601 to 625 of 759 React Jobs in London

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they’re looking … day — thanks to a rock-solid CI/CD setup Collaborate closely with product, design, and leadership to shape the roadmap Tech stack you’ll be working with : TypeScript, React, Node.js, AWS Serverless (Lambda, DynamoDB, EventBridge) What you’ll be doing: This isn’t just about writing code, it’s about owning problems end-to-end and influencing every part … observable as we scale to hundreds of enterprise customers. Collaborate closely with product, design, and leadership to set roadmap priorities and define technical strategy. Work across the stack — from React frontends to AWS serverless backends — and own your projects from infrastructure to styling. Deploy continuously (multiple times per day) using their robust CI/CD pipelines. Mentor other engineers and More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they’re looking … day — thanks to a rock-solid CI/CD setup Collaborate closely with product, design, and leadership to shape the roadmap Tech stack you’ll be working with : TypeScript, React, Node.js, AWS Serverless (Lambda, DynamoDB, EventBridge) What you’ll be doing: This isn’t just about writing code, it’s about owning problems end-to-end and influencing every part … observable as we scale to hundreds of enterprise customers. Collaborate closely with product, design, and leadership to set roadmap priorities and define technical strategy. Work across the stack — from React frontends to AWS serverless backends — and own your projects from infrastructure to styling. Deploy continuously (multiple times per day) using their robust CI/CD pipelines. Mentor other engineers and More ❯

Principal JavaScript Engineer (TypeScript/React/Node.js) £150,000–£170,000 + Equity | Hybrid – 3 days in London We’re helping a VC-backed SaaS scaleup reinvent how organisations manage and approve spend, from software requests to supplier onboarding, and they’re gearing up for serious growth. With enterprise clients already on board and revenue climbing, they’re looking … day — thanks to a rock-solid CI/CD setup Collaborate closely with product, design, and leadership to shape the roadmap Tech stack you’ll be working with : TypeScript, React, Node.js, AWS Serverless (Lambda, DynamoDB, EventBridge) What you’ll be doing: This isn’t just about writing code, it’s about owning problems end-to-end and influencing every part … observable as we scale to hundreds of enterprise customers. Collaborate closely with product, design, and leadership to set roadmap priorities and define technical strategy. Work across the stack — from React frontends to AWS serverless backends — and own your projects from infrastructure to styling. Deploy continuously (multiple times per day) using their robust CI/CD pipelines. Mentor other engineers and More ❯

Founding Product Engineer Software Engineer | C# | .NET | React | TypeScript | FinTech | Start-Up | London We are seeking a talented Software Engineer to join as a Founding Product Engineer at an early-stage fintech. You will work on building an instant, transparent, and affordable payments network. This role is perfect for a Software Engineer who thrives in a start-up environment, loves … and React. Write high-quality, maintainable code daily as a hands-on Software Engineer. Build backend APIs, front-end web apps, and systems integrations using C# and .NET, with React and TypeScript on the front end. Leverage AI tools to design, debug, and ship features faster, boosting productivity. Influence architectural decisions, including enterprise patterns such as microservices, DDD, and CQRS. … with 3+ years experience as a Software Engineer. Comfortable working across the full stack and adapting to new technologies quickly. Its preferred that candidates have worked with TypeScript/React however this role is Backend leaning. .NET Software Engineers with limited Frontend exposure or different frameworks are encouraged to apply. Ambitious and highly driven, with an interest in start-up More ❯

company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases and AWS hosting. So this is a great opportunity to learn and expand all those skills. What we’re looking for from a Back … the company’s platform features and technologies from the ground up. Experience needed as a Back End Developer: 3+ years of Node.js development Type Script/Strong JavaScript skills React REST API development SQL Git More ❯

company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases and AWS hosting. So this is a great opportunity to learn and expand all those skills. What we’re looking for from a Back … the company’s platform features and technologies from the ground up. Experience needed as a Back End Developer: 3+ years of Node.js development Type Script/Strong JavaScript skills React REST API development SQL Git More ❯

company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases and AWS hosting. So this is a great opportunity to learn and expand all those skills. What we’re looking for from a Back … the company’s platform features and technologies from the ground up. Experience needed as a Back End Developer: 3+ years of Node.js development Type Script/Strong JavaScript skills React REST API development SQL Git More ❯

company’s clients and customer success team to identify the source of a technical problem and then fixing those problems. This role covers a lot of technologies, from UI, React, system configuration, Node.js backend code, databases and AWS hosting. So this is a great opportunity to learn and expand all those skills. What we’re looking for from a Back … the company’s platform features and technologies from the ground up. Experience needed as a Back End Developer: 3+ years of Node.js development Type Script/Strong JavaScript skills React REST API development SQL Git More ❯

