1 to 25 of 37 Remote/Hybrid WebSockets Jobs in London

Senior Front-End Developer (React, TypeScript) - VP, FX Options Pricing

Location
Greater London, England, United Kingdom
Vue.js would also be considered). Inter-Application Communication: Solid understanding of building applications that handle real-time data, using technologies like REST APIs, WebSockets, or middleware (e.g., Solace, Kafka, TIBCO). Engineering Excellence: Proficiency in modern software engineering practices, including CI/CD, automated testing, application resiliency, performance profiling ...

Senior Front-End Developer (React, TypeScript) - VP, FX Options Pricing

Hiring Organisation
Citigroup
Location
London, United Kingdom
Salary
£ 80 K
Vue.js would also be considered).Inter-Application Communication: Solid understanding of building applications that handle real-time data, using technologies like REST APIs, WebSockets, or middleware (e.g., Solace, Kafka, TIBCO).Engineering Excellence: Proficiency in modern software engineering practices, including CI/CD, automated testing, application resiliency, performance profiling, and telemetry.Desirable ...

Product Engineering - Team Lead

Location
Greater London, England, United Kingdom
data pipelines using languages such as Node.js, Python, Go, or similar. Solid understanding of end‐to‐end system architecture: APIs, microservices, event‐driven architectures, WebSockets, message queues, databases, and how frontend and backend systems work together in high‐performance environments. Experience with infrastructure and DevOps fundamentals: CI/CD, cloud ...

Product Engineering - Team Lead

Location
Greater London, England, United Kingdom
data pipelines using languages such as Node.js, Python, Go, or similar. Solid understanding of end‐to‐end system architecture: APIs, microservices, event‐driven architectures, WebSockets, message queues, databases, and how frontend and backend systems work together in high‐performance environments. Experience with infrastructure and DevOps fundamentals: CI/CD, cloud ...

VP Lead Engineer

Hiring Organisation
INTEC SELECT LIMITED
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£120,000 - £130,000 per annum
technical leader, raising the bar across engineering standards and design decisions Tech Environment Java | React (Vite, NX) | Kafka/Solace/RabbitMQ | WebSockets/SSE | Rx | Kubernetes | SQL About You You are a strong technologist and technical leader with a passion for building high-performance systems in complex environments. ...

AI Engineer (Fluent in Mandarin & English)

Hiring Organisation
Chubb
Location
London, United Kingdom
Salary
£ 80 K
First Token) and maximize throughput. This includes implementing quantization, caching strategies, and efficient batching.Production Engineering: Build and maintain real-time AI pipelines using WebSockets and SSE, ensuring seamless low-latency delivery for voice (ASR/TTS) and text applications.Architecture & MLOps: Deploy and orchestrate models within containerized microservice architectures (Docker/ ...

AI Engineer (Fluent Portuguese & English)

Hiring Organisation
Chubb
Location
London, UK
Employment Type
Full-time
First Token) and maximize throughput. This includes implementing quantization, caching strategies, and efficient batching. Production Engineering: Build and maintain real-time AI pipelines using WebSockets and SSE, ensuring seamless low-latency delivery for voice (ASR/TTS) and text applications. Architecture & MLOps: Deploy and orchestrate models within containerized microservice architectures ...

AI Engineer (Fluent in Mandarin & English)

Location
Greater London, England, United Kingdom
First Token) and maximize throughput. This includes implementing quantization, caching strategies, and efficient batching. Production Engineering: Build and maintain real-time AI pipelines using WebSockets and SSE , ensuring seamless low-latency delivery for voice (ASR/TTS) and text applications. Architecture & MLOps: Deploy and orchestrate models within containerized microservice architectures ...

Front End Engineer

Hiring Organisation
Interactive Brokers
Location
London, United Kingdom
Salary
£ 80 K
experience is a strong plus A solid grounding in core computer science fundamentals: data structures, algorithms and system design Experience with real-time data (WebSockets, SSE or similar) is a significant advantage in this role Good to have experience with AG Grid, Prime Vue, UI state management systems such ...

Senior Frontend Developer

Location
Greater London, England, United Kingdom
source maps Experience within regulated financial services, KYC/KYB or client onboarding Storybook or another documented component library Real-time updates using WebSockets or SignalR Experience within payments, FX, banking, KYC/KYB, client onboarding or other financial systems would be useful, but isn't essential. ...

Senior UI Engineer

Hiring Organisation
McGregor Boyall
Location
London, United Kingdom
Salary
£ 100 K
updates and deep linking.Integrate AI-powered features via backend APIs.Optimise startup time, memory usage and overall performance.Manage local state and message history efficiently.Work with WebSockets and other real-time technologies.Troubleshoot complex desktop and production issues.What We're Looking ForStrong software engineering background.Proven experience building production Electron applications.Strong JavaScript/TypeScript ...

Back-End Engineer, Trading

Location
Greater London, England, United Kingdom
Professional experience building backend services, ideally in Kotlin and/or Python. Solid experience designing and building backend services and REST APIs; experience with WebSockets or other real-time streaming protocols such as NATS/JETSREAM is a plus. Working knowledge of SQL and experience integrating with multiple internal ...

