Date posted
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Locations
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38 API jobs in Hertfordshire + 20 miles
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A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. * Axway's core products: Policy Studio, API Gateway, and API Manager. If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you.
A top-tier defense organization is looking for an experienced Axway API Developer / Administrator to join their team on a 6-month contract. * Axway's core products: Policy Studio, API Gateway, and API Manager. If you are an experienced professional with a background in API, MFT, or secure file transfers, this could be the perfect opportunity for you.
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Staff Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k
Staff Software Engineer / Developer (Java Kotlin AWS API) Hybrid WFH to £110k
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Integration Architect
Integration Architect
Lynx Recruitment Limited
SW1W, South West London
From £85,000 to £100,000 per annum
Create high-level architectural assets, including API catalogues, application and connectivity models, guiding detailed design - Solid understanding of SOA, REST, and API management principles - Proficient with XSD, XML, XSLT, JSON, API
Create high-level architectural assets, including API catalogues, application and connectivity models, guiding detailed design - Solid understanding of SOA, REST, and API management principles - Proficient with XSD, XML, XSLT, JSON, API
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Champion best practices across testing disciplines including unit, integration, UI, API, and performance * Knowledge of web, mobile, API/microservices testing and contract testing (e.g. PACT)
Champion best practices across testing disciplines including unit, integration, UI, API, and performance * Knowledge of web, mobile, API/microservices testing and contract testing (e.g. PACT)
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Lead Java SDET
Lead Java SDET
Deerfoot Recruitment Solutions
The City, EC4N 6JD
£90000 - £120000 per annum + Benefits + Bonus + Hybrid Working
Lead SDET | SDET | Software Development Engineer in Test | Test Manager | Test Lead | Lead Test Engineer | Principal Test Engineer | QA Lead | Quality Assurance Lead | Software Test Lead | Automation Lead | Java | Unit Testing | Contract Testing | REST | API | Java OOP | API Testing | Cucumber | Selenium WebDriver | JSON | Performance Testing | Leadership
Lead SDET | SDET | Software Development Engineer in Test | Test Manager | Test Lead | Lead Test Engineer | Principal Test Engineer | QA Lead | Quality Assurance Lead | Software Test Lead | Automation Lead | Java | Unit Testing | Contract Testing | REST | API | Java OOP | API Testing | Cucumber | Selenium WebDriver | JSON | Performance Testing | Leadership
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Build and maintain an API used by the product as well as external partners.
Build and maintain an API used by the product as well as external partners.
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Senior/Lead Full Stack Developer (React / Python) AI Start up!
Senior/Lead Full Stack Developer (React / Python) AI Start up!
Robert Half
EC1, City of London
Negotiable
API & database experience
API & database experience
Perform Dataverse customizations, SQL queries, and CRUD operations using REST/Web API calls. * JavaScript (customizations & API calls)
Perform Dataverse customizations, SQL queries, and CRUD operations using REST/Web API calls. * JavaScript (customizations & API calls)
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Senior Node.js Developer
Senior Node.js Developer
ARC IT Recruitment Ltd
SW1V, South West London, SW1W 9SJ
Up to £100,000 per annum
Build and implement new API systems integrating with ferry operators, third-party service providers, and more.
Build and implement new API systems integrating with ferry operators, third-party service providers, and more.
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Azure Administrator
Azure Administrator
Queen Square Recruitment Limited
EC2N, City of London
From £450 to £550 per day inside IR35, DOE
Configure cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
Configure cloud-native applications using Azure Cosmos DB (SQL API, Mongo API)
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Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
Proficiency in at least one major API testing framework - Experience withAzure (APIM, Azure Functions, API Services), React/React-Native and.NET Core
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Azure Developer
Azure Developer
Queen Square Recruitment Limited
EC2N, City of London
From £500 to £600 per day inside IR35, DOE
Develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API) * Experience with SQL API and familiarity with other APIs
Develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API) * Experience with SQL API and familiarity with other APIs
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Strong foundation in web development, REST API design, and secure best practices
Strong foundation in web development, REST API design, and secure best practices
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Global Claims IT Leader
Global Claims IT Leader
MARSH CORPORATE SERVICES LIMITED
The City, EC3R 5BU
Pension Scheme, Private Health Insurance & life insurance
Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
Being a cross-functional collaborator interfacing with MMC Enterprise Technology partners, Marsh-Operations, and Transformation Office will come naturally to you building a new set of reusable IT Microservices connected via a well-defined API structure.
