826 to 850 of 1,002 React Jobs in London

Staff+ Software Engineer

Location
Greater London, England, United Kingdom
engineering teams and take ownership of that team's hardest technical problems. Our stack is TypeScript across the board - Node.js on the backend and React + React Native for the frontend You are expected to set technical direction for your team's most critical systems, while partnering with product ...

Junior ASP.NET Developer- Tonbridge

Hiring Organisation
Appcast
Location
London, UK
will work in small teams consisting of a BA, Implementation consultant, web and windows developer and a PM.All current development is built using React JS for the client side backed by WebAPI (C#) REST Endpoints. For managing application state, we use Redux and Immutable JS. Existing features which … active maintenance use the Backbone Marionette framework, but due to the impressive performance and productivity benefits of React, we have chosen to gradually phase out these older frameworks. We use open source JavaScript libraries extensively, most notably Lodash, Plotly Charts and React Virtualized.You will focus on a third-generation .NET ...

Software Engineer (Backend / Full-Stack) - Golang

Hiring Organisation
Adecco
Location
London, United Kingdom
Salary
£ 55 K
BROADBEAN_767011787229627Contract: Full-timeIndustry: ITSalary: 40,000 - 70,000 per yearRecruiter: Mark ChapmanE-Mail: mark.chapman.76701.9115@adeccops.aplitrak.comSoftware Engineer (Backend/Full-Stack) - Go, X.509, React £40,000 - £70,000 DOE + Benefits Fully Remote (UK)About the CompanyJoin an innovative technology organisation operating at the cutting edge of secure communications … APIs* Creating and maintaining PostgreSQL databases and data models* Developing real-time and event-driven platform capabilities* Implementing secure authentication and communication mechanisms* Building React-based interfaces and operational dashboards* Supporting automated testing and CI/CD processes* Contributing to solution design and technical architecture decisions* Developing and extending internal ...

Senior Lead Software Engineer - React Native

Location
Greater London, England, United Kingdom
trends and best practices in mobile development. Drive continuous improvement initiatives to enhance development processes and workflows. Required qualifications, capabilities and skills Proficiency in React framework Building applications usingReact Native/Expo in TypeScript or JavaScript Strong knowledge of React Native architecture Understanding of REST APIsand GraphQL Ability to write ...

Senior Full-Stack Engineer – React/Node.js, Infra Platforms

Location
Greater London, England, United Kingdom
Software Engineer III to join the Infrastructure Platforms, Data Center Services team. You will design, develop, and deliver full-stack solutions across frontend (React) and backend (Node.js/TypeScript, Python) services in a secure, scalable environment. As a seasoned member of an agile team, you will mentor juniors, contribute ...

Senior Creative Software Engineer (ReactJS & WebGL)

Location
Greater London, England, United Kingdom
based applications. Portfolio: A creative portfolio demonstrating your range of experience Technical Stack: In-depth knowledge & commercial experience with the JavaScript environment (Node.js/React) and advanced knowledge and experience of ThreeJS/WebGL Creative Flair: You have a strong eye for design with the talent for translating beautiful static ...

Sr React Developer - Equities - Vice President

Hiring Organisation
JP Morgan Chase
Location
London, United Kingdom
Salary
£ 100 K
with little to no oversightPractical cloud native experienceExperience in Computer Science, Computer Engineering, Mathematics, or a related technical fieldPreferred qualifications, capabilities, and skillsExpertise in React 17+ and modern front-end development practicesExperience with AG Grid or similar advanced data grid librariesProven ability to optimize web applications for performance and responsivenessFamiliarity ...

Lead Software Engineer - Frontend Engineering - React Native

Location
Greater London, England, United Kingdom
team Ability to focus on promptly addressing customer needs Excellent written and verbal communication skills in English Preferred qualifications, capabilities and skills Proficiency in React framework & Building applications usingReact Nativein TypeScript or JavaScript Native application development across Android/iOS inKotlin/Swift Understanding of REST APIsand GraphQL Comfortable working ...

React Native Engineer

Hiring Organisation
Manual
Location
London, United Kingdom
Salary
£ 60 K
building an all-in-one healthcare platform which brings together world-leading medical expertise and technical excellence.The OpportunityWe’re looking for a React Native Engineer to help build and scale VOY’s mobile experience — a core part of how users engage with their health, access care, and build long-term … with high visibility and a meaningful impact on our mission to become the healthcare partner people trust for life.Our mobile stack is built on React Native, but we’re also keen to hear from strong React engineers who are excited to move into mobile development. React Native experience ...

Principal Product Engineer

Hiring Organisation
Zapp
Location
London, UK
Employment Type
Full-time
much as CV.Even better if you knowNestJS. Our backend is a NestJS service, and you'd feel at home when features need backend work. React Native. Our apps run on React Native and Expo. You'll touch them when features cross stack boundaries. GraphQL Federation. We run a federated gateway ...

