1 to 25 of 185 API Design Jobs in the UK excluding London

up—within a startup-style venture backed by the strength and stability of an established business. Key Responsibilities End-to-end development of high-quality, scalable SaaS platforms from design through deployment and maintenance. Architect and implement robust backend services primarily using Python and PostgreSQL. Develop and maintain responsive, performant front-end applications with TypeScript and modern frameworks (e.g. … development productivity and platform capabilities. Provide technical mentorship and leadership to development teams, fostering best practices in coding, testing, and deployment. Participate in code reviews, architecture discussions, and system design decisions. Troubleshoot and resolve complex technical issues across the full stack. Ensure software security, scalability, and performance are maintained at all times. Keep abreast of emerging technologies and industry … Proven expertise in full-stack development using: TypeScript (and JavaScript frameworks such as NextJS, Node, or Tailwind) Python (including frameworks like Django, Flask, or FastAPI) PostgreSQL and relational database design, optimization, and maintenance. AI Development Tools such as Windsurf, Aider or Augment. Demonstrable experience building and scaling SaaS platforms in a production environment. Strong understanding and practical application of More ❯

enterprise-grade applications for NatWest Group . The ideal candidate will be responsible for designing, developing, and supporting cutting-edge digital solutions aligned with modern development practices. Key Responsibilities: Design, develop, and maintain Java-based applications using Spring Boot and related technologies Collaborate with architects, product owners, and other developers to translate business requirements into technical solutions Write clean … scalability, and security Required Skills & Experience: Strong core Java (Java 8 or above) development skills Proven experience with Spring Boot , Spring MVC, Spring Data JPA, and Spring Security RESTful API design and integration Experience with Microservices architecture Familiarity with Docker , Kubernetes , and CI/CD pipelines Hands-on experience with databases such as PostgreSQL , Oracle , or MongoDB Knowledge More ❯

join a Business Banking Technology team within a leading Tier 1 financial institution. You'll play a key role in enhancing and scaling their digital banking platform. Key Responsibilities Design, build, and maintain robust, scalable applications using Java, Spring Boot, and Angular or React. Collaborate with cross-functional teams to deliver seamless end-to-end features, from user interfaces … Messaging: PostgreSQL, Oracle, MongoDB (optional) Kafka, Redis (for messaging and caching) Requirements Extensive experience in full-stack development with strong expertise in Java and Angular. Solid understanding of REST API design, microservices architecture, and cloud-native development. Hands-on experience with CI/CD pipelines, containerization, and infrastructure as code. Strong grasp of Agile methodologies and collaborative team More ❯

performance reviews, provide constructive feedback, and support the professional development of the engineers. Facilitate effective communication and collaboration within the team and with other departments. Technical Oversight: Oversee the design, implementation, and maintenance of backend systems and services. Ensure the team adheres to best practices in software development, including code reviews, testing, and continuous integration/deployment. Drive technical … Computer Science, Engineering, or a related field. Experience with cloud platforms (e.g., AWS, Azure, Google Cloud) and containerization technologies (e.g., Docker, Kubernetes). Familiarity with microservices architecture and RESTful API design. Strong understanding of database technologies (SQL and NoSQL). Experience with Agile/Scrum methodologies. Soft Skills: Exceptional communication and interpersonal skills. Ability to inspire and motivate a More ❯

join a Business Banking Technology team within a leading Tier 1 financial institution. You'll play a key role in enhancing and scaling their digital banking platform. Key Responsibilities Design, build, and maintain robust, scalable applications using Java, Spring Boot, and Angular. Collaborate with cross-functional teams to deliver seamless end-to-end features, from user interfaces to backend … Messaging: PostgreSQL, Oracle, MongoDB (optional) Kafka, Redis (for messaging and caching) Requirements Extensive experience in full-stack development with strong expertise in Java and Angular. Solid understanding of REST API design, microservices architecture, and cloud-native development. Hands-on experience with CI/CD pipelines, containerization, and infrastructure as code. Strong grasp of Agile methodologies and collaborative team More ❯

