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43 API jobs in Welwyn Garden City + 20 miles
413 exact matches jobs are outside your preferred location
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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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We're looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. * Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis * Proactively maintaining and optimising applications, performing upgrades and configuration changes * Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users * Collaborating closely with engineering and business teams to drive operational excellence * Enhancing processes, documentation, and tooling to support continuous improvement * Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment
We're looking for an experienced Senior Application Support Engineer to join a growing IT team and play a key role in supporting critical business applications across a modern and complex technology stack. * Investigating and resolving technical incidents, ensuring minimal downtime and effective root cause analysis * Proactively maintaining and optimising applications, performing upgrades and configuration changes * Monitoring system performance, defining service-level objectives, and addressing bottlenecks before they impact users * Collaborating closely with engineering and business teams to drive operational excellence * Enhancing processes, documentation, and tooling to support continuous improvement * Proven experience in an application support or support engineering role, within financial services ideally, or another regulated environment
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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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Salesforce Technical Lead London - Location: London (Hybrid) Salary: £85,000 per annum + benefits - Type: Permanent | Full-Time - Recruitment Partner: 167 Solutions Ltd - 167 Solutions Ltd is proud to be working in partnership with a forward-thinking organisation that is investing heavily in its digital transformation. We are seeking an experienced Salesforce Technical Lead to take ownership of the platforms technical direction and play a key role in delivering enterprise-grade Salesforce solutions. This is a hands-on leadership role ideal for someone who enjoys both solution architecture and technical delivery, and wants to shape a scalable Salesforce ecosystem within a growing organisation. Key Responsibilities * Lead the technical design, development and implementation of Salesforce solutions. * Translate business requirements into robust and scalable technical arc
Salesforce Technical Lead London - Location: London (Hybrid) Salary: £85,000 per annum + benefits - Type: Permanent | Full-Time - Recruitment Partner: 167 Solutions Ltd - 167 Solutions Ltd is proud to be working in partnership with a forward-thinking organisation that is investing heavily in its digital transformation. We are seeking an experienced Salesforce Technical Lead to take ownership of the platforms technical direction and play a key role in delivering enterprise-grade Salesforce solutions. This is a hands-on leadership role ideal for someone who enjoys both solution architecture and technical delivery, and wants to shape a scalable Salesforce ecosystem within a growing organisation. Key Responsibilities * Lead the technical design, development and implementation of Salesforce solutions. * Translate business requirements into robust and scalable technical arc
Permanent | Fully Remote (UK) £65,000 - £80,000 + bonus - Key Skills: SQL (T-SQL or PL/SQL) * Unit4 ERP Datasets / Data Dictionary * REST & SOAP Web Services * PowerShell * RERX / ARC / Xtra Reporting - About the Role - We're seeking a technically focused Unit4 Lead Consultant to take ownership of complex solution design, development, and delivery for a leading IT consultancy. This role is hands-on-ideal for someone who thrives on solving technical challenges, building integrations, and optimising data-driven solutions within Unit4 ERP. You'll play a key role in defining technical strategy, developing custom extensions, reports, and integrations, and ensuring solutions are robust, scalable, and high performing. You'll also provide technical direction and guidance to a small team, ensuring best practices and knowledge sharing across projects. What You'll Do
Permanent | Fully Remote (UK) £65,000 - £80,000 + bonus - Key Skills: SQL (T-SQL or PL/SQL) * Unit4 ERP Datasets / Data Dictionary * REST & SOAP Web Services * PowerShell * RERX / ARC / Xtra Reporting - About the Role - We're seeking a technically focused Unit4 Lead Consultant to take ownership of complex solution design, development, and delivery for a leading IT consultancy. This role is hands-on-ideal for someone who thrives on solving technical challenges, building integrations, and optimising data-driven solutions within Unit4 ERP. You'll play a key role in defining technical strategy, developing custom extensions, reports, and integrations, and ensuring solutions are robust, scalable, and high performing. You'll also provide technical direction and guidance to a small team, ensuring best practices and knowledge sharing across projects. What You'll Do
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Location: UK - Rate: £400.00 Outside IR35 - We are seeking a dedicated and technically proficient AI Prompt Engineer to spearhead the development and optimisation of prompts for advanced platforms such as DealCloud, Filament Sifter, and Capsa. The ideal candidate will possess hands-on experience with generative AI technologies, leveraging their skills to significantly enhance user interactions and outcomes. This role involves close collaboration with leading AI vendors to ensure optimal prompt performance and foster innovation. In addition to prompt engineering, the successful candidate will play a vital role in supporting chatbot development and integrating AI-driven insights into enterprise workflows and interactive dashboards, thereby driving efficiency and improving decision-making processes across the organisation.