of applied AI. The role This isnt your standard engineering role youll be working end-to-end across frontend, backend, and cloud infrastructure. Youll build sleek, scalable applications with React and Next.js, design and maintain robust APIs with Node.js and Python, and architect solutions deployed on AWS or GCP. Youll also set up and maintain CI/CD pipelines, manage … big plus. The role is full-time, 3/4 days a week in their London office. What theyre looking for Strong experience as a Full-Stack Engineer across React, Next.js, Node.js, and Python. Solid knowledge of SQL databases and data modelling. Hands-on experience with cloud platforms (AWS or GCP). Proven track record building and maintaining CI/ More ❯

to financial modelling, private equity, consultancies and asset managers, with live production deployments at leading institutions. What you’ll be doing Designing and maintaining modern frontend web apps using React/Next.js Developing robust backend services and APIs, preferably in Python (Django, FastAPI, etc.) Owning large parts of the AI agent infrastructure: building and deploying multi-agent systems, Retrieval-Augmented … critical, high-impact features Mentoring junior engineers and promoting engineering best practices What they’re looking for 5+ years of professional software engineering experience Solid, hands-on experience with React/Next.js in production environments Strong backend development skills (Python preferred) and familiarity with databases (relational or NoSQL) Experience with Git, DevOps tooling, containerisation, CI/CD, caching or messaging More ❯

to financial modelling, private equity, consultancies and asset managers, with live production deployments at leading institutions. What you’ll be doing Designing and maintaining modern frontend web apps using React/Next.js Developing robust backend services and APIs, preferably in Python (Django, FastAPI, etc.) Owning large parts of the AI agent infrastructure: building and deploying multi-agent systems, Retrieval-Augmented … critical, high-impact features Mentoring junior engineers and promoting engineering best practices What they’re looking for 5+ years of professional software engineering experience Solid, hands-on experience with React/Next.js in production environments Strong backend development skills (Python preferred) and familiarity with databases (relational or NoSQL) Experience with Git, DevOps tooling, containerisation, CI/CD, caching or messaging More ❯

to financial modelling, private equity, consultancies and asset managers, with live production deployments at leading institutions. What you’ll be doing Designing and maintaining modern frontend web apps using React/Next.js Developing robust backend services and APIs, preferably in Python (Django, FastAPI, etc.) Owning large parts of the AI agent infrastructure: building and deploying multi-agent systems, Retrieval-Augmented … critical, high-impact features Mentoring junior engineers and promoting engineering best practices What they’re looking for 5+ years of professional software engineering experience Solid, hands-on experience with React/Next.js in production environments Strong backend development skills (Python preferred) and familiarity with databases (relational or NoSQL) Experience with Git, DevOps tooling, containerisation, CI/CD, caching or messaging More ❯

to financial modelling, private equity, consultancies and asset managers, with live production deployments at leading institutions. What you’ll be doing Designing and maintaining modern frontend web apps using React/Next.js Developing robust backend services and APIs, preferably in Python (Django, FastAPI, etc.) Owning large parts of the AI agent infrastructure: building and deploying multi-agent systems, Retrieval-Augmented … critical, high-impact features Mentoring junior engineers and promoting engineering best practices What they’re looking for 5+ years of professional software engineering experience Solid, hands-on experience with React/Next.js in production environments Strong backend development skills (Python preferred) and familiarity with databases (relational or NoSQL) Experience with Git, DevOps tooling, containerisation, CI/CD, caching or messaging More ❯

your growth is supported, and your work helps shape a platform used every day by modern companies. What you will do: Implement and maintain features across the stack using React, TypeScript, Node.js, NestJS, PostgreSQL and AWS Collaborate closely with senior engineers, product and design to deliver well-scoped features from start to finish Participate in code reviews, share knowledge and … ECS, RDS, S3, SES, CloudFront, CDK) with support from senior teammates. What we are looking for: Proven experience shipping fullstack features in a product-driven team String skills with React, TypeScript, Node.js, and PostgreSQL Working knowledge of AWS services (ECS, RDS, S3, CloudFront, etc. Hands on with modern workflows and tooling, for example GitHub, GitHub Actions, Linear, Sentry Ability to More ❯

your growth is supported, and your work helps shape a platform used every day by modern companies. What you will do: Implement and maintain features across the stack using React, TypeScript, Node.js, NestJS, PostgreSQL and AWS Collaborate closely with senior engineers, product and design to deliver well-scoped features from start to finish Participate in code reviews, share knowledge and … ECS, RDS, S3, SES, CloudFront, CDK) with support from senior teammates. What we are looking for: Proven experience shipping fullstack features in a product-driven team String skills with React, TypeScript, Node.js, and PostgreSQL Working knowledge of AWS services (ECS, RDS, S3, CloudFront, etc. Hands on with modern workflows and tooling, for example GitHub, GitHub Actions, Linear, Sentry Ability to More ❯

