51 to 75 of 98 API Design Jobs in England

enjoys building from the ground up. The salary range is up to £120,000 depending on experience and fit. Key Responsibilities Own the design, development, and operation of the core backend services that power our consumer-facing products and internal operational tooling. Build scalable, low-latency systems that … notification preferences, audience segmentation, and delivery tracking. Integrate with third-party data providers and external services, ensuring robust failure handling, observability, and system resilience. Design and support secure internal tooling APIs, including role-based access controls, audit trails, change history, and safe administrative workflows. Build and operate event-driven ...

manual test strategies Documenting architectural decisions (ADRs) and maintaining clear technical communication Tech Stack & Experience Core technologies: .NET 10/ASP.NET Core Web API Entity Framework Core with Azure SQL .NET MAUI (offline-first mobile design) Microsoft Azure (App Services, Azure SQL, Blob Storage, Key Vault, Application Insights … They're Looking For 7+ years' commercial software development experience At least 2 years in a leadership position Strong expertise in modern .NET and API design Proven Angular experience (v15+) Hands-on Azure architecture and deployment experience Strong understanding of CI/CD and enterprise DevOps practices Experience ...

help raise the standard for those around you. What you'll do Collaborate with BAs and product owners to refine and deliver the backlog Design, build and maintain software solutions following best practices Implement test automation and support end users on production defects Mentor junior team members and lead … activities What we're looking for C# .NET proficiency with full SDLC experience in a commercial environment Design patterns, SOLID principles and Agile methodologies Test automation (NUnit, xUnit, Playwright) and RESTful Web API design UI skills — JavaScript/jQuery, Bootstrap/Tailwind TSQL and C# ORMs (Entity ...

Chicago). The role offers the opportunity to contribute to business-critical systems while working in a collaborative and supportive environment. Key Responsibilities Design, develop, enhance, and maintain enterprise applications using C# and .NET technologies. Support and improve existing business-critical systems, ensuring stability, performance, and scalability. Work closely … with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute to technical discussions, solution design, code reviews ...

Chicago). The role offers the opportunity to contribute to business-critical systems while working in a collaborative and supportive environment. Key Responsibilities Design, develop, enhance, and maintain enterprise applications using C# and .NET technologies. Support and improve existing business-critical systems, ensuring stability, performance, and scalability. Work closely … with business users, analysts, and technical teams to gather requirements and deliver solutions. Participate in the full software development lifecycle, including design, development, testing, deployment, and support. Collaborate with globally distributed development teams across multiple locations and time zones. Contribute to technical discussions, solution design, code reviews ...

.NET/C#,, NET Core and familiarity with SQL or data skills Proficiency in Front end tech stack React or Angular Understanding of system design, domain modelling, and API design principles Experience writing unit and integration tests and working with CI/CD pipelines Exposure to cloud ...

looking for: • Hands-on experience running real production workloads on AWS — not just deploying to it • Strong Postgres/SQL skills: schema design, query tuning, migrations • Solid API design chops: clear contracts, versioning, backwards compatibility • Python-first mindset (FastAPI or similar) • Redis experience: caching patterns, invalidation ...

work from home 1 day a week if desired. The salary on offer is £50,000-£62,000 DOE plus good benefits. Key Responsibilities Design, develop, and maintain scalable web applications using modern frameworks and technologies. Integrate Twilio APIs for voice, messaging, and video communication features. Collaborate with product … Twilio APIs (voice, SMS, video) and related integrations. Proven ability to build and work with real-time, event-driven systems. Solid grasp of RESTful API design and microservice architecture. Hands-on experience with AWS serverless technologies including DynamoDB, Lambda, and API Gateway. Familiarity with CI/ ...

influence technical strategy Work within a senior, AI-first engineering environment KEY POINTS Senior technical leadership role with significant architectural ownership Leading the design and development of a modern platform rebuild Strong focus on Node.js, TypeScript, React and cloud technologies Opportunity to shape engineering standards, architecture and AI adoption … role where you'll help shape the future of a modern, large-scale platform whilst remaining hands-on with development. You'll lead the design and delivery of scalable backend services, APIs, integrations and data flows, whilst providing architectural guidance across the wider engineering team. Although the role ...