Frontend Software Engineer

Location
Greater London, England, United Kingdom
design, implement, deliver, and maintain an international top-class product, ensuring quality, maintainability, and sustainability. The Tech Stack We have created a single-page React application localized into multiple languages with TypeScript, RTK Query, MUI, and react-router. Developers typically run the SPA locally with Vite or Webpack DevServer (including … Candidate Strong experience in modern frontend web development. Proven production experience with JavaScript, TypeScript, DOM manipulation, HTML, and CSS/MUI. Deep understanding of React.js, its core principles (state, props, context, hooks), and modern architectural patterns. Experience with state management solutions (e.g., Redux/RTK Query, React Context ...

Javascript .net Fullstack Web Application Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
£ 70 K
PM.You will focus on a third-generation .NET web application suite, although legacy solutions also comprise of ASP.NET WebForms.All new development is built using React JS for the client side backed by WebAPI (C#) REST Endpoints. For managing application state, they use Redux and Immutable JS. Existing features which … active maintenance use the Backbone Marionette framework, but due to the impressive performance and productivity benefits of React, we have chosen to gradually phase out these older frameworks. We use open source JavaScript libraries extensively, most notably Lodash, Plotly Charts and React Virtualized.Postman covers API level testing. Full stack integration ...

Senior Software Engineer

Hiring Organisation
Consortia
Location
London, United Kingdom
Salary
£ 80 K
overall tech strategy.What You’ll Need:A track record of taking products to production as a Senior Software EngineerFull-stack development skills with React, TypeScript, Node.js, React Native, and AWSStrong knowledge of domain-driven design, architecture, security, and data management best practicesExperience with AWS Lambda and serverless architectureExperience in FinTech ...

Python Developer

Hiring Organisation
NEEV LIMITED
Location
London, United Kingdom
Employment Type
Contract
PROVIDED Role : Python Developer Location: London, UK (5 Days/Week Onsite) Type: Contract Inside IR35 Exp: 5 to 10 Years A Python + React + SQL + Databricks developer role blends backend data engineering with frontend application development, requiring strong coding skills in Python, React.js, SQL, and Databricks … Management Write and optimize complex SQL queries. Manage relational databases and integrate with Databricks. Perform data cleansing, transformation, and aggregation for analytics. Frontend Development (React) Design and build responsive, interactive UIs using React.js. Integrate frontend components with backend APIs and Databricks datasets. Use visualization libraries (D3.js, Plotly, Recharts) for dashboards. ...

Full Stack Software Developer - AI Agent Application

Location
City Of London, England, United Kingdom
Agent. We are nimble, innovative and move quickly, using the latest technologies available to us within the group. Our tech stack includes Python and React/Next.js, makes extensive use of LLMs via API, and is deployed on OSS2 Kubernetes within Marsh Tech. Being forward-deployed means we build … role. Your role is to lead on the engineering development and maintenance of the AI technology we build, spanning the backend (Python), front-end (React and Next.js) and deployment (OSS2/Kubernetes). You will also get into the AI Agent plumbing and agent resilience. AI Agent quality and trust ...

Junior CTO / Full Stack JavaScript Developer

Hiring Organisation
Quant Capital
Location
London, United Kingdom
Salary
> £ 150 K
Junior CTO/Full Stack JavaScript DeveloperHome based working70,000Stack: Node.js, React, MongoDB, TypeScript, MeteorITAP Group is a successful online media and social platform business at an exciting growth phase.We are looking for a very keen full stack developer who is willing to learn in a fast-paced environment … forecasts behind the platform over the coming year mean there will be plenty of greenfield and growth work. The stack is comprised of:Node.js, React, MongoDB, TypeScript, MeteorThe firm has an established reputation in the market and a unique product. The internet is our business so we like to keep ...

Senior Engineer, Finance Engineering

Location
Greater London, England, United Kingdom
will also have a lot of impact on our team culture, processes and norms. Taptap Send is a cross‐platform mobile app developed with React Native and TypeScript, which talks to a backend service written in Kotlin and backed by a PostgreSQL database, all of which runs … managed via Terraform. Our internal tools leverage these technologies in addition to Web React and Python. We’re an encouraging environment that values both teamwork and autonomy, and have many exciting upcoming challenges, including scaling up to handle increased volume and complexity, improving UI and UX to drive growth ...

Senior Developer

Hiring Organisation
SR2
Location
London, South East England, United Kingdom
Employment Type
Full-Time
Salary
£625.00 - £750.00 per day
work in a mixed team of engineers from several suppliers, alongside a dedicated AI engineering capability. The platform combines Python/FastAPI services, React and TypeScript interfaces, Camunda workflow orchestration, modular services, data persistence, and integration with existing Defence tasking processes. Despite the AI-enabled focus of the platform, this … Defence Intelligence, National Security or comparable secure environments Proven experience leading agile development teams Strong engineering background across Python, FastAPI, REST APIs, React and TypeScript Experience designing and delivering microservice architectures ...