Location: UK - Rate: £400.00 Outside IR35 - We are seeking a dedicated and technically proficient AI Prompt Engineer to spearhead the development and optimisation of prompts for advanced platforms such as DealCloud, Filament Sifter, and Capsa. The ideal candidate will possess hands-on experience with generative AI technologies, leveraging their skills to significantly enhance user interactions and outcomes. This role involves close collaboration with leading AI vendors to ensure optimal prompt performance and foster innovation. In addition to prompt engineering, the successful candidate will play a vital role in supporting chatbot development and integrating AI-driven insights into enterprise workflows and interactive dashboards, thereby driving efficiency and improving decision-making processes across the organisation.
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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.
Greetings! We are hiringServiceNow UK position in London, UK - Location: London - Band: C1 - 6 Months - We are seeking a highly experienced and visionaryServiceNow Architectwith deep expertise inSource-to-Pay (S2P)andSales & Order Management (SOM)modules. The ideal candidate will lead the architectural design and strategic implementation of scalable, enterprise-grade solutions on the ServiceNow platform, enabling streamlined procurement, supplier lifecycle, and order management processes. * Define and own the end-to-end architecture for ServiceNow solutions across S2P (SLP, SPO, APO) and SOM (Product Catalog, CPQ, Order Management) modules. * Lead technical design sessions, establish architectural standards, and ensure alignment with enterprise IT strategy. * Guide development teams in building robust workflows, integrations, and custom applications using REST/SOAP AP
Greetings! We are hiringServiceNow UK position in London, UK - Location: London - Band: C1 - 6 Months - We are seeking a highly experienced and visionaryServiceNow Architectwith deep expertise inSource-to-Pay (S2P)andSales & Order Management (SOM)modules. The ideal candidate will lead the architectural design and strategic implementation of scalable, enterprise-grade solutions on the ServiceNow platform, enabling streamlined procurement, supplier lifecycle, and order management processes. * Define and own the end-to-end architecture for ServiceNow solutions across S2P (SLP, SPO, APO) and SOM (Product Catalog, CPQ, Order Management) modules. * Lead technical design sessions, establish architectural standards, and ensure alignment with enterprise IT strategy. * Guide development teams in building robust workflows, integrations, and custom applications using REST/SOAP AP
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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
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Jira SME - SC Cleared - Onsite - Inside IR35
Jira SME - SC Cleared - Onsite - Inside IR35
The Bridge (IT Recruitment) Limited
EC1, City of London, EC3M 3BY
£575 - 600 per day
This is a fantastic opportunity to work as a Jira SME on a long term contract, inside IR35. It's important to note that this Jira SME role will require 5 days per week on site in Chippenham and you must have active SC Clearance. * SC Cleared * Defence experience * Provide expertise on Jira Service Management (JSM), Jira Software (JSW), and Confluence * ITSM principles (Incident, Problem, Change, and Request Management). * JSM Automations, Workflows, and Assets (Insight). * Jira Query Language (JQL). * ITIL 4, Agile, or DevOps frameworks. * Familiarity with scripting or automation tools (e.g., PowerShell, Python, or REST APIs). If you do have the relevant experience for this Jira SME role, please do apply.
