1 to 25 of 108 API Development Jobs in the UK

SoftwareDeveloper(API Development/Backend Node.js, C#, Fullstack) Birmingham, West Midlands (Hybrid 1 day onsite a week) 55k + Benefits Were partnering with a leading enterprise software house in Birmingham that is expanding its engineering team. Theyre looking for a Software Engineer with strong API and backend development experience to work on complex, high-performing systems … CD. Optimise performance, security, and maintainability of backend services. Support occasional front-end integration using React (desirable, not essential). Skills & Experience 4+ years commercial experience in backend/API development. Strong expertise in Node.js and C#. Solid understanding of REST API design and implementation. Experience with cloud computing and CI/CD pipelines. Knowledge of automated testing … a forward-thinking Software engineering team based in Birmingham, focused on quality and innovation, where you will work on high-impact enterprise software projects. Keywords : Software Developer, Backend Developer, API development, Rest Api, Node.js, C#.React, Fullstack, Birmingham, West Midlands To apply, please send your CV to Bethany at or call 0161 438 1177 for more details. Follow More ❯

experience with Spring Boot and core frameworks integral to enterprise software development. A robust understanding of relational databases and SQL is crucial, alongside expertise in traditional web application and API development. Skills and experience with agile, event-based architectures and data streaming technologies is also welcome. The candidate will be joining a team working on a greenfield project that … will be used globally by UMG staff. It will involve use of web technologies, relational databases, API development and integration with other IT systems within UMG. If you are a proactive and experienced Java developer with a passion for leading teams and contributing to the broader development goals of the department, we invite you to apply and … Champion and evangelise best practices Skills and Experience Required Must Have: Proficiency in Java, with a focus on Spring Boot and core enterprise frameworks Strong understanding of enterprise software development and key design patterns Extensive experience with relational databases, SQL and ORM frameworks Extensive experience with unit, integration and automation testing Experience with service-oriented architectures and web-service More ❯

C# Developer - .NetCore, C# C# .NET Developer to write clean reliable code. Core Web API development needed for an excellent, fast paced, innovative tech driven client. Working on real-time payment software you will be working on exciting tech electric vehicle software and joining a small professional, highly talented SW dev team. Expertise in C# .NET. It would … microservices, DevOps working in a clopud AWS environment with exposure to Kubernetes, CI/CD, Containerisation, pipelines, deployment. Writing functioning code, crafting solutions, with the following tech stack: C# development .NET Core Web API development ORM - Linq2DB, Entity framework Core .Net5 Docker, CI/CD Git Agile Coding and programming in C# and .NetCore, .Net5+ developing new … existing systems which are web, microservices. You will be involved writing Nuget packages, developing unit and integration tests, performing code reviews, and debugging systems! Working in an Agile software development environment, working with CI/CD pipeline tech, ORM Technologies, Docker composer, Kubernetes, and cloud AWS/Azure. This an excellent opportunity for someone who has a drive for More ❯

Senior C# Developer - .NetCore, API, NuGet, ORM, Linq2DB Talented, Senior C# .NET Developer to work on a feature rich platform. Developing features modern .NET helping shape the future of sustainable transport. Participate in planning, architecture discussions, code reviews to ensure clean reliable code. Core Web API development needed for an excellent, fast paced, innovative tech driven client. … software and joining a small professional, highly talented SW dev team. Expertise in C# .NET. Experience of enhancing web and microservices systems, AWS, creating managnig internal NuGet packages. C# development .NET Core .Net Core Web API development ORM - Linq2DB, Entity framework .Net5 Docker, CI/CD Git Agile Coding and programming in C# and .NetCore, .Net5+ developing … existing systems which are web, microservices. You will be involved writing Nuget packages, developing unit and integration tests, performing code reviews, and debugging systems! Working in an Agile software development environment, working with CI/CD pipeline tech, ORM Technologies, Docker composer, Kubernetes, and cloud AWS/Azure. This an excellent opportunity for someone who has a drive for More ❯

