1 to 25 of 73 Permanent API Design Jobs in the UK excluding London

Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 Join a Service Modernisation team driving AI-first software development in financial services. This … development tools (e.g. Claude Code, GitHub Copilot, LLMs) Experience with MCP, AI automation, or agentic AI systems Strong understanding of microservices and API design Java/Microservices/API design/LLMs/AI/Claude Code/Copilot ...

possess a combination of some of the following skills, then LETS TALK! Experience in Java development Backend cloud-based application development Understanding of API design for mobile applications with event-driven architecture Strong analysis and problem-solving skills Preferred - Experience of building distributed scalable microservices using Java/… Kotlin, Spring Boot, OAuth 2.0, Secure API design A working understanding of technologies/areas: AWS, API Design, Automation testing In return, you will be rewarded with a highly competitive benefits package including a bonus and ongoing career development and training. What you need ...

infrastructure or DevOps transition role . The successful candidate will already identify as an integration engineer and be comfortable discussing integration patterns, API design, security, error handling, and modular architecture, as well as collaborating closely with technical and non-technical stakeholders. You will contribute to major transformation programmes … while also helping to shape integration standards, patterns, and best practices within a regulated environment . Key Responsibilities Design, build, and support API-led, event-driven, and batch integrations across AWS and Azure Work closely with business analysts, software engineers, solution architects, and QA to translate business requirements ...

Senior Azure API Engineer Outside IR35 | £550-750/day | Remote/Hybrid UK You must have the right to work in the UK The Role Lead the design and delivery of enterprise-grade API solutions on Azure. You'll architect scalable, secure API platforms that … Platform team, you'll build the critical integration layer connecting internal teams and external customers to consistent, reliable data services. What You'll Do Design and operationalise a lean, zero-trust API platform on Azure API Management Architect microservices and event-driven integration flows at scale Define ...

shaping Meteor's digital future. Key Responsibilities Lead, mentor, and inspire a team of developers, fostering a culture of technical excellence and continuous improvement Design, develop, and maintain high-quality software solutions across the full stack Architect and implement systems using .NET, JavaScript, SQL, and modern frontend frameworks Oversee … API design and integrations, ensuring secure and efficient data exchange Translate business and stakeholder requirements into clear technical solutions Conduct code reviews and ensure adherence to coding, security, and quality standards Drive continuous improvement in development workflows, testing, and deployment practices Support the professional development of team members ...

Role Title: Business Analyst - API Payments Umbrella rate: £350 - £385/Day Location: Knutsford Duration: 12 Months Days on site: 2-3 We are seeking a highly skilled Payments Business Analyst with strong experience in API integration and a solid understanding of the Payments domain. The ideal candidate … will act as a bridge between business stakeholders and technical teams, ensuring seamless delivery of payment solutions and API-driven integrations. Key Responsibilities * Requirements Gathering & Analysis o Collaborate with business stakeholders to understand payment workflows, transaction processing, and integration needs. o Document functional and non-functional requirements for APIs ...

user stories, technical approaches, and delivery estimates. Contribute to and help shape roadmaps and delivery plans, balancing business priorities, technical constraints, and engineering effort. Design, develop, and maintain backend services and REST APIs using PHP (Laravel v10). Own and evolve Elasticsearch implementations, including index design, mappings, query … optimisation, aggregations, and performance tuning. Design and optimise MySQL schemas and queries for high-volume workloads, including indexing strategies and query performance analysis. Build and maintain data ingestion and processing pipelines from multiple internal and external sources. Design microservices and distributed systems supporting search, analytics, and alerting ...

intersection of knowledge graphs, real-time IoT data, and enterprise integration—building infrastructure that thousands of businesses will depend on. What You'll Own Design the framework that supports multiple partnership and customer models: Deep Embedded (white-label components), Best-of-Breed SaaS (standalone platform with APIs), Data Layer … Only (predictions via API) Evaluate architectural tradeoffs across complexity, risk, scalability, time-to-market, and value capture for each pattern Make build vs. buy decisions: direct API integrations vs. iPaaS middleware vs. embedded agents Define authentication strategies across OAuth 2.0, certificate-based auth, and federated identity for different ...

tech who wants hands-on experience with cloud architectures and AI integration in a fast-paced environment. What You’ll Be Doing Feature Development & API Design You will design, develop, and maintain scalable web applications for both frontend and backend. This includes building robust RESTful APIs (using … logical and methodical approach to complex technical challenges. Version Control: Proficiency with Git and GitHub (branching, merging, and PRs). Documentation: Code commenting and design/architecture/maintenance documents. Knowledge & Experience Professional Background: 0-3 years of professional experience in full-stack development (or equivalent academic experience). ...

