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47 API jobs in Welwyn Garden City + 20 miles
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Backend Engineer Python
Backend Engineer Python
Plexus Resource Solutions Ltd
EC1, City of London
From £90,000 to £120,000 per annum
Backend Engineer - On-Chain Social Network - Remote £90k £120k - Plexus are working with an on-chain social network that empowers people to express themselves, connect with others, and explore the value of imagination. To support our growth and deliver a world-class experience, were looking for a Backend Engineer to join our core product team. Responsibilities * Work closely with the team to design, build, and deliver new product features * Develop and maintain the APIs that power our platform * Contribute to system reliability by taking part in our on-call rotation - Requirements * Solid experience with Python, GraphQL, and MongoDB * Flexibility to move across the stack when needed * Hands-on experience in blockchain development * Strong product intuition with a focus on user experience - Benefits * Competitive salary * Top-quality medical, dental & vision insurance
Backend Engineer - On-Chain Social Network - Remote £90k £120k - Plexus are working with an on-chain social network that empowers people to express themselves, connect with others, and explore the value of imagination. To support our growth and deliver a world-class experience, were looking for a Backend Engineer to join our core product team. Responsibilities * Work closely with the team to design, build, and deliver new product features * Develop and maintain the APIs that power our platform * Contribute to system reliability by taking part in our on-call rotation - Requirements * Solid experience with Python, GraphQL, and MongoDB * Flexibility to move across the stack when needed * Hands-on experience in blockchain development * Strong product intuition with a focus on user experience - Benefits * Competitive salary * Top-quality medical, dental & vision insurance
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ABAP Developer - Break out of the SAP Box
ABAP Developer - Break out of the SAP Box
LJ Recruitment Limited
EC1, City of London
£50000 - £75000 per annum
ABAP Developer ? AI / Startup Role?? Most ABAP roles keep you maintaining the same old codebase. This one lets you take your SAP expertise and plug it straight into a modern AI platform that's transforming how global enterprises run their tech. This London startup is tackling a multi-billion-dollar problem: helping the world's biggest companies turn ERP chaos into clarity. Their AI engine saves millions in IT costs, accelerates project timelines by months, and modernises decades-old systems in ways that have never been done before. This is a role for those who live and breathe tech. Hours run 9am-7pm, and the expectation is clear: hard work and full commitment are what make the difference here. What you'll do * Write and optimise ABAP while shaping how AI agents interpret SAP. * Go beyond SAP, contribute to backend services, APIs, and infrastructure.
ABAP Developer ? AI / Startup Role?? Most ABAP roles keep you maintaining the same old codebase. This one lets you take your SAP expertise and plug it straight into a modern AI platform that's transforming how global enterprises run their tech. This London startup is tackling a multi-billion-dollar problem: helping the world's biggest companies turn ERP chaos into clarity. Their AI engine saves millions in IT costs, accelerates project timelines by months, and modernises decades-old systems in ways that have never been done before. This is a role for those who live and breathe tech. Hours run 9am-7pm, and the expectation is clear: hard work and full commitment are what make the difference here. What you'll do * Write and optimise ABAP while shaping how AI agents interpret SAP. * Go beyond SAP, contribute to backend services, APIs, and infrastructure.