B2B marketing platform, Cylvy. It's a unique opportunity to help shape the future of marketing by rapidly translating strategic requirements into intelligent, scalable solutions. Key Responsibilities Solution Architecture: Design scalable, modular architectures for AI-driven marketing applications and microservices. Requirements Engineering: Gather, analyse, and translate business and marketing requirements into detailed technical specifications. AI-Assisted Development: Leverage AI … Git, CI/CD methodologies, and cloud services. MarTech Innovation: Research and implement AI solutions specifically targeting marketing use cases (content generation, audience analytics, personalisation). Data Pipeline Architecture: Design robust data flows between marketing systems and AI services. Technical Leadership: Provide strategic direction, mentorship, and best practices for AI implementation across the team. Documentation: Develop comprehensive technical documentation … Proven experience with AI-assisted development tools (e.g., GitHub Copilot, Amazon CodeWhisperer) and integrating large language models (LLMs) and AI APIs. Deep understanding of microservices architecture, Model Context Protocol, API design, and cloud platforms (GCP, Azure). Skilled in containerisation and orchestration (Docker, Kubernetes), version control (Git, BitBucket), and CI/CD pipelines. Strong foundation in software design More ❯

Key Responsibilities Vibe Coding & AI Tooling: Spend the majority of your time building and iterating using AI-first coding environments (Cursor, VS Code Studio, Copilot, etc.). Solution Architecture: Design scalable, modular architectures for AI-driven marketing applications and microservices. Requirements Engineering: Translate business and marketing needs into detailed technical specifications. AI-Assisted Development: Rapidly prototype and develop applications … using Docker, Git, CI/CD, and cloud services. MarTech Innovation: Research and implement AI solutions for marketing use cases like content generation, analytics, and personalisation. Data Pipeline Architecture: Design robust data flows between marketing systems and AI services. Technical Leadership: Provide strategic direction, mentorship, and best practices for AI implementation. Documentation: Create comprehensive technical documentation for systems and … Proven experience with AI-assisted development tools (e.g., GitHub Copilot, Amazon CodeWhisperer) and integrating large language models (LLMs) and AI APIs. Deep understanding of microservices architecture, Model Context Protocol, API design, and cloud platforms (GCP, Azure). Skilled in containerisation and orchestration (Docker, Kubernetes), version control (Git, BitBucket), and CI/CD pipelines. Strong foundation in software design More ❯

to the .NET development team to ensure delivery of great quality outputs that fully support achievement of the business’s objectives, needs and requirements. Core Responsibilities Front-End Development: Design, develop, and implement front-end applications using Angular and HTML. Back-End Development: Write reusable, testable, and efficient code; develop and maintain server-side logic using .NET. UI/… with an “accessibility for all” mindset. Optimisation: Optimise applications for maximum speed and scalability. Security: Implement security and data protection measures for public-facing applications with a “secure by design” principle. API Design and Management: Design and manage APIs, including versioning and ensuring backwards compatibility for internal and external apps. Project Delivery: Deliver application modules in … Best Practices: Ensure coding is conducted to best practice guidelines to build and maintain a high-quality application suite. Mentor members of the development team in the use of design patterns and the importance of reusable code. Version Control: Manage code versioning properly and participate in code review processes. Technical Discussions: Contribute to discussions on and help guide the More ❯

implementing, and optimizing SaaS applications in a microservices-based environment. As a member of our team, you will contribute to all aspects of the software development lifecycle, including estimation, design, coding, test automation, code reviews, deployment, and support. Teams are responsible for specific services or products. Our solutions help airlines manage safe and high-performance flight operations. Responsibilities: Develop … testing, covering both functional and non-functional aspects Hands-on experience with Python in testing area Applying best practices to keep code maintainable Hands on experience with ASP.NET Web API Experience working with databases and good understanding of Entity Framework Solid understanding of DevOps practices, including CI/CD pipelines (e.g., GitHub Actions, GitLab CI, Jenkins), containerization with Docker … field Proficiency in English spoken and written Nice-to-Haves: Hybrid work environment with up to 2 days working from home weekly Hands-on experience with RESTful/SOAP API design, development, optimization, testing, and security Deep expertise in implementation of automated functional tests using Python Broad and in-depth understanding of software testing concepts and methodologies, including More ❯

implementing, and optimizing SaaS applications in a microservices-based environment. As a member of our team, you will contribute to all aspects of the software development lifecycle, including estimation, design, coding, test automation, code reviews, deployment, and support. Teams are responsible for specific services or products. Our solutions help airlines manage safe and high-performance flight operations. Responsibilities: Develop … testing, covering both functional and non-functional aspects Hands-on experience with Python in testing area Applying best practices to keep code maintainable Hands on experience with ASP.NET Web API Experience working with databases and good understanding of Entity Framework Solid understanding of DevOps practices, including CI/CD pipelines (e.g., GitHub Actions, GitLab CI, Jenkins), containerization with Docker … field Proficiency in English spoken and written Nice-to-Haves: Hybrid work environment with up to 2 days working from home weekly Hands-on experience with RESTful/SOAP API design, development, optimization, testing, and security Deep expertise in implementation of automated functional tests using Python Broad and in-depth understanding of software testing concepts and methodologies, including More ❯

