23 of 23 WebSockets Jobs in the City of London

Javascript, Typescript, HTML, and CSS 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 as Lovable, Bolt, or Cursor as More ❯

Javascript, Typescript, HTML, and CSS 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 as Lovable, Bolt, or Cursor as More ❯

backend (Python/Java/Go) 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 and deployed services on More ❯

backend (Python/Java/Go) 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 and deployed services on More ❯

or gaming/immersive/AI). Strong experience with real-time databases , data telemetry, and scalable backend systems. Strong backend expertise (Node.js, Python, Postgres/Supabase, REST/WebSockets). Strong frontend skills (React/Next.js, TypeScript, Tailwind). Comfort with 3D/real-time visualization frameworks (WebGL,Three.js) Familiarity with AI/ML integrations (OpenAI, Gemini, RAG pipelines More ❯

/Java/Go + 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) Built and deployed services on More ❯

/Java/Go + 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) Built and deployed services on More ❯

and co-designing production-grade RESTful APIs ideally with an API-first approach. Strong knowledge of frontend polling and other async interactions patterns such as: polling/SSE/WebSockets for long-running tasks, optimistic updates, progress states, idempotent actions. Proficiency in integration, component and unit testing, with a strong commitment to code quality and maintainability. Strong knowledge of DevOps More ❯

and co-designing production-grade RESTful APIs ideally with an API-first approach. Strong knowledge of frontend polling and other async interactions patterns such as: polling/SSE/WebSockets for long-running tasks, optimistic updates, progress states, idempotent actions. Proficiency in integration, component and unit testing, with a strong commitment to code quality and maintainability. Strong knowledge of DevOps More ❯

experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis , and high-performance data systems Strong DevOps mindset — CI/CD, infrastructure as code, observability (Grafana, Prometheus, OpenTelemetry) Exceptional communicator, able to influence architecture and More ❯

experience, ideally at Staff/Principal/Tech Lead level Expert-level proficiency with Golang in production Proven track record designing distributed systems and event-driven architectures (Kafka, RabbitMQ, WebSockets) Deep understanding of PostgreSQL , Redis , and high-performance data systems Strong DevOps mindset — CI/CD, infrastructure as code, observability (Grafana, Prometheus, OpenTelemetry) Exceptional communicator, able to influence architecture and More ❯

years commercial experience with Flutter 1+ years leading technical teams of 3-5 (will consider mentorship experience) Deep Flutter expertise: architecture, state management, testing, deployment Solid backend integration (REST, WebSockets, microservices) Experience with Firebase, AWS, and CI/CD pipelines This role can offer up to £100,000, requires 4-days per week onsite in central London, and is made More ❯

years commercial experience with Flutter 1+ years leading technical teams of 3-5 (will consider mentorship experience) Deep Flutter expertise: architecture, state management, testing, deployment Solid backend integration (REST, WebSockets, microservices) Experience with Firebase, AWS, and CI/CD pipelines This role can offer up to £100,000, requires 4-days per week onsite in central London, and is made More ❯

where engineering excellence and code quality are non-negotiable 🛠️ Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) ✅ What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performance More ❯

where engineering excellence and code quality are non-negotiable 🛠️ Tech Stack: Languages: TypeScript, JavaScript (ES6+) Frameworks: React, Redux (or similar) Tooling: Webpack, Babel, Jest, ESLint, Git Bonus: Experience with WebSockets, performance profiling, or custom charting libraries (e.g., D3.js, Highcharts) ✅ What They’re Looking For: Strong experience with React and modern JavaScript/TypeScript Deep understanding of front-end architecture, performance More ❯

define and evolve a robust 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, coroutines, memory, and threading Familiarity More ❯

define and evolve a robust 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, coroutines, memory, and threading Familiarity More ❯

This is an opportunity for a technical problem solving SRE to join a leading global fintech who are currently growing their presence in Europe. Role Responsibilities; Investigate, troubleshoot and diagnose incidents Provide first-third line investigation and diagnosis of incidents More ❯

This is an opportunity for a technical problem solving SRE to join a leading global fintech who are currently growing their presence in Europe. Role Responsibilities; Investigate, troubleshoot and diagnose incidents Provide first-third line investigation and diagnosis of incidents More ❯

Job Role: Product Engineer (backend C# .net core) Reference: BH-355p Job Type: Permanent Location: Hybrid, West Hampstead, London (2 days/week in-office) Salary: up to £75-£85k per annum About The Client: Our client builds AI-driven More ❯

Job Role: Product Engineer (backend C# .net core) Reference: BH-355p Job Type: Permanent Location: Hybrid, West Hampstead, London (2 days/week in-office) Salary: up to £75-£85k per annum About The Client: Our client builds AI-driven More ❯

Our client is a leading market making, high frequency trading, and multi-stage Web3 venture investment firm. They are now looking for a Senior and a Junior Rust Developer to be based in London. As a Rust Developer, you will More ❯

Our client is a leading market making, high frequency trading, and multi-stage Web3 venture investment firm. They are now looking for a Senior and a Junior Rust Developer to be based in London. As a Rust Developer, you will More ❯