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Enterprise Solution Architect - London Insurance Markets
Enterprise Solution Architect - London Insurance Markets
Sanderson Recruitment
EC1, City of London
£485 - £950 per day + Umbrella Engagement
Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
Senior Solution Architect / Enterprise Solutuion Architect - Our client operate within the London Market insurance industry, recognised for its innovation, scale, and commitment to digital transformation. The organisation is undertaking a multi-year technology modernisation initiative aimed at enhancing core underwriting, claims, and broking platforms - and this role plays a pivotal part in shaping that future. The Opportunity - We've had a brilliant brief for a Senior Solution / Enterprise Architect to join a well-known brand within the London Market. You'll work closely with the Head of Architecture and a talented team of Enterprise and Senior Solution Architects to help define and evolve the organisation's strategic technology roadmap. This is a software and application-focused role, ideal for someone who brings deep London Market insurance domain expertise and a s
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About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
About This Opportunity - We are supporting Welldone Consulting in their search for a founding Head of Delivery. This is a unique opportunity to establish, shape, and grow a business at the forefront of accessible mobile app consulting in the UK. About Welldone Consulting - Welldone Consulting focuses on building future-ready, inclusive, and commercially strategic mobile apps. Their mission is to help organisations not just comply with the European Accessibility Act but also to drive greater loyalty, adoption, and revenue by improving mobile user experiences for everyone. Role Purpose * Lead client engagements from initial contact to completion. * Develop frameworks for delivery and build an associate consultant model. * Serve as the public face and thought leader for the consultancy. Key Responsibilities - Client Engagement * Act as the main point of contact through p
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£80,000 - £85,000 - Well-established and highly profitable construction engineering business is seeking an experienced IT Applications Manager to join them on a permanent basis. This is a critical leadership role within an organisation undergoing significant digital transformation, with ambitious growth and acquisition plans driving demand for scalable, standardised and efficient business applications. Reporting into the Head of IT, you will lead the delivery, governance and optimisation of business applications across the enterprise. This role blends strategic oversight, hands-on expertise with modern low-code/no-code platforms and direct leadership of a multidisciplinary applications team. The IT Applications Manager will oversee a suite of core enterprise systems, including but not limited to: Workday, UKG (Kronos), COINS, SharePoint, Snowflake, Autodesk Constructi
£80,000 - £85,000 - Well-established and highly profitable construction engineering business is seeking an experienced IT Applications Manager to join them on a permanent basis. This is a critical leadership role within an organisation undergoing significant digital transformation, with ambitious growth and acquisition plans driving demand for scalable, standardised and efficient business applications. Reporting into the Head of IT, you will lead the delivery, governance and optimisation of business applications across the enterprise. This role blends strategic oversight, hands-on expertise with modern low-code/no-code platforms and direct leadership of a multidisciplinary applications team. The IT Applications Manager will oversee a suite of core enterprise systems, including but not limited to: Workday, UKG (Kronos), COINS, SharePoint, Snowflake, Autodesk Constructi
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Location: London - 1x a month - Salary: £95,000 - £120,000 + equity + benefits - An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects from the ground up - architecting scalable, data-driven systems that empower venues to deliver seamless guest experiences and drive long-term innovation. What will I be doing? * Lead the technical vision and architectural direction across complex backend systems, ensuring scalability, reliability, and performance. * Partner closely with engineering leadership to define best practices, coding standards, and long-term technical strategy. * Design, develop, and oversee the delivery of robust, production-grade software built using Python, D
Location: London - 1x a month - Salary: £95,000 - £120,000 + equity + benefits - An established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects from the ground up - architecting scalable, data-driven systems that empower venues to deliver seamless guest experiences and drive long-term innovation. What will I be doing? * Lead the technical vision and architectural direction across complex backend systems, ensuring scalability, reliability, and performance. * Partner closely with engineering leadership to define best practices, coding standards, and long-term technical strategy. * Design, develop, and oversee the delivery of robust, production-grade software built using Python, D
Location: London 1x a month - Salary: £75,000 - £95,000 + equity + benefits - An established, global technology business within the hospitality-tech industry is seeking a talented Backend Software Engineer to help build and scale cutting-edge digital solutions. This is a chance to work on greenfield projects - building new, scalable products that help venues create seamless, data-driven guest experiences from the ground up. What will I be doing? * Design, develop, test, and maintain high-performance backend systems supporting real-time hospitality operations. * Take ownership of key features throughout the software development lifecycle - from technical design through to deployment and ongoing optimisation. * Collaborate with cross-functional teams including product, design, and data science to deliver innovative, customer-focused solutions.
Location: London 1x a month - Salary: £75,000 - £95,000 + equity + benefits - An established, global technology business within the hospitality-tech industry is seeking a talented Backend Software Engineer to help build and scale cutting-edge digital solutions. This is a chance to work on greenfield projects - building new, scalable products that help venues create seamless, data-driven guest experiences from the ground up. What will I be doing? * Design, develop, test, and maintain high-performance backend systems supporting real-time hospitality operations. * Take ownership of key features throughout the software development lifecycle - from technical design through to deployment and ongoing optimisation. * Collaborate with cross-functional teams including product, design, and data science to deliver innovative, customer-focused solutions.
