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45 API jobs in Welwyn Garden City + 20 miles
456 exact matches jobs are outside your preferred location
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
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Large Language API's (from 2021) * Assisting with the maintenance and iteration of a FastAPI-based web API hosted on AWS.
Large Language API's (from 2021) * Assisting with the maintenance and iteration of a FastAPI-based web API hosted on AWS.
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Rapidly learn complex API syntaxes and interfaces, understand their business context, and keep pace with ongoing changes.
Rapidly learn complex API syntaxes and interfaces, understand their business context, and keep pace with ongoing changes.
PREMIUM
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
PREMIUM
Senior Solution Architect
Senior Solution Architect
UK Health Security Agency
Canary Wharf, E14 4PU
From £54,416 to £68,344 per annum
The United Kingdom Health Security Agency (UKHSA) is a system leader for health security; taking action internationally to strengthen global health security, providing trusted advice to government and the public and reducing inequalities in the way different communities experience and are impacted by infectious disease, environmental hazards, and other threats to health. UKHSAs remit, as an agency with a global-to-local reach, is to protect the health of the nation from infectious diseases and other external threats to health. * Prevent: anticipate threats to health and help build the nations readiness, defences and health security * Detect: use cutting edge environmental and biological surveillance to proactively detect and monitor infectious diseases and threats to health * Analyse: use world-class science and data analytics to assess and continually monitor threats
The United Kingdom Health Security Agency (UKHSA) is a system leader for health security; taking action internationally to strengthen global health security, providing trusted advice to government and the public and reducing inequalities in the way different communities experience and are impacted by infectious disease, environmental hazards, and other threats to health. UKHSAs remit, as an agency with a global-to-local reach, is to protect the health of the nation from infectious diseases and other external threats to health. * Prevent: anticipate threats to health and help build the nations readiness, defences and health security * Detect: use cutting edge environmental and biological surveillance to proactively detect and monitor infectious diseases and threats to health * Analyse: use world-class science and data analytics to assess and continually monitor threats
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Lead .Net Software Developer
Lead .Net Software Developer
Hireful
Milton Keynes, Buckinghamshire
£65k - £75k base salary plus Bonus and awesome benefits
Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
Are you a hands-on Lead or Senior .Net Developer ready to shape architecture and guide talented developers? Want a hybrid role with 3 days WFH? This is your chance to stay close to the code while making key technical decisions that drive real business impact. You'll join a collaborative, forward-thinking team building cutting-edge products — with the support, tools, and flexibility to thrive. Role: Lead Software Developer, Senior .Net Developer, Software Engineering Manager, Senior Full Stack Developer, Lead .Net Developer, Lead Software Engineer, Senior C# Developer - Salary: £65k - £75k base + Bonus - Benefits: 5% pension, 25 days holiday, 2 wellbeing days, Christmas shutdown, private healthcare, life assurance, cinema tickets & more - Location: Milton Keynes – Hybrid (2 days a week in office) If you’ve got strong .Net (C#) experience and skills in GitHub, APIs, Pos
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API analysis and design
API analysis and design
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IT Platforms Engineer
IT Platforms Engineer
The Health And Care Professions Council
Kennington, SE11 4BU
From £57,000 to £65,000 per annum
Solid working knowledge of Microsoft Azure services, including Web Apps, App Services, Azure Site Recovery, Log Analytics, and Azure API Management. You should be confident working with API documentation and collaborating with technical teams.
Solid working knowledge of Microsoft Azure services, including Web Apps, App Services, Azure Site Recovery, Log Analytics, and Azure API Management. You should be confident working with API documentation and collaborating with technical teams.
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Senior Android Engineer (UI/UX & Welcome Manager)
Senior Android Engineer (UI/UX & Welcome Manager)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
API & Backend Integration: Partner with our backend (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries.
API & Backend Integration: Partner with our backend (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries.
Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
Security Architecture Secure Design Team - Role: Manager Principal Security Architect: Secure Design (Individual Contributor) Grade: GG14 - The Security Architecture Design team is responsible for developing Security Architecture patterns, developing security controls needed for new technology, promoting the use of the architectural patterns into development projects, leading the Security Architecture Design Forum, Evaluating architectural security risks in existing systems, consulting with system development teams and architects on building security into their design. This key task of this role is accelerating the delivery of secure design artefacts and leading secure design interventions - by adding capacity and capability to the team. Reports to: Senior Manager Secure Design - Key Relationships * Business Aligned Principal Security Architects * CyberSecurity Engine
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Senior Technical Business Analyst
Senior Technical Business Analyst
REC SOLUTIONS LIMITED
The City, EC4
Competitive base salary plus bonus and benefits
Technical documentation Produce and maintain detailed technical and functional documentation, including API specifications, configuration workflows, and integration guides. * Proven ability to produce and maintain high-quality technical documentation and API specifications suitable for both engineering and client consumption.
Technical documentation Produce and maintain detailed technical and functional documentation, including API specifications, configuration workflows, and integration guides. * Proven ability to produce and maintain high-quality technical documentation and API specifications suitable for both engineering and client consumption.
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Understanding of cloud-based solutions and communication protocols (SOAP, API, HTTPS, SFTP, etc.).
Understanding of cloud-based solutions and communication protocols (SOAP, API, HTTPS, SFTP, etc.).
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Experience in data engineering, modelling and API design, ensuring scalable and reusable data structures * Experience creating and contributing to key data architecture artefacts, including ERDs, semantic layer designs, data flow documentation, API specs and metadata management
Experience in data engineering, modelling and API design, ensuring scalable and reusable data structures * Experience creating and contributing to key data architecture artefacts, including ERDs, semantic layer designs, data flow documentation, API specs and metadata management
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Salesforce Solution Architect - Remote - London - We're looking for an experienced Salesforce Solution Architect to design, lead, and deliver scalable Salesforce solutions across multiple clouds and integrations. You'll take ownership of the end-to-end architecture, mentor teams, and shape high-impact solutions that drive business success. Key Responsibilities * Lead Salesforce architecture and guide delivery teams. * Design scalable, best-practice solutions and proof-of-concepts. * Collaborate with stakeholders to ensure seamless delivery. * Stay ahead of new Salesforce releases and innovations. What You'll Bring * 5+ years of Salesforce implementation experience. * Strong expertise in Apex, LWC, Aura, VisualForce & REST/SOAP APIs. * Solid grasp of SOQL, SOSL & integration patterns. * Salesforce Certified (PD1, Admin, App Builder).
Salesforce Solution Architect - Remote - London - We're looking for an experienced Salesforce Solution Architect to design, lead, and deliver scalable Salesforce solutions across multiple clouds and integrations. You'll take ownership of the end-to-end architecture, mentor teams, and shape high-impact solutions that drive business success. Key Responsibilities * Lead Salesforce architecture and guide delivery teams. * Design scalable, best-practice solutions and proof-of-concepts. * Collaborate with stakeholders to ensure seamless delivery. * Stay ahead of new Salesforce releases and innovations. What You'll Bring * 5+ years of Salesforce implementation experience. * Strong expertise in Apex, LWC, Aura, VisualForce & REST/SOAP APIs. * Solid grasp of SOQL, SOSL & integration patterns. * Salesforce Certified (PD1, Admin, App Builder).
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Fullstack with C# Dot net HTML Web Software Developer
Fullstack with C# Dot net HTML Web Software Developer
Nexus Jobs
RM12, Hornchurch
From £50,000 to £70,000 per annum
Our Client is leader in the development of software for the financial sector. We are looking for a creative, detail-orientated Web Developer to join our Web Development team. You must have at least 5 years experience of working as a Fullstack Web Software Developer with C# Dot Net HTML and CSS. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. Our client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Ideally, we are looking for Web Developers with five plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with
Our Client is leader in the development of software for the financial sector. We are looking for a creative, detail-orientated Web Developer to join our Web Development team. You must have at least 5 years experience of working as a Fullstack Web Software Developer with C# Dot Net HTML and CSS. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. Our client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Ideally, we are looking for Web Developers with five plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with
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The PE AI Transformation team is redefining how AI powers engineering at Arm! We collaborate with engineering teams across Arm to deliver impact together. Our goal is simple yet ambitious: to boost productivity, fuel innovation, and make powerful AI tools accessible to every engineer. Guided by our visionengineering redefined through smarter workflows, faster execution, and greater creativitywere creating an environment where technology amplifies human potential. As an AI Solutions Architect, youll be a catalyst for this transformation! The role partners with engineering teams across Arm to design, deploy, and scale AI solutions that make development faster, smarter, and more intuitive. Youll apply your technical depth and creativity to deliver impactful, real-world resultsall while shaping Arms next era of AI-driven engineering.
