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104 API jobs in Middlegreen + 20 miles
359 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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Mid-Level Mobile Developer (iOS) Brighton, 4 days per week in office, £50,000-£70,000 DOE - Mid-Level iOS Developer required by a Brighton based Software House. This is a new role which would be perfect for someone looking to build polished, high-performing mobile apps while working in a collaborative, creative environment. * Designing, building, and maintaining iOS applications in Swift * Creating clean, modern UIs with SwiftUI * Applying SOLID principles to write scalable, maintainable code * Working with RESTful APIs to integrate app functionality * Ensuring apps perform smoothly through memory management, multi-threading, and performance optimisation * Collaborating with cross-functional teams on exciting projects * Nice to have: experience with Android development (Kotlin) Our client offers a vibrant office culture and you will have the opportunity to work on div
Mid-Level Mobile Developer (iOS) Brighton, 4 days per week in office, £50,000-£70,000 DOE - Mid-Level iOS Developer required by a Brighton based Software House. This is a new role which would be perfect for someone looking to build polished, high-performing mobile apps while working in a collaborative, creative environment. * Designing, building, and maintaining iOS applications in Swift * Creating clean, modern UIs with SwiftUI * Applying SOLID principles to write scalable, maintainable code * Working with RESTful APIs to integrate app functionality * Ensuring apps perform smoothly through memory management, multi-threading, and performance optimisation * Collaborating with cross-functional teams on exciting projects * Nice to have: experience with Android development (Kotlin) Our client offers a vibrant office culture and you will have the opportunity to work on div
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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.
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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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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Backend Software Engineer C# .Net - Asset Management
Backend Software Engineer C# .Net - Asset Management
Client Server
The City, EC4
£100000 - £150000 per annum + bonus + benefits
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
NEWPREMIUM
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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API integrations with complex systems
API integrations with complex systems
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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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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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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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Knowledge of Microsoft Graph API, Azure AI Foundry, and Copilot integration is a strong plus.
Knowledge of Microsoft Graph API, Azure AI Foundry, and Copilot integration is a strong plus.
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Principal Software Engineer – IOT & FULL-STACK
Principal Software Engineer – IOT & FULL-STACK
Gerrell & Hard
Bicester, Oxfordshire
Unspecified £competitive
Proficiency in API and cloud development (AWS/Azure, MQTT, WebSockets)
Proficiency in API and cloud development (AWS/Azure, MQTT, WebSockets)
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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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4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
4+ years automation testing skills (Selenium, Katalon, GT-UI, GT-API). * Web services testing / API testing skills is a plus.
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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.
FEATURED
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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.
NEWFEATURED
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Cloud Engineer – Oracle Fusion & Cloud Infrastructure
Cloud Engineer – Oracle Fusion & Cloud Infrastructure
EFCI Group Ltd
OX4, Oxford
From £60,000 to £70,000 per annum + £6500 travel allowance + 10% bonus
Familiarity with Oracle Integration Cloud (OIC) and API Gateway configurations.
Familiarity with Oracle Integration Cloud (OIC) and API Gateway configurations.
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Web Developer (Laravel)
Web Developer (Laravel)
Rise Technical
Northampton, Northamptonshire
£26000.00 - £34000.00 per annum + Benefits
*Experience with Git version control and API integration
*Experience with Git version control and API integration
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At the heart of this new application is allowing extensibility via the integration of the Python framework alongside a set of open API's that give access to core functionality of the application. This project would be responsible for proving the early stage integration of our new pre & post processing application and other tooling into a wider workflow by leveraging our initial extensibility framework and API's.
At the heart of this new application is allowing extensibility via the integration of the Python framework alongside a set of open API's that give access to core functionality of the application. This project would be responsible for proving the early stage integration of our new pre & post processing application and other tooling into a wider workflow by leveraging our initial extensibility framework and API's.
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Related Jobs
Locations
- Southwark
- The City, City (EC3)
- The City, City (EC4)
- Euston
- Ireland
- The Borough
- Campden Hill
- Canary Wharf
- Clerkenwell
- Datchet Common
- City of London
- South East London
- Cambridge
- Reading
- Central London
- Milton Keynes
- South West London
- West End
- Abingdon
- North West London
- London
- Berkshire
- Cambridgeshire
- Oxfordshire
- Hampshire
- Surrey
- Buckinghamshire
- Bedfordshire
- East Sussex
- Hertfordshire
- South East
- East Anglia
- East Midlands
- Midlands
- South West