Back-End Engineer, Trading

Hiring Organisation
Blockchain
Location
London, United Kingdom
Salary
£ 80 K
WILL NEEDProfessional experience building backend services, ideally in Kotlin and/or Python.Solid experience designing and building backend services and REST APIs; experience with WebSockets or other real-time streaming protocols such as NATS/JETSREAM is a plus.Working knowledge of SQL and experience integrating with multiple internal or third ...

Senior Software Engineer | Voice | Full-Stack

Location
Greater London, England, United Kingdom
comfortable prototyping a feature in the morning and refactoring it for scale in the afternoon. Depth in real time systems. Real experience with WebRTC, WebSockets, streaming architectures or latency sensitive systems in production, and a working understanding of where the time actually goes. Full stack fluency with real range. React ...

Senior Software Engineer | Voice | Full-Stack

Hiring Organisation
DeepL
Location
London, United Kingdom
Salary
£ 80 K
comfortable prototyping a feature in the morning and refactoring it for scale in the afternoon.Depth in real time systems. Real experience with WebRTC, WebSockets, streaming architectures or latency sensitive systems in production, and a working understanding of where the time actually goes.Full stack fluency with real range. React and TypeScript ...

Front End Engineer

Location
Greater London, England, United Kingdom
experience is a strong plus A solid grounding in core computer science fundamentals: data structures, algorithms and system design Experience with real-time data (WebSockets, SSE or similar) is a significant advantage in this role Good to have experience with AG Grid, Prime Vue, UI state management systems such asPina ...

Senior Full-Stack Engineer

Location
Greater London, England, United Kingdom
Redis Understanding of cloud services (AWS, Vercel, or similar) Excellent problem‐solving and communication skills Nice to Have Experience with real‐time systems and WebSockets Knowledge of payment processing (Stripe) Previous experience in ticketing or events industry Contributions to open‐source projects Benefits Competitive salary with equity options. Flexible hybrid ...

Frontend Developer (Vue.js & React)

Location
Greater London, England, United Kingdom
into user interfaces Ability to use development tools effectively Nice to Have Experience with Inertia.js or Livewire Knowledge of Next.js or Nuxt.js Experience with WebSockets and real-time applications Understanding of web accessibility (WCAG) standards Experience with testing frameworks (Jest, Vitest, Cypress) Familiarity with UI/UX design principles Experience ...

Senior Software Engineer

Hiring Organisation
Hackajob Ltd
Location
London, United Kingdom
Employment Type
Permanent, Work From Home
hackajob is partnering directly with Zaizi to hire for this role. We are seeking a Senior Full Stack & Systems Engineer to join our Defence delivery team. This is a versatile, high-impact role designed for ...

FX Client Platforms - Senior UI Software Engineer (Vice President)

Location
Greater London, England, United Kingdom
FX Client Platforms - Senior UI Software Engineer (Vice President) About the Role We are seeking a Senior Applications Developer to join a team delivering pricing solutions for the Foreign Exchange (FX) business. You will cover ...

Front End Developer - React, RxJS, Typescript, Websockets, EDA

Hiring Organisation
Hays Technology
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £800/day £700-£800
Front End Developer - React, RxJS, Typescript, Websockets, EDA Working with a global financial services organisation who are looking for a Front-End Developer with expertise in React, RxJS, Typescript, Websockets and Event Driven Development (EDA) t o join a small, collaborative team responsible for building a modern trading application …/day Inside IR35 via Umbrella Skills and Experience Required Frontend: Proven experience as a Front-End Developer with expertise in React, RxJS, Typescript, Websockets and Event Driven Development (EDA) Real-Time: Experience with Real-time Data. Stakeholder Management: Interface with project stakeholders to gather requirements and build solutions that ...

Front End Developer - React, RxJS, Typescript, Websockets, EDA

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£700.00 - £800.00 per day
Front End Developer - React, RxJS, Typescript, Websockets, EDA Working with a global financial services organisation who are looking for a Front-End Developer with expertise in React, RxJS, Typescript, Websockets and Event Driven Development (EDA) t o join a small, collaborative team responsible for building a modern trading application …/day Inside IR35 via Umbrella Skills and Experience Required Frontend: Proven experience as a Front-End Developer with expertise in React, RxJS, Typescript, Websockets and Event Driven Development (EDA) Real-Time: Experience with Real-time Data. Stakeholder Management: Interface with project stakeholders to gather requirements and build solutions that ...

Senior Consultant, AI Agents Junior Developer FDE, SAP+ Design & Innovation

Hiring Organisation
Deloitte
Location
London, United Kingdom
Salary
£ 80 K
Basic informationLocationBristol, Edinburgh, Glasgow, London, ManchesterBusiness LineTechnology & TransformationJob TypePermanent/FTCDate published18-Sep-2026Req #24948Job descriptionConnect to your IndustryJoin our high-growth SAP+ Design & Innovation team at the forefront of how organisations harness cutting-edge ...

Full Stack Engineer

Location
Greater London, England, United Kingdom
About Wintermute Wintermute is one of the largest crypto native algorithmic trading companies in digital assets. We provide liquidity across most cryptocurrency exchanges and trading platforms, a broad range of OTC trading solutions as well ...

Principal Java Engineer - Backend Platform

Location
Greater London, England, United Kingdom
Principal Java Engineer - Backend Platform Salary: £76,340 - £100,340 Per Annum Contract: Full-Time, Permanent Location: Hybrid - minimum 2 days per week in office, Basingstoke/London/Bristol About the Role The Principal ...