51 to 75 of 126 API Design Jobs in England

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 ...

building and knowledge-sharing initiatives Skills & Experience Required Significant senior backend development experience with strong Python proficiency (async programming, concurrency, multithreading) Expertise in RESTful API design, OpenAPI/Swagger documentation and API lifecycle best practices Hands-on experience with ML libraries: PyTorch, PySpark, scikit-learn, Hugging Face … machine learning, cloud computing or data engineering highly advantageous Professional accounting qualification desirable but not required Nice to Have Experience with Microsoft Graph API Background in audit, financial services or regulated industry technology What's on Offer A competitive salary and benefits package, flexible hybrid working across 20+ ...

bringing technical considerations such as capacity, security, maintainability, and other non-functional requirements into the designs of the team and lead aspects of design and planning of the software components within the larger project design. What will you be doing day-to-day? Lead the agreed aspects of technical … design, code implementation, code review and testing of any delivered components Provide coaching and support to others in the Software Engineering team, regarding technologies and best practice Support the Squad Lead in managing and enhancing the CI/CD capabilities of the squad Participate actively in Agile ceremonies, project ...

collaborative, fast-moving, and driven by technical excellence. Engineers are trusted to lead, influence, and make meaningful decisions. The Role and Deliverables Lead the design and build of end-to-end AI-powered applications, from initial architecture through to production deployment. Architect scalable backend services and intuitive frontend interfaces … that expose AI capabilities to enterprise users. Design and implement agentic AI systems, including orchestration patterns, tool integration, and evaluation approaches. Set technical direction and best practices across the full stack, ensuring high standards of quality and maintainability. Provide technical leadership through code reviews, design input, and hands ...

Senior Applied AI Engineer (.NET) Were looking for a Senior Applied AI Engineer to design and deliver production-grade AI-powered features within a modern .NET product environment. This is a hands-on engineering role focused on applying AI in real systems not training models. Youll work with commercial … role suits someone who has already successfully integrated AI into production products and can bring proven patterns into a growing team. What Youll Do Design and build AI-powered product features within a C#/.NET ecosystem Integrate commercial AI APIs into production systems with a focus on reliability ...

fast-moving startup environment. The Role Technical Strategy & Leadership Work alongside the founder to define and evolve the technical roadmap Lead architectural design and critical technology decisions Champion engineering best practices, code quality, and technical excellence Mentor, coach, and grow engineers at all levels Foster a culture of ownership … collaboration, and innovation Backend Architecture & Development Architect, build, and scale backend services and RESTful APIs Design, optimise, and maintain MongoDB database solutions Improve system reliability, performance, and scalability Resolve complex production issues with robust solutions Implement microservices and modern backend patterns Collaboration & Delivery Partner with Product, Design ...

owning services end-to-end, and delivering production-ready software at scale. You'll take ownership of microservices across the full software lifecycle - from design and development through to deployment, monitoring and optimisation in production. You'll work closely with product, platform and data teams to deliver scalable solutions … improve engineering standards, and contribute to the ongoing evolution of a modern event-driven architecture. Key Responsibilities Design, build and own cloud-native microservices and APIs Develop and maintain integrations with internal systems and third-party platforms Take ownership of services in production, including monitoring, troubleshooting and optimisation Build ...

Best Practices Conduct in-depth reviews of codebases to identify issues, inefficiencies, and potential security vulnerabilities. Provide recommendations on best practices, including coding standards, design patterns, and maintainability improvements. Support performance optimisation through refactoring and improved architecture. Support testing and QA process. 2. Cloud Infrastructure Support & Design Assist … architecture, tools, and frameworks. Identify opportunities for automation and process improvements. 4. Software Architecture & Development Strategy Advise on scalable and efficient system architectures Support API design, integrations, and data flow strategies. Recommend suitable technology stacks for new projects or modernisation efforts. 5. Security & Compliance Assess application security risks ...

support junior and senior engineers Conduct code reviews and uphold engineering best practices Backend Engineering Build and maintain scalable backend services and RESTful APIs Design and optimise MongoDB database solutions Improve and maintain existing backend infrastructure Troubleshoot production issues and implement robust solutions Collaboration & Delivery Work closely with cross … have experience with: MongoDB (data modelling, indexing, aggregation, performance tuning) Node.js and the wider JavaScript/TypeScript ecosystem Express.js and/or Fastify RESTful API design AWS or similar cloud platforms Microservices architecture Testing frameworks (Vitest, Jest, Mocha, etc.) CI/CD pipelines & DevOps practices GitHub workflows Observability ...

scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

scalable cloud-native platforms, modern web applications, APIs, and digital services that support meaningful and high-impact programmes. What Youll Be Doing Leading the design, development, and delivery of secure full-stack applications using Java, React, and modern web technologies Building scalable back-end services, APIs, and distributed systems … Java and modern front-end frameworks such as React Previous experience operating at Senior, Lead, or Principal Engineer level Strong understanding of software architecture, API design, and scalable distributed systems Experience building cloud-native applications and working within AWS, Azure, or similar cloud environments Strong knowledge of DevOps ...