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Contract: Full-Time, Permanent - Location: Maidenhead, Berkshire (Hybrid flexible, 3 days office) Salary: Up to £110,000 per annum - At Dignity and Farewill, we're redefining what end-of-life services can look and feel like - modern, compassionate, accessible. As we combine the scale and experience of Dignity with Farewill's tech-driven innovation, we're building a next-generation platform to support families at one of life's most important moments. We're looking for a Software Engineering Lead to join our growing technology team and help drive this transformation. This is a hands-on technical leadership role, responsible for guiding one of our key product domains - whether that's Funeral Plans, Legal Services, or At-Need Funerals - from strategy through to scalable, secure software delivery. What you'll be doing
Contract: Full-Time, Permanent - Location: Maidenhead, Berkshire (Hybrid flexible, 3 days office) Salary: Up to £110,000 per annum - At Dignity and Farewill, we're redefining what end-of-life services can look and feel like - modern, compassionate, accessible. As we combine the scale and experience of Dignity with Farewill's tech-driven innovation, we're building a next-generation platform to support families at one of life's most important moments. We're looking for a Software Engineering Lead to join our growing technology team and help drive this transformation. This is a hands-on technical leadership role, responsible for guiding one of our key product domains - whether that's Funeral Plans, Legal Services, or At-Need Funerals - from strategy through to scalable, secure software delivery. What you'll be doing
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Full Stack Engineer, GraphQL APIs, TypeScript, Node
Full Stack Engineer, GraphQL APIs, TypeScript, Node
Staffworx Limited
Brentford End, TW7
market rates, outside IR35, 6 months initial, 2 days week on site
Full Stack Software Engineer GraphQL | TypeScript | Cloud-Native - Based West London, Hybrid working, 1-2 days week on site. Outside IR35. 6 months initial, likely extensions. Were looking for aFull Stack Software Engineerwho loves building high-quality, scalable systems and isn't afraid to get deep into both the code and the infrastructure. If GraphQL APIs, TypeScript/Node.js backends and cloud-native deployments make you feel right at home, this is your stage. What you ll be doing * Design & buildrobust, scalableTypeScript/Node.jsservices andGraphQL APIsthat power real-world applications. * Write code that lastsclean, maintainable, well-tested, and resilient. * Shape our infrastructurethrough modern DevOps practices: CI/CD pipelines (Jenkins, Concourse), containerisation, Helm, and Kubernetes deployments.
Full Stack Software Engineer GraphQL | TypeScript | Cloud-Native - Based West London, Hybrid working, 1-2 days week on site. Outside IR35. 6 months initial, likely extensions. Were looking for aFull Stack Software Engineerwho loves building high-quality, scalable systems and isn't afraid to get deep into both the code and the infrastructure. If GraphQL APIs, TypeScript/Node.js backends and cloud-native deployments make you feel right at home, this is your stage. What you ll be doing * Design & buildrobust, scalableTypeScript/Node.jsservices andGraphQL APIsthat power real-world applications. * Write code that lastsclean, maintainable, well-tested, and resilient. * Shape our infrastructurethrough modern DevOps practices: CI/CD pipelines (Jenkins, Concourse), containerisation, Helm, and Kubernetes deployments.