agents that accelerate content production while maintaining brand consistency and localization. The company is a proud member of the MACH Alliance, advocating for modern, API-first, cloud-native technologies. Role Key Responsibilities Technical Leadership - Provide technical direction throughout the software development lifecycle and aligning to internal best practices. Hands … experience). CI/CD Proficiency – Deep knowledge of the software development lifecycle, including automation best practices and CI/CD tools. Scalable System Design – Experience building and maintaining scalable, highly available systems, employing industry-standard patterns and methodologies. API Design – Familiar with REST and GraphQL API ...

will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important. Responsibilities Working in a team of Front-End engineers Writing clear & concise code Working closely with Back-End engineers Participate … architecture design code reviews API design with the Back-End engineers and other team members to establish more functional, cohesive code Create, maintain documentation while implementing the best coding practices standards Hands-on approach Participation in sprint rituals What you’ll need 6+ years experience developing large ...

delivering scalable, high-performance applications. This role requires deep technical expertise, strong architectural skills, and the ability to collaborate effectively across teams. Key Responsibilities Design, develop, and maintain robust full-stack applications and services. Architect and implement scalable cloud-based solutions leveraging AWS . Optimise system performance, reliability … Node.js . Proven experience with AWS and cloud-based architectures. Full-stack proficiency with modern frameworks (e.g., React). Solid understanding of software architecture, design principles, and microservices. Experience with serverless architecture, containers (Docker, Kubernetes), and CI/CD pipelines. Excellent problem-solving, debugging, and communication skills. Preferred Qualifications ...

automation, and continuous improvement-and they're looking for someone who shares that mindset. Key responsibilities as the Senior Back-End Software Engineer are: Design and develop backend services using Node.js and TypeScript , deployed in a cloud-native environment. Build and maintain GraphQL and REST APIs to support … team. Skills & Experience needed: Essential: Strong experience with Node.js and TypeScript Proven background in microservices architecture Solid understanding of GraphQL and RESTful API design Experience with SQL and NoSQL databases Familiarity with CI/CD, automated testing, and modern development workflows Desirable: Experience with Azure or other cloud ...

modern CMS ecosystem. Key Responsibilities: Architect, build, and maintain full-stack applications using TypeScript, React, and Node.js. Provide technical direction by contributing to design decisions, architectural options, and solution trade-offs. Lead improvements to automated testing practices, ensuring robust unit, integration, and E2E test coverage. Drive enhancements … Node.js, React, and Next.js. Professional experience with cloud platforms (AWS preferred). Experience with automated testing and CI/CD pipelines. Understanding of RESTful API design, microservices, and modern web application architecture. Experience with mentoring junior and mid-level engineers. Excellent collaboration, problem-solving, and communication skills, with ...

technical leadership role where youll set direction, define standards, and ensure high-quality delivery. Youll work closely with clients and cross-disciplinary teams to design innovative cloud solutions, while mentoring colleagues and sharing best practices across the organisation. What Youll Be Working On: Design, deploy, and maintain cloud … such as Cloud Functions, Cloud Run, GKE, Compute Engine, VPCs, Cloud Spanner, Cloud SQL, and BigQuery Strong knowledge of microservices, event-driven architectures, and API design Experience with CI/CD pipelines, infrastructure as code (Terraform), and automated testing Competence in scripting or programming (Python, Bash, Node.js) Familiarity ...

seeking an experienced Senior Frontend/Full Stack Engineer to lead the design, development, and delivery of high-quality web applications. This role is frontend-focused, with responsibility for shaping UI architecture, driving engineering standards, and contributing to backend services where appropriate. You will work closely with product … design partners while providing technical leadership across the engineering team. Key Responsibilities Lead the design and implementation of complex, scalable frontend architecture using modern JavaScript frameworks. Own the frontend technical direction, ensuring performance, accessibility, and maintainability at scale. Collaborate with product managers, designers, and engineers to translate requirements ...

