226 to 250 of 310 API Design Jobs in London

Software Engineer with senior-level expertise to architect and implement scalable, secure frontend and fullstack platforms. You will lead architecture decisions, drive design system adherence, and mentor teams across the software delivery lifecycle. The role focuses on modern frontend tech such as React/TypeScript, API design ...

focused on building a new platform that sits above its existing search technology stack. The project will involve creating a lightweight abstraction layer and API architecture that simplifies the user experience, whilst providing a foundation for future search platform evolution. This is an opportunity to work on a greenfield … quality solutions. Key responsibilities include: Designing and developing .NET Core services and APIs Building abstraction layers between front-end applications and search technologies Developing API services Working with Azure cloud services Designing and maintaining SQL databases Collaborating with senior stakeholders and engineers to refine requirements Contributing to architecture ...

Cloud and Order Management capabilities to support our clients retail and service operations. You will define technical standards, ensure best practices, and guide the design of integrated solutions that enhance customer experience and operational efficiency. Success in this role means delivering secure, scalable, and high-performing platforms that enable … solutions, ensuring alignment with enterprise standards. Collaborating with business and technical teams to translate requirements into scalable, secure, and high-performing solutions. Leading technical design sessions and providing guidance to development teams on best practices and integration patterns. Defining and maintaining architectural documentation, including data models, integration diagrams ...

JPMorganChase in London is seeking a Sr Lead Software Engineer (Java/Python) to help design, build, and deliver high-performance trading software within Digital Markets Execution Technology. You’ll contribute as a core technical member of an agile team, guiding architecture, coding, testing, and operations to meet ambitious … objectives. The role emphasizes secure, observable, and resilient systems, with leadership in code reviews, API design, and deployment across distributed environments. #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 ...

development lifecycle. You'll help establish a robust security culture as we unlock Granola for the next 100x users. In this role, you will: Design and implement security features within the Granola app to protect user data and strengthen the product's security posture Leverage AI-assisted tooling … security posture Your background looks something like: Extensive experience building production software, with hands‐on exposure to security‐sensitive work (auth, data handling, API design, encryption or similar) and a genuine interest in going deeper into application security Comfortable with secure coding practices and at least ...

Neo4j is building a new Product Analytics Platform to unify analytics across Aura. You’ll design and operate the Analytics API and the data-integration layer that supports multiple product teams. As a founding member, you’ll shape technical foundations, drive adoption, and collaborate with Product Management … engineering to evolve the platform as Aura scales. Strong Go backend experience and API design will be essential as you drive reliable, scalable ingestion with Segment/BigQuery knowledge. #J-18808-Ljbffr ...

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 ...

five days a week. You will define standards, mentor developers, and drive cloud-native modernization initiatives across Java and Node.js services. You'll own API design, security-first practices, and the CI/CD pipeline, with hands-on work on Azure services, containerisation, and logging. This ...

Inside IR35 12 month contract ASAP start date Hybrid - as and when required in London (infrequent travel) Skillset: Background in Software Architecture API design (REST is preferable). ++ Designing for use with User Interfaces would be a plus. Event-driven architecture patterns Familiarity with AWS and Kubernetes ...

modern app architectures like Unidirectional Data Flow, Dependency Injection, Structured Concurrency with Kotlin Coroutines, amongst others Desire to write testable code Understanding of REST API design Strong product mindset and passion for user experience, with a focus on prioritising work that addresses user needs and making data-driven ...

high-volume, high-leverage platform role: the systems you build are used by many teams across the company, so correctness, reliability, and thoughtful API design matter enormously. QualificationsWhat do you need?:5+ years of experience in Java, Kotlin, Python or Go Strong experience with Spring framework, relational databases ...

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 ...

sound, you are a generalist at heart. You will do whatever it takes to get a product into the hands of global users—from API design to frontend polish. Minimum Qualifications6+ years of software engineering experience, with a deep foundation in backend architecture and a proven ability ...

