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71 Permanent API jobs in St. Albans + 20 miles
224 exact matches jobs are outside your preferred location
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Our client, a well-known global brand, is seeking a Systems Analyst to join their IT Application Development Team based in London. This is a key role that will bridge the gap between business analysts and development teams, ensuring business requirements are translated into technically robust and user-focused solutions. * Collaborate with stakeholders to gather and analyse business requirements across internal systems. * Translate requirements into detailed backlog items and technical documentation. * Create wireframes, mock-ups, and prototypes using Figma to support development and stakeholder engagement. * Work closely with developers, testers, and product owners to enhance .NET-based systems and RESTful APIs. * Participate in Agile ceremonies including sprint planning, backlog grooming, and retrospectives. * Maintain documentation throughout the project lifecycle.
Our client, a well-known global brand, is seeking a Systems Analyst to join their IT Application Development Team based in London. This is a key role that will bridge the gap between business analysts and development teams, ensuring business requirements are translated into technically robust and user-focused solutions. * Collaborate with stakeholders to gather and analyse business requirements across internal systems. * Translate requirements into detailed backlog items and technical documentation. * Create wireframes, mock-ups, and prototypes using Figma to support development and stakeholder engagement. * Work closely with developers, testers, and product owners to enhance .NET-based systems and RESTful APIs. * Participate in Agile ceremonies including sprint planning, backlog grooming, and retrospectives. * Maintain documentation throughout the project lifecycle.
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Job Overview - In this role, youll play a key part in developing and leading data centre network initiatives, working collaboratively with diverse Infrastructure and Global Networks teams across multiple time zones. Together, youll deliver change and transformation across business-critical services. Some out-of-hours work may occasionally be required to support global operations. Youll bring your expertise as a skilled Data Centre Network Engineer to design, implement, manage, and support the networking infrastructure that underpins our data centres. Youll possess a strong knowledge of enterprise networking technologies, particularly Cisco ACI and Cisco SD-WAN, ensuring our networks are secure, scalable, and high-performing. Experience with automation and Infrastructure-as-Code (IaC) will help you develop efficient and reliable solutions that strengthen Arms global ..
Job Overview - In this role, youll play a key part in developing and leading data centre network initiatives, working collaboratively with diverse Infrastructure and Global Networks teams across multiple time zones. Together, youll deliver change and transformation across business-critical services. Some out-of-hours work may occasionally be required to support global operations. Youll bring your expertise as a skilled Data Centre Network Engineer to design, implement, manage, and support the networking infrastructure that underpins our data centres. Youll possess a strong knowledge of enterprise networking technologies, particularly Cisco ACI and Cisco SD-WAN, ensuring our networks are secure, scalable, and high-performing. Experience with automation and Infrastructure-as-Code (IaC) will help you develop efficient and reliable solutions that strengthen Arms global ..
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Join a fast-growing AI startup transforming a trillion-pound industry through intelligent automation. We're building the next generation of workflow technology - streamlining complex, manual processes and empowering professionals to focus on the work that truly matters. If you love solving deep technical problems, shaping architecture, and seeing your code have a real-world impact, this is a chance to build something meaningful from the ground up. The Role - We're looking for a Senior Backend Engineer to take ownership of key backend services that power our AI-driven platform. You'll work closely with product, frontend, and AI teams to design, build, and scale backend systems that handle large-scale data, complex workflows, and real-time interactions. You'll join a small, high-calibre team where your ideas genuinely shape the direction of the product and the company.
Join a fast-growing AI startup transforming a trillion-pound industry through intelligent automation. We're building the next generation of workflow technology - streamlining complex, manual processes and empowering professionals to focus on the work that truly matters. If you love solving deep technical problems, shaping architecture, and seeing your code have a real-world impact, this is a chance to build something meaningful from the ground up. The Role - We're looking for a Senior Backend Engineer to take ownership of key backend services that power our AI-driven platform. You'll work closely with product, frontend, and AI teams to design, build, and scale backend systems that handle large-scale data, complex workflows, and real-time interactions. You'll join a small, high-calibre team where your ideas genuinely shape the direction of the product and the company.
