351 to 375 of 455 API Design Jobs

Senior .NET Core Developer - Hybrid Role in Brighton

Location
Brighton, England, United Kingdom
C#, SQL, and modern architectures, migrating to .NET Core, with Azure DevOps for CI/CD and Elastic Stack for logging and analytics. Strong API design, event sourcing concepts, and experience with RabbitMQ are essential. #J-18808-Ljbffr ...

Senior Full-Stack Engineer - AI/ML Leader (Hybrid)

Location
Greater London, England, United Kingdom
quality software. The role blends hands-on development with stakeholder partnership and setting engineering standards. The position emphasizes frontend ReactJS/TypeScript, strong backend API design, DevOps, and practical AI feature integration. It offers hybrid work across offices, client sites, and home, with growth and wellbeing programs available. ...

Senior Software Engineer (£80k + benefits)

Hiring Organisation
Morson Edge
Location
Manchester, United Kingdom
Employment Type
Permanent
Salary
£60000 - £80000/annum benefits
over how the platform evolves and will be given the opportunity to be involved in all aspects of the systems you work on, from API design and back-end architecture, through to deployment and supporting systems in production. Skills: • C#, .NET, PostgreSQL, React • AWS (S3, RDS, OpenSearch) • GraphQL ...

Principal Engineer

Location
Cambridge, England, United Kingdom
systems, or Engineering Extensive hands-on experience (10+ years) in software engineering within modern digital environments. Demonstrated expertise with cloud-native architectures, distributed systems, API design, and modern frameworks. Deep understanding of DevOps, CI/CD pipelines, and environment automation. Strong diagnostic and problem-solving skills for complex ...

Senior Engineering Manager (GenAI & Agentic Platforms) Location: London

Location
Greater London, England, United Kingdom
logic, and security, and establishing quality gates and safety nets for team workflows. Experience leading platform products, with a strong instinct for self‐service, API design, developer experience, adoption and avoiding unnecessary complexity. Clear communication and stakeholder leadership, with the ability to align teams with different incentives, make ...

Full Stack Engineer - AI & Cloud-Native (Azure)

Location
Greater London, England, United Kingdom
enabled capabilities. Ideal candidates have strong C#/.NET or Python skills, experience with React/Angular, and a solid background in secure, scalable API design. This role emphasizes collaboration with product stakeholders and cross-team delivery. #J-18808-Ljbffr ...

Staff Engineer, Global Billing & API Platform

Location
City of Edinburgh, Scotland, United Kingdom
Kaluza, the Energy Intelligence Platform, seeks a Staff Engineer to own API Platform and Standards for Global Billing, Payments & API. This hybrid role allows work from London, Bristol, or Edinburgh, with 3+ days in the office and a strong focus on scalable API design to enable rapid … growth in new markets. You will lead design, standards, and cross-team collaboration to ensure reliable, secure billing and payments capabilities at scale across our global platform. #J-18808-Ljbffr ...

Principal Engineer (AWS & Java)

Location
Nottingham, England, United Kingdom
changes, setting the standard for quality, performance, and maintainability. Provide hands‐on expertise in Java‐based systems, including concurrency, performance tuning, memory management, and API design. Non‐Functional Ownership & System Performance Take a leading role in defining, implementing, and validating non‐functional requirements, including system latency, throughput, scalability ...

Mobile Engineer

Location
City of Edinburgh, Scotland, United Kingdom
both platforms with Flutter. Work closely with our QA department and the developer teams working on the individual games. Contribute to the design and architecture of new features and improvements for the mobile platform. Troubleshoot and debug complex issues, optimize code, and improve overall stability. Collaborate with other Rockstar … workflow. Strong experience with Flutter for UI/UX. Strong experience with Ruby for build automation. Strong CS fundamentals, including excellent understanding of OO design patterns and concepts. Experience with API design and development. Experience with source control, preferably Git. PLUSES Please note that these are desirable ...

Senior Consultant - Hybrid (Product / Transformation / Architecture), TC, FS

Location
Royal Borough of Greenwich, England, United Kingdom
build a better working world. Role highlights Early‐career hybrid who connects product, delivery and architecture. Shape stories, scenarios and NFRs with traceability to design/build. Support domain modelling and interface specifications for core programmes. The opportunity At EY, you’ll have the chance to build a career … Backlog shaping: user stories, scenarios, acceptance criteria and NFRs; maintain definition‐of‐ready/done. Architecture support: contribute to domain models, interface specs and API/event definitions; maintain requirements‐to‐build traceability. Delivery hygiene: reporting, risks/decisions, demos and release readiness; contribute to playbooks and templates. Continuous ...

Principal Software Engineer, Backend

Location
Greater London, England, United Kingdom
reference architecture for these services and are accountable for how fast and how reliably they run. You will write production code, make the hard design calls, and raise the bar for every backend engineer who joins after you. What you will own Our backend layer … reference architecture for these services and are accountable for how fast and how reliably they run. You will write production code, make the hard design calls, and raise the bar for every backend engineer who joins after you. Scope BFF services and their APIs to all clients. Integration with ...

Senior Node.js Backend Engineer — Remote, Lead API & Architecture

Location
Greater London, England, United Kingdom
Vista Global, the world’s leading business aviation company, is hiring a senior software engineer to own backend architecture and API design for scalable services. This permanent, full-time role offers a remote-first setup with strong autonomy and opportunities to influence product direction across global teams. ...

