26 to 50 of 93 WebSockets Jobs in London

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

Hiring Organisation
DeepL
Location
London, United Kingdom
Salary
£ 80 K
frontend, and shipping backend services in Node.js/TypeScript (or a strongly transferable language, with willingness to ramp) on the backend.Real-time: WebRTC, WebSockets, streaming architectures, latency-sensitive systems.High Agency: You don't wait for permission. If the billing reconciliation process is slow, you automate it. If the documentation ...

Real-Time Backend Engineer | Crypto Trading Platform (London)

Location
Greater London, England, United Kingdom
time client APIs, collaborating closely with product, frontend, and trading teams. Applicants should have Kotlin or Python backend experience, proficiency with REST APIs and WebSockets, and knowledge of SQL, Docker/Kubernetes, and AWS. #J-18808-Ljbffr ...

UI Developer

Hiring Organisation
McGregor Boyall
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£700.00 - £800.00 per day
streams. Drive performance, scalability and modernisation of the UI platform. Key Skills Strong React, TypeScript and RxJS experience. Experience with Redux/Context API, WebSockets and Vite. Knowledge of micro-frontends and modular architecture. Experience with Vitest, Playwright, Storybook or similar. OpenFin experience is advantageous. Financial markets experience, particularly ...

Senior Software Engineer (C# / .Net) · London ·

Location
Greater London, England, United Kingdom
Storage , and data-modelling trade-offs API design : RESTful contracts, versioning, webhooks, long-running operations (202 Accepted patterns) Real-time & frontend integration : SignalR/WebSockets, SPA frameworks (Vue/Nuxt or similar), TypeScript What good looks like You leave systems clearer, more correct, and easier to evolve Problems are solved ...

Senior Backend Engineer

Location
Greater London, England, United Kingdom
need to have Proven ownership of backend services built and operated within a microservices architecture. A strong grasp of communication protocols such as HTTP, WebSockets and AMQP, including when to apply each. Production fluency in at least one modern backend framework. Deep knowledge of relational databases, including indexing, transactions, isolation ...

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 Engineer London

Location
Greater London, England, United Kingdom
visualising data in 3D (e.g. Three.js, React Three Fiber, WebGL, Deck.gl ) Real-time data flows: Comfortable working with real-time data and async patterns (Websockets, workers) Writing testable, reusable code: Vitest/Jest/Playwright, Storybook, design systems Data visualisation: Presenting complex data intuitively; geospatial experience is a plus. ...

Senior Software Developer

Hiring Organisation
Addition
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
Senior Software Developer Permanent | Competitive Salary + Annual Performance Bonus Location: London | Hybrid – 1 Day per Week in the Office We’re partnering with a forward-thinking technology business to appoint an experienced Senior Full ...

C# Backend Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 100 K
Tech: C#, concurrent .NET code,TCP/IP and websockets, SQLChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Commodity Trading Software Firm, City of London, 40 man flat Dev TeamPay: 85k, 20% Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Backend Developer FintechQuant ...

Junior C# Developer – Fintech

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 70 K
from day 1.My client is based in Central London flex working is a given from now on.Tech: Junior C#, .Net, F#, WPF, SignalR/websockets, Protocol Buffers, Octopus, Autofac, SQL ServerChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Prop Trading Firm , City of London, 40 man flat ...

Senior Software Engineer

Location
Greater London, England, United Kingdom
We are seeking a Senior Full Stack & Systems Engineer to join our Defence delivery team. This is a versatile, high-impact role designed for funded client delivery: you will build mission-critical web applications and ...

C# Desktop Developer Fintech

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 100 K
Tech: C#, .Net, F#, WPF, SignalR/websockets, Protocol Buffers, Octopus, Autofac, SQL ServerChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Commodity Trading Software Firm, City of London, 40 man flat Dev TeamPay: 75k, 20% Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Desktop ...