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Software Engineer
Software Engineer
Inspire People
CR2, South Croydon
£41100 - £44400 per annum + 29% pension + Civil Service benefits
HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
HM Land Registry (HMLR) are modernising the systems and services that underpin property ownership across England and Wales - some of the most valuable data in the UK economy. As a Software Developer, you'll play an important role in designing, building and supporting the digital services that help secure property rights and enable the housing market to function. Salary up to £44,400, 29% employer pension contribution plus full Civil Service benefits. Flexible, hybrid working from 14 office locations across the UK. Job Summary - You will join HMLR's Software Development Practice, part of the wider Digital, Data and Technology (DDaT) directorate. The practice includes Developers who work in multidisciplinary agile teams with product managers, delivery managers, testers, business analysts and user researchers.
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£40,000 to £90,000 (DOE) + performance bonus - Permanent - Hybrid - UK nationals only |Must hold SC clearance - About the Role - An innovative UK technology company is developing a next-generation AI platform designed for defence and health applications. Were looking for a Software Engineer who thrives on learning quickly, solving complex technical problems, and building systems that make a real-world impact. This is a genuine ground-floor opportunity to influence both the technology and your career path within a growing, mission-driven business. What Youll Work On * Design, build, and scale intelligent systems and microservices * Develop AI-driven capabilities (e.g. LLMs, retrieval-augmented generation (RAG), and AI agents) * Build and maintain APIs, data pipelines, and backend components (primarily Python, FastAPI, or Flask)
£40,000 to £90,000 (DOE) + performance bonus - Permanent - Hybrid - UK nationals only |Must hold SC clearance - About the Role - An innovative UK technology company is developing a next-generation AI platform designed for defence and health applications. Were looking for a Software Engineer who thrives on learning quickly, solving complex technical problems, and building systems that make a real-world impact. This is a genuine ground-floor opportunity to influence both the technology and your career path within a growing, mission-driven business. What Youll Work On * Design, build, and scale intelligent systems and microservices * Develop AI-driven capabilities (e.g. LLMs, retrieval-augmented generation (RAG), and AI agents) * Build and maintain APIs, data pipelines, and backend components (primarily Python, FastAPI, or Flask)
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In 1914, Ernest Shackleton placed an advertisement seeking men for his Antarctic expeditionFor hazardousjourneyintounchartedterritory. Smallwages. Longhoursnavigatingcomplexity. Thousandsresponded. Today,weseekadifferentkindofpioneer;onewhowillchartthecoursethroughtheunexploredfrontierofartificial intelligence. We are not just implementing AI; we're defining what's possible. We're one of the first to venture into territories where others see only questions. Where they see complexity, we see opportunity. Wherethey see risk, we see the path forward. This role is looking for a talented AI Deployment Engineer who is keen to join a start-up! You will be joining a start-up with a mission to deploy cutting-edge AI systems for marketing businesses. This isn't about following playbooks, there are none. You'll be writing them. Every implementation is a first ascent.
In 1914, Ernest Shackleton placed an advertisement seeking men for his Antarctic expeditionFor hazardousjourneyintounchartedterritory. Smallwages. Longhoursnavigatingcomplexity. Thousandsresponded. Today,weseekadifferentkindofpioneer;onewhowillchartthecoursethroughtheunexploredfrontierofartificial intelligence. We are not just implementing AI; we're defining what's possible. We're one of the first to venture into territories where others see only questions. Where they see complexity, we see opportunity. Wherethey see risk, we see the path forward. This role is looking for a talented AI Deployment Engineer who is keen to join a start-up! You will be joining a start-up with a mission to deploy cutting-edge AI systems for marketing businesses. This isn't about following playbooks, there are none. You'll be writing them. Every implementation is a first ascent.