Stack Developer to join our dynamic team. If you are passionate about technology and thrive in a collaborative environment, we'd love to hear from you. Requirements Responsibilities Web Development: Develop, test, and maintain robust web applications using PHP and other web technologies. Create and manage backend services and ensure seamless data integration. Front-End Development: Develop user … React, , Angular). Ensure cross-browser compatibility and mobile responsiveness. Database Management: Design and maintain databases (MySQL, PostgreSQL, or equivalent). Optimize database queries and perform routine maintenance tasks. API Development and Integration: Develop and integrate RESTful APIs to enhance application functionality. Work with third-party APIs to integrate additional services. Collaboration: Work closely with designers, developers, and … and Experience: Bachelor's degree in Computer Science, Information Technology, or a related field (preferred). Proven experience as a Full Stack Developer with a strong portfolio of web development projects. Technical Skills: Proficiency in PHP and related frameworks (e.g., Laravel, Symfony). Strong knowledge of front-end technologies (HTML, CSS, JavaScript, and modern JavaScript frameworks). Experience with More ❯

NET (C#), Azure Functions, SQL Server, Kafka Relevant Technologies & Tools • Programming Languages: .NET (C#) • Cloud Platform: Microsoft Azure (Azure Functions, Azure Service Bus, Azure DevOps, • ASEv3, Containerisation, K8s, Kafka) • Development Practices: EDA, DDD, K8s, CI/CD pipelines, SOLID principles, REST API • development, Well Architected • Database: SQL Server, Dapper • Tools: Visual Studio, Git, Docker, Azure SDKs Must … Have Qualifications • 10+ years in .NET • Azure DevOps • CI/CD pipelines • SOLID principles • SQL Server • REST API development Nice-to-Have Qualifications • Azure ML, Docker • financial industry experience • experience with design patterns More ❯

Work with the broader Engineering community to develop our data and MLOps capability infrastructure Requirements • Strong experience in software engineering with proficiency in a language such as Python for API development, Data engineering and automation tasks • A background in working with storage solutions such as PostgreSQL, MySQL, and BigQuery • Experience in API development using tools such More ❯

We are currently seeking an experienced Senior Developer to join our established Client Digital Solutions team responsible for the development, implementation, and maintenance of software solutions across both our UK and NL services sectors and our wider international clients. As an experienced Senior Developer, you will become a key member of a core team developing market leading cloud based … digital solutions to our clients. Your Responsibilities: Develop, deploy, test and support cloud applications. Working as part of a dedicated software development team, under the guidance of technical lead members on all aspects of the software development lifecycle Involvement in the development of new external software solutions. Use Microsoft Azure to develop and deploy software solutions in … acceptance criteria are met. Testing and deploying cloud applications using continuous integration, code quality checks and distribution pipelines. Ensuring non-functional requirements including security considerations are met in the development of the solutions. Supporting existing solutions and assisting in their maintenance and support. Providing additional application troubleshooting and support where necessary. Producing suitable end user/technical documentation and More ❯

integrity by implementing robust data management practices. Collaborate with cross-functional teams to support digital transformation initiatives and enhance data-driven decision-making. Contribute to the support and continual development of the data landscape to ensure its optimal performance and availability. Required skills & qualifications: Excellent communication and collaboration skills, with the ability to manage multiple projects alongside ad hoc … Pyspark, R, Java, or Scala. Experience with any of the following would be desirable but not essential; Microsoft's Fabric data platform, Experience with ADF such as managing pipelines, API development, API webhooks, automation. Previous experience working with facilities management datasets. What we offer THE PACKAGE A competitive salary with annual pay reviews. 25 Days holiday plus More ❯

