22 of 22 Permanent GraphQL Jobs in London

applications Building and maintaining high‐performance APIs and distributed microservices Solving problems around scalability, reliability, security, and automation Working with modern API protocols including GraphQL and gRPC Enhancing the platform that connects both traditional and on‐chain financial services Must‐have experience: Strong backend engineering background with deep coding experience ...

Behavior Driven Development (BDD) and Waterfall) Knowledge of any or all of the following technologies is desired: Kafka, Postgres, Golang, Git, gRPC, Docker, GraphQL Experienced in continuous integration (CI), continuous deployment (CD) and continuous testing (CT), including tools such as Jenkins, Rally and/or JIRA and version control such ...

well-tested, and well-documented code. Must‐Have Technical Skills Expert-level Node.js development experience (TypeScript/Javascript). Professional Golang development experience. Strong GraphQL experience, including schemas, resolvers, and high-volume queries. Deep knowledge of PostgreSQL, including performance tuning and relational design. Hands-on experience with Redis for caching ...

without prior trading/finance experience. Experience with writing unit and integration tests and maintaining CI/CD pipelines. Preferred Qualifications & Experience Experience with GraphQL or REST API development. Knowledge of asynchronous programming, message queues, or real-time streaming architectures. Familiarity with cloud platforms (AWS, GCP, Azure) and container orchestration ...

culture, encouraging peer to peer feedback and evolving healthy, curious and humble teams. Tech Stack: Python, Javascript/Typescript, React/React Native, AWS, GraphQL, Snowflake, Airflow, DDD. This is an incredible opportunity for a Senior Software Engineer to join a unique company as they embark on a period ...

with non-technical stakeholders. You’ll also have sound judgement when it comes to architecture decisions and balancing build versus buy. Nice to Haves GraphQL APIs Elasticsearch Data pipelines and warehousing Accessibility best practices Azure ecosystem depth Why Join/Projects You’ll lead the build of new digital tools ...

supporting infrastructure: git, microservices, containers, etc. Comfortable working with numbers and data, with or without prior trading/finance experience. Preferred Qualifications & Experience GraphQL/Apollo Client. Experience building Single Page Applications (SPAs). Reactive mobile UI development experience. Experience with Material UI or similar component libraries. Familiarity with WebSockets ...

versioning strategy, and cross-team adoption at scale - Testing discipline: unit, integration, E2E (Playwright/Cypress), visual regression, and performance budget enforcement in CI - GraphQL or REST API co-design with backend teams; schema-first development and automated type generation - Track record of measurably improving engineering standards - patterns or tooling ...

versioning strategy, and cross-team adoption at scale Testing discipline: unit, integration, E2E (Playwright/Cypress), visual regression, and performance budget enforcement in CI GraphQL or REST API co-design with backend teams; schema-first development and automated type generation Track record of measurably improving engineering standards - patterns or tooling ...

interfaces (20% of your time will be web-focused). Strong knowledge of JavaScript/TypeScript, ECMAScript standards, and modern frontend patterns. Experience with GraphQL and REST integrations. Understanding of web fundamentals (DOM, browser storage, CORS, performance). Comfortable working in cross‐functional teams with strong communication and delivery focus. ...

right questions, and making reasonable bets. Bonus Experience with IoT/telemetry, energy data, or time-series workloads Familiarity with event-driven architectures, GraphQL, Airflow, or Python Personal interest in energy, climate tech, or automation Track record of owning complex systems end-to-end 5+ years of experience This role ...

supporting the hiring of two senior fullstack engineers (70% ish front end) You'll: Lead development of high-performance Next.js applications Design scalable APIs (GraphQL a plus) Own code across the stack, with a strong focus on frontend (Don't worry if backend is not your biggest strength they work ...

Javascript/Web Components Tailwind (or familiarity with CSS frameworks) HTML (with best practices and accessibility in mind) Webpack/Vite REST/GraphQL APIs Shopify CLI Git Shopify Functions Checkout Extensibility Bonus Experience: Shopify App Development How to Apply: Interested? Great! Send a brief covering letter (email) along with ...

amazing opportunity! The following skills/experience is essential: Strong React Native development background Demonstrable experience delivering applications in both iOS and Android GraphQL and Restful APIs Solid understanding of the full mobile development life cycle Good communication skills Salary: Up to £95,000 + bonus + package Location: London ...