Full-Stack Data Obfuscation Engineer | AI & Security

Location
Glasgow, Scotland, United Kingdom
Morgan Stanley in Glasgow seeks a Full Stack Engineer (AI, Automation, and Data) to design scalable, secure data platforms and services for enterprise data protection. You’ll work across on-prem and multi-cloud environments, building resilient databases and full-stack applications with Java, Spring Boot, Angular, and Python. … Emphasis on AI, data masking, and automated workflows. Ideal candidates have 4+ years’ experience in complex data solutions, API design, and secure development practices, #J-18808-Ljbffr ...

Product Designer

Location
United Kingdom
know how to use tools like Claude to prototype fast and move quickly. Responsibilities Own frontend surfaces across all of pod's products. Design and implement scalable, real-time UI architecture for data-intensive and high-volume workflows. Build and maintain products including but not limited to order book … product intuition. Set and uphold frontend standards for performance, code quality, and developer experience. Collaborate with backend and protocol engineers on SDK and API design, and contribute full-stack improvements where needed. Contribute to tooling, testing infrastructure, and CI/CD practices. Qualifications Must-haves: Deep expertise ...

Senior Client Engineer - Stumble Guys

Location
Dundee, Scotland, United Kingdom
technical performance (crash rates, FPS, startup times, CPU usage, etc) is healthy throughout the development Collaborate and communicate with cross-functional departments including game design, product management, marketing, etc. Think about and propose solutions to the challenging problems of game development What We're Looking For Strong knowledge … Unity or a similar technology (like Unreal Engine) Knowledge of Photon Quantum is a plus Strong understanding of the basics of software engineering fundamentals: design patterns, game framework architecture at scale, maintainability over time, robust API design, etc. Solid understanding of mobile networking best practices: request limiting ...

Senior iOS Engineer II - Account Mobile

Location
Greater London, England, United Kingdom
Wise Account users. Collaboration is key to how we operate across the business in this role, and you will work alongside product, design, and analytics teams to create the best tools for our users, helping them manage their cross-currency needs with ease whilst shaping the Wise Account offering. … build consistent experiences across Wise’s native applications and the web and enable features with a customer centric focus. Collaborate closely with product, design (UI), analytics, and other teams across the company to deliver impactful experiences to Wise users as part of a cross-functional team. Take responsibility ...

Staff Embedded Software Engineer

Location
Milton Keynes, England, United Kingdom
systems. As a Cesium software team member, you will be responsible for software designs from concept through production, including product roadmaps, block diagrams, detailed design and coding, analysis, test, qualification, and in-orbit support. The ideal candidate will have development experience at nearly every level of the software stack … experience in software testing and high-reliability qualification, as well as software engineering and software project management practices. The successful candidate will present engineering design review materials to our customers and executive team, as well as participate in proposal-writing efforts. As such, excellent written and verbal communication skills ...

Senior Laravel Developer

Location
United Kingdom
Senior Laravel Developer working on bespoke B2B platforms for UK and international clients. You will own features end-to-end — from technical design through deployment — within agile squads that demo weekly. Requirements 5+ years PHP/Laravel experience Strong MySQL and API design skills Experience with Livewire ...

Senior AI Engineer: Build Intelligent Validation & Automation

Location
United Kingdom
Senior AI Software Engineer to join a growing team delivering AI-powered validation and automation for connected products and digital services. You will design intelligent validation frameworks, build agent-based automation using MCP, and integrate foundation models with cloud platforms. The role involves API design, scalable architectures ...

Backend Software Engineer – Python/Flask (TimeKeeper)

Location
Belfast City District, Northern Ireland, United Kingdom
Group in Belfast is seeking a backend-focused Full Stack Software Engineer to strengthen the TimeKeeper platform. The role centres on Python-led development, API design and data layer work across web and mobile apps. You'll join a collaborative team, learn new tools quickly, and help build ...

Full-Stack Engineer

Location
United Kingdom
background job systems You ship: you take a feature from idea to production without waiting to be unblocked Care for detail in UI and API design alike Clear written communication in a remote team Nice to Have Experience with node-based editors, canvas UIs, or design tools ...

Senior Platform Engineer – Risk Services

Location
Greater London, England, United Kingdom
analytical requirements into scalable, maintainable software. Guide architecture, code reviews and engineering standards. What you’ll bring Strong production Python and backend engineering experience. API design, cloud services and containerised workloads. Job orchestration, message queues and SQL integration. CI/CD, monitoring, security and production troubleshooting. An understanding ...

Senior Backend Developer - Architecture, Data Modelling

Hiring Organisation
Hays Technology
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£800 - £900/day £800-900 per day via Umbrella
with substantial hands-on responsibility rather than purely architectural oversight. Strong backend and database skills . Production experience with TypeScript/JavaScript and Node.js , API design, asynchronous programming, SQL and relational data modelling. Evidence of performance improvement. Practical experience profiling applications, diagnosing bottlenecks and reducing ...

Software Engineer, Non-Realtime Controllers

Location
Oxford, England, United Kingdom
across our fleet, contributing directly to the success of building utility‐scale quantum computers. Own a group of device controllers end to end, covering API design, implementation, rollout and ongoing operational health Make services robust against the ways real instruments fail and strengthen observability, health checking and alerting ...

Senior Python Backend Engineer — Remote, Scalable APIs

Location
Greater London, England, United Kingdom
scalable Python-based services and APIs that power millions of users across global markets. You’ll work with Python and Django/FastAPI to design robust server-side applications and high-performance APIs, collaborating with data scientists and infrastructure teams. The role focuses on distributed systems, data processing … API design, with opportunities to work on challenging problems and modern frameworks in a #J-18808-Ljbffr ...