WebSockets Jobs in London

1 to 25 of 66 WebSockets Jobs in London

Full Stack Engineer (Team Lead)

London, UK
Hybrid / WFH Options
Evermore
capabilities. Experience with AI/ML integrations or recommendation systems. Expertise in Matrix/Synapse integration for real-time messaging and communication. Knowledge of WebSockets, real-time messaging, and event-driven architectures. Background in platform monetisation and payment integration. Strong familiarity with access control, authentication (OAuth, JWT), and data privacy More ❯
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Senior Software Engineer

London Area, United Kingdom
Intec Select
query optimisation Docker Experience in deploying/troubleshooting applications specifically in a Microsoft Azure environment (including SQL Azure, Web Apps, Service Bus) Azure DevOps Websockets/SignalR experience Experience with FIX protocol Package/Benefits: £100,000 - £120,000 Basic Salary 25 days annual leave A gym membership with one More ❯
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Senior Software Engineer

london, south east england, united kingdom
Intec Select
query optimisation Docker Experience in deploying/troubleshooting applications specifically in a Microsoft Azure environment (including SQL Azure, Web Apps, Service Bus) Azure DevOps Websockets/SignalR experience Experience with FIX protocol Package/Benefits: £100,000 - £120,000 Basic Salary 25 days annual leave A gym membership with one More ❯
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Senior Frontend Developer

London Area, United Kingdom
NJF Global Holdings Ltd
with Docker & Kubernetes What You’ll Need: Deep expertise in React, TypeScript & frontend architecture Strong problem-solving & performance optimization skills Experience with GraphQL, REST & WebSockets Excellent communication & ability to align tech with business goals What’s on Offer: Competitive salary + performance bonuses High-impact role with senior stakeholder exposure More ❯
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Senior Frontend Developer

london, south east england, united kingdom
NJF Global Holdings Ltd
with Docker & Kubernetes What You’ll Need: Deep expertise in React, TypeScript & frontend architecture Strong problem-solving & performance optimization skills Experience with GraphQL, REST & WebSockets Excellent communication & ability to align tech with business goals What’s on Offer: Competitive salary + performance bonuses High-impact role with senior stakeholder exposure More ❯
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DevOps Engineer - Infra Sec (Chinese Speaking)

London, United Kingdom
EEZE
in a similar role; candidates with more experience will be considered for Senior DevOps Engineer or DevOps Lead positions. Nice to have Experience with WebSockets and binary communication protocols, enhancing real-time data transfer capabilities. Strong understanding of scaling high-throughput, real-time applications in a cloud-native or distributed More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Frontend Developer

London Area, United Kingdom
GOAT Interactive
Requirements Commercial experience 2+ years JS, ES6+, Typescript OOP and SOLID principles; Reactjs, Angular, Webpack based web-applications; Familiarity with functional programming REST API, Websockets Reactive Programming (RXJS); Experience of using Test Frameworks (JEST) SCSS/BEM Performance Testing Experience with DevTools and Performance Improvements CI/CD GIT Cross More ❯
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Frontend Developer

london, south east england, united kingdom
GOAT Interactive
Requirements Commercial experience 2+ years JS, ES6+, Typescript OOP and SOLID principles; Reactjs, Angular, Webpack based web-applications; Familiarity with functional programming REST API, Websockets Reactive Programming (RXJS); Experience of using Test Frameworks (JEST) SCSS/BEM Performance Testing Experience with DevTools and Performance Improvements CI/CD GIT Cross More ❯
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Frontend Developer

London Area, United Kingdom
Referment
Familiarity with the React reconciliation process and browser debugging tools Experience in functional programming and Jest for testing Bonus Experience: Knowledge of RxJS, Node.js, WebSockets, Vite/ESBuild, Docker, and more Familiarity with back-end technologies such as C#, Kafka, and Snowflake This opportunity offers not just career growth, but More ❯
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Frontend Developer

london, south east england, united kingdom
Referment
Familiarity with the React reconciliation process and browser debugging tools Experience in functional programming and Jest for testing Bonus Experience: Knowledge of RxJS, Node.js, WebSockets, Vite/ESBuild, Docker, and more Familiarity with back-end technologies such as C#, Kafka, and Snowflake This opportunity offers not just career growth, but More ❯
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Senior Frontend Engineer

London, United Kingdom
MarketAxess Holdings Inc
/LESS/CSS-in-JS/Tailwind) Experience testing with Jest/React Testing Library Desirable experience with DevOps tools Desirable experience with Websockets Desirable experience with ES6, Styled Components, Material UI Desirable experience with OpenFin Desirable experience in Finance, specifically trading Familiar with Agile Methodology What You Can More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Python Developer

London, England, United Kingdom
Hybrid / WFH Options
Source Technology
experience (Oracle preferred) Comfort with Unix/shell scripting Agile mindset (Scrum, TDD, pair programming) Passionate problem solver & team player? Frontend experience: React, HTML5, Websockets Knowledge of Structured Products (Notes, Warrants, etc.) Location: Hybrid Be part of a team where your code actually matters . Ready to make an impact More ❯
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Python Developer

london, south east england, united kingdom
Hybrid / WFH Options
Source Technology
experience (Oracle preferred) Comfort with Unix/shell scripting Agile mindset (Scrum, TDD, pair programming) Passionate problem solver & team player? Frontend experience: React, HTML5, Websockets Knowledge of Structured Products (Notes, Warrants, etc.) Location: Hybrid Be part of a team where your code actually matters. Ready to make an impact? Apply More ❯
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Angular | Electron.js | Front Office | Inside IR35 | £800pd | 6 months | Hybrid