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Java Quantitative Developer Low Latency
Java Quantitative Developer Low Latency
James Joseph Associates Limited
EC2N, City of London
From £150,000 to £175,000 per annum Circa 50-100% Bonus + Pension + Be
Our client is a leading and well-established player in the Digital Asset and Cryptocurrency Quantitative/Algorithmic trading industry. The business is going from strength to strength, they are currently going through a period of exponential growth and are enjoying record profits The business is actively expanding as there is additional headcount for a number trade platform specialist Java Development with a focus on either/or Quantitative Development or low-latency performance optimization. You will be working on greenfield projects to build out and enhance their low latency trading systems. Working in a fast-paced trading environment as a Quant Developer, where you will collaborate closely with expert traders, quantitative analysts, and engineering specialists to craft and fine-tune trading strategies across both spot and derivative markets.
Our client is a leading and well-established player in the Digital Asset and Cryptocurrency Quantitative/Algorithmic trading industry. The business is going from strength to strength, they are currently going through a period of exponential growth and are enjoying record profits The business is actively expanding as there is additional headcount for a number trade platform specialist Java Development with a focus on either/or Quantitative Development or low-latency performance optimization. You will be working on greenfield projects to build out and enhance their low latency trading systems. Working in a fast-paced trading environment as a Quant Developer, where you will collaborate closely with expert traders, quantitative analysts, and engineering specialists to craft and fine-tune trading strategies across both spot and derivative markets.
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Senior Software Engineer Full Stack JavaScript
Senior Software Engineer Full Stack JavaScript
Client Server
W6, West London
£85000 - £100000 per annum
Senior Software Engineer / Developer (Full Stack JavaScript) London to £100k - Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Software Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business. You'll work across the full tech stack using JavaScript and Vue.js on the front end, there's a range of other tech in the stack (TypeScrip
Senior Software Engineer / Developer (Full Stack JavaScript) London to £100k - Opportunity to progress your career in a senior, hands-on Software Engineer role at a scale-up tech company, that enables smart matching for commercial van drivers and consumers, via job bidding and route optimisation, streamlining processes and delivering CO2 carbon neutral targets, the company has been established 10 years, with recent funding of £125 million. You'll be working on complex and interesting systems and can enjoy a range of benefits and perks. As a Senior Software Engineer you'll collaborate as part of an Agile technology team to design and develop, troubleshoot and solve complex software issues to help scale and future proof the business. You'll work across the full tech stack using JavaScript and Vue.js on the front end, there's a range of other tech in the stack (TypeScrip
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Espire Infolabs is hiring for MS Power Platform Engineer for London, UK location. Job Title: MS Power Platform Engineer - Job Type: Permanent - Job Location: London (3 Days/week onsite) We are seeking a skilled Power Platform Engineer with deep insurance industry expertise to design, develop, and implement automation solutions using Microsoft Power Platform technologies. The successful candidate will serve as a technical expert in Power Automate and broader Power Platform capabilities while effectively managing stakeholder relationships and driving digital transformation initiatives within the insurance and re-insurance domain. Key Responsibilities - Technical Development * Design and develop complex automation workflows using Power Automate (formerly Microsoft Flow) * Build custom applications using Power Apps to meet specific business requirements
Espire Infolabs is hiring for MS Power Platform Engineer for London, UK location. Job Title: MS Power Platform Engineer - Job Type: Permanent - Job Location: London (3 Days/week onsite) We are seeking a skilled Power Platform Engineer with deep insurance industry expertise to design, develop, and implement automation solutions using Microsoft Power Platform technologies. The successful candidate will serve as a technical expert in Power Automate and broader Power Platform capabilities while effectively managing stakeholder relationships and driving digital transformation initiatives within the insurance and re-insurance domain. Key Responsibilities - Technical Development * Design and develop complex automation workflows using Power Automate (formerly Microsoft Flow) * Build custom applications using Power Apps to meet specific business requirements
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BACS Payments Business Analyst
BACS Payments Business Analyst
Robert Walters Direct Sourcing EMEA
Millwall, E14 5JP
Market Rates - PAYE
We are seeking a BACS Payments Business Analyst to join JP Morgan in London on an initial 9 months contract to help with the development of a new internal payments platform. Description - As a Business Analyst at JPMorgan Chase within the Payments technology team, you are the heart of this venture, focused on getting smart ideas into the hands of our customers. You have a curious mindset, thrive in collaborative squads, and are passionate about new technology. By your nature, you are also solution-oriented, commercially savvy and have a head for fintech. You thrive in working in tribes and squads that focus on specific products and projects - and depending on your strengths and interests, you'll have the opportunity to move between them. * Act as the primary subject matter expert on payment schemes, leading integration efforts and ensuring seamless connections