We are looking for a Senior/Lead Front-end JavaScript Developer to join our consulting client. We have multiple locations available In this role, you will lead the development of an impactful web application for a public sector programme, ensuring high performance, scalability, and maintainability. You will work closely with cross-functional teams to deliver engaging solutions that … HTML, CSS & JavaScript Collaborate with architects and other developers to design robust, scalable, and secure architectures for new projects and enhancements to existing systems. Lead and participate in agile development processes, including sprint planning, daily stand-ups, and retrospectives. Conduct thorough code reviews to ensure code quality, performance, and adherence to best practices. Continuously improve our teams' development … the GOV.UK Design System Familiarity with the GOV.UK CASA UI framework Experience with MongoDB and NoSQL variants writing robust and scalable queries and operations Experience with TypeScript and modern development tools and practices. Knowledge of Cloud-Native development on the AWS Platform (IAM, SQS, S3, Secrets Management, KMS). Familiarity with CI/CD pipelines and DevOps practices. More ❯

of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core … geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like to work at HMLR, a Hiring Manager Q&A session where you can virtually 'meet the team' will be held via Teams on … Responsibilities Lead the design, build, and maintenance of complex digital services and APIs Deputise for the Lead Developer, providing technical leadership and mentorship Influence and improve the team's development practices, CI/CD pipelines, and tooling Collaborate with architects and product managers to ensure technical solutions meet user and business needs Take a holistic view of delivery, ensuring More ❯

of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core … geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like to work at HMLR, a Hiring Manager Q&A session where you can virtually 'meet the team' will be held via Teams on … Responsibilities Lead the design, build, and maintenance of complex digital services and APIs Deputise for the Lead Developer, providing technical leadership and mentorship Influence and improve the team's development practices, CI/CD pipelines, and tooling Collaborate with architects and product managers to ensure technical solutions meet user and business needs Take a holistic view of delivery, ensuring More ❯

of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core … geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like to work at HMLR, a Hiring Manager Q&A session where you can virtually 'meet the team' will be held via Teams on … Responsibilities Lead the design, build, and maintenance of complex digital services and APIs Deputise for the Lead Developer, providing technical leadership and mentorship Influence and improve the team's development practices, CI/CD pipelines, and tooling Collaborate with architects and product managers to ensure technical solutions meet user and business needs Take a holistic view of delivery, ensuring More ❯

of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core … geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like to work at HMLR, a Hiring Manager Q&A session where you can virtually 'meet the team' will be held via Teams on … Responsibilities Lead the design, build, and maintenance of complex digital services and APIs Deputise for the Lead Developer, providing technical leadership and mentorship Influence and improve the team's development practices, CI/CD pipelines, and tooling Collaborate with architects and product managers to ensure technical solutions meet user and business needs Take a holistic view of delivery, ensuring More ❯

of developers, testers, product managers and architects to build secure, scalable systems and help guide technical direction across your team. You'll also mentor colleagues and contribute to improving development processes and standards across the Software Development Practice. HMLR's Developers work on a variety of projects that are central to their digital transformation. This includes rebuilding core … geospatial data initiatives, developing new cloud-native services and modernising legacy applications into scalable, containerised solutions. If you would like to find out more about the role, The Software Development profession and what it's like to work at HMLR, a Hiring Manager Q&A session where you can virtually 'meet the team' will be held via Teams on … Responsibilities Lead the design, build, and maintenance of complex digital services and APIs Deputise for the Lead Developer, providing technical leadership and mentorship Influence and improve the team's development practices, CI/CD pipelines, and tooling Collaborate with architects and product managers to ensure technical solutions meet user and business needs Take a holistic view of delivery, ensuring More ❯

you’ll be part of a well-established, collaborative team building a feature-rich platform that’s evolving rapidly as the EV market matures. You’ll contribute to the development and maintenance of a wide range of features using modern .NET technologies, helping shape the future of sustainable transport. We’re seeking someone who writes clean, reliable code, enjoys … solving real-world business problems, and thrives in a global team of skilled professionals. You’ll be encouraged to stay current with emerging technologies, adopt modern development practices, and actively participate in planning, architecture discussions, and code reviews. This role reports to the Team Lead and offers flexibility with either full-time office-based work or a hybrid model … and managing internal NuGet packages Writing robust unit and integration tests Participating in peer code reviews Diagnosing and resolving system issues Qualifications 2–4 years’ commercial experience in C# development Solid understanding of .NET Core and Web API development Experience working in Agile software development teams Familiarity with relational databases and basic knowledge of key-value More ❯

