1 to 25 of 114 API Development Jobs in the UK excluding London

as a specialist consultant, working on a wide array of complex projects across multiple industries. The Role: We are looking for a Software Engineer with a strong foundation in API development and C# to join our data engineering team in a highly regulated industry. In this role, youll be instrumental in designing and building scalable, secure software systems … with strict regulatory standards. Were seeking candidates with over 5 years of relevant experience, a solid understanding of software system design, and a strong command of C# and modern API development patterns. A background in working with data systems, cloud integrations, and secure, large-scale applications will be highly advantageous. Responsibilities: Design, develop, and maintain scalable APIs and … decisions, and system documentation. Stay current with best practices and emerging technologies in software engineering and data systems. Skills & Experience: You will have the following skills or proven experience: API Development: Proven experience designing and building RESTful APIs and services at scale. Experience with authentication, authorization, and secure API communication (OAuth2, JWT, etc.). Familiarity with API More ❯

Senior Software Engineer/Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines is required for a well-established company based in Bedford, Bedfordshire. TWO JOBS AVAILABLE WOULD YOU LIKE TO HELP SHAPE THE FUTURE OF THE COMPANYS TECHNOLOGY? If you can design … Will Apply JOB TYPE: Full-Time, Permanent JOB OVERVIEW We have a fantastic new job opportunity for a Senior Software Engineer/Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines. Working as a Senior Software Engineer/Software Developer youll design and … ensuring technical concepts are understood by all stakeholders CANDIDATE REQUIREMENTS Proven experience with Azure cloud services (App Services, Functions, SQL Database), identity & access, and infrastructure as code Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines Solid understanding of secure coding practices and compliance in SaaS environments More ❯

Senior Software Engineer/Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines is required for a well-established company based in Bedford, Bedfordshire. TWO JOBS AVAILABLE WOULD YOU LIKE TO HELP SHAPE THE FUTURE OF THE COMPANY’S TECHNOLOGY? If you can … Will Apply JOB TYPE: Full-Time, Permanent JOB OVERVIEW We have a fantastic new job opportunity for a Senior Software Engineer/Software Developer who has proven software application development experience across the stack C#, ASP, .NET, Blazor, API Development, Microservices, Containers and Deployment Pipelines. Working as a Senior Software Engineer/Software Developer you’ll design … ensuring technical concepts are understood by all stakeholders CANDIDATE REQUIREMENTS Proven experience with Azure cloud services (App Services, Functions, SQL Database), identity & access, and infrastructure as code Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines Solid understanding of secure coding practices and compliance in SaaS environments More ❯

driven solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly Markets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we're building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You'll Be Doing: You'll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you'll work cross-functionally to turn strategy into More ❯

driven solutions that transform digital marketing? Want a better work-life balance with our groundbreaking 4 day week model? We are seeking a Senior Backend Developer to support the development of our AI-driven marketing platform, with a strong focus on performance, scalability, and data pipeline architecture. This role is ideal for someone experienced in backend API development … founder of SkyScanner. Profits with Purpose - 10% of profits donated to 1moreChild orphanage yearly Markets: Marketing & eCommerce Agencies. eCommerce retailers. Your Expertise: Highly experienced Developer with experience of backend API development and working with modern data infrastructure. At ASK BOSCO® , part of Modo25, we're building a smarter, faster, people-first marketing tech business. We're entering a … of key technical decisions, mentor a talented team of developers, and help build a culture of engineering excellence. What You'll Be Doing: You'll support the design and development of scalable Python applications that power our AI-driven marketing platform. From architecting robust systems to guiding our technical roadmap, you'll work cross-functionally to turn strategy into More ❯

latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build cloud-native … to power next-generation applications. You’ll collaborate closely with engineering peers, architects, and product owners to bring business ideas to life while contributing to the overall architecture and development best practices of the team. You’ll also support the deployment and operationalization of code using CI/CD pipelines and infrastructure-as-code practices. What will you be … doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security best practices to safeguard API More ❯

latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build cloud-native … to power next-generation applications. You’ll collaborate closely with engineering peers, architects, and product owners to bring business ideas to life while contributing to the overall architecture and development best practices of the team. You’ll also support the deployment and operationalization of code using CI/CD pipelines and infrastructure-as-code practices. What will you be … doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security best practices to safeguard API More ❯