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Front End Developer
Front End Developer
Sanderson Government and Defence
EC1, City of London
£400 - £500 per day + outside IR35
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
Details - Clearance required: SC Cleared - IR35 Status: Outside IR35 - Start date: 01/12/2025 - Pay rate: 400-500/d - We are forming a new Data Team to deliver a unified, user-friendly interface that consolidates dashboards, reports, and analytical outputs from across the organisation. This 'single pane of glass' will serve as the central hub for stakeholders to explore data, monitor performance, and make informed decisions. As the Front-End Developer, you will play a pivotal role in designing and building this interface from the ground up. You'll work closely with Data Analysts, Data Scientists, Engineers, and Business Analysts to understand their outputs and translate them into intuitive, dynamic visual experiences. Your work will directly influence how data is consumed and acted upon across the organisation. Responsibilities
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AI Python Developer - Fully Remote
AI Python Developer - Fully Remote
VERTECH GROUP (UK) LTD
N7, North London
From £100,000 to £110,000 per annum + Benefits
AI Python Developer - Location: Fully Remote - Salary: Circa 100K 110K + Benefits - AI Python Developer required by a fast-growing, revolutionary Tech Company! You'll play a key role in integrating AI functionality into production systems, working closely with other developers to deliver scalable, reliable, and well-structured solutions * At least 4 years backend development experience * Strong expertise inPython(FastAPI, Flask, or Django) * Good understanding of backend architecture, APIs, and cloud environments (AWS, Azure, or GCP) * Experience integratingAI or LLM APIsand open-source models into live products * Hands-on experience building or maintainingRetrieval-Augmented Generation (RAG)pipelines - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where you'll be able to bring ideas, stay up to date with
AI Python Developer - Location: Fully Remote - Salary: Circa 100K 110K + Benefits - AI Python Developer required by a fast-growing, revolutionary Tech Company! You'll play a key role in integrating AI functionality into production systems, working closely with other developers to deliver scalable, reliable, and well-structured solutions * At least 4 years backend development experience * Strong expertise inPython(FastAPI, Flask, or Django) * Good understanding of backend architecture, APIs, and cloud environments (AWS, Azure, or GCP) * Experience integratingAI or LLM APIsand open-source models into live products * Hands-on experience building or maintainingRetrieval-Augmented Generation (RAG)pipelines - Tremendous opportunity offering plenty of scope for career progression in a friendly, innovative environment where you'll be able to bring ideas, stay up to date with
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Senior Full Stack Engineer
Senior Full Stack Engineer
REVYBE IT RECRUITMENT LIMITED
EC1, City of London
From £100,000 to £120,000 per annum + Shares
London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role - This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP.
London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role - This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP.
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API-OpenAPI/GraphQL/GRPC
API-OpenAPI/GraphQL/GRPC
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Quantitative Analyst - Modelling and Structured Credit
Quantitative Analyst - Modelling and Structured Credit
CBSbutler Holdings Limited
EC1, City of London
£80000 - £120000 per annum + Bonus + Full Benefits
Leverage and integrate Intex analytics, with particular focus on the latest Intex API. o Solid, hands-on experience with Intex, including recent use of the latest Intex API.
Leverage and integrate Intex analytics, with particular focus on the latest Intex API. o Solid, hands-on experience with Intex, including recent use of the latest Intex API.
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Apply DevOps concepts and use Azure ADB2C and cloud services (API management, App Service, Azure configurations).
Apply DevOps concepts and use Azure ADB2C and cloud services (API management, App Service, Azure configurations).
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AI (artificial intelligence) DevOps Engineer
AI (artificial intelligence) DevOps Engineer
Huxley Associates
EC1, City of London
£60000 - £90000 per annum
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
You'll also ensure alignment with enterprise-grade security practices, including zero trust principles, identity-aware routing, and integration with Azure API Management and Application Gateway. * API Gateway, Azure API Management (APIM), Azure Application Gateway
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Proficiency with Git workflows, LAMP stack, and REST API integrations.
Proficiency with Git workflows, LAMP stack, and REST API integrations.
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Data exchange and processing skills (e.g. ETL, ESB, API...)
Data exchange and processing skills (e.g. ETL, ESB, API...)
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Experience with API testing tools such as Postman.
Experience with API testing tools such as Postman.
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Principal Software Engineer - Unified Client Experience (UCX)
Principal Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
Up to £11500 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
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Senior Software Engineer - Unified Client Experience (UCX)
Senior Software Engineer - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£75000 - £95000 per annum + Generous bonus, pension, PMI & more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
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Software Engineering Manager - Unified Client Experience (UCX)
Software Engineering Manager - Unified Client Experience (UCX)
Hargreaves Lansdown
EC1, City of London
£90000 - £115000 per annum + Generous bonus, pension, PMI and more
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
Solid experience in building and deploying frontend applications in React or React Native with hands-on knowledge of secure API design and authentication services.
