176 to 200 of 235 API Design Jobs in London

leading global marketing company is seeking a Senior Backend Engineer to design and develop scalable backend systems for their unified marketing platform. This hands-on role requires strong expertise in Python and modern development patterns, with a focus on performance, reliability, and observability. You will collaborate cross-functionally … influence best engineering practices within a hybrid work environment. Candidates should be skilled in API design, architecture patterns, and cloud technologies. #J-18808-Ljbffr ...

fraction of the cost of developing these systems independently. Backed by leading venture capital investors and engineering partners, we are rapidly scaling the design, production, and deployment of the satellites, ground systems, and network infrastructure that will power Meridian's next-generation constellations. Joining Meridian means working … part of a close-knit, collaborative team that thrives in a fast-paced, innovative environment, where your work directly advances the design, development, and deployment of satellite constellations that governments and enterprises around the world will depend on for secure, resilient, and sovereign connectivity. Your Mission on the Team ...

building an automated lab that lets AI agents run biology experiments. We're entering the era of agentic science where AI models can now design novel proteins, propose hypotheses, and iterate on experimental results. But they can't run the experiments themselves - that's still a manual, months-long … biotech today. Our automated lab is powered by a deep software + hardware stack: lab instruments worth millions of USD reverse-engineered into API-controllable hardware, dozens of devices orchestrated through complex workflows, full observability on everything that happens in the lab, processing pipelines for messy physical-world data ...

today Drive the evolution of the platform toward a modular, agentic-ready architecture - opening the platform to AI agents, decomposing the stack into clean API surfaces, and building the infrastructure that retailers and partners can build on top of Champion AI-native ways of working within engineering itself - agentic … market moves Engineering Leadership & Organisation Lead and develop the full engineering leadership layer - Directors, senior managers, and functional leads across platform & product engineering Design the engineering org structure to execute on the product roadmap, scale with the business, and attract and retain the calibre of people NewStore needs ...

will have ownership and autonomy from Day One. There is no corporate ladder at Arondite. From your first day, you will directly influence the design, functionality, and direction of Arondite’s product offering. We hire the best people and give them extremely high levels of autonomy … synthesising their feedback Building a clear, explainable process for prioritising work in the face of B2G uncertainty Communicating to and working with Engineering and Design to build powerful, simple features that can be customised to deliver value to a wide set of users Championing a culture of technical excellence ...

Webbyfox is a UK-based Python web development agency seeking a Senior Python Engineer to design, build and scale backend services powering our products. You will own services end to end—from architecture and API design to deployment and monitoring—and collaborate with product, data and DevOps ...

Expedia Group in London seeks a Senior Engineering Manager to lead the Hotels.com Technology team. You will guide design and delivery across high-traffic services, own API design and data models, and mentor engineers in a fast-moving, high-quality environment. You will stay technically hands … contribute to code reviews, and champion safe AI/ML adoption while partnering with product, design, data, and platform teams to drive value for travelers and partners. #J-18808-Ljbffr ...

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. ...

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 ...

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 ...

Sokin is seeking a Senior Product Manager for External Developer Experience in London. You will own the developer experience end to end, including the API product, technical docs, sandbox and white label offers for partners and embedded solutions. You will set standards for API design, ensure production ...

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. ...

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 ...

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 ...

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 ...

experiences that feel inevitable. We ship constantly, make decisions with imperfect data, and act like owners. We think deeply about how people work together, design systems that scale, and remove friction before it’s felt – orchestrating every step toward value in lockstep with Design, Engineering … people work. What you’ll do Own core parts of the Attio product and contribute to overall product steering. Work with engineering to design systems that are simple to use but flexible and durable. Deeply understand the technical and user-facing implications of models, pipelines, and performance, making thoughtful ...

Situations Vacant Ltd in Greater London is seeking a Java Specialist to join our Oracle CX Cloud Practice, focusing on design, development and implementation of Java/J2EE solutions integrated with Oracle CX Cloud applications. You will work in a wider team to deliver elegant, scalable enterprise applications, mentor … peers, and contribute to architecture, API design and data modelling. A competitive salary and growth opportunities are offered on cutting-edge projects. #J-18808-Ljbffr ...

Yapily is seeking an experienced Technical Software Engineering Lead to drive design, development and delivery of core microservices. You will blend hands-on coding with architectural oversight and people leadership to enable an AI-enabled engineering culture and faster developer velocity. You will own architectural decisions, shape API … design, ensure system health and collaborate with Product on capacity planning and strategy while mentoring ICs and guiding teams through complex engineering #J-18808-Ljbffr ...

real time isn't a nice-to-have. It's mission-critical infrastructure. That's what we build. How We Work: AI-First by Design Harmonic exists to help enterprises adopt AI safely and at scale. We hold ourselves to that same standard. Everyone here actively leverages AI tools … determine where the benefits can be felt the most. Holding technical conversations with engineers, both ours and those at partners and customers, covering API design, authentication, and common integration patterns to understand how systems fit together and how they might break. Spending real time with existing customers ...

month contract, with high extension potential. The role is remote across Europe, 100% remote, working on backend services and AI-powered features. You will design, build and iterate features end to end using Node.js (NestJS/Express/Fastify), with emphasis on API design and scalable architectures. ...

point to what that team shipped and how the people on it grew. You are technically credible with experienced engineers. You can review a design, understand the trade‐offs in distributed systems or payment platforms, and recognize when a technical problem needs deeper investigation. You are comfortable managing … decisions to both engineers and non‐engineers. Examples of Desirable Skills, Knowledge, and Experience Strong technical grounding in distributed systems, low‐latency transaction processing, API design, web security, or adjacent areas. Experience building or operating products involving traditional payment rails, digital wallets, or open authorization/authentication standards ...

Reply is seeking a Graduate Software Integration Engineer to join the Integration practice. You will help design and deliver integration solutions across enterprise environments, connecting systems, data, and services. Training on MuleSoft, WebMethods, Talend, Tibco, and Dell Boomi will be provided, with Summer/Autumn 2027 intake. You will … work with modern integration platforms, contribute to API design and data transformation, and grow your consulting skills in an agile team setting. #J-18808-Ljbffr ...

engineer to build and evolve the SDK that ships inside our customers' games. The role is SDK work, not app work, with ownership from API design to live support. Based in-office (hybrid model) in London or Ljubljana, Slovenia. You will own the public API surface across ...

experience with C++ or Rust, and collaboration across multiple teams, including Compliance and Operations. Ideally, you bring knowledge of fixed income systems, experience with API design, and familiarity with Kubernetes and CI/CD practices to help scale our technology platform #J-18808-Ljbffr ...

London is seeking a hands-on Tech Lead to shape the future of our customer contact technology. You will own architectural decisions, drive API design and mentor engineers to build secure, scalable cloud-native solutions using Node.js, React, TypeScript and AWS. Working with product managers, architects and engineering ...