The PE AI Transformation team is redefining how AI powers engineering at Arm! We collaborate with engineering teams across Arm to deliver impact together. Our goal is simple yet ambitious: to boost productivity, fuel innovation, and make powerful AI tools accessible to every engineer. Guided by our visionengineering redefined through smarter workflows, faster execution, and greater creativitywere creating an environment where technology amplifies human potential. As an AI Solutions Architect, youll be a catalyst for this transformation! The role partners with engineering teams across Arm to design, deploy, and scale AI solutions that make development faster, smarter, and more intuitive. Youll apply your technical depth and creativity to deliver impactful, real-world resultsall while shaping Arms next era of AI-driven engineering.
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Proficient in hands-on development, coding, and API design.
Proficient in hands-on development, coding, and API design.
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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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Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
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Location: Esher (two days WFH) Must have Right to Work in the UK (cannot provide sponsorship) This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power Apps,
Location: Esher (two days WFH) Must have Right to Work in the UK (cannot provide sponsorship) This person will contribute directly to the organisations digital transformation roadmap by embedding automation and AI into our operations and business. This will involve building AI-powered conversational agents and automating business processes using Microsoft Power Platform tools like Power Apps, Power Automate, and Power Virtual Agents (part of Microsoft Copilot Studio). * Chatbot Development: Design, build, and implement AI chatbots using Power Virtual Agents/Copilot Studio to streamline interactions and automate tasks. * Process Automation: Create automated workflows and processes using Power Automate to improve efficiency and reduce manual tasks, often incorporating AI capabilities. * Application Development: Develop intelligent business applications with Power Apps,
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SeniorPower Platform developer
SeniorPower Platform developer
Halian Technology Limited
W1, Central London
From £70,000 to £85,000 per annum Plus bonus and benefits
My client is an award-winning and market-leading insights and solutions provider across pensions and financial services, energy, health, and analytics. The Opportunity - We're looking for an experienced and innovativePower Platform Developerto join my clients growing team. Youll play a key role in designing, developing, and supporting scalable, user-friendly business applications, automation workflows, and analytics solutions using Microsoft Power Platform. This is a fantastic opportunity to work across a diverse range of business areas, collaborating closely with stakeholders to drive digital transformation and operational efficiency. Key Responsibilities * Design, build, and maintain custom business applications usingPower Apps * Develop and enhance workflows and automations withPower Automate * Create interactive dashboards and data visualisations usingPower BI
My client is an award-winning and market-leading insights and solutions provider across pensions and financial services, energy, health, and analytics. The Opportunity - We're looking for an experienced and innovativePower Platform Developerto join my clients growing team. Youll play a key role in designing, developing, and supporting scalable, user-friendly business applications, automation workflows, and analytics solutions using Microsoft Power Platform. This is a fantastic opportunity to work across a diverse range of business areas, collaborating closely with stakeholders to drive digital transformation and operational efficiency. Key Responsibilities * Design, build, and maintain custom business applications usingPower Apps * Develop and enhance workflows and automations withPower Automate * Create interactive dashboards and data visualisations usingPower BI
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My Customer is looking for a talented Power Platform Developer to join their growing team. You’ll play a key role in building, and maintaining PowerApps, ensuring seamless integration with SharePoint and other Microsoft 365 tools. You’ll also help define and implement versioning and governance policies to keep the Power Platform solutions organised, secure, and scalable. * Strong experience developing and deploying PowerApps (Canvas and/or Model-Driven). * Proven background working with SharePoint Online (data structure, permissions, and integration). * Experience connecting PowerApps to live data sources (Dataverse, SQL, SharePoint, or REST APIs). * Understanding of version control and governance best practices for Power Platform. * Familiarity with Microsoft Teams and OneDrive integration (desirable). * Excellent problem-solving skills and attention to detail.
My Customer is looking for a talented Power Platform Developer to join their growing team. You’ll play a key role in building, and maintaining PowerApps, ensuring seamless integration with SharePoint and other Microsoft 365 tools. You’ll also help define and implement versioning and governance policies to keep the Power Platform solutions organised, secure, and scalable. * Strong experience developing and deploying PowerApps (Canvas and/or Model-Driven). * Proven background working with SharePoint Online (data structure, permissions, and integration). * Experience connecting PowerApps to live data sources (Dataverse, SQL, SharePoint, or REST APIs). * Understanding of version control and governance best practices for Power Platform. * Familiarity with Microsoft Teams and OneDrive integration (desirable). * Excellent problem-solving skills and attention to detail.