team, you will actively participate in the software development lifecycle. Your primary focus will be on coding, implementing features, and contributing to test automation, while also being involved in design discussions, code reviews, and deployment processes. Teams are responsible for specific services or products. Our solutions help airlines manage safe and high-performance flight operations. Responsibilities: Develop new and … and AWS (or other cloud service providers) Experience writing unit tests, component testing or integration testing Applying best practices to keep code maintainable Hands on experience with ASP.NET Web API Experience working with databases and understanding of Entity Framework Bachelor's Degree in software engineering or a related field Good spoken and written English skills Nice-to-Haves: Hands … on experience with Python in testing area Hands-on experience with RESTful/SOAP API design, development, optimization, testing, and security Solid understanding of DevOps practices, including CI/CD pipelines (e.g., GitHub Actions, GitLab CI, Jenkins), containerization with Docker, and monitoring/logging tools Expertise in implementation of automated functional tests using Python Understanding of software testing More ❯

team, you will actively participate in the software development lifecycle. Your primary focus will be on coding, implementing features, and contributing to test automation, while also being involved in design discussions, code reviews, and deployment processes. Teams are responsible for specific services or products. Our solutions help airlines manage safe and high-performance flight operations. Responsibilities: Develop new and … and AWS (or other cloud service providers) Experience writing unit tests, component testing or integration testing Applying best practices to keep code maintainable Hands on experience with ASP.NET Web API Experience working with databases and understanding of Entity Framework Bachelor's Degree in software engineering or a related field Good spoken and written English skills Nice-to-Haves: Hands … on experience with Python in testing area Hands-on experience with RESTful/SOAP API design, development, optimization, testing, and security Solid understanding of DevOps practices, including CI/CD pipelines (e.g., GitHub Actions, GitLab CI, Jenkins), containerization with Docker, and monitoring/logging tools Expertise in implementation of automated functional tests using Python Understanding of software testing More ❯

across teams. Success in this position requires not only technical proficiency but also excellent interpersonal skills to thrive in an environment that values teamwork, knowledge sharing, and mutual support. * Design, code, test, and deliver software enhancements aimed at improving existing systems by adopting DevOps principles across all cloud database offerings.* Troubleshoot complex incidents efficiently, communicate effectively with stakeholders at … is advantageous for scaling operations smoothly.* Knowledge of leveraging APIs securely along with authentication mechanisms and data structures enhances your ability to integrate systems seamlessly.* Understanding microservice architectures, REST API design/development principles, Docker/Kubernetes containerisation technologies, and CI/CD integration is beneficial. Robert Walters Operations Limited is an employment business and employment agency and More ❯

Principal Engineer - Law Firm 3 days pw in London Lead the design, architecture, and development of innovative technical solutions, with a focus on Microsoft Azure, cloud-native technologies, and microservices architecture.Act as an internal SME across complex business and technology projects, providing expert third-line support and driving resolution of critical incidents.Own and evolve our approach to disaster recovery … experience with a broad tech stack including: C#, JavaScript, Python Azure, Terraform, Kubernetes, Docker CI/CD pipelines (Azure DevOps, GitHub Actions, etc.) Front End frameworks (React, Vue, ASP.NET) API design (REST, JSON, XML) Database experience: SQL, NoSQL, vector databases AI integration: OpenAI, Gemini, and other LLMs Strong knowledge of agile, lean, and DevOps best practices.A collaborative, commercial More ❯

Principal Engineer - Law Firm 3 days pw in London Lead the design, architecture, and development of innovative technical solutions, with a focus on Microsoft Azure, cloud-native technologies, and microservices architecture.Act as an internal SME across complex business and technology projects, providing expert third-line support and driving resolution of critical incidents.Own and evolve our approach to disaster recovery … experience with a broad tech stack including: C#, JavaScript, Python Azure, Terraform, Kubernetes, Docker CI/CD pipelines (Azure DevOps, GitHub Actions, etc.) Front End frameworks (React, Vue, ASP.NET) API design (REST, JSON, XML) Database experience: SQL, NoSQL, vector databases AI integration: OpenAI, Gemini, and other LLMs Strong knowledge of agile, lean, and DevOps best practices.A collaborative, commercial More ❯