latest trends in Audit delivery. Why Join KPMG As a Senior Python Developer As a Senior Python Developer, you will play a hands-on role in the design and development of secure, scalable, and high-performance backend services that drive key components of the audit technology landscape. You will develop integrations with internal and external APIs, build cloud-native … to power next-generation applications. You’ll collaborate closely with engineering peers, architects, and product owners to bring business ideas to life while contributing to the overall architecture and development best practices of the team. You’ll also support the deployment and operationalization of code using CI/CD pipelines and infrastructure-as-code practices. What will you be … doing Backend Development: Develop, test, and maintain Python-based backend services, leveraging asynchronous programming and multithreading to optimize performance and scalability where appropriate. API Integration: Develop, document, and consume RESTful APIs, including integration with Microsoft Graph APIs and other third-party systems. Security Compliance: Implement robust authentication and authorization mechanisms and enforce security best practices to safeguard API More ❯

data-rich dashboards , and intuitive user experiences ? We're looking for a skilled Full-Stack Developer who thrives at the intersection of geospatial data, modern web technologies, and backend API development. ?? Tech Stack You'll Work With: Database: PostgreSQL + PostGIS Backend: Node.js, Python, .NET (or equivalent) API development Frontend: JavaScript, Mapbox GL JS, Leaflet, OpenLayers UX … and user experience for map-based applications Supporting deployment and version control using Azure DevOps ? What We're Looking For: Proven experience in front-end mapping libraries and backend API development Strong understanding of spatial data and geospatial queries Ability to work across the stack and communicate effectively with technical and non-technical stakeholders Experience with interactive data More ❯

building, and maintaining databases to ensure data is readily available, reliable, and efficient for various purposes, including data science and business intelligence. This will also include developing and maintaining API integrations with systems to extract and load data into the database. The role will also be responsible for designing, developing, and maintaining interactive Power BI dashboards using advanced SQL … security, and performance. Build and maintain ETL (Extract, Transform, Load) pipelines to automate the movement and transformation of data from multiple sources into a central database. Develop and maintain API integrations with business systems to ensure seamless, reliable, and timely data ingestion. Analyse, mine, and process internal data using datasets from business systems to deliver validated outputs. Ensure all … database querying, optimisation, and Power BI data modelling. Proficiency in Python for data manipulation, automation, and advanced analytics. Experience designing and implementing ETL processes and data pipelines. Experience with API development and integration for data ingestion. Ability to analyse, model, and interpret data, including identifying trends and patterns in complex datasets. Familiarity with programming principles to support automation More ❯

major integration project within a high-integrity engineering environment. Our client, a respected UK leader in mission-critical software and systems, is seeking a capable contractor to assist with API development and systems integration involving Oracle and internal platforms. This role requires a proactive engineer who can take ownership of specific, well-defined technical tasks. Key Skills Required … on experience with Atlassian tools (Jira, Confluence) Strong PowerShell scripting skills Solid knowledge of SQL Server or similar relational databases Experience working with or integrating Oracle systems Familiarity with API development and integration Ability to work independently and efficiently on scoped tasks UK nationality is essential due to project requirements Experience in regulated sectors is beneficial (e.G. Defence More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

Scrum ) and thrive in a fast-paced, dynamic setting. They should have a keen interest in emerging technologies , staying ahead of industry trends, and be committed to continuous skill development . A professional and approachable demeanor is key, as is the ability to champion the adoption of innovative technologies within the team. Experience Good knowledge of Microsoft development technologies Visual Studio 2022 onwards Strong C#/.NET experience Net/.Net Core Web API development experience API documentation generation tools Experience using IoC containers SQL Server experience Experience using Entity Framework OOAD skills and good understanding of Design Patterns and Practices Web services (SOAP and/or WCF) Unit testing/Test Driven Development Distributed WinForms systems development Desirable Familiarity with DevOps tools for managing work items and source control, with TFS experience being a plus. Alternatively, experience working in a source-controlled, continuous integration (CI) environment. Background in the finance or pensions sector, with an understanding of industry-specific requirements and practices. Proficient in SQL Server query optimisation, including performance tuning More ❯

Are you an experienced .Net (C#) Developer, with some solid experience in API development , looking to take on your next Software Engineering role in a growing SaaS product company Keen to grow your technical skills around .Net 8/C#/API & MySQL development & look into new Generative AI/LLM dev' tools, too? If yes … you’d like to join a growing, recently invested in, actually bringing offshore, back onshore, UK Software company – we’d like to speak with you! Job title: .Net (C#) API Developer Location: Banbury, Oxfordshire. Hybrid working: 2 office days per week, 3 from home, flexible. Salary: ~£50K Basic + Benefits package. We can be somewhat flexible though - so please … team. Our desired "list of stuff" that you should demonstrate experience, below. But basically, if you have solid experience in .Net (C#) & solid experience in ASP.Net core WebAPI (RESTful API), then we'd like to hear from you! - C# and .NET Core. - ASP.NET Core MVC and Web API. - Extensive use of Entity Framework Core and LINQ for data access More ❯