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Power Platform Developer
Power Platform Developer
Cathcart Technology
London
£65000.00 - £72500.00 per annum + Bonus & Pension etc
A well-respected consultancy is looking for a talented Power Platform Developer to join their growing Digital Services team in London (hybrid). This is a great opportunity to work across multiple sectors ranging from finance all the way to health analytics where you'll be helping to design and deliver innovative digital solutions that make a real difference. This company is known for empowering its people to explore new technologies and shape how the business works. You'll be joining a supportive, collaborative environment and tight-knit team where your ideas will be valued and your work will have real visibility. The Role - You'll play a key part in designing, building and maintaining business applications, workflows and automations using the Microsoft Power Platform. You'll work with Power Apps, Power Automate, Power BI and Dataverse to deliver scalable, data-driven
A well-respected consultancy is looking for a talented Power Platform Developer to join their growing Digital Services team in London (hybrid). This is a great opportunity to work across multiple sectors ranging from finance all the way to health analytics where you'll be helping to design and deliver innovative digital solutions that make a real difference. This company is known for empowering its people to explore new technologies and shape how the business works. You'll be joining a supportive, collaborative environment and tight-knit team where your ideas will be valued and your work will have real visibility. The Role - You'll play a key part in designing, building and maintaining business applications, workflows and automations using the Microsoft Power Platform. You'll work with Power Apps, Power Automate, Power BI and Dataverse to deliver scalable, data-driven
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Senior Data Architect
Senior Data Architect
Cambridge University Press & Assessment
CB2, Cambridge, CB2 8BS
From £70,400 to £94,100 per annum
Job Title:Senior Data Architect - Salary:£70,400 - £94,100 - Location:Cambridge/Hybrid with office attendance for an average of 2 days a week - Contract:Permanent - Shape the future of data and AI at Cambridge University Press & Assessment - We are Cambridge University Press & Assessment, a world-leading academic publisher and assessment organisation and a proud part of the University of Cambridge. About the role - As a SeniorData Architect, you will play a pivotal role in delivering a coherent and scalable data framework aligned with our enterprise data strategy. You'll advance key architectural principles such as data mesh, data products, and data contracts, while enabling the strategic use of Artificial Intelligence (AI) and Generative AI (GenAI) across the organisation. You'll beresponsible for promoting the data strategy, securing stakeholder buy-in, and defining
Job Title:Senior Data Architect - Salary:£70,400 - £94,100 - Location:Cambridge/Hybrid with office attendance for an average of 2 days a week - Contract:Permanent - Shape the future of data and AI at Cambridge University Press & Assessment - We are Cambridge University Press & Assessment, a world-leading academic publisher and assessment organisation and a proud part of the University of Cambridge. About the role - As a SeniorData Architect, you will play a pivotal role in delivering a coherent and scalable data framework aligned with our enterprise data strategy. You'll advance key architectural principles such as data mesh, data products, and data contracts, while enabling the strategic use of Artificial Intelligence (AI) and Generative AI (GenAI) across the organisation. You'll beresponsible for promoting the data strategy, securing stakeholder buy-in, and defining
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AVEVA is creating software trusted by over 90% of leading industrial companies. Job Description - Job Title: Senior Software Developer - Location: Cambridge, United Kingdom Hybrid (3 days at the office) Employment Type: Full-time regular (flexible working options available) The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformatio
AVEVA is creating software trusted by over 90% of leading industrial companies. Job Description - Job Title: Senior Software Developer - Location: Cambridge, United Kingdom Hybrid (3 days at the office) Employment Type: Full-time regular (flexible working options available) The job - As part of our Industrial Platform Group, you will join a talented team of software engineers dedicated to designing, developing, and evolving CONNECT - the core industrial intelligence platform at AVEVA. CONNECT powers a diverse range of digital solutions deployed across global industries by AVEVA and our partners. In this role, youll work closely with internal stakeholders and engineering teams to understand requirements, shape system architecture, and deliver scalable platform capabilities. Your contributions will directly impact how CONNECT supports our customers digital transformatio
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