18 of 18 Permanent WebSockets Jobs in the City of London

Worked with a variety of storage technologies (eg. Postgres, Mongo, Redis, Object) Experience with async and bi-directional communication protocols and patterns (eg. WebSockets, SSE) Designed and implemented event-driven distributed systems (eg. Kafka/Pulsar, RabbitMQ, MQTT, or similar) Experience with container orchestration and service containerisation (Kubernetes, Docker) Built ...

Extensive experience with modern web frameworks and patterns (eg. React, Next.js, Tailwind) Experience with real-time and bi-directional communication protocols and patterns (eg. WebSockets, SSE) Built and deployed services on any major cloud providers' services (Azure, GCP, AWS) AI-Native development: fast iteration & prototyping using AI tools such ...

Redux, Apollo Client , and GraphQL/REST APIs . Experience working in a cloud-native environment ( AWS or Azure ). Familiarity with data streaming (WebSockets, chunked responses) and front-end performance optimisation . Strong understanding of testing frameworks (unit, integration, E2E) - Playwright experience a plus. Bonus points for knowledge ...

PostgreSQL) and NoSQL (MongoDB) databases. ● Utilize Prisma ORM for efficient database interactions. ● Develop and optimize RESTful APIs and GraphQL APIs (Apollo) . ● Implement WebSockets for real-time communication. ● Ensure API security using JWT, OAuth , and other authentication mechanisms. ● Perform unit testing with Jest or Mocha and API testing with Postman ...

Azure), and how front-end and backend services fit together in distributed systems. Strong understanding of front-end performance optimisation , including data streaming (WebSockets, server-sent events, chunked responses). Solid experience with testing strategies (unit, integration, E2E) – Playwright, Cypress or similar tools a plus. Bonus points for experience with ...

React) Worked with a variety of storage technologies (eg. Postgres, Mongo, Redis, Object) Experience with async and bi-directional communication protocols and patterns (eg. WebSockets, SSE) Designed and implemented event-driven distributed systems (eg. Kafka/Pulsar, RabbitMQ, MQTT, or similar) Experience with container orchestration and service containerisation (Kubernetes, Docker ...

delivering front-end applications in electronic trading environments Strong understanding of performance optimisation and low-latency UI design Experience with real-time data technologies (WebSockets, FIX, etc.) Familiarity with containerized front-end platforms such as OpenFin is a plus Prior exposure to Fixed Income products (Rates, Credit, Bonds) or other ...

testing and deployment strategies. 🔧 Tech Stack: Frontend: React (Remix, SSR, and modern frameworks) Backend: Node.js, REST APIs, JSON:API standards Realtime: WebSockets, CRDTs (Yjs) Tooling: Tiptap, ProseMirror, CLI, IDE extensions Infra: CI/CD pipelines, Kubernetes, AWS ✅ What You Bring: ~6+ years building complex products in collaborative, cross-functional teams. ...

track record of delivering polished, performant, and elegant user interfaces. Deep appreciation for UI/UX craftsmanship and accessibility. Familiarity with HTTP, REST APIs, websockets, and secure frontend patterns. A creative streak — you think visually and love turning complexity into clarity. Nice-to-haves Experience with 3D or WebGL rendering ...

seriously — every single day Tech Stack Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar state management) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: WebSockets, performance profiling, custom charting (D3.js, Highcharts) What They’re Looking For Deep expertise with React and modern TypeScript/JavaScript Strong architectural thinking, performance tuning ...

Full stack Python Developer – Sports betting Hedge fund – London Option to work from home up to 4 days a week or fully remote. Full stack Python Developer is required for a leading provider of sports ...

mobile architecture using modern patterns Work closely with design & product to ship polished, scalable user interactions Essential Qualifications: Experience with real-time protocols (eg. WebSockets gRPC, MQTT, SSE or similar) Experience with implementing on-device machine learning (eg. PyTorch Mobile, ML Kit, TensorFlow Lite) Strong understanding of Android performance: lifecycle ...

Senior React Engineer - £700 - £800 p/day – On-site (Central London) Overview We are hiring a Senior React Engineer to join a high-performance technology team within a leading financial services organisation operating in ...

Golang Software Engineer – Sports betting Startup– London *Please note this role cannot sponsor. Please do not apply if you are seeking sponsorship* Golang Software Engineer is required for a leading provider of sports betting brokerage ...

Support & DevOps Engineer A global fintech are seeking a proactive and technically adept Support & DevOps Engineer to maintain and enhance our production trading environment. This unique hybrid role blends BAU support responsibilities with advanced DevOps ...

Linux Systems Administrator - Intermediate - Financial/Banking Working in a busy and vibrant Financial/Banking environment, candidates will have a minimum of 2+ years Red Hat Linux systems Administration with some Scripting - Bash/ ...

📌 Role : Front-End Engineer within Quant/Research 📍 Location : London (Hybrid) 💰 Comp : Up to £175,000 + exceptional guaranteed bonus + full package 🏆 Company : Award-winning Quant Fund, founded by Computer Scientists Why this stands ...

We are working with a pioneering financial technology firm that is building a global institution for digital assets, designed from the ground up for market integrity and efficiency. Their disciplined, first-principles approach underpins everything ...