Are you an experienced .Net (C#) Developer, with some solid experience in API development , looking to take on your next Software Engineering role in a growing SaaS product company ? Keen to grow your technical skills around .Net 8/C#/API & MySQL development & look into new Generative AI/LLM dev' tools, too? If yes … you’d like to join a growing, recently invested in, actually bringing offshore, back onshore, UK Software company – we’d like to speak with you! Job title: .Net (C#) API Developer Location: Banbury, Oxfordshire. Hybrid working: 2 office days per week, 3 from home, flexible. Salary: ~£50K Basic + Benefits package. We can be somewhat flexible though - so please … team. Our desired "list of stuff" that you should demonstrate experience, below. But basically, if you have solid experience in .Net (C#) & solid experience in ASP.Net core WebAPI (RESTful API), then we'd like to hear from you! - C# and .NET Core. - ASP.NET Core MVC and Web API. - Extensive use of Entity Framework Core and LINQ for data access More ❯

public holidays observed in the Republic of Ireland. Mandatory Requirements (Pass/Fail): ü Experience Level: The candidate must have more than 7 years of relevant Java/JEE Development experience at a senior level. ü Availability: The candidate must be available to commence work from 3rd November 2025. ü English Language Proficiency: The candidate must be fluent in … both spoken and written English. The following non-exhaustive list of Key Deliverables are applicable to this Role: Expert in Java development, with experience using industry-standard frameworks, e.g. Quarkus/Spring Boot. Microservice and API development (RESTful, experience of REST design and implementation). understanding of API security protocols Knowledge of Kubernetes, API managers … and WebLogic. Experience with OpenShift Container platform, 3scale API and KeyCloak. Testing frameworks and TDD (like Cucumber or Junit). Databases: Relational (Oracle). Coding in adherence to the standards of the application in question. Maintaining, tuning and repairing applications to keep them performing according to technical and functional specifications; performing preventive maintenance activities; providing user support. Integration of More ❯

you a passionate Software Engineer looking to make a real impact? At Car Benefit Solutions, we're on the lookout for a talented developer to join our dynamic Web Development team. As a Software Engineer, you will play a key role in shaping the future of our technology solutions. In this role, you will design, develop, and maintain various … software applications, ensuring that our systems run smoothly and meet the needs of our clients and internal teams. You will be involved in the back-end development, working with our Agile teams to deliver high-quality software solutions. You will collaborate closely with our wider Software Services Team to translate user requirements into technical specifications and will proactively contribute … to the continuous improvement of our software development processes. If you are passionate about software development and are looking for an opportunity to make a real impact, we would love to hear from you! The salary banding for this role is £40,000- £45,000 per annum. The working hours are 35 hours per week, from Monday to More ❯

seasoned AI expert ready to take your skills to the next level? Do words like Azure OpenAI, Cognitive Services, prompt engineering, Retrieval-Augmented Generation (RAG) architectures, vector stores, and API integrations make you light up inside? If so, we want to hear from you! At 1st Central , we're on an exciting journey with AI and Generative AI - and … s about bringing smart ideas to life and making a real impact. You'll be at the heart of our AI strategy - from initial concept and prompt design, through development and testing, to deployment, production, monitoring and continuous improvement optimising cutting-edge AI solutions across the business. One day you might be collaborating with our Data Scientists, Software Engineers … or save time-and you know how to turn those ideas into working solutions. What's involved: Lead the design and implementation of AI engineering frameworks and standards, emphasising API integrations, Azure infrastructure, and Azure security & networking. Architect and develop AI and Generative AI solutions using services like Azure OpenAI and Azure Cognitive Services Implement prompt engineering techniques and More ❯

seasoned AI expert ready to take your skills to the next level? Do words like Azure OpenAI, Cognitive Services, prompt engineering, Retrieval-Augmented Generation (RAG) architectures, vector stores, and API integrations make you light up inside? If so, we want to hear from you! At 1st Central , we're on an exciting journey with AI and Generative AI - and … s about bringing smart ideas to life and making a real impact. You'll be at the heart of our AI strategy - from initial concept and prompt design, through development and testing, to deployment, production, monitoring and continuous improvement optimising cutting-edge AI solutions across the business. One day you might be collaborating with our Data Scientists, Software Engineers … or save time-and you know how to turn those ideas into working solutions. What's involved: Lead the design and implementation of AI engineering frameworks and standards, emphasising API integrations, Azure infrastructure, and Azure security & networking. Architect and develop AI and Generative AI solutions using services like Azure OpenAI and Azure Cognitive Services Implement prompt engineering techniques and More ❯