Product Manager - EV

Hiring Organisation
Digital Gurus
Location
London Area, United Kingdom
product analytics, user research, and A/B testing to drive decisions Familiarity with cloud platforms (e.g., AWS, Azure) and integration technologies (e.g., APIs, websockets) (desirable) EV, energy, renewables, automotive or infrastructure sector experience (desirable) Interviewing ASAP - get in touch with Kaiya for more information on emmaj@digitalgurus.co.uk ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 per annum
We're looking for a Senior Software Engineer to join a growing AI team and take ownership of the application and integration layer behind a new generation of AI-powered products. This is a genuinely ...

Senior Software Engineer

Hiring Organisation
The Portfolio Group
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£90000/annum
We're looking for a Senior Software Engineer to join a growing AI team and take ownership of the application and integration layer behind a new generation of AI-powered products. This is a genuinely ...

C# Backend Developer Fintech

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 100 K
Tech: C#, concurrent .NET code,TCP/IP and websockets, SQLChallenge: Greenfield Trading platform, API development, industry specific challengesFirm: Well-known Commodity Trading Software Firm, City of London, 40 man flat Dev TeamPay: 80k, 20% Bonus- 750 training budget, Pension, Life/Health, Some Flex WorkingC# Backend Developer FintechQuant ...

Tech Lead Manager - Lakebase

Hiring Organisation
DataBricks
Location
London, United Kingdom
Salary
£ 80 K
edge that every customer touches. The proxy handles all client connections and transfers every byte of query traffic, serving every data protocol: Postgres, HTTP, WebSockets, and the Data API. We route and manage large volumes of concurrent connections, solving load balancing, authentication, and data access at high throughput, with ...

Tech Lead Manager - Lakebase

Hiring Organisation
DataBricks
Location
London, UK
Employment Type
Full-time
network edge that every customer touches. The proxy handles all client connections and transfers every byte of query traffic, serving every data protocol: Postgres, WebSockets, and the Data API. We route and manage large volumes of concurrent connections, solving load balancing, authentication, and data access at high throughput, with ...

Software Engineer (Backend / Full-Stack) - Golang

Hiring Organisation
Adecco
Location
London, United Kingdom
Salary
£ 55 K
modern CSS frameworks, ideally Tailwind CSS________________________________________Desirable Experience* mTLS and X.509 certificate management* HashiCorp Vault, Consul or Terraform* InfluxDB* Server-Sent Events (SSE) and WebSockets* Networking or embedded systems exposure* Data visualisation tools such as Recharts or D3* Distributed systems and scalable architectures________________________________________Additional Requirements* Must be eligible and willing … this role.________________________________________Keywords: Go, Golang, Gin, REST API, PostgreSQL, GORM, Docker, React, JavaScript, ES6, Axios, Tailwind CSS, JWT, mTLS, X.509, Terraform, Vault, Consul, InfluxDB, WebSockets, SSE, CI/CD, Microservices, Cloud Native, Distributed Systems, Secure Communications, Full Stack Developer, Backend Engineer, Remote Software Engineer, Platform Engineering. ...

Engineer C# (Full Stack)

Location
Greater London, England, United Kingdom
## Engineer C# (Full Stack)Applylocations: Londontime type: Full timeposted on: Posted Todayjob requisition id: R5595**Group Overview**The TP ICAP Group is a world leading provider of market infrastructure.Our purpose is to provide clients ...

Forward Deployed ML Engineer, Agents

Location
Greater London, England, United Kingdom
About aion Aion is the enterprise AI platform, a full-stack solution for building, fine-tuning, and deploying AI at scale. Whether an organization is modernizing internal operations, launching AI-powered products, or transforming customer ...

Engineer C# (Full Stack)

Hiring Organisation
Liquidnet
Location
London, United Kingdom
Salary
£ 80 K
Group OverviewThe TP ICAP Group is a world leading provider of market infrastructure.Our purpose is to provide clients with access to global financial and commodities markets, improving price discovery, liquidity, and distribution of data, through ...

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 ...