London Area, United Kingdom
Hybrid / WFH Options
VirtueTech Recruitment Group
/CD, and Agile/Scrum experience Nice to Have: Exposure to cross-asset trading environments (FX, Equities, Fixed Income, etc.) Experience with Node.js, WebSockets, or API gateway patterns Testing frameworks (Jasmine, Karma, Cypress) Contract Details: Inside IR35 6 months rolling contract Up to £800 per day Hybrid More ❯
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Angular | Electron.js | Front Office | Inside IR35 | £800pd | 6 months | Hybrid

london, south east england, united kingdom
Hybrid / WFH Options
VirtueTech Recruitment Group
/CD, and Agile/Scrum experience Nice to Have: Exposure to cross-asset trading environments (FX, Equities, Fixed Income, etc.) Experience with Node.js, WebSockets, or API gateway patterns Testing frameworks (Jasmine, Karma, Cypress) Contract Details: Inside IR35 6 months rolling contract Up to £800 per day Hybrid More ❯
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AWS Architect - Python, Angular

London Area, United Kingdom
Lorien
between business, product, and engineering teams. Nice-to-Have : Experience with Event-Driven Architecture using AWS services (SNS, SQS, EventBridge). Knowledge of GraphQL, WebSockets, or real-time data streaming. Exposure to DevOps and observability practices (e.g., Prometheus, Datadog, AWS CloudWatch, OpenTelemetry). Prior experience in leading distributed engineering teams. More ❯
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AWS Architect - Python, Angular

london, south east england, united kingdom
Lorien
between business, product, and engineering teams. Nice-to-Have : Experience with Event-Driven Architecture using AWS services (SNS, SQS, EventBridge). Knowledge of GraphQL, WebSockets, or real-time data streaming. Exposure to DevOps and observability practices (e.g., Prometheus, Datadog, AWS CloudWatch, OpenTelemetry). Prior experience in leading distributed engineering teams. More ❯
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Senior C++ Developer

London, United Kingdom
EEZE
Familiarity with Oracle databases or similar enterprise-level database systems is a plus. Proficient in Chinese is a plus. Nice to have Experience with WebSockets and binary communication protocols, enhancing real-time data transfer capabilities. Strong understanding of scaling high-throughput, real-time applications in a cloud-native or distributed More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Lead React Native Engineer

London, United Kingdom
Hybrid / WFH Options
Randstad (Schweiz) AG
DevTools), memory leaks, UI responsiveness, performance bottlenecks, app profiling. APIs & Data Handling: RESTful APIs, state management (Redux, Zustand, Recoil), offline storage, real-time data (WebSockets, Firebase, SignalR). Testing & Quality Assurance: Unit and integration testing (Jest, React Testing Library), UI testing (Detox/Appium), automated testing pipelines. Deployment & DevOps: CI More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Solution Architect, Real Time

London, United Kingdom
London Stock Exchange Group
snap and bulk content delivery. Technical: A deep hands-on understanding of infrastructure, hosting, cloud, Linux servers, databases, common API technologies and concepts including Websockets, Restful API's, FTP and VPN. Ability to respond positively to pressure and take a flexible approach to the dynamic, fast moving market data field. More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Full Stack Engineer

London Area, United Kingdom
Gravitas Recruitment Group (Global) Ltd
experience with prior startup exposure Proficiency in Python and JavaScript; familiarity with frameworks such as FastAPI, Express.js, and React Strong understanding of REST APIs, WebSockets, and webhook integrations Experience with Git and GitHub for collaborative development Knowledge of cloud infrastructure, preferably GCP (Cloud Run, App Engine) Willingness to learn quickly More ❯
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Full Stack Engineer

london, south east england, united kingdom
Gravitas Recruitment Group (Global) Ltd
experience with prior startup exposure Proficiency in Python and JavaScript; familiarity with frameworks such as FastAPI, Express.js, and React Strong understanding of REST APIs, WebSockets, and webhook integrations Experience with Git and GitHub for collaborative development Knowledge of cloud infrastructure, preferably GCP (Cloud Run, App Engine) Willingness to learn quickly More ❯
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Lead Java Developer

London Area, United Kingdom
Hybrid / WFH Options
James Adams
SQL-based databases with at least 2-3 years of experience . ✔ Real-time Streaming & Low Latency – Implement real-time communication protocols such as WebSockets to create engaging, live betting and gaming experiences. ✔ Code Quality & CI/CD – Lead the coding standards across the backend team, drive unit testing, automated More ❯
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Lead Java Developer

london, south east england, united kingdom
Hybrid / WFH Options
James Adams
SQL-based databases with at least 2-3 years of experience . ✔ Real-time Streaming & Low Latency – Implement real-time communication protocols such as WebSockets to create engaging, live betting and gaming experiences. ✔ Code Quality & CI/CD – Lead the coding standards across the backend team, drive unit testing, automated More ❯
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Python Developer

London Area, United Kingdom
LevelUP HCS
quickly and excellent problem-solving skills Technical: · Five years Python core development experience working in an enterprise environment. · Experience in creating libraries, restful services, websockets · Libraries: Polars, Pandas, AMPS, Asyncio, Threading, multiprocessing · Two years’ experience SQL Databases (PostGreSQL desirable) – preferred but not essential More ❯
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WebSockets
London
10th Percentile
£51,250
25th Percentile
£85,000
Median
£120,000
75th Percentile
£142,500
90th Percentile
£165,000