agile scrum team, reporting into a Technical Lead. This team's primary goal is to be a source of good practice for customer facing API design and implementation at VoCoVo, in partnership with our architects. This is both for APIs available as part of our cloud based management … Node.js/TypeScript, including unit and integration testing. Full-stack engineering experience, using modern frontend frameworks and libraries such as React. Exposure to the design, build and integration of HTTP-based APIs. Excellent communication skills, with the ability to clearly explain complex technical concepts both verbally and in writing. ...

lead a team of elite engineers who embed directly with Fortune 500 customers to ship deeply integrated AI agents—owning everything from agent design and evaluation to the backend services, data systems, and cloud infrastructure that make them production-ready. You'll partner closely with our Forward Deployed … volume for senior engineering roles. Hands‐on fluency with the full AI stack. Deep familiarity with LLMs and agent systems, evaluation frameworks, backend and API design (Python or TypeScript), data systems (PostgreSQL, DynamoDB, MongoDB, or similar), and cloud infrastructure (AWS, Azure, or GCP) including Kubernetes, Docker ...

Tech Lead, Senior Software Engineer or Software Architect who enjoys solving complex technical problems and building modern, scalable software. Role & Responsibilities Lead the technical design and evolution of a large-scale business-critical platform. Improve the existing architecture and define a pragmatic roadmap towards a modern, scalable solution. Design … powered capabilities into the product to improve functionality and user experience. Drive the adoption of AI-assisted software development tools and engineering best practices. Design integrations with enterprise platforms, APIs and wider business systems. Work closely with Product, Architecture and Engineering teams to deliver incremental improvements. Mentor developers ...

features-you will be building impactful, user-facing applications from day one. Working closely with the founding team, you will help architect robust APIs, design intuitive frontend interfaces, and integrate cutting-edge AI/ML models into our core product. Qualifications & Experience Essential: 0-2 years of hands … projects). Education: A degree in Computer Science, Information Technology, or a related discipline. Core Fundamentals: A solid grounding in web development fundamentals, REST API design, and secure coding practices. Frontend: Proficiency in React and TypeScript, with a clear sense of how to build maintainable component hierarchies. Backend ...

distributed video recording systems and advanced reporting/analytics applications. In this role, you will be deeply involved in hands‐on development, architectural design, and cross‐studio collaboration to advance our internal ecosystem. Key Responsibilities Design & Implementation: Architect and develop robust backend solutions to meet the fast‐paced … challenges of global game development. Technical Leadership: Contribute to the team’s software design guidelines, coding standards, and architectural blueprints. Global Collaboration: Partner and collaborate with other Rockstar technology teams across our worldwide studios. Continuous Innovation: Develop a deep understanding of existing systems while researching and adopting new technologies ...

evolve our stack and make constant improvements. Required Skills/Experience Strong C# development experience Experience with both .NET Core and .NET Web API Experience of building Microservices in .Net Core Experience using Message Based Architectures Experience using both SQL & NoSQL technologies Experience of API design Cloud ...

working on the underlying systems that make complex visualisations fast, accurate, and scalable. The challenges range from rendering performance and interaction design through to algorithms, graphics, API design, and numerical correctness. What you’ll be doing Designing and building core charting features used by developers around … exceptionally high technical standards High levels of ownership and autonomy Small team, significant impact Opportunity to deepen expertise in performance, graphics, visualisation, and systems design Package Salary up to £200,000 Hybrid working (London) Private healthcare Pension Additional benefits If you’re interested in building the technology behind modern ...