Senior Frontend Engineer

Hiring Organisation
AECOM
Location
London, United Kingdom
Salary
£ 80 K
closely with AI/ML engineers to bring advanced capabilities to life through polished, high-performance interfaces. You will work primarily with Svelte and React (TypeScript) to build the tools that thousands of engineers use daily, turning complex AI and engineering outputs into intuitive, delightful user experiences. This … core of your work will be crafting exceptional user interfaces and frontend architecture. Design, build, and maintain rich, interactive user interfaces using Svelte and React (TypeScript), delivering production-grade frontend experiences that surface complex AI and engineering data Collaborate closely with product managers, ML engineers, and backend engineers to define ...

Founding Product Engineer (AI-First)

Location
Greater London, England, United Kingdom
Build and launch product features end-to-end, from idea to production. Design scalable APIs and backend systems. Develop modern frontend experiences using React and TypeScript. Integrate LLMs and AI agents into production workflows. Collaborate directly with founders and early customers to shape product direction. Make key architectural and product … Required Experience: 6+ years of full-stack software engineering experience (exceptional candidates with fewer years will also be considered). Strong expertise in: TypeScript React Node.js Experience building products from 0 to 1 in startup environments. Hands‐on experience integrating LLM APIs (OpenAI, Anthropic, or similar) into production applications. Strong ...

Senior SharePoint Developer

Hiring Organisation
Larbey Evans Ltd
Location
London, UK
Employment Type
Full-time
SharePoint Online Lead migration of SharePoint 2016 on-premise solutions to SE and Online Build SPFx web parts, extensions, and integrations using TypeScript, JavaScript, React, and REST APIs Manage updates, patches, and service packs to ensure stability, security, and compliance Administer service and web applications, site collections, permissions, authentication … Edition (SE) and SharePoint Online, including migration from SharePoint 2016 on-premise Strong expertise in SPFx development and modern front-end technologies (TypeScript, JavaScript, React, HTML5, CSS3) Experience integrating SharePoint solutions using REST APIs, Microsoft Graph, C#, and .NET Hands-on management of on-prem SharePoint environments, including patching, upgrades ...

Senior Full Stack Engineer (Realtime & Voice) Customer Experience Platform

Location
Greater London, England, United Kingdom
looking for a senior full stack engineer to anchor this product, owning the realtime and voice layer end to end while building across React/TypeScript front ends, Scala and Python services, and cloud infrastructure. The team is lean and senior, ownership is broad, and the path from your code … text-to-speech pipelines, realtime model orchestration, and latency and quality budgets Build product features across the stack, including web chat front ends in React/TypeScript, backend services in Scala and Python, and infrastructure on GCP Design for multi-tenant scale, with one codebase serving many partners through configuration ...

Senior Solution Architect

Location
London, United Kingdom
govern design approvals via ARBs and CABs. Modernisation Roadmap: Define migration paths to retire legacy tech (.NET WPF, Terraform tech debt, dual Vue.js/React footprint). Cloud and Security: Design scalable patterns using AWS Well-Architected principles, Docker containerisation, and identity tools Data Architecture: Oversee logical/physical data … Clearance Proven experience in technology modernisation and legacy-to-cloud migration paths. Core tech stack: .NET/.NET Core , Python , JavaScript/TypeScript (Vue.js, React) . AWS Managed Services (RDS, SQS, DynamoDB, OpenSearch, ECR) and AWS Well-Architected Framework. Terraform (IaC) and Docker at scale. Identity, authentication, and API Gateway ...

Back End Engineer - Repeats

Hiring Organisation
iwoca
Location
London, United Kingdom
Salary
£ 80 K
clean, well-tested Python, and take part in code reviews to learn from teammates and keep quality high.Pick up front-end work in Pandora (React, TypeScript) so you can own features end-to-end over time.The requirementsEssentialComfortable writing clear, testable Python. You do not need to be an expert.1+ years … commercial engineering experience.Working knowledge of relational databases. We use PostgreSQL.Curious about the full stack and up for picking up front end (React, TypeScript) over time.Clear written and spoken communication. You can explain technical work in a way non-engineers can act on.You care how your work affects customers ...

Software Engineer, Front-End Leaning

Location
Greater London, England, United Kingdom
level up those around you Experience requirements Strong frontend engineering experience, with production-grade work on complex, high-performance UIs Proficiency in TypeScript and React Experience with 3D rendering, WebGL, Canvas, or similar browser-based visualisation technologies is a strong plus Familiarity with Python and backend development Experience with Kubernetes … looking for experience across all of these — as long as you're open to learning, please apply. Backend: Python and Rust Frontend: TypeScript and React Deployment: Kubernetes Infrastructure: GCP Why Encord Competitive salary, commission, and meaningful equity in a high-growth startup Strong in‐person culture — most of the team ...