small team dedicated to optimizing client implementations. Responsibilities Integration Management: Take full responsibility for the integration processes between Luminance and external systems, ensuring seamless interoperability and client satisfaction. Technical Development and Client Engagement: Actively participate in both the hands-on development of technical solutions and client interactions to understand their needs. Collaborate with product development teams and … teams to comprehensively understand client requirements and develop appropriate technological solutions in support of these requirements. Architectural Design: Design and implement scalable architectures that facilitate the rapid and efficient development of new third-party connectors. Ensure the system's interfaces, testing protocols, and designs are robust and future-proof. Monitoring and Diagnostics: Enhance system observability and streamline the diagnosis … of technical issues through advanced logging and tracing capabilities, aiding front-line technical staff. API Development and Management: Oversee the development and maintenance of our public-facing API to cater to clients requiring customized connectivity options. This includes managing both REST and event streaming functionalities. Comprehensive Documentation: Develop high-quality documentation for both internal and external More ❯

data pipeline Optimize and monitor BigQuery operations for cost and performance Establish CI/CD practices as we scale from a dozen clients to 100+ within 12 months Platform Development Build API integrations with MMPs and advertising platforms (Python, REST APIs) Contribute to Django backend for client configuration and monitoring Collaborate with data scientists to productionise ML workflows … Experience with cloud data warehouses (e.g. BigQuery, Snowflake, Redshift) Data transformation tools (e.g. dbt) and data quality frameworks (e.g. Great Expectations) Backend Python frameworks (e.g. Django, FastAPI, Flask) for API development Modern data processing libraries (e.g. Polars, DuckDB) Infrastructure-as-Code (e.g. Terraform, Pulumi) and containerization (e.g. Docker) Open source contributions, or conference talks Ad-tech/mobile 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 ❯

and building an internal product suite. You will translate business requirements into robust, scalable, and high-performing software solutions, utilising your expertise to suggest improvements.This is a hands-on development role, and you will be joining an Agile team that host applications in the cloud and on-prem. You will contribute to all stages of the development lifecycle … from design, development, QA and continuous integration. You will have access to modern technologies and the support to expand on your technical repertoire.In the position of Software Developer, you will have the opportunity to work on innovative projects within a supportive and collaborative team environment whilst making a meaningful impact in a growing organisation.For this role, there are hybrid … working options, with the opportunity to work two days per week from home. Key Requirements: C#, .NET Core Experience of the entire software development lifecycle. Agile/Scrum JavaScript SQL Server, ETL processes, System integrations API Development Azure - Beneficial Strong communication skills. Package: Life assurance, pension contributions, Healthcare and wellbeing, Retail Discounts, Cycle 2 Work and many More ❯

Work With: Our client is a leading global technology and engineering solutions company, delivering next-generation digital transformation initiatives. You will work as part of a high-performing Agile development team focused on building a credit decisioning engine powered by scalable microservices and cloud-native solutions. About the Role: As a Java Fullstack Engineer , you will play a pivotal … and frontend features focused on performance and reliability. Work closely with architects and product owners to define and implement technical solutions aligned with business goals. Required Skills & Experience: Backend Development: 8–15 years of experience with Java, Spring Boot , and microservices architecture . Java 17: Hands-on experience is mandatory . DevOps & Cloud: Proven experience with GCP , AWS , or … Azure , and familiarity with CI/CD pipelines . API Development: Expertise in RESTful API design and development. Frontend: Working knowledge of ReactJS or Angular . Testing: Strong background in automated testing , including JUnit . Mindset: Excellent communication skills and a commitment to continuous learning in a collaborative Agile environment. Good to Have: Experience with GCP Data More ❯