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We're looking for a highly skilled Senior Full Stack Developer with strong experience in C# .NET and React to join our growing tech team. You'll play a key role in designing, building, and maintaining robust, scalable web applications, working across the full stack to deliver high-quality solutions that drive real value. This is a hybrid role with two days a week based in the office. * Design, develop, and maintain web applications using C# .NET (Core/Framework) and React. * Collaborate with cross-functional teams to define, design, and ship new features. * Write clean, scalable, and testable code. * Troubleshoot and debug applications. * Mentor junior developers and contribute to best practices. * 5+ years of experience as a Full Stack Developer. * Strong proficiency in C# .NET (Core) and React. * Solid understanding of REST APIs, SQL/NoSQL databases, and version con
We're looking for a highly skilled Senior Full Stack Developer with strong experience in C# .NET and React to join our growing tech team. You'll play a key role in designing, building, and maintaining robust, scalable web applications, working across the full stack to deliver high-quality solutions that drive real value. This is a hybrid role with two days a week based in the office. * Design, develop, and maintain web applications using C# .NET (Core/Framework) and React. * Collaborate with cross-functional teams to define, design, and ship new features. * Write clean, scalable, and testable code. * Troubleshoot and debug applications. * Mentor junior developers and contribute to best practices. * 5+ years of experience as a Full Stack Developer. * Strong proficiency in C# .NET (Core) and React. * Solid understanding of REST APIs, SQL/NoSQL databases, and version con
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Principal Software Engineer - Frontend
Principal Software Engineer - Frontend
Fruition Group
London
£95000 - £120000 per annum + Equity + Benefits
London (Remote First - Occasional travel) Salary: £95,000 - £120,000 + equity + benefits - An established, global technology business within the hospitality-tech industry is seeking a talented Principal Frontend 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. * Set the technical vision and architectural direction for frontend systems, ensuring performance, scalability, and maintainability across complex products. * Lead design and delivery of modern, component-based web applications built with TypeScript, React, and Redux, integrating seamlessly with cloud-based APIs and data pipelines. * Collaborate with engineering, design, and product leadership to define long-term frontend st
London (Remote First - Occasional travel) Salary: £95,000 - £120,000 + equity + benefits - An established, global technology business within the hospitality-tech industry is seeking a talented Principal Frontend 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. * Set the technical vision and architectural direction for frontend systems, ensuring performance, scalability, and maintainability across complex products. * Lead design and delivery of modern, component-based web applications built with TypeScript, React, and Redux, integrating seamlessly with cloud-based APIs and data pipelines. * Collaborate with engineering, design, and product leadership to define long-term frontend st
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Opportunity for a AI Engineer Developer to work for an established FinTech company * Salary up to £75k depending on experience * Hybrid working out of Sevenoaks HQ * Tech stack - LLMs, Langchain, OpenAI, n8n, Flowable - We're working with a well-established, technology-driven FinTech company that's redefining how automation and AI power financial services. Combining innovation with stability, they've built a reputation as one of the UK's fastest-growing and most forward-thinking finance providers, now they're looking to strengthen their AI and automation capability. * Build intelligent workflows using n8n, Microsoft Power Automate, Flowable, and similar tools. * Design and implement agentic AI solutions, integrating LLMs and frameworks such as LangChain, AutoGen, and RAG pipelines with platforms like OpenAI.
Opportunity for a AI Engineer Developer to work for an established FinTech company * Salary up to £75k depending on experience * Hybrid working out of Sevenoaks HQ * Tech stack - LLMs, Langchain, OpenAI, n8n, Flowable - We're working with a well-established, technology-driven FinTech company that's redefining how automation and AI power financial services. Combining innovation with stability, they've built a reputation as one of the UK's fastest-growing and most forward-thinking finance providers, now they're looking to strengthen their AI and automation capability. * Build intelligent workflows using n8n, Microsoft Power Automate, Flowable, and similar tools. * Design and implement agentic AI solutions, integrating LLMs and frameworks such as LangChain, AutoGen, and RAG pipelines with platforms like OpenAI.
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Automation Test Engineer
Automation Test Engineer
Data Careers
London
£55000 - £90000 per annum + comprehensive range of Employee Benefits
Automation Tester (ETRM Platforms) Permanent - Location: UK - Remote - Salary: £55,000 - £90,000 (+ benefits) Skills: ETRM platform experience, (Openlink Endur, Findur etc.), Automation testing Python, Java etc. We are seeking Automation Testers, (up to Lead Tester), for a leading software company that delivers advanced solutions for trading and risk management across global financial and energy markets. There are options for both fully remote and hybrid / London working. What you'll bring * Programming & Scripting: Python, Java, JavaScript, C++, Scriban * Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS, Node.js * Databases: SQL Server, MySQL, PostgreSQL, MongoDB * Tools & Frameworks: Git, Docker, Jenkins, Kubernetes, Agile (Scrum & Kanban), JIRA, Pytest, Powershell * Operating Systems: Linux, Windows * CI/CD pipelines and debugging expertise * BDD frameworks su