client data will be sourced, validated, and integrated into Mondra, leveraging where possible our existing Import and Export APIs and identifying where custom API development may be required for fulfil Mondra’s data requirements. You will also contribute to the client contracting process, ensuring technical commitments are clearly defined … including mapping data sources, transformation logic, and validation processes. Identify the client’s BI requirements, and define data export strategies (preferably via existing Mondra API). Identify the authentication/authorisation capabilities of the client, and promote the integration with Mondra’s Identity Provider via Single Sign On. Leverage ...

their career in Solution Architecture or is ready to transition from Business Analysis or Integration Developmen t into a role where you'll help design innovative enterprise integration solutions for a diverse client base. Working alongside experienced Solution Architects and delivery teams, you'll gain valuable exposure to enterprise … integration projects while developing your expertise in solution design, architecture best practices, and modern iPaaS technologies. This is a fantastic opportunity for someone who enjoys combining technical knowledge with business engagement and wants to develop into a senior architecture role. Key Responsibilities Support the design and documentation ...

their career in Solution Architecture or is ready to transition from Business Analysis or Integration Developmen t into a role where you'll help design innovative enterprise integration solutions for a diverse client base. Working alongside experienced Solution Architects and delivery teams, you'll gain valuable exposure to enterprise … integration projects while developing your expertise in solution design, architecture best practices, and modern iPaaS technologies. This is a fantastic opportunity for someone who enjoys combining technical knowledge with business engagement and wants to develop into a senior architecture role. Key Responsibilities Support the design and documentation ...

LangChain or LangGraph (agent memory, tool calling, state management) Dagster in production (assets, sensors, partitions) or equivalent pipeline orchestration Strong backend fundamentals including API design, async programming, and database modelling You've built systems that had to work reliably at scale, not just pass a demo Experience 5+ ...

months - Hybrid - INSIDE IR35 I am working with a client who are seeking an experience Solution Architect with strong background in leading the architectural design for the replacement of legacy systems. Key Responsibilities: * 'As-Is' Architecture Baseline: Work closely with the existing technical experts to decode and document … complex, often undocumented 'As-Is' state, including direct database connections, legacy XML feeds, and custom point-to-point scripts. * Target State Design: Provide the strategic oversight for the design of the comprehensive 'To-Be' architecture mapping to the 7 core functional modules (Commissioning, Identity, Rights/Contracts, Financial ...

Data & ML Pipelines: Model data for strict auditability, versioning, and efficient querying, feeding structured datasets directly into downstream machine learning models. Empower Internal Teams: Design and implement intuitive, responsive web interfaces that allow non-technical stakeholders (Legal, Operations, Trust & Safety) to author and manage content policies with robust approval … services using Java, Kotlin, or Go . Modern Frontend Skills: Hands-on experience building clean, intuitive internal tooling using React and TypeScript . System Design & Integrity: Deep understanding of API design, backward compatibility, and data modeling for complex, versioned systems where stability is critical. Data Savvy: Experience ...

impact operational efficiency, asset performance, and decision-making in a sector where outcomes truly matter. Key responsibilities: Lead the end-to-end architecture and design of IBM Maximo solutions, ensuring alignment with business objectives and defence-specific compliance requirements. Define and implement secure, scalable, and resilient solution architectures within … Support testing, deployment, and release management processes, ensuring high-quality and secure deliverables. Stay current with emerging technologies and best practices, continuously improving solution design and delivery approaches. Essential Skills Strong hands-on experience with IBM Maximo/Maximo Application Suite (MAS) in architecting and delivering enterprise-scale solutions. ...

role, with strong backend expertise in Typescript and Node and front capability in React Proficiency in SQL, Redux, cloud services (AWS or GCP), RESTful API design and GraphQL Strong analytical skills with the ability to design, optimise, and troubleshoot complex UIs Excellent communication and leadership skills; ability ...

develop new features, enhance existing systems, and ensure our platform remains stable and efficient. Your deep understanding of Rails architecture, PostgreSQL optimisation, and API design will be essential as you contribute to ongoing development projects. If you enjoy collaborating in Agile/Scrum environments, value clean code ...