76 to 83 of 83 GraphQL Jobs in London

shared transaction and ledger layer Supporting integration of newly acquired platform capabilities Designing APIs for frontend, mobile, and seller platform use cases (REST and GraphQL) Handling complex transaction logic including: Currency conversion Fees and commissions Reconciliation Refunds and adjustments Supporting region-specific requirements such as tax, shipping, and compliance Improving … multiple services, languages, and architectural patterns. The role combines hands-on ownership of backend services with architectural leadership responsibilities. Elixir and the Phoenix framework GraphQL PostgreSQL Redis WebSockets and Phoenix Channels for real-time communication Message-driven architectures and asynchronous processing patterns Cloud-native infrastructure supporting globally distributed workloads ...

reliable pricing calculations and promotions management. Contribute to Kafka-based event-driven architectures for high-volume price publishing and promotional capabilities. Design and evolve GraphQL APIs ensuring consistency, performance, governance, and exceptional developer experience. Build resilient, low-latency solutions using MongoDB, Redis, PostgreSQL, and distributed data architectures. Own complex backend … capabilities that enable multiple teams and products. Strong understanding of distributed systems, event-driven architectures, and asynchronous messaging patterns. Designed API-first platforms with GraphQL and REST-based services. Comfortable working with high-volume transactional systems where reliability, performance, and resilience are critical. Core Competencies Demonstrates expertise in designing ...

retrieval services, including error handling, reliability, and service interactions. Contribute to contract testing and service-level testing strategies across our REST and evolving GraphQL APIs. Integrate and maintain automated tests within CI/CD pipelines, supporting testing at multiple levels of the stack. Use observability tooling such as New Relic … ownership of assigned areas and continuously improve quality outcomes. Experience working in Agile/Scrum teams. Nice to Have Performance testing experience. Familiarity with GraphQL APIs and service-level or contract testing approaches. Experience testing shared services or internal platforms. Knowledge of Kubernetes (EKS). Interest in search ...

TypeScript, alongside knowledge of the full Software Development Life Cycle (SDLC). Remuneration is competitive, ranging between £110K and £120K. A good understanding of GraphQL or Neo4j is a significant advantage. #J-18808-Ljbffr ...

regular 1:1s, own performance and growth conversations, and participate in hiring.### Skills Required* Backend Systems* Web Platform* Data Platform* C#* .NET* SQL* GraphQL* REST APIs* Reporting Systems* AI Systems* Agentic Systems* Technical Leadership* People Management* Distributed Systems* Cloud* Physical Data Centers* Petabyte-scale Data* Machine Learning* Advanced Visualizations* Interactive … data platform of meaningful scale. Experience with C#/.NET and SQL is a strong plus, though not required. Experience designing or building GraphQL and/or REST APIs is a plus. Experience with reporting or scheduled-reporting systems is a plus. Experience building AI or agentic systems ...

records, and third-party clinical platforms New products and features as we expand into paediatric diagnostics, new respiratory conditions, and international markets RESTful and GraphQL APIs, microservices architecture, and event-driven messaging systems Infrastructure, deployment, and on-call support as needed - this is a small team and the role … care about code quality without needing a long list of specific tools You have worked with RESTful APIs and are familiar with GraphQL and asynchronous messaging patterns You can ramp up quickly in an unfamiliar or lightly-documented codebase, and you are comfortable operating with a high degree of autonomy ...

Principal Product Engineer, React Native Location: Nine Elms, London. Full time, hybrid with at least 3 days a week on site. You'll need the right to work in the UK and be based in ...

Senior Product Engineer, React Native Location: Nine Elms, London. Full time, hybrid with at least 3 days a week on site. You’ll need the right to work in the UK and be based in ...