Automation Tester (ETRM Platforms) Permanent - Location: UK - Remote - Salary: £55,000 - £90,000 (+ benefits) Skills: ETRM platform experience, (Openlink Endur, Findur etc.), Automation testing Python, Java etc. We are seeking Automation Testers, (up to Lead Tester), for a leading software company that delivers advanced solutions for trading and risk management across global financial and energy markets. There are options for both fully remote and hybrid / London working. What you'll bring * Programming & Scripting: Python, Java, JavaScript, C++, Scriban * Web Technologies: RESTful APIs, HTTP, JSON, HTML, CSS, Node.js * Databases: SQL Server, MySQL, PostgreSQL, MongoDB * Tools & Frameworks: Git, Docker, Jenkins, Kubernetes, Agile (Scrum & Kanban), JIRA, Pytest, Powershell * Operating Systems: Linux, Windows * CI/CD pipelines and debugging expertise * BDD frameworks su
We're looking for a highly skilled Senior Full Stack Developer with strong experience in C# .NET and React to join our growing tech team. You'll play a key role in designing, building, and maintaining robust, scalable web applications, working across the full stack to deliver high-quality solutions that drive real value. This is a hybrid role with two days a week based in the office. * Design, develop, and maintain web applications using C# .NET (Core/Framework) and React. * Collaborate with cross-functional teams to define, design, and ship new features. * Write clean, scalable, and testable code. * Troubleshoot and debug applications. * Mentor junior developers and contribute to best practices. * 5+ years of experience as a Full Stack Developer. * Strong proficiency in C# .NET (Core) and React. * Solid understanding of REST APIs, SQL/NoSQL databases, and version con
We're looking for a highly skilled Senior Full Stack Developer with strong experience in C# .NET and React to join our growing tech team. You'll play a key role in designing, building, and maintaining robust, scalable web applications, working across the full stack to deliver high-quality solutions that drive real value. This is a hybrid role with two days a week based in the office. * Design, develop, and maintain web applications using C# .NET (Core/Framework) and React. * Collaborate with cross-functional teams to define, design, and ship new features. * Write clean, scalable, and testable code. * Troubleshoot and debug applications. * Mentor junior developers and contribute to best practices. * 5+ years of experience as a Full Stack Developer. * Strong proficiency in C# .NET (Core) and React. * Solid understanding of REST APIs, SQL/NoSQL databases, and version con
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Deep expertise in SAP Integration Suite, including Cloud Integration and API Management.
Deep expertise in SAP Integration Suite, including Cloud Integration and API Management.
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Experience with Java and API testing using Postman.
Experience with Java and API testing using Postman.
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Experience with Java and API testing using Postman.
Experience with Java and API testing using Postman.
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API development and documentation experience.
API development and documentation experience.
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Knowledge of RESTful API development and integration.
Knowledge of RESTful API development and integration.
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RESTful API development
RESTful API development
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Experience with some of the technologies we make use of: Groovy, Python, AWS Serverless (API Gateway, Lambdas), XML, JSON, Open API, virtualisation in general and especially Docker and its eco system, Git, NoSQL products and concepts (Dynamo, column family, etc.)
Experience with some of the technologies we make use of: Groovy, Python, AWS Serverless (API Gateway, Lambdas), XML, JSON, Open API, virtualisation in general and especially Docker and its eco system, Git, NoSQL products and concepts (Dynamo, column family, etc.)
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High proficiency in SSRS, REST API, KPIs, development, integration, and customisation
High proficiency in SSRS, REST API, KPIs, development, integration, and customisation
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Contribute to backend/API testing and assist with security testing initiatives * Strong knowledge of API testing and backend system validation
Contribute to backend/API testing and assist with security testing initiatives * Strong knowledge of API testing and backend system validation
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Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
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Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
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Champion API-first designs and determine best practices for automation tools such as Power Automate Desktop. * Design secure integration layers using Azure services such as API Management, Service Bus, Functions, Logic Apps, and Key Vault. * Advanced experience with Azure integration tools - API Management, Service Bus, Logic Apps, Functions, and Key Vault.
Champion API-first designs and determine best practices for automation tools such as Power Automate Desktop. * Design secure integration layers using Azure services such as API Management, Service Bus, Functions, Logic Apps, and Key Vault. * Advanced experience with Azure integration tools - API Management, Service Bus, Logic Apps, Functions, and Key Vault.
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SharePoint Developer
SharePoint Developer
PPF (Pension Protection Fund)
CR0, Croydon
From £56,000 to £61,500 per annum plus Civil Service pension and other
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
You should be confident working with cloud technologies like Azure, API development and integration, and SharePoint administration.
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Building and maintaining API-driven Java microservices hosted on public cloud infrastructure * Deep understanding of microservices architecture, cloud-native applications, and API development
Building and maintaining API-driven Java microservices hosted on public cloud infrastructure * Deep understanding of microservices architecture, cloud-native applications, and API development