About the Role We're looking for a Technical Lead with deep expertise in the Microsoft technology stack to lead the design, development, and delivery of robust software solutions. This role combines hands-on technical leadership with mentorship and strategic oversight - ideal for someone who thrives at the intersection … architecture, coding, and team enablement. Key Responsibilities Lead technical design and development across projects built on the Microsoft stack (e.g., .NET Core, C#, Azure, SQL Server). Architect scalable, secure, and maintainable solutions aligned with business goals and best practices. Guide and mentor developers , performing code reviews and fostering ...

join a collaborative environment where clean code, Test Driven Development and strong engineering principles are at the core of delivery. What you'll do Design, develop and maintain backend applications and RESTful APIs using Java and Spring Boot Follow Test Driven Development practices to ensure robust and maintainable code … using Docker and work within cloud-based environments Collaborate closely with Frontend, QA and DevOps teams to deliver complete solutions Participate in code reviews, design discussions and agile ceremonies Optimise application performance, scalability and security What you'll bring Strong hands-on experience with Java (23+) and Spring Boot ...

practice methodologies, designing and delivering innovative, automated solutions to complex challenges. Interpret and apply security policies, ensuring all implemented solutions meet required security standards. Design and implement highly available, scalable, and resilient systems. Desirable Skills and Technologies Proven experience with cloud platforms, including AWS, Azure, and Azure Virtual Desktop. … Experience deploying applications within cloud architectures, Hands-on experience with web application services. Familiarity with Test-Driven Development and Behaviour-Driven Development Experience in API design, development, and integration. Knowledge of monitoring and observability systems. Understanding of modern digital delivery processes and agile methodologies. Working knowledge ...

practice methodologies, designing and delivering innovative, automated solutions to complex challenges. Interpret and apply security policies, ensuring all implemented solutions meet required security standards. Design and implement highly available, scalable, and resilient systems. Desirable Skills and Technologies Proven experience with cloud platforms, including AWS, Azure, and Azure Virtual Desktop. … Experience deploying applications within cloud architectures, Hands-on experience with web application services. Familiarity with Test-Driven Development and Behaviour-Driven Development Experience in API design, development, and integration. Knowledge of monitoring and observability systems. Understanding of modern digital delivery processes and agile methodologies. Working knowledge ...

maintain code quality and catch regressions early. Identifying, prioritising, and addressing technical debt as part of ongoing development. Contributing to UI/UX design, from wireframes and prototypes to polished interfaces. Taking part in DevOps-adjacent work (e.g. CI/CD workflows in GitLab, deployment automation). Actively contributing … system design discussions, research, and proofs-of-concept as we plan an overhaul of the system. Collaborating with a multidisciplinary team (electronics, production, integrated systems) to make sure software and hardware work well together. About The Applicant An experienced developer who can work independently on production systems, balancing delivery ...

practice methodologies, designing and delivering innovative, automated solutions to complex challenges. Interpret and apply security policies, ensuring all implemented solutions meet required security standards. Design and implement highly available, scalable, and resilient systems. Desirable Skills and Technologies Proven experience with cloud platforms, including AWS, Azure, and Azure Virtual Desktop. … Experience deploying applications within cloud architectures, Hands-on experience with web application services. Familiarity with Test-Driven Development and Behaviour-Driven Development Experience in API design, development, and integration. Knowledge of monitoring and observability systems. Understanding of modern digital delivery processes and agile methodologies. Working knowledge ...

practice methodologies, designing and delivering innovative, automated solutions to complex challenges. Interpret and apply security policies, ensuring all implemented solutions meet required security standards. Design and implement highly available, scalable, and resilient systems. Desirable Skills and Technologies Proven experience with cloud platforms, including AWS, Azure, and Azure Virtual Desktop. … Experience deploying applications within cloud architectures, Hands-on experience with web application services. Familiarity with Test-Driven Development and Behaviour-Driven Development Experience in API design, development, and integration. Knowledge of monitoring and observability systems. Understanding of modern digital delivery processes and agile methodologies. Working knowledge ...

practice methodologies, designing and delivering innovative, automated solutions to complex challenges. Interpret and apply security policies, ensuring all implemented solutions meet required security standards. Design and implement highly available, scalable, and resilient systems. Desirable Skills and Technologies Proven experience with cloud platforms, including AWS, Azure, and Azure Virtual Desktop. … Experience deploying applications within cloud architectures, Hands-on experience with web application services. Familiarity with Test-Driven Development and Behaviour-Driven Development Experience in API design, development, and integration. Knowledge of monitoring and observability systems. Understanding of modern digital delivery processes and agile methodologies. Working knowledge ...

suited to an experienced consultant who enjoys setting technical direction, mentoring engineers, and acting as a trusted technical partner to clients. Responsibilities Lead the design and delivery of full stack JavaScript solutions Set technical direction, standards, and best practices across projects Remain hands-on, contributing to critical areas … Required Experience Extensive commercial experience with JavaScript/TypeScript Strong Front End experience with React (or equivalent) Strong Back End experience with Node.js and API design Proven experience in a Lead/Tech Lead/Senior Consultant role Experience designing and delivering scalable systems Strong stakeholder management ...