Greater Manchester My client is hiring for a .NET Developer to work on new and evolving products used by major UK brands. You will be involved in the full development life cycle, from system design and implementation to deployment and optimisation. This is a hands-on technical role focused on scalable API development, cloud integration, and continuous … Building and maintaining services using ASP.NET Core, C#, MVC, and Razor Designing and integrating RESTful APIs for both internal and third-party systems Writing tested, maintainable code using modern development practices Working across SQL Server for data design and access Collaborating within Agile teams using sprints or Kanban Deploying to cloud platforms (primarily Azure ) using CI/CD pipelines … Requirements 5+ years of .NET development experience , with full-stack exposure Practical experience with ASP.NET Core, C#, Web API, HTML/CSS/JavaScript Strong understanding of software design principles (SOLID, design patterns) Experience with Git , version control workflows, and CI tools Exposure to cloud technologies , ideally Azure (App Services, DevOps, etc.) Bonus if you've worked with More ❯

Lead Developer (Contract, AI-Driven Environment, Node.JS) We’re looking for an experienced backend senior developer to support API development and backend delivery for a high-traffic consumer platform. You’ll work alongside front-end engineers to build scalable, secure, and performant systems using modern tools and AI-assisted development. *6 month, fully remote contract. Outsdie IR35* You … if you: Deliver production-ready APIs fast and independently Have proven experience with consumer-facing platforms Use AI coding tools (Cursor, Claude Code, Codex, or similar) to speed up development Make confident technical decisions with minimal guidance Follow clear architectural standards and established development patterns Understand backend performance, scalability, and security at production scale Build reliable, maintainable APIs … mentoring Anyone without production experience in consumer-facing systems Those who avoid AI coding tools Core Technical Requirements: Node.js (extensive production experience) - this is key, you must have RESTful API design and development (production experience) Database design and optimization (SQL and/or NoSQL) Authentication, authorization, and security best practices AI coding tools (GitHub Copilot, Claude, Cursor, or More ❯

and building an internal product suite. You will translate business requirements into robust, scalable, and high-performing software solutions, utilising your expertise to suggest improvements.This is a hands-on development role, and you will be joining an Agile team that host applications in the cloud and on-prem. You will contribute to all stages of the development lifecycle … from design, development, QA and continuous integration. You will have access to modern technologies and the support to expand on your technical repertoire.In the position of Software Developer, you will have the opportunity to work on innovative projects within a supportive and collaborative team environment whilst making a meaningful impact in a growing organisation.For this role, there are hybrid … work two days per week from home. Please get in touch to discuss the salary bracket for this role. Key Requirements: C#, .NET Core Experience of the entire software development lifecycle. Agile/Scrum JavaScript SQL Server, ETL processes, System integrations API Development Azure - Beneficial Strong communication skills. Package: Life assurance, pension contributions, Healthcare and wellbeing, Retail More ❯

IR35 We are seeking an experienced Full Stack Developer to join our team. The successful candidate will have a proven track record in both front-end and back-end development, with strong skills in Java, Python, and API development. You will be instrumental in building and maintaining scalable, high-quality applications that deliver exceptional user experiences. Day-to … create robust, scalable server-side logic. Implement responsive and visually appealing front-end designs using HTML, CSS, JavaScript, and modern frameworks like React, Angular, or Vue. Design and manage API integrations, ensuring seamless data flow between different software components. Work with SQL and NoSQL databases to store and retrieve application data efficiently. Use version control systems like Git to … Skills & Qualifications: Proven experience as a Full Stack Developer with expertise in both front-end and back-end development. Strong proficiency in Java and Python. Hands-on experience with API development and integration. Solid understanding of HTML, CSS, JavaScript, and modern front-end frameworks (React, Angular, or Vue). Experience with databases (SQL and NoSQL). Familiarity with More ❯