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Your Opportunity: Based in our Enfield office with a hybrid working model, youll join the Global Customer Satisfaction department as a Technical Support Specialist. If youre passionate about providing outstanding customer support, building strong client relationships, and enjoy working in a fast-paced, technology-focused environment, this is the role for you! Were seeking a dedicated French-speaking Technical Support Specialist to assist customers using EBSCO software solutions and help ensure their success. * Troubleshoot and resolve product-related issues * Guide clients through installation, configuration, and upgrades * Monitor customer casework and ensure timely resolution * Conduct proactive service meetings and communicate updates * Advocate for customer needs across internal teams * Deliver internal training and maintain support documentation
Your Opportunity: Based in our Enfield office with a hybrid working model, youll join the Global Customer Satisfaction department as a Technical Support Specialist. If youre passionate about providing outstanding customer support, building strong client relationships, and enjoy working in a fast-paced, technology-focused environment, this is the role for you! Were seeking a dedicated French-speaking Technical Support Specialist to assist customers using EBSCO software solutions and help ensure their success. * Troubleshoot and resolve product-related issues * Guide clients through installation, configuration, and upgrades * Monitor customer casework and ensure timely resolution * Conduct proactive service meetings and communicate updates * Advocate for customer needs across internal teams * Deliver internal training and maintain support documentation
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C# .NET Software Developer (Full time or Part time)
C# .NET Software Developer (Full time or Part time)
Gas Management Services Limited
Epping, Essex
Competitive
We have a great opportunity for a C# .NET Software Developer (Full time or Part time) to join our team in Cambridge. Apply with your CV and covering letter - Opportunity - We have a great opportunity for a C# .NET Software Developer to join our fantastic software development team based in Cambridge. This is an ideal role for someone who wants to join a friendly, small and highly technical team where you can have a real impact. The role - You will be embedded as a full-stack developer in one of our small agile development teams. You will collaborate alongside product owners, testers and other developers to develop features for our power-scheduling software product. Our view of agile software development is inspired by eXtreme Programming rather than Scrum. We focus more on the technical practices that enable agility, such as TDD, Pair Programming, SOLID, Simple Design
We have a great opportunity for a C# .NET Software Developer (Full time or Part time) to join our team in Cambridge. Apply with your CV and covering letter - Opportunity - We have a great opportunity for a C# .NET Software Developer to join our fantastic software development team based in Cambridge. This is an ideal role for someone who wants to join a friendly, small and highly technical team where you can have a real impact. The role - You will be embedded as a full-stack developer in one of our small agile development teams. You will collaborate alongside product owners, testers and other developers to develop features for our power-scheduling software product. Our view of agile software development is inspired by eXtreme Programming rather than Scrum. We focus more on the technical practices that enable agility, such as TDD, Pair Programming, SOLID, Simple Design
470 exact matches jobs are outside your preferred location
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Test Automation Developer Python API
Test Automation Developer Python API
Client Server
Milton, CB24
£40000 - £50000 per annum + bonus + benefits
Test Automation Developer / Engineer (Python API Automation) Cambridge to £50k * You have API testing experience - Apply now to find out more about this Test Automation Developer (Python API Automation) opportunity.
Test Automation Developer / Engineer (Python API Automation) Cambridge to £50k * You have API testing experience - Apply now to find out more about this Test Automation Developer (Python API Automation) opportunity.
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Senior API Technical Consultant (GraphQL Specialist)
Senior API Technical Consultant (GraphQL Specialist)
Staffworx Limited
London
market rates, outside IR35, 2 days on site
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
Lead the designand evolution of our API schemas, ensuring they meet the complex demands of a rapidly growing platform. * Expert levelGraphQL, including advanced API design, schema evolution, performance optimisation.
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Java / Camunda Engineer
Java / Camunda Engineer
Profile 29
SE1, South East London
From £35,000 to £65,000 per annum + hybrid working
Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid
Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients build secure, scalable, and resilient digital services. Profile 29 recruitment keywords: Java software engineer object-oriented design OOD Camunda BPMN DMN Spring Boot REST API microservice architecture Docker Kubernetes containerisation orchestration Git CI/CD pipelines automated testing frameworks Kafka RabbitMQ Security authentication integration patterns enterprise systems agile digital transformation automation Java developer Camunda developer Zeebe Cloud AWS Azure GCP Terraform Helm process automation agentic AI artificial intelligence security clearance SC DV eDV London home based hybrid