21 of 21 Permanent WebSockets Jobs in England

Frontend Engineer

Hiring Organisation
algo1
Location
London Area, United Kingdom
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 ...

Full Stack Engineer

Hiring Organisation
algo1
Location
City of London, London, United Kingdom
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 ...

Senior Full-Stack AI Engineer — Frontend & LLM-Enabled UX (Level 3)

Hiring Organisation
Allegis Global Solutions
Location
London, England, United Kingdom
components and design systems (component libraries, theming, design tokens) to ensure consistent product quality and fast iteration. Implement real-time and progressive UX patterns (WebSockets, SSE, streaming LLM responses, optimistic updates, incremental rendering) that make AI interactions feel fast and human-centered. Collaborate on frontend work with UX designers ...

React Frontend UI Developer - Fixed Income & Credit Trading

Hiring Organisation
Vertus Partners
Location
London, United Kingdom
Employment Type
Permanent
Salary
GBP 75,000 - 100,000 Annual
system design Must have experience working in a trading environment ideally within Fixed Income, Credit or Rates. Experience integrating Real Time data feeds (eg WebSockets, streaming APIs) Please submit your CV if you have the relevant technology and business skills. ...

Full Stack Developer - React + Python - Trading Technology

Hiring Organisation
Vertus Partners
Location
City of London, London, United Kingdom
must be comfortable facing to the traders and quants. Required skills: Full stack development experience using React + Python React: AG Grid, Charting, WebSockets and data visualisation Python: Core Python experience around multi-processing and async programming Data: Experience building data heavy trading applications System design and architecture Domain knowledge ...

Associate Software Engineer

Hiring Organisation
X-On Health
Location
Woodbridge, Suffolk, East Anglia, United Kingdom
Employment Type
Permanent
Salary
£35,000
experience interacting with LLM APIs (OpenAI, Anthropic, etc.) and understanding concepts like Context Windows, RAG, System Prompts, and Temperature Concurrency: Understanding of asynchronous programming (WebSockets, goroutines) is highly beneficial given the real-time nature of voice data Benefits: 25 Days Holiday Birthday Day Off Buy Holiday Scheme Cycle to Work ...

Junior AI Software Engineer

Hiring Organisation
X-On Health
Location
Woodbridge, Suffolk, East Anglia, United Kingdom
Employment Type
Permanent
Salary
£35,000
experience interacting with LLM APIs (OpenAI, Anthropic, etc.) and understanding concepts like Context Windows, RAG, System Prompts, and Temperature Concurrency: Understanding of asynchronous programming (WebSockets, goroutines) is highly beneficial given the real-time nature of voice data Benefits: 25 Days Holiday Birthday Day Off Buy Holiday Scheme Cycle to Work ...

Senior React + Three.js Developer Interactive Installations

Hiring Organisation
FourPointZero
Location
East London, London, United Kingdom
Employment Type
Permanent
Salary
£90,000
Experience with kiosk deployments (offline-first, auto-restart, watchdog patterns, it just runs) Multi-display or large-format screen experience Sensors/OSC/websockets/unusual inputs Any museum, exhibition, experiential, themed environment, or live events background This is an exciting opportunity to join a busy company with ...

Forward Deployed ML Engineer, Agents

Hiring Organisation
AION
Location
London, UK
About AION AION is building an interoperable AI cloud platform by transforming the future of high-performance computing (HPC) through its decentralized AI cloud. Purpose-built for bare-metal performance, AION democratizes access to compute ...

Senior Frontend Engineer

Hiring Organisation
Stratospherec Ltd
Location
Brighton, Brighton and Hove, East Sussex, United Kingdom
Employment Type
Permanent
Salary
£60000 - £80000/annum
applications. Strong experience in React and TypeScript Experience designing or contributing to complex, multi-component frontend architectures. Comfort working with real-time updates, websockets, or frequently changing backend data. Strong understanding of state management (Redux, Zustand, Recoil, Jotai, or similar). Ability to write clean, maintainable, scalable code. Strong attention ...

Android Developer - Test Automation

Hiring Organisation
Arrows
Location
London, England, United Kingdom
communication skills Nice to Have Video streaming experience (DASH/HLS) ADB protocol knowledge Experience with Swift, Go, TypeScript, or BrightScript Device farms, Docker, WebSockets If you are available for a contract role and have the required skills, please apply online ...

Senior Android Engineer

Hiring Organisation
algo1
Location
London Area, United Kingdom
product and design to turn complex technical capabilities into polished user interactions. Essential Qualifications: Experience with real-time protocols and data-heavy applications (e.g. WebSockets, gRPC, MQTT, SSE). Expert-level understanding of Android internals: concurrency, memory management, and the full lifecycle constraints. Proven track record of building resilient, offline ...

Senior Mobile Engineer

Hiring Organisation
AdvisoryAI
Location
City of London, London, United Kingdom
AdvisoryAI is building the AI co-pilot that's transforming wealth management. We automate the tedious middle-office work that buries financial advisors, freeing them to focus on what matters: their clients. Founded by Entrepreneur ...

Full Stack Developer (React / Next.js / AWS)

Hiring Organisation
Avanti
Location
St. Albans, Hertfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £50,000 per annum
The Opportunity We’re looking for a Full Stack Developer to join a fast-growing sports data technology company that builds real-time analytics and live streaming platforms for the sports and media industry. You ...

Senior Golang Engineer

Hiring Organisation
Orbis Group
Location
City of London, London, United Kingdom
Experience with relational + non-relational DBs (PostgreSQL + Redis = big plus) Solid testing mindset (unit, integration, E2E) Nice to have Experience with websockets/streaming/queues Real-time data platforms Interest in fintech/digital assets If you enjoy solving real-time, large-scale data challenges and want ...

Front End Developer

Hiring Organisation
Noir
Location
Newcastle Upon Tyne, Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £80,000 per annum
Front End Developer - FinTech - Newcastle (Tech stack: Front End Developer, React, TypeScript, Websockets, SignalR, Containers, Orchestration, UX, Usability, Programmer, Developer, Architect, Front End Developer) Our client is a cutting-edge FinTech company with a reputation for innovation and excellence. They design and build advanced trading and analytics platforms used globally … Science (essential). Strong recent experience with modern front-end frameworks, particularly React, alongside TypeScript. Background working with real-time communication tools such as Websockets or SignalR. Familiarity with containerisation and orchestration platforms. A genuine enthusiasm for creating clean, usable, and engaging interfaces. The confidence to collaborate across different teams ...

Site Reliability Engineer

Hiring Organisation
Global Fintech
Location
City of London, London, United Kingdom
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

Hiring Organisation
N P Associates
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £65,000 per annum
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/ ...

Senior Exchange Connectivity Engineer | Crypto

Hiring Organisation
Selby Jennings
Location
London Area, United Kingdom
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 ...

Senior Software Engineer

Hiring Organisation
Formula Recruitment
Location
City of London, London, United Kingdom
Senior Software Engineer (Node.js) London – Hybrid flexible Up to £80,000 + equity We’re currently partnered with a real-time sports data platform that is revolutionising how companies leverage data to empower their business. ...

Senior Software Engineer

Hiring Organisation
ScaleOps Search Ltd
Location
Reading, England, United Kingdom
Software Engineer (C++) – Media Infrastructure A leading organisation in live video production systems is seeking an experienced Software Engineer to join their engineering team. This company powers major global sporting events, news studios, and broadcast ...