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 ...

KotlinFamiliarity with modern app architectures like Unidirectional Data Flow, Dependency Injection, Structured Concurrency with Kotlin Coroutines, amongst othersDesire to write testable codeUnderstanding of REST API designStrong product mindset and passion for user experience, with a focus on prioritising work that addresses user needs and making data-driven decisions. Excellent ...

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 PerformanceTake a leading role in defining, implementing, and validating non‐functional requirements, including system latency, throughput, scalability, and reliability. ...

Graph ArchitectExperience: 10+ years (5+ years in Knowledge Graphs/Ontology Engineering)Role OverviewWe are looking for a Knowledge Graph Architect to lead the design and governance of enterprise knowledge graphs. This role will define the ontology, data model, and canonical vs. interpretive boundaries, enabling scalable, high-quality graph … prioritization, and skill developmentStakeholder CollaborationPartner with data, AI/ML, and business teamsTranslate requirements into semantic modelsProvide thought leadership on graph adoptionRequired SkillsNeo4j Schema Design (Cypher, property graph modeling)Ontology Engineering (OWL/RDF, Protégé)Graph RAG (LLM integration, retrieval strategies)API Design (REST/GraphQL)Preferred ...

integrations, data flows, and onchain settlement Translate product, regulatory, and operational requirements into a clear engineering roadmap, well‐scoped projects, and sound technical decisions Design and build resilient services for on‐ramp and off‐ramp transaction lifecycles, including payment initiation, status tracking, settlement, exception handling, and customer notifications Lead … goals Strong backend programming skills. Production experience with Rust is highly desirable; deep experience with Go, Java, C++ can substitute Strong knowledge of API design, PostgreSQL or another relational database, messaging systems, and service‐to‐service integration patterns Experience in regulated fintech, payments, banking, digital assets, or another ...

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 ...

work though. The Senior ASP.NET MVC Developer must have:3-5 years C#, ASP.NETMVC 4 +SQL ServerStrong background in Computer ScienceNHibernate or equivalent ORMREST api design experiencesome automation experience (continuous delivery/powershell/python)I am looking for a Senior ASP.NET Developer that has proven development experience … packages in the market, all inclusive. My client is based near Kingston in LondonASP.NET MVC, razor, c#, sql, mvc, .net, javascript, greenfield, , data, analytics, api, jquery, rest, powershell, python, continuous, delivery, integration ...

/3Strong C#NET WebAPIDocument oriented databases (MongoDB, DocumentDB or others)GraphQL experience (Frontend/backend)Strong React/TypeScriptSingle Page ApplicationBDD/TDDESTful API design and developmentKnowledge and experience with Git and GithubCloud experience will be gained as they are currently running a massive migration and development project … packages in the market, all inclusive. My client is based in Bath.net core, ASP.NET MVC, razor, c#, sql, mvc, .net, javascript, greenfield, , data, analytics, api, jquery ...

systems behind them have to evolve with it, and you'll help decide how. What You'll Do Build and Evolve Core Services: Design, build and operate the backend services and APIs behind our data catalog, lineage and publishing systems, and evolve them as the platform adopts new storage … users. Who You Are You have solid experience building and running backend services and APIs in production with Java, and you care about API design, versioning and backward compatibility. You're comfortable with SQL and have worked with data pipelines or a cloud data warehouse such as BigQuery ...

core business systems. This is a hands-on development role working closely with other Developers, Business Analysts, Testers and Product Owners to design, build and support high-quality, maintainable software. In particular: Designing and developing robust Modern .Net (C#) and Angular solutions that support critical business processes Building well … knowing how to manage those risks. SKILLS REQUIRED You will be comfortable working in a collaborative development team, understanding business requirements, contributing to technical design decisions and delivering well-structured code that is reliable, maintainable and easy to support. You will be able to demonstrate: Strong commercial experience with ...