We are seeking a BACS Payments Business Analyst to join JP Morgan in London on an initial 9 months contract to help with the development of a new internal payments platform. Description - As a Business Analyst at JPMorgan Chase within the Payments technology team, you are the heart of this venture, focused on getting smart ideas into the hands of our customers. You have a curious mindset, thrive in collaborative squads, and are passionate about new technology. By your nature, you are also solution-oriented, commercially savvy and have a head for fintech. You thrive in working in tribes and squads that focus on specific products and projects - and depending on your strengths and interests, you'll have the opportunity to move between them. * Act as the primary subject matter expert on payment schemes, leading integration efforts and ensuring seamless connections
NEWPREMIUM
SEPA payments Business Analyst
SEPA payments Business Analyst
Robert Walters Direct Sourcing EMEA
Millwall, E14 5JP
Market Rates - PAYE
We are seeking a SEPA Payments Business Analyst to join JP Morgan in London on an initial 9 months contract to help with the development of a new internal payments platform. Description - As a Business Analyst at JPMorgan Chase within the Payments technology team, you are the heart of this venture, focused on getting smart ideas into the hands of our customers. You have a curious mindset, thrive in collaborative squads, and are passionate about new technology. By your nature, you are also solution-oriented, commercially savvy and have a head for fintech. You thrive in working in tribes and squads that focus on specific products and projects - and depending on your strengths and interests, you'll have the opportunity to move between them. * Act as the primary subject matter expert on payment schemes, leading integration efforts and ensuring seamless connections
We are seeking a SEPA Payments Business Analyst to join JP Morgan in London on an initial 9 months contract to help with the development of a new internal payments platform. Description - As a Business Analyst at JPMorgan Chase within the Payments technology team, you are the heart of this venture, focused on getting smart ideas into the hands of our customers. You have a curious mindset, thrive in collaborative squads, and are passionate about new technology. By your nature, you are also solution-oriented, commercially savvy and have a head for fintech. You thrive in working in tribes and squads that focus on specific products and projects - and depending on your strengths and interests, you'll have the opportunity to move between them. * Act as the primary subject matter expert on payment schemes, leading integration efforts and ensuring seamless connections
NEWPREMIUM
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Please note that relevant training, guidance, and advice will be given. This document lists the responsibilities you will encompass in your daily role. Company purpose statement: To use the best technology to better connect people. Company Profile - We are an award-winning technology services company based in Bedford. Established in 2006, we have an outstanding growth record, fantastic clients, and an excellent working environment. Committed to delivering high-touch Technology services to the property sector, specifically skyscrapers, our aim is to provide the highest levels of service coupled with a great working environment. Were hiring an experienced Smart Systems Manager to lead the delivery, integration, and optimisation of smart technologies across multiple client properties. You will act as the central point of contact for all things smartfrom IoT sensors and a
Please note that relevant training, guidance, and advice will be given. This document lists the responsibilities you will encompass in your daily role. Company purpose statement: To use the best technology to better connect people. Company Profile - We are an award-winning technology services company based in Bedford. Established in 2006, we have an outstanding growth record, fantastic clients, and an excellent working environment. Committed to delivering high-touch Technology services to the property sector, specifically skyscrapers, our aim is to provide the highest levels of service coupled with a great working environment. Were hiring an experienced Smart Systems Manager to lead the delivery, integration, and optimisation of smart technologies across multiple client properties. You will act as the central point of contact for all things smartfrom IoT sensors and a
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C# Engineer (Blazor Experience)
C# Engineer (Blazor Experience)
Hays
MK1, Milton Keynes
£350.0 - £400.0 per day + £350 - 400 per day Outside IR35
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
Role OverviewOur client based in Milton Keynes is looking for a passionate and skilled C# Engineer with proven experience in Blazor to join their growing development team. This is a fantastic opportunity to work on high-performance web applications in a collaborative and innovative environment. You'll be working closely with a talented team of developers, designers, and product managers to deliver cutting-edge solutions that drive real value. Responsibilities * Build and maintain interactive, scalable web applications using Blazor and .NET technologies. * Collaborate with cross-functional teams to define, design, and implement new features. * Ensure code quality through code reviews, unit testing, and adherence to best practices. * Troubleshoot and resolve issues across the full stack. * Contribute to technical discussions and share knowledge with the wider team.
