76 to 100 of 177 WebSockets Jobs in the UK

Experience building real-time or streaming systems, or systems with very high throughput demands. Experience influencing the architecture and design of applications Tech Stack - Python, ReactJS, Kubernetes, APi's, websockets, AWS Staff Software Engineer | GO/Python | £600-£800/day | Outside IR35 More ❯

Python development background +2 years of RestAPI development + integration Modern JavaScript skills (Vanilla, React, Vue) Relational databases (PostgreSQL or MySQL) Git-based collaboration Nice to have Experience with WebSockets or real-time systems Exposure to AWS, GCP, or Azure Interest in creative coding, digital media, or interactive graphics About you Based within commutable distance of Sheffield Comfortable in a More ❯

modern JavaScript (ES6+) Proven experience 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 capital markets Experience in data More ❯

modern JavaScript (ES6+) Proven experience 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 capital markets Experience in data More ❯

modern JavaScript (ES6+) Proven experience 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 capital markets Experience in data More ❯

modern JavaScript (ES6+) Proven experience 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 capital markets Experience in data More ❯

modern JavaScript (ES6+) Proven experience 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 capital markets Experience in data More ❯

modern JavaScript (ES6+) Proven experience 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 capital markets Experience in data More ❯

Pre-trade analytics (liquidity/pricing/scenario/what-if) and risk calculation services used in real time on the desk. Low-latency data services and streaming APIs (WebSockets/gRPC etc.) for live market and risk data. High-performance trader-facing UIs: time series views, blotters, RFQ/axe views, portfolio & risk dashboards. End-to-end systems: you More ❯

Pre-trade analytics (liquidity/pricing/scenario/what-if) and risk calculation services used in real time on the desk. Low-latency data services and streaming APIs (WebSockets/gRPC etc.) for live market and risk data. High-performance trader-facing UIs: time series views, blotters, RFQ/axe views, portfolio & risk dashboards. End-to-end systems: you More ❯

Pre-trade analytics (liquidity/pricing/scenario/what-if) and risk calculation services used in real time on the desk. Low-latency data services and streaming APIs (WebSockets/gRPC etc.) for live market and risk data. High-performance trader-facing UIs: time series views, blotters, RFQ/axe views, portfolio & risk dashboards. End-to-end systems: you More ❯

Pre-trade analytics (liquidity/pricing/scenario/what-if) and risk calculation services used in real time on the desk. Low-latency data services and streaming APIs (WebSockets/gRPC etc.) for live market and risk data. High-performance trader-facing UIs: time series views, blotters, RFQ/axe views, portfolio & risk dashboards. End-to-end systems: you More ❯

Pre-trade analytics (liquidity/pricing/scenario/what-if) and risk calculation services used in real time on the desk. Low-latency data services and streaming APIs (WebSockets/gRPC etc.) for live market and risk data. High-performance trader-facing UIs: time series views, blotters, RFQ/axe views, portfolio & risk dashboards. End-to-end systems: you More ❯

of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background More ❯

of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background More ❯

of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background More ❯

of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background More ❯

of performance tuning and concurrency. Hands-on experience with Kubernetes , AWS , and modern cloud infrastructure . Proficiency with databases — schema design, performance optimization, and analytics. Familiarity with REST APIs , websockets, and authentication/security best practices. A disciplined engineering mindset — you think about reliability, maintainability, and long-term scalability. Nice-to-haves Experience with MLOps and model-serving infrastructure. Background More ❯

or Android (3+ years) Experience leading or mentoring engineers in a technical leadership role Deep understanding of Flutter architecture, state management, testing and deployment workflows Comfortable with REST APIs, WebSockets, microservices, Firebase and AWS Experience building CI/CD pipelines and working with tools like Git, Docker and Jenkins A collaborative communicator who enjoys solving complex technical challenges What’s More ❯

or Android (3+ years) Experience leading or mentoring engineers in a technical leadership role Deep understanding of Flutter architecture, state management, testing and deployment workflows Comfortable with REST APIs, WebSockets, microservices, Firebase and AWS Experience building CI/CD pipelines and working with tools like Git, Docker and Jenkins A collaborative communicator who enjoys solving complex technical challenges What’s More ❯

customer reasons. Help drive DevOps maturity: automate deployments, and monitor systems. Collaborate with stakeholders to influence product direction and operational strategies. Company Tech Stack: Backend: PHP(Laravel) APIs (OAuth) WebSockets Node.js (used in Electron apps) Frontend: PHP server-side rendering (Laravel Blade), Vue.js, Bootstrap, JavaScript Databases: MySQL (RDS), MSSQL Redis (ElasticCache) Heavy data compliance: audit logging, long-term data retention More ❯

experience (React 70%/Java 30%) Advanced React and TypeScript skills, with experience in UI re-writes Strong Java expertise Solid understanding of: Backend integrations, Messaging frameworks, REST APIs & WebSockets, Working with backend services in Java System design and architecture experience Experience building real-time, data-intensive trading applications Previous exposure to investment banking environments and client-facing roles If More ❯

or similar). A proven 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 , or other data-rich visualisations. More ❯

or similar). A proven 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 , or other data-rich visualisations. More ❯

or similar). A proven 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 , or other data-rich visualisations. More ❯