. Comfortable in a fast‐paced R&D‐driven environment. Bonus: exposure to logistics datasets or consultancy experience. Tech environment: GCP Python (Django beneficial) GraphQL React (handled mainly by engineering) Contract: 6 months (Inside IR35) Rate: £550-£650 p/d Start: ASAP Location: Remote (UK or Europe) This ...

genuinely influence both the technical direction and engineering culture. Responsibilities: Building production-grade applications using Next.js, React & TypeScript Designing and developing APIs (REST/GraphQL) Working across the full stack – frontend, backend, and cloud Owning features end-to-end (design build deploy) Contributing to architecture and best practices Collaborating closely … Strong Next.js/React/TypeScript background Experience building scalable web applications Solid understanding of SSR, SSG & frontend performance API development experience (REST or GraphQL) Cloud exposure (AWS preferred) + Docker Strong fundamentals (HTTP, DNS, etc.) Bonus points for: Go or C# backend experience Microservices/DevOps/CI/ ...

maintainability. Ensure high automation coverage across UI, API, and integration layers . API and Integration Testing Develop and maintain automated tests for RESTful APIs, GraphQL services, and distributed microservices . Validate service contracts, data integrity, and system interactions across complex integrations. Utilize tools such as Postman, SuperTest, or Playwright … Required Skills and Experience Strong hands-on experience with Playwright and JavaScript/Node.js or TypeScript for automation development. Proven experience testing REST APIs, GraphQL services, and microservice-based systems . Experience with API testing tools such as Postman or SuperTest and strong understanding of JSON schema validation . Hands ...

automation opportunities, serverless optimisation). Our software and data stack is: Python & JavaScript web application, deployed using CI/CD based on gitHub actions. GraphQL APIs, PostgreSQL database (RDS). Data processing pipelines using Argo Workflows and Metaflow, with SQS-based events. What we’re looking for: Must haves: Deep … priorities to deliver the best outcomes for the business (e.g., budget, security, developer experience). Is comfortable supporting our product & data stack (Python, JavaScrip, GraphQL, APIs, PostgreSQL database). A strong communicator, able to build strong relationships with technical and non-technical stakeholders, being a supportive team member, enjoying working ...

modern JavaScript (ES6+). Proven experience with state‐management libraries (e.g., Redux, Zustand). Solid experience integrating front‐end apps with RESTful APIs, (GraphQL is a bonus). Experience with testing frameworks (e.g., Jest , React Testing Library ). Comfortable with CI/CD pipelines, version control ( Git ), modern build tools … side rendering or static site generation (Next.js). Exposure to AI/ML integrations or advanced analytics in a front‐end context. Familiarity with GraphQL or micro‐frontend architectures or enterprise‐grade front‐end tooling. What We Offer Salary: £70,000 – £75,000 + equity participation. Hybrid working model ...

scalable solutions. Leveraging modern commerce ecosystems, including headless commerce platforms. Working confidently with state management tools like Redux or similar patterns. Integrating and consuming GraphQL and RESTful services to power rich user experiences. Rapidly shaping UI concepts through prototypes and iterative design. Ensuring reliability through comprehensive unit testing … attitude. A hands-on, problem-solving approach paired with genuine accountability. Tech Stack You'll Work With Required: React Native, JavaScript, JS frameworks, Redux, GraphQL, AEM, Storybook, Chromatic, TypeScript, UI frameworks Nice to Have: Next.js, Angular, caching technologies, Adobe Experience Manager Why This Role? This is an opportunity to lead ...

with cry state management (NgRx/Signals), routing, forms, component composition, and performance concepts. 5+ years of experience with Node.js, building APIs. Knowledge of GraphQL is a plus. Familiarity with backend concepts such as RESTful APIs, database design, server-side logic, and API security. Strong communication skills and a collaborative … driven approaches, aligning engineering decisions with measurable impact. Preferred: Experience building interactive and responsive dashboards with near-time and streaming data. Interest in learning GraphQL federation, persisted queries, and client caching strategies (Apollo). Knowledge of Azure technologies, Web Apps, API-M, IoT Hub, and Event Hub is a plus. ...

COSTAR GROUP - SENIOR SALES ENGINEER, MATTERPORT - LONDON OVERVIEW CoStar Group (NASDAQ: CSGP) is a leading global provider of commercial and residential real estate information, analytics, and online marketplaces. Included in the S&P 500 Index ...