26 to 50 of 126 Permanent WebSockets Jobs

Senior Software Engineer - Scientific / HPC

Hiring Organisation
Technical Futures Ltd
Location
Cambridge, Cambridgeshire, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £90,000 per annum
Ansible, OpenTofu). Modern Python tooling and packaging such as uv. Data storage and pipelines, including large simulation results and model serving. API, REST, WebSockets such as FastAPI. Hybrid working available (3 days office/2 WFH), a very generous base salary dependent on your level of skills and experience ...

frontend js/react/typescript in fintech

Location
Greater London, England, United Kingdom
build and bundle work, regulated financial services or KYC/KYB or client onboarding, Storybook or another documented component library, real-time updates over WebSockets or SignalR Must be eligible to work in the UK Условия: 25 Days’ annual leave plus bank holidays An extra day off for your birthday ...

Senior Web Developer - Tools

Hiring Organisation
Rockstar Games
Location
Dundee, Angus, United Kingdom
Salary
£ 70 K
5+ years of experience in professional web development.5+ years of experience using React.5+ years of experience using .NET.Experience with real-time technologies e.g. WebSockets, SignalR.Experience with automated testing, shared code, and source control.Knowledge of Agile, software development, and web-security best practices.Passion for web technologies and a desire to remain ...

Senior Web Developer - Tools

Hiring Organisation
Rockstar Games
Location
Edinburgh, Midlothian, United Kingdom
Salary
£ 70 K
5+ years of experience in professional web development.5+ years of experience using React.5+ years of experience using .NET.Experience with real-time technologies e.g. WebSockets, SignalR.Experience with automated testing, shared code, and source control.Knowledge of Agile, software development, and web-security best practices.Passion for web technologies and a desire to remain ...

Senior Web Developer - Tools

Hiring Organisation
Rockstar Games
Location
Dundee, UK
Employment Type
Full-time
5+ years of experience in professional web development.5+ years of experience using React.5+ years of experience using .NET.Experience with real-time technologies e.g. WebSockets, SignalR.Experience with automated testing, shared code, and source control. Knowledge of Agile, software development, and web-security best practices. Passion for web technologies and a desire ...

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 ...

Senior Frontend Engineer (m/f/d)

Location
City Of London, England, United Kingdom
development tools, concepts, and practices. Basic knowledge of backend systems and API integration. Experience with custom web-based rendering engines Familiarity with RESTful APIs, WebSockets, and data visualization tools. Ability to write clean, efficient, and well-documented code. Excellent problem-solving skills and a passion for building user-friendly applications ...

Senior PHP Developer

Hiring Organisation
Ascent Resourcing Limited
Location
Manchester, Lancashire, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £65,000 per annum
Experience with AI classifiers, large language models or machine-learning pipelines. Working with transcription, telephony or other high-volume communications datasets. Event-driven architectures, WebSockets or real-time application functionality. Integrations involving CRM, telephony or property-technology platforms. AWS technologies including S3, RDS, EC2, Lambda, ECS and CloudWatch. Experience working ...

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 - k6 Core | United Kingdom | Remote

Location
United Kingdom
completion Clear technical communication skills, especially in code reviews and design discussions A good understanding of internet protocols such as HTTP, gRPC, and WebSockets, with some familiarity with lower-level networking concepts Experience with modern development practices, including testing, code review, and iterative development Bonus Points ...

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 ...

Director Data & Analytics API Experience - Data Services

Hiring Organisation
CME- Group
Location
Belfast, Down, United Kingdom
Salary
£ 80 K
Expertise: Highly proficient in Python, with the ability to write clean, idiomatic, and robust code for public consumption.Technical StackEnvironment: Google Cloud Platform (GCP), Apigee.Protocols: WebSockets, REST, GCS.Tooling: Python (Expert), OAuth 2.0, GitHub, Protobuf/Avro, SQL.Company Benefits:Bonus ProgrammeEquity ProgrammeEmployee Stock Purchase Plan (ESPP)Private Medical and Dental coverageMental Health ...

Director Data & Analytics API Experience - Data Services

Location
Belfast, Northern Ireland, United Kingdom
Python, with the ability to write clean, idiomatic, and robust code for public consumption.**Technical Stack*** Environment: Google Cloud Platform (GCP), Apigee.* Protocols: WebSockets, REST, GCS.* Tooling: Python (Expert), OAuth 2.0, GitHub, Protobuf/Avro, SQL.**Company Benefits:*** Bonus Programme* Equity Programme* Employee Stock Purchase Plan (ESPP)* Private Medical ...

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 ...

Software Engineer

Hiring Organisation
Consortia
Location
Bristol, Gloucestershire, United Kingdom
Salary
£ 70 K
experience supporting and mentoring junior or mid-level developersHighly DesirableExperience building real-time systems, ideally using SignalR or similar real-time communication technologies (e.g. WebSockets, pub/sub, event-driven architectures)Experience with cross-platform or hybrid application developmentExposure to AI-assisted development tools such as GitHub Copilot, Claude ...

Software Engineer

Location
West of England, England, United Kingdom
mentoring junior or mid-level developers Highly Desirable Experience building real-time systems, ideally using SignalR or similar real-time communication technologies (e.g. WebSockets, pub/sub, event-driven architectures) Experience with cross-platform or hybrid application development Exposure to AI-assisted development tools such as GitHub Copilot, Claude ...

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 ...