ensure you have the tools to meet new challenges. About the Role: OQC are looking for a Senior Software Engineer to join our growing team, developing web-based/api-based solutions for a variety of challenges encountered by our partners and end-users. In this role, you will also develop and maintain critical tools supporting business development and … of large projects and coordinating the work within a team. Strong understanding of common data structures and programming methods. Strong problem solving, troubleshooting and analysis skills. Demonstrated ability to design, develop, and test high-performance distributed systems. Technically versatile and able to learn new skills that you can apply across multiple types of work. Experience with containerised microservices and … deployment in global environment. Strong knowledge of API design, RESTful principles, and microservices architecture. Uphold development standards and prioritize best coding practices. Cloud solutions experience. Desirable skills and experience: Experience in building web applications and working knowledge of one or more of JavaScript/Typescript, HTML, CSS, React/Angular/Node.js. Expertise in Flask web framework. Experience More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

have the opportunity to work across a modern engineering environment, collaborate with agile product teams, and contribute to a high-traffic platform used by millions of customers. Key Responsibilities: Design, build, and maintain scalable, high-performance services using Kotlin or Java Provide technical leadership and mentoring to other engineers in the team Contribute to solution architecture and strategic technical … Skills & Experience 5+ years of back-end development experience using Kotlin or modern Java Expertise in microservice architectures and frameworks like Spring Boot or http4k Deep understanding of RESTful API design and integration Proven experience mentoring engineers and contributing to high-performing teams Familiarity with Agile (Scrum or Kanban), TDD, and pair programming practices Experience with CI/ More ❯

We help our clients to innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design and delivery to operations. This is a Hybrid role working from any of our UK offices (Glasgow, Dundee, Edinburgh and London) 2 days a week. Are you an exceptional … and driving innovation in a dynamic consultancy environment, this is your opportunity to make a massive impact. What you'll do: Lead Backend Architecture: Provide technical leadership, shaping the design and build of advanced, scalable .NET/C# applications (microservices, APIs) with a focus on top-tier code quality and clean architecture. Solve Complex Challenges: Tackle intricate backend architectural … ll bring: Extensive Backend Expertise: Proven track record delivering robust backend systems and APIs, with expert-level proficiency in .NET and C# (.NET Core/5+), ASP.NET Core, RESTful API design, and microservices architecture. Database & Cloud Mastery: Solid understanding of relational databases (SQL Server, PostgreSQL, MySQL) and ORM frameworks (Entity Framework Core), plus experience with cloud platforms (AWS More ❯

on the hunt for 2 experienced Senior Machine Learning Operation Engineers to join our Data Function. You'll play a significant role within our Data Function, working on the design and implementation of machine learning model engineering frameworks, solutions, and best practices. You'll be technically proficient in machine learning and its applications; you'll demonstrate an understanding of … skills Ability to diagnose and troubleshoot problems quickly Excellent problem-solving and analytic skills Powering the business with the right tools What's involved: You'll contribute to the design and implementation of Machine Learning Engineering standards and frameworks. You'll support model development, with an emphasis on auditability, versioning, and data security. You'll implement automated data science … model testing and validation. You'll assist in the optimisation of deployed ML model scoring code in production services. You'll assist in the design and implementation of data pipelines and engineering infrastructure to embed scaled machine learning solutions. You'll use CI/CD pipelines, manage the deployment and version management of large numbers of data science models More ❯

on the hunt for 2 experienced Senior Machine Learning Operation Engineers to join our Data Function. You'll play a significant role within our Data Function, working on the design and implementation of machine learning model engineering frameworks, solutions, and best practices. You'll be technically proficient in machine learning and its applications; you'll demonstrate an understanding of … skills Ability to diagnose and troubleshoot problems quickly Excellent problem-solving and analytic skills Powering the business with the right tools What's involved: You'll contribute to the design and implementation of Machine Learning Engineering standards and frameworks. You'll support model development, with an emphasis on auditability, versioning, and data security. You'll implement automated data science … model testing and validation. You'll assist in the optimisation of deployed ML model scoring code in production services. You'll assist in the design and implementation of data pipelines and engineering infrastructure to embed scaled machine learning solutions. You'll use CI/CD pipelines, manage the deployment and version management of large numbers of data science models More ❯

AWS, Azure, GCP) Proficiency in front end e.g., React, Angular, Vue.js and frameworks such as e.g., Node.js or FastAPI. Experience with databases such as MongoDB and MySQL. Familiarity with API design and development, including serverless technologies, e.g. AWS ECS/API Gateway/Lambda. A passion for space technology and a genuine interest in the space sector More ❯