126 to 150 of 202 GraphQL Jobs in London

data domain: securities reference data, corporate actions, market data, and regulatory classifications, fixed income would be highly desirable Understanding of API design principles (REST, GraphQL) and schema evolution strategies for backward compatibility is essential. Direct experience of making data commercially available to AI agents is desirable. Fluent in English (both ...

Experience of big data technologies (e.g. Spark, Hadoop) Have constructed batch and streaming microservices exposed as REST/gRPC endpoints Familiarity with GraphQL We recognize that our people are our strength and the diverse talents they bring to our global workforce are directly linked to our success. ...

JavaScript and ServiceNow development, including server and client‐side scripting, security, performance considerations, and debugging Experience designing and building ServiceNow integrations using REST, GraphQL, IntegrationHub, security configuration, and third‐party apps Experience mentoring engineers and establishing engineering standards within a team ServiceNow certifications are highly preferred (e.g. ...

fault-tolerant software. Proficient understanding of Git and CI/CD. Good understanding of Databases and data architecture. Experience with API development (REST, GraphQL, etc) Nice to have Experience in using web frameworks (Django). Experience working on B2B product features Experience working with OCPI Experience integrating third-party ...

internal and external users Preferred Qualifications Experience with large-scale financial tracking systems Good understanding and practical knowledge in cloud based services (e.g. gRPC, GraphQL, Docker/Kubernetes, cloud services such as AWS, etc.) In-office expectations Office-assigned Stripes in most of our locations are currently expected to spend ...

Tester, or SDET within a modern digital platform or e-commerce marketplace landscape. API Engineering Validation: Proven expertise checking, mocking, and mapping RESTful or GraphQL API environments with specialized toolsets like Postman. Agile Systems Alignment: Strong background working inside structured Agile/Scrum environments, actively steering sprint reviews, bug grooming ...

broader customer data and identity stack. Strong grasp of client‐side integration nuances: mobile and web SDKs, push notification frameworks, webhooks, and REST or GraphQL APIs, including how they hold up under enterprise scale and multi‐region deployments. German language proficiency. Not required, but useful for DACH market conversations. Experience ...

agents. Develop agent-to-agent connectivity, including message contracts, state management, retries and failure handling. Design clear, scalable APIs using REST and/or GraphQL, including authentication, authorisation, versioning and streaming interfaces such as SSE or WebSockets. Build production frontend applications using React, TypeScript and JavaScript. Work closely with … backend and integration development. Strong TypeScript/JavaScript and React experience building production applications. Strong API design experience, including REST and/or GraphQL, authentication, authorisation, versioning and streaming. Hands-on experience with MCP (Model Context Protocol) or comparable tool/plugin integration technologies, alongside an interest in AI agents ...

platform and seeks engineers who own problems end to end. You'll work on a modern serverless stack with TypeScript, React, AWS, and GraphQL, shipping features that touch millions of patients through a national health system. We value raw horsepower, strong CS fundamentals, and the ability to move between frontend ...

Full Stack Engineer to join our cross-functional team. You’ll own features end-to-end, from the React/TypeScript UI to the GraphQL/API layer and backend services, in a fast-paced environment. You’ll contribute to AI-enabled workflows, ship daily behind feature flags, and collaborate ...

rota during working hours. Требования 5+ Years of professional frontend engineering experience; Strong experience with modern JavaScript/TypeScript and React; Experience working with GraphQL and REST APIs; Experience writing unit tests; Ability to leverage AI coding tools for rapid iteration; Security awareness and comfort operating across the full frontend ...

