evolving financial landscape, offering comprehensive solutions that drive...

Job Introduction The Efficiency and Automation team is a multi-disciplinary team responsible for streamlining business processes, reducing administrative burden and enhancing operational efficiency across the Bank. Through a combination of process automation, intelligent automation, agentic workflows and Generative AI, the team delivers frequent, high-impact improvements that enable colleagues to focus more time on value-adding activities and customer service. As automation technologies continue to evolve, the team is expanding its use of Artificial Intelligence, Agentic Automation and Generative AI capabilities to automate increasingly complex processes, enhance decision-making and improve employee and customer experiences. The Bank's strategy is centred around delivering operational efficiencies that create capacity to support increased business volumes and profitability, while improving customer satisfaction and outcomes. The Efficiency and Automation team supports this...

Location: London 1-2 days a week. Department: Engineering Employment Type: Contract Contract Length: 6 months (with potential for extension) About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious, passionate, driven, and...

Description: The ServiceNow Developer role sits within the ServiceNow / MyDfE team. The platform now supports live ITSM services, HRSD, Employee Centre Pro / MyDfE, CMDB activity, platform upgrades, integrations, reporting, accessibility improvements and wider Enterprise Service Management development.   The team requires an individual with both ITSM and HRSD experience and is needed to support the current backlog, maintain delivery momentum, and ensure that new and existing services are developed in line with agreed platform standards, governance, security and release processes.   Responsibilities: work as part of the ServiceNow / MyDfE product and development team; deliver ServiceNow development across ITSM, HRSD and related platform workstreams; support development in line with agreed policies, processes, standards and roadmap priorities; support service improvements, automation and platform optimisation across DfE service areas;...

What You 'll Be Doing Lead the design and governance of end-to-end Intelligent Automation and Agentic AI solutions. Define scalable, secure and reusable architecture patterns aligned to enterprise architecture principles and technology strategy. Develop architecture standards, reference architectures and integration frameworks for industry-wide adoption. Design low-code and pro-code automation solutions using modern Microsoft and cloud-native technologies. Create reusable architecture capability products, implementation blueprints and technical design standards. Review and assure solution designs, providing architectural governance and technical leadership across delivery teams and partners. Assess emerging technologies and lead proof-of-concepts to support the adoption of innovative automation and AI capabilities. Drive architecture consistency, technical quality and long-term sustainability across the automation portfolio. Coach and mentor architects...

What You 'll Be Doing Lead the design and governance of end-to-end Intelligent Automation and Agentic AI solutions. Define scalable, secure and reusable architecture patterns aligned to enterprise architecture principles and technology strategy. Develop architecture standards, reference architectures and integration frameworks for industry-wide adoption. Design low-code and pro-code automation solutions using modern Microsoft and cloud-native technologies. Create reusable architecture capability products, implementation blueprints and technical design standards. Review and assure solution designs, providing architectural governance and technical leadership across delivery teams and partners. Assess emerging technologies and lead proof-of-concepts to support the adoption of innovative automation and AI capabilities. Drive architecture consistency, technical quality and long-term sustainability across the automation portfolio. Coach and mentor architects...

DevOps and Automation Engineer Contract: Outside IR35 Duration: 6 months   Why Tokio Marine HCC? Standing still is not an option in the current world of Insurance. TMHCC are one of the world’s leading Specialty Insurers. With deep expertise in our chosen lines of business, our unparalleled track record and a solid balance sheet, TMHCC evaluates and manages risk like no one else in the industry. Looking beyond profit, empowering our people and delivering on our commitments are at the core of our customer values, and so is a desire to grow and provide creative and innovative solutions to our clients.   This assignment will be to work with the DevOps and Automation Manager to create and deliver the DevOps and Automation roadmap with a heavy focus on “Everything Ephemeral” including Agentic AI and ephemeral environments.   Key responsibilities and deliverables: Liaise closely with IT Delivery Managers, including...

Location: London 1-2 days a week. Department: Engineering Employment Type: Contract Contract Length: 6 months (with potential for extension) About YLD: Our goal is to help our clients keep moving forward. We work with them to build the skills and capabilities they need to stay ahead of the competition, and we know our success only happens when they succeed. We’re a team of curious, talented people, and we’re committed to making YLD a place where great people want to work, grow, and stay. We’re a remote-first consultancy specialising in software engineering, product design, and data. Our teams are based across London, Lisbon, and Porto, and we create digital solutions that continue to deliver value long after our work is done. About the role: As a Senior Software Engineer at YLD, you’ll be part of a client team building innovative products. We’re looking for someone curious, passionate, driven, and...

