1 to 25 of 48 GraphQL Jobs in London

collaboration Back-end Experience with some of the following, or a strong willingness to learn: Node.js – building scalable, maintainable services APIs – RESTful design (GraphQL a plus), authentication, validation, rate limiting Databases – PostgreSQL/MySQL, schema design, indexing, query optimisation ORMs – Sequelize or similar (migrations, associations, transactions) Business logic – handling payments ...

workflows where permitted; govern enterprise knowledge ingestion. Architecture & Integration: Distributed systems, microservices, cloud‐native (Azure/AWS/GCP); secure API design (REST/GraphQL). MLOps & AIOps: CI/CD for AI, model lifecycle (eval, versioning, rollout/rollback), guardrails, telemetry, drift monitoring, prompt safety. DevSec & Responsible AI: Privacy ...

blockchain with web apps (wallets, APIs, indexing services). Strong understanding of security, scalability, and distributed systems. Technical Competencies TypeScript/JavaScript, REST/GraphQL APIs CI/CD pipelines and DevOps tooling Cloud security, identity, and access management Blockchain tooling (Hardhat, Foundry, Web3.js/Ethers.js or similar) Nice ...

high-quality React Native application. Architect scalable mobile solutions that meet the demands of financial applications (security, performance, reliability). Integrate with RESTful and GraphQL APIs and collaborate closely with backend teams. Optimize app performance, including memory usage, load times, and smooth UI interactions. Implement high-security standards such ...

Full Stack Engineer - GraphQL - TypeScript | Cloud-Native | Contract (Outside IR35) 📍 West London HQ | Hybrid (2 days on site) | Outside IR35 | 6-month initial contract (extensions likely) GraphQL Full Stack Engineer - TypeScript | Cloud-Native | Contract (Outside IR35) Location: West London (Hybrid - 2 days/week on site) Contract: 6 months initial … extensions highly likely) GraphQL-focused Full Stack Software Engineer who can design, implement, and evolve high-performing APIs that scale. If crafting elegant GraphQL schemas, building robust TypeScript/Node.js services, and deploying to cloud-native environments is your idea of fun, this is your next project. Suited ...

evolution of our mobile technology stack. What You'll Do Build and maintain a high-quality React Native application. Integrate with RESTful and GraphQL APIs. Diagnose, debug, and resolve issues across the mobile stack, ensuring a smooth and reliable user experience. Participate in code reviews, offering constructive feedback and helping ...

systems supporting Rates & FX platforms. Key Skills Required: Strong C#/.NET Core expertise Experience with distributed, event-driven, cloud-native architectures REST/GraphQL API development AWS or Azure cloud deployment Relational databases (MSSQL/MySQL) Proven experience leading engineering teams in Agile environments Exposure to trading systems ...

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 ...

Agile environment Strong expertise in C# and modern .NET/.NET Core Experience building distributed, event-driven systems API design and development (REST, GraphQL) Relational databases (SQL Server, MySQL, or similar) Cloud platforms such as AWS or Azure Solid understanding of the full software development lifecycle Pragmatic, delivery-focused approach ...

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 ...

authentication flows, with the ability to assess design options and advise teams on integration approaches rather than implementing directly * Familiarity with RESTful and GraphQL API consumption and integration, including security considerations and cloud-native architectures (Azure preferred) * Working knowledge of architecture patterns, performance optimisation strategies, and security best practices * Awareness ...

pipelines and DataDog monitoring. Your responsibilities include improving infrastructure performance and reliability, driving modernization and cost optimization, developing shared components (i.e. auth systems, GraphQL gateways), enhancing developer experience, maintaining E2E testing systems, and creating internal tooling. This is an opportunity to solve challenging scale problems while shaping the technical foundation ...

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 ...

models. Learn, use, and improve best practices and processes for high-quality software development. Our technology stack includes Python 3.11, PostgreSQL, Django, mypy, GraphQL, Docker, Redis, Typescript, React. Qualifications We’re only considering exceptional candidates, with the following pre-requisites: 5+ years of professional software development experience. 2+ years ...

stateless, SPA and others Advanced knowledge of React and React Native Eco system and AWS technology stack. Strong API/integration experience: REST/GraphQL, auth flows, contract design and resilience patterns Well versed in latest CI/CD practises and tools, deployment methodologies and experienced in tools to enforce ...

architecture, and performance optimization. Key Responsibilities Backend Development Develop and maintain scalable backend services using Go (Golang). Design and implement RESTful APIs and GraphQL endpoints. Build APIs for data ingestion and service-to-service communication. Write clean, maintainable, and efficient production-level code. Implement authentication and security best practices ...

with willingness to learn the other) Advanced experience in Java or Rust (with willingness to learn the other) Familiarity with Python RESTful API and GraphQL development Database design and optimization (Postgres, MySQL, Redis) Experience leveraging AI tools to accelerate development is a plus Soft Skills: Proven ability to lead complex ...

105k | Lead - up to 125k Location : East/Central London (x4 days per week onsite) Tech stack includes : NodeJS, TypeScript, React, PostgreSQL, GraphQL, AWS, GitHub Actions, Pulumi. Current team size : x2 Engineers (plan is to grow to 4 in total) We're working with a profitable Tech4Good startup company, their ...

real momentum Technical skills required: Strong TypeScript across both frontend and backend (Node.js) Modern frontend framework experience (React or similar) RESTful and/or GraphQL API design and development Database design and querying (SQL and/or NoSQL) Experience in regulated or data-sensitive industries a strong advantage (healthcare ...

software development lifecycle Write clean, maintainable, and high-quality code following best practices What We Need From You Strong experience with React, React Native, GraphQL, and REST APIs Solid understanding of web and mobile platforms, including performance optimization Knowledge of modern JavaScript (ES6+) and revision control systems Team player with ...

Forward Deployed, Solutions, or Full-Stack Engineering Strong Python expertise Proven experience delivering production solutions directly with customers Strong REST and/or GraphQL API experience Excellent problem-solving and systems thinking Strong communication skills in cross-functional environments Degree in Computer Science (or equivalent practical experience) The Profile ...

broader team to align on priorities You're not alone, but trusted to drive things forward The stack (high level) Backend: Node.js, PostgreSQL, GraphQL, TypeScript Frontend: SolidJS, TypeScript Infrastructure: AWS, Terraform Tools: Cursor, Linear, Notion, GitHub Preferred: TypeScript & Node.js experience But not mandatory: We care more about good engineering judgment ...

aligned with best practices Contribute to performance optimisation and secure coding standards Requirements Strong experience with React and/or React Native Experience with GraphQL and RESTful APIs Solid understanding of web fundamentals (DOM, CORS, browser storage, request/response lifecycle) Strong knowledge of mobile platforms, including native modules ...

Mobile architecture approaches and design patterns including micro front ends, module federation, stateless, SPA and others Strong API/integration experience: REST/GraphQL, auth flows, contract design and resilience patterns Well versed in latest CI/CD practises and tools, deployment methodologies and experienced in tools to enforce quality ...

tactical level, solve problems effectively, and come up with innovative solutions. Skills: Javascript, Typescript and React Native or React.js Next.js Typescript GraphQL CI/CD best practices Design systems (Storybook) Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants. ...