This is a fantastic opportunity to work as a Jira SME on a long term contract, inside IR35. It's important to note that this Jira SME role will require 5 days per week on site in Chippenham and you must have active SC Clearance. * SC Cleared * Defence experience * Provide expertise on Jira Service Management (JSM), Jira Software (JSW), and Confluence * ITSM principles (Incident, Problem, Change, and Request Management). * JSM Automations, Workflows, and Assets (Insight). * Jira Query Language (JQL). * ITIL 4, Agile, or DevOps frameworks. * Familiarity with scripting or automation tools (e.g., PowerShell, Python, or REST APIs). If you do have the relevant experience for this Jira SME role, please do apply.
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Company Description - At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description - Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies. Working in the Design and Platform Performance domain, you willlead the technology side of web and mobile analytics for a platform with ov
Company Description - At The Stepstone Group, we have a simple yet very important mission: The right job for everyone. Using our data, platform, and technology, we create opportunities for jobseekers and companies around the world to find a perfect match in fair and equitable way. With over 20 brands across 30+ countries, we strive for fair and unbiased hiring. Join our team of 4,000+ employees and be part of reshaping the labour market and becoming the worlds leading job platform. Job Description - Join our team and youll be responsible for providing technical leadership to all engineering and development areas across your domain, developing and executing an engineering strategy aligned to the portfolio and global tech strategies. Working in the Design and Platform Performance domain, you willlead the technology side of web and mobile analytics for a platform with ov
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We are looking for an Engineering Manager (f/m/d) to lead a high-performing, remote-first API development team based in Europe who are driving Contentful's REST and GraphQL APIs that enable customers to manage and deliver content at scale. We aim to help customers accelerate innovation, reduce operational complexity, and unlock new growth opportunities through a secure, performant, and extensible API ecosystem. * Lead and grow a globally-distributed API development team, ensuring a culture of high performance, collaboration, and continuous improvement. * Experience with API-first platforms.
We are looking for an Engineering Manager (f/m/d) to lead a high-performing, remote-first API development team based in Europe who are driving Contentful's REST and GraphQL APIs that enable customers to manage and deliver content at scale. We aim to help customers accelerate innovation, reduce operational complexity, and unlock new growth opportunities through a secure, performant, and extensible API ecosystem. * Lead and grow a globally-distributed API development team, ensuring a culture of high performance, collaboration, and continuous improvement. * Experience with API-first platforms.
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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.
FEATURED
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Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, API Management).
Deep Azure expertise, with M365 ecosystem governance: Power Platform, E5 optimisation, Azure integration services such as Logic Apps, Service Bus, Event Grid, 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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Senior Quality Assurance Engineer
Senior Quality Assurance Engineer
Alexander Edward James Consulting Limited
EC2, City of London
From £60,000 to £80,000 per annum
Build and expand API-level test coverage for distributed and event-driven services.
Build and expand API-level test coverage for distributed and event-driven services.
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Expertise in open-source frameworks, API-led design, and secure, scalable architectures.
Expertise in open-source frameworks, API-led design, and secure, scalable architectures.
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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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Software Engineer - JavaScript / React / Typescript / Node
Software Engineer - JavaScript / React / Typescript / Node
Inspire People
Central London, London, WC2N 5DN
£600 - £700 per day + Inside IR35
Experience with building and maintaining RESTful API's using Node.js. Developing and maintaining applications in serverless environments using distributed architecture and AWS tools including Lambda, API Gateway, S3, Cognito & RDS.
Experience with building and maintaining RESTful API's using Node.js. Developing and maintaining applications in serverless environments using distributed architecture and AWS tools including Lambda, API Gateway, S3, Cognito & RDS.
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Strong experience with Python and API frameworks (FastAPI, Flask, etc.)
Strong experience with Python and API frameworks (FastAPI, Flask, etc.)
FEATURED