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 ...

fast-moving, product-centric environments. Key requirements: Ruby & Ruby on Rails Full-Stack Engineering: JavaScript, TypeScript, React, Hotwire, Stimulus Node.js & React exposure beneficial API Design: REST, GraphQL, external integrations Data Stores: PostgreSQL, MySQL, Redis, Elasticsearch Async Processing: Sidekiq, Resque Cloud & DevOps: AWS, Heroku, Docker, CI/CD pipelines … Testing & Quality: RSpec, Capybara, TDD methodologies Security, performance tuning, and system hardening AI & LLMs: API integration, prompt engineering, AI-enhanced features and developer tooling Responsibilities: Provides hands-on technical leadership to engineering teams (515 people), including mentoring, code review, and architectural direction. Owns end-to-end system architecture, ensuring ...

cloud-based infrastructure Tech Stack Backend: Java, Spring Boot (Data, Security, MVC) Frontend: Vue.js Cloud & DevOps: AWS, CI/CD pipelines Data: SQL, database design & optimisation Architecture: RESTful APIs, scalable system design What They’re Looking For Strong experience in Java + Spring Boot at a senior level … Deep expertise in Vue.js and modern frontend development Proven experience building scalable, production-grade systems Solid understanding of API design, databases, and cloud environments Ability to take high-level requirements and break them down into technical delivery Experience mentoring engineers or leading technical projects Nice to have: Exposure ...

beneficial). CI/CD Proficiency: Deep understanding of the software development lifecycle, automation best practices, and modern CI/CD tooling. Scalable System Design: Experience designing, building, and maintaining highly available, scalable systems. API Design: Familiarity with best practices for REST and GraphQL API design. ...

driving alignment across various teams with different priorities, ways of working to achieve solution standardisation. You sit at the intersection of business strategy, solution design, and delivery execution, shaping how D365 integrates and evolves globally. You work closely with integration architects, solution architects, developers, engineering/product teams … event-driven patterns.* Review and approve specifications, customisations, and integrations that impact end to end process flows across multiple systems.* Facilitate cross‐system design alignment with solution owners (POS, WMS, EDI, middleware, data platform, identity/security), ensuring decisions are understood, documented, and governable.* Support environment and build strategy ...

pipelines using Python and common ML and DL libraries (e.g. Pytorch, Tensorflow) from early conceptualisation to full deployment in scalable production environments Ability to design, deploy and maintain ML solutions on modern frameworks to meet functional business requirements, adhering to software engineering best practices and with exposure to version … control, testing, MLOps, CI/CD and API design Hands on experience in using one of 3 major cloud technologies (AWS, Azure or GCP) in a production environment, as well as ML platforms (e.g., AWS Sagemaker, Azure Machine Learning studio) Be a ‘lifelong learner’ and can demonstrate ...

clean, maintainable, performant applications; promote best practices, and collaborate closely with our quantitative and product teams. What You’ll Do High-Performance JVM Engineering: Design and build high-quality, scalable and performant low/zero-GC JVM services and APIs Technical Translation & Risk Modeling: Understand risk models & decompose complex … experience in architecting highly performant, low-latency systems. Testing Methodologies: In-depth knowledge of testing methodologies, including TDD, back testing and stress testing Software Design Excellence: Well versed in Agile methodologies, DRY, Clean Code, API design and micro-services. Technical Ecosystem: Experience in a full range ...

generated code for correctness, security, and financial accuracy Desirable, but no essential: Experience with Apache Airflow or similar workflow schedulers REST or GraphQL API design experience Knowledge of fixed income, FX, or derivatives products and associated P&L/risk methodologies ...

generated code for correctness, security, and financial accuracy Desirable, but no essential: Experience with Apache Airflow or similar workflow schedulers REST or GraphQL API design experience Knowledge of fixed income, FX, or derivatives products and associated P&L/risk methodologies ...

roles, with a track record of building solutions end-to-end Experience deploying applications in cloud environments, preferably Microsoft Azure Strong experience in REST API design and OpenAPI standards Extensive experience working with databases, data platforms, and analytical tools Ability to research, propose, and implement solutions with minimal ...

roles, with a track record of building solutions end-to-end Experience deploying applications in cloud environments, preferably Microsoft Azure Strong experience in REST API design and OpenAPI standards Extensive experience working with databases, data platforms, and analytical tools Ability to research, propose, and implement solutions with minimal ...

fast-moving, product-centric environments. Key requirements: Ruby & Ruby on Rails Full-Stack Engineering: JavaScript, TypeScript, React, Hotwire, Stimulus Node.js & React exposure beneficial API Design: REST, GraphQL, external integrations Data Stores: PostgreSQL, MySQL, Redis, Elasticsearch Async Processing: Sidekiq, Resque Cloud & DevOps: AWS, Heroku, Docker, CI/CD pipelines … Testing & Quality: RSpec, Capybara, TDD methodologies Security, performance tuning, and system hardening AI & LLMs: API integration, prompt engineering, AI-enhanced features and developer tooling Responsibilities: Provides hands-on technical leadership to engineering teams (515 people), including mentoring, code review, and architectural direction. Owns end-to-end system architecture, ensuring ...

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 ...