Axway API Developer + 6 month initial contract + Full remote + £650 to £690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

Axway API Developer + 6 month initial contract + Full remote + 650 to 690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

Axway API Developer + 6 month initial contract + Full remote + £650 to £690 per day + SC Cleared role Key Skills: + Axway API Development/Administration + SC Clearance Responsibilities Designing, developing and deploying of Axway policies and containers using Axway Policy Studio v7.7 Working with DevOps toolset for develop and maintain Automated Testing … and Code Deployment Provide Assistance to Axway support team to resolve technical issues Administrating the Axway Environment, using Axway Policy Studio, Axway API Manager, Cassandra and API Gateway for Deployment of Axway Patches, monitor capacity, providing service improvements Liaise with customers to define project requirements, document and design solutions Knowledge of: SFTP HTTPS SSL/TLS oAuth JSON More ❯

chance to build technology that truly makes an impact.Your role will involve: Expanding and maintaining a serverless payment processing platform built with TypeScript, Node.js, and AWS services like Lambda, API Gateway, and DynamoDB. Ensuring continued PCI DSS compliance across the full development lifecycle, including patching, error tracing, and applying secure coding practices. Designing secure, well-documented service interfaces … and abstractions over external APIs used by our clients. Participating in Agile ceremonies, collaborating closely with engineering, infrastructure, and external service providers. Practising Test-Driven Development (TDD) and Behaviour-Driven Development (BDD) to maintain a high standard of code quality, resilience, and performance. We are looking for candidates who have: Strong hands-on experience with TypeScript and Node.js … for backend development. Deep understanding of AWS serverless technologies. Working knowledge of Infrastructure-as-Code tools. Strong background in RESTful API development, secure authentication mechanisms, and API integration best practices. Experience working in regulated environments such as PCI DSS, or within other compliance-heavy systems. Familiarity with frontend frameworks like React is a bonus. If you're More ❯

streamlines compliance, enhances conversion, and improves the overall student experience. How youll spend your day As a Full Stack Lead Engineer, you will be responsible for leading the design, development, and maintenance of scalable, high-performance applications across both frontend and backend systems. You will collaborate closely with product managers, designers, and other engineers to deliver features that create … enjoys solving complex technical challenges. Youll also be expected to actively explore, evaluate, and adopt the latest Generative AI tools and practices to enhance productivity, streamline workflows, and accelerate development across the engineering team. Lead full stack development using ReactJS, TypeScript, Node.js , and related technologies. Architect and implement robust, scalable, and secure APIs and web applications. Collaborate with … and enforce coding standards, best practices, and documentation. Identify and resolve complex performance, scalability, and reliability challenges. Contribute to DevOps processes (CI/CD, monitoring, infrastructure) and help optimize development pipelines. Participate in architecture discussions and influence the future direction of the platform. Investigate and adopt new technologies (e.g. WASM, serverless patterns) to continually improve the platform. What youll More ❯

Development Team Leader Ipswich Full-time, Permanent £60,000 – £65,000 Hybrid (3 days in office) An exciting opportunity has arisen for a Development Team Leader to join a forward-thinking organisation in the professional services sector. This role is ideal for a hands-on technical leader with a strong background in software development, Agile delivery, and … practices, including Scrum, Azure DevOps, and CI/CD Implement and maintain high-quality software using .NET, C#, React/JavaScript, and automation frameworks. Design and manage microservices and API-driven architecture. Promote continuous improvement, innovation, and technical excellence. Key Requirements Proven experience leading or mentoring a software development team. Full lifecycle product development expertise Strong knowledge … of: .NET, C#, React/JavaScript Azure DevOps, pipelines, and automated testing frameworks Microservices architecture and custom/3rd party API development M365 technologies (Power Automate, Logic Apps, Canvas Apps) Interested? If you're a tech-savvy leader ready to drive innovation and mentor a talented team, we’d love to hear from you. Apply now to be More ❯