Firebase or similar) Backend and API Tracing a request from UI through the mobile networking layer to the backend service and back REST/GraphQL/gRPC, OpenAPI and contract inspection, API gateway and BFF patterns OAuth 2.0/OIDC token flows as implemented on device Third-party SDK inventory ...

scalable, performant sites that handle high levels of traffic well Desirable: energy domain knowledge Our stack React (required) TypeScript (required) Next.js on Vercel (desirable) GraphQL w/Tanstack Query (desirable) React Testing Library & vitest and/or msw (desirable) We have a preference for candidates who can work hybrid from ...

stakeholders Technical Experience: Experience building and architecting systems, including some of: Architecting solutions on AWS Finance and billing platforms API technologies such as GraphQL and webhooks Customer‐Centric & Analytical: Focused on solving the right problems and using data to measure success Agile & Autonomous: Comfortable navigating ambiguity in a fast‐paced ...

system evolution. Ability to develop a deep understanding of unfamiliar codebases and turn investigation into sound engineering decisions. Experience designing client‐facing REST and GraphQL APIs, with sound judgment about business‐logic placement, product states, and backward compatibility. Understanding of how mobile lifecycle and network constraints affect backend design. Strong ...

strong accessibility guidelines Experience building scalable, performant sites that handle high levels of traffic well Our stack... React TypeScript (desirable) Next.js on Vercel (desirable) GraphQL w/Apollo (desirable) React Testing Library & Playwright Why else you'll love it here... Wondering what the salary for this role is? Just ...

market teams. Degree in Computer Science or a related field, or equivalent professional experience. Even better... Hands-on experience with Go services, GraphQL APIs, or LLM infrastructure in production environments. Past experience at an early-stage company where you built deployment operations, playbooks, and tooling. Familiarity with observability and incident ...

market teams. Degree in Computer Science or a related field, or equivalent professional experience. Even better... Hands-on experience with Go services, GraphQL APIs, or LLM infrastructure in production environments. Past experience at an early-stage company where you built deployment operations, playbooks, and tooling. Familiarity with observability and incident ...

backend or frontend, plus enough range to work confidently across the others. Our technology stack consists of: React Native mobile applications React web applications GraphQL layer using Apollo Server and Apollo Client Python services running Flask and FastAPI Kubernetes based microservice architecture running on Google Cloud Platform Cloud Postgres … three areas above that isn't your main one Docker and containerised applications Building and consuming REST and GraphQL APIs Kubernetes, Terraform, or GCP Experience working with AI coding agents IoT and distributed connected hardware in the real world What we are offering in return The chance to build ...

React, Redux, ReactQuery Experience with modern JavaScript frameworks - React Knowledge of version control systems (Git) Understanding of cross-browser compatibility Familiarity with RESTful APIs, GraphQL and Websockets Experience with CSS pre-processors e.g. Tailwind Back-end skills Proficiency in backend programming languages (Typescript and/or other OOP language such … c#/Java) Strong database knowledge (SQL and NoSQL) Proficiency with RESTful APIs and GraphQL APIs and Websockets Experience with microservices architecture Knowledge of version control systems (Git) Experience with Terraform Experience with automated testing Experience with AWS (AWS Lambda, AWS Fargate, Amazon API Gateway, AWS AppSync) Worked within ...

charging platform, focusing on scalable, observable systems. You should have 2+ years Python experience, strong Git/CI/CD, API development (REST/GraphQL), and knowledge of databases. We value collaborative problem-solving and the ability to translate product needs into solid technical solutions. #J-18808-Ljbffr ...

tooling. You should have 7+ years as a Front-End Engineer, mastery of React 18+ with TS, Redux/MobX/Zustand, REST/GraphQL, and experience with RN and RN SDKs. Expect a fast-paced, international team with a flexible, autonomous culture. #J-18808-Ljbffr ...

devices. Join a fast‐growing, tech‐driven retail group and shape how millions interact with our ecosystem using React Native or Flutter, REST/GraphQL, and modern deployment #J-18808-Ljbffr ...

data flows. This is an in‐person role based in London. Technology Stack Our stack is Python (backend), React (frontend), Prefect (orchestration), and GraphQL (API layer). You don't need to be an expert in all of these, but Python proficiency is required and you should be comfortable picking ...

mobile apps that real users depend on. Strong with React Native or Flutter (native iOS/Android a plus). Experience integrating REST/GraphQL APIs, payments, maps, and real-time features. A feel for mobile UX and an eye for detail. Self-directed, curious, and comfortable owning whole features. ...