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As we expand our Data & AI practice, we are seeking a Data / Solution Architect to play a key role in designing and delivering cutting-edge AI proof of concepts, MVPs, and next-generation Digital Assistant platforms for our clients. The Role - This is a hands-on architecture and design role where you will bridge business vision with technical delivery. You will shape solutions from the ground up, from concept and discovery through to scalable MVPs, ensuring that architecture, data, and AI capabilities are robust, secure, and enterprise-ready. You’ll be working closely with client stakeholders, product managers, engineers, and data scientists to deliver AI-powered digital assistants and productivity solutions that drive measurable outcomes. What You’ll Do * Architect solutions for AI-powered proof of concepts and MVPs, with a focus on Digital Assistants and intelligent
As we expand our Data & AI practice, we are seeking a Data / Solution Architect to play a key role in designing and delivering cutting-edge AI proof of concepts, MVPs, and next-generation Digital Assistant platforms for our clients. The Role - This is a hands-on architecture and design role where you will bridge business vision with technical delivery. You will shape solutions from the ground up, from concept and discovery through to scalable MVPs, ensuring that architecture, data, and AI capabilities are robust, secure, and enterprise-ready. You’ll be working closely with client stakeholders, product managers, engineers, and data scientists to deliver AI-powered digital assistants and productivity solutions that drive measurable outcomes. What You’ll Do * Architect solutions for AI-powered proof of concepts and MVPs, with a focus on Digital Assistants and intelligent
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Multiple Product Manager roles focused on leading the definition and development of a Digital Assistant platform powered by AI and LLMs and AI MVPs/PoCs. You’ll work across stakeholders spanning business and technical teams to shape and manage a roadmap that delivers real value, fast. You'll play a key role in bridging the gap between end user needs, enterprise constraints, and cutting edge AI capabilities. Key Responsibilities * Own the product vision and roadmap for the Digital Assistant, aligned to client priorities and user needs * Run discovery sessions with client stakeholders to understand pain points and identify high impact opportunities * Translate business needs into clear product requirements, user stories, and acceptance criteria * Collaborate with engineering, design, and data science teams (internal and client side) to deliver key features
Multiple Product Manager roles focused on leading the definition and development of a Digital Assistant platform powered by AI and LLMs and AI MVPs/PoCs. You’ll work across stakeholders spanning business and technical teams to shape and manage a roadmap that delivers real value, fast. You'll play a key role in bridging the gap between end user needs, enterprise constraints, and cutting edge AI capabilities. Key Responsibilities * Own the product vision and roadmap for the Digital Assistant, aligned to client priorities and user needs * Run discovery sessions with client stakeholders to understand pain points and identify high impact opportunities * Translate business needs into clear product requirements, user stories, and acceptance criteria * Collaborate with engineering, design, and data science teams (internal and client side) to deliver key features
NEWFEATURED