Location Victoria, London (Hybrid – 3 days onsite) Contract 6 months initial – Inside IR35 Day Rate £450-£500 per day Role Overview We are seeking a hands-on Microsoft 365 technical lead to drive the organisation's AI enablement, Power Platform adoption and SharePoint transformation within a large enterprise environment. The role will focus on securely enabling Microsoft Copilot, Copilot Studio and AI-powered workflows, while maximizing the value of SharePoint Online, Power Platform and Microsoft 365 as the organisation's core collaboration, automation and information platform. The successful candidate will combine strong technical knowledge with the ability to define and implement AI, automation, content and collaboration strategies across the Microsoft ecosystem. This is a technical leadership role, but the expectation is that the successful candidate will remain hands-on, designing, configuring and implementing solutions across...

Contract Job Title: AI Engineer (Google ADK, LLM, ML, A2A) Contract Start Date: TBC Contract Length: Likely 6 months Contract Classification: Inside IR35 Contract Location: Glasgow (2/3 days in the office) · Design, build, and deploy AI agents using Google’s Agent Development Kit (ADK) and Vertex AI Agent Builder, integrating with APIs and systems. · Develop and orchestrate Agent-to-Agent (A2A) communication flows, enabling collaboration, task delegation, and information sharing among agents. · Implement LLM-based components, prompt templates, function calling, structured outputs using frameworks. · Build and optimize RAG pipelines integrating Vertex AI Search / Matching Engine, vector databases and document stores. · Engineer context and memory modules for agents, defining knowledge retrieval, embedding strategies, and session continuity logic. · Develop API integrations and...

We are seeking a Frontend Developer with experience interacting with internally developed APIs and platforms in a mixed cloud (Azure + AWS) environment for a Government agency. The ideal candidate will work across the full software development lifecycle, from conception to deployment, and collaborate with cross-functional teams to deliver high-quality solutions that meet business objectives. This role requires proficiency in both frontend technologies and UX/UI design principles, strong problem-solving skills, and familiarity with Agile methodologies.   As a  Frontend Developer your main responsibilities will be to: Develop responsive, accessible, and high-quality user interfaces using Next.js, React, and TypeScript. Collaborate with design and product teams to create intuitive user experiences. Develop user experiences backed by internal APIs and search indexes. Participate in code reviews, testing, and debugging to ensure high-quality software....

World Wide Technology (WWT) is a global technology integrator and supply chain solutions provider. Through our culture of innovation, we inspire, build, and deliver business results, from idea to outcome.   World Wide Technology (WWT) is looking for an experienced FullStack Developer with strong expertise in Java, Agile delivery, software architecture, and AI-assisted development.   The ideal candidate combines hands-on engineering, technical leadership, solution design, and modernization of legacy applications while driving automation and innovation across development teams.   This is a contract Role & Inside IR35   FullStack Developer   Contract Duration: 6 months contract   Location: London, United Kingdom (Hybrid with 2- 3 days a week)   Key Responsibilities Drive product strategy, technical roadmap, and solution design using modern technologies and best practices. Lead...

Contract - AI Data Engineer (Azure) Job description Job Title: AI Data Engineer (Azure) Location: London Hybrid. Travel to the London office 2 days a week Duration: 6 months Contract Start Date: ASAP Day rate: Competitive (Inside IR35) Deloitte Working with the Deloitte Associate (Contractor) Programme means we can offer you the opportunity to work on a variation of industry and client related projects. Our aim is to retain the best talent and so when your project end date nears our team of Talent Community Advisors will be working with you to look at alternative projects within the firm that suit your experience should you wish to continue with Deloitte. The Role We are looking for a highly skilled AI Data Engineer (Contractor) specialising in Azure to join our Digital Innovation team, supporting cutting-edge data and analytics use cases across Tax & Legal. This role is ideal for someone who combines strong AI/GenAI data pipeline expertise with hands-on...

World Wide Technology (WWT) is a global technology integrator and supply chain solutions provider. Through our culture of innovation, we inspire, build, and deliver business results, from idea to outcome.   World Wide Technology (WWT) is looking for an experienced FullStack Developer with strong expertise in Java, Agile delivery, software architecture, and AI-assisted development.   The ideal candidate combines hands-on engineering, technical leadership, solution design, and modernization of legacy applications while driving automation and innovation across development teams.   This is a contract Role & Inside IR35   FullStack Developer   Contract Duration: 6 months contract   Location: London, United Kingdom (Hybrid with 2- 3 days a week)   Key Responsibilities Drive product strategy, technical roadmap, and solution design using modern technologies and best practices. Lead...