Senior Front End Developer/Engineer (React TypeScript Data Visualisation) London to £80k Are you a skilled Software Developer with strong React and Data Visualisation skills combined with a good appreciation of financial markets and technology? You could be joining a growing, global, Fintech services company that has seen 30-40% year on year growth for the past 10 years … ll design and develop new features and enhancements to the front end of the platform with a focus on real-time data visualisation on client dashboards and portals using React, there's approximately 70-80% Greenfield development. You'll collaborate with backend engineers to build complex financial products in a technology driven environment with lots of learning and self development … two days. About you: You have a strong knowledge of software engineering best practices and Computer Science fundamentals such as OOP, Data Structures, Design Patterns You have expertise with React and strong TypeScript skills You have experience with data visualisation and have worked on complex systems You have a good understanding of financial markets, ideally with experience in a similar More ❯

that has already achieved impressive traction without paid acquisition. Skills/Experience Experience as a founding Engineer Write production-quality code across the stack, including Node.js, Express, GraphQL, TypeScript, React, and React Native. Deliver high-quality, responsive web and mobile apps, leveraging modern frameworks such as Vite, React Query, Context API, and CSS libraries. Integrate AI/ML APIs, LLM More ❯

securing CI/CD pipelines and using security tools. Expertise in key technologies such as .NET/C#, Azure PaaS, Javascript, and Salesforce APEX, and in frameworks such as React, Node, React-Native, Playwright, etc Experience with Salesforce automation is mandatory Holds the right to work in the UK Robert Walters Operations Limited is an employment business and employment agency More ❯

impact in both product and technical decision Location: Remote (UK) Contract: 6 Months (likely extension) Rate: £350-450 p/day Start: ASAP Key Skills: Strong commercial experience with React and TypeScript . Experience deploying and managing applications in AWS . Strong understanding of API integration and data flow between backend and frontend. Solid grasp of SQL and data handling … within the UI. Experience with testing frameworks (Jest, Cypress, React Testing Library). (Bonus) Familiarity with data visualisation libraries. (Bonus) Previous experience in data-heavy systems or B2B SaaS Key Responsibilities: Develop and maintain responsive frontend applications using React and TypeScript . Collaborate with backend engineers to integrate APIs (FastAPI, SQLModel, PostgreSQL). Optimise performance and scalability of frontend components More ❯

both frontend and backend systems, connecting AI models to real-world user interfaces and data pipelines. What you'll be doing: Develop and deploy full stack features (Python backend, React frontend) Integrate LLM and GenAI components into the product ecosystem Conduct user research to understand risk and usability in AI systems Contribute to agile development cycles and code reviews Key … Skills: Python, React, TypeScript, Git/GitHub, cloud infrastructure (GCP), agile development, automated testing Nice to Have: Experience with AI safety evaluations, LangGraph, PydanticAI, or AutoGen frameworks Ideal for: Full stack engineers interested in building user-facing AI tools and safety-focused GenAI systems. Desired Skills and Experience Python, React, TypeScript, Git/GitHub, cloud infrastructure (GCP), agile development, automated More ❯

is a chance to join an organisation that blends modern FinTech innovation with enterprise-grade engineering, backed by a strong reputation and long-term investment in technology. Tech Stack React, TypeScript, (core technologies) Integration with Headless CMS (e.g. Contentful) CI/CD pipelines, infrastructure-as-code, automated testing (Node, Jest, React Testing Library, SonarCloud, NPM) Exposure to Cloud environments and … Promote knowledge sharing and high coding standards Partner with stakeholders across design, product, and engineering What we're looking for 8+ years' experience in Frontend development Strong background in React, TypeScript, and Deep experience working with component libraries/design systems Solid understanding of CI/CD automation, testing, and DevOps principles Experience integrating with APIs and Headless CMS platforms More ❯

developing enterprise-grade SaaS features across backend and frontend systems Building secure, scalable, and high-performing APIs and services (NestJS, GraphQL, REST) Creating data-driven dashboards and UIs with React, Next.js, and Chakra UI Translating product and design requirements into elegant, maintainable solutions Troubleshooting and optimising performance across the full stack Collaborating with product managers, designers, and engineers to deliver … for: 5+ years experience building enterprise SaaS products (ideally in cybersecurity or data-heavy environments) Strong backend development with TypeScript, NestJS, Sequelize ORM, GraphQL, REST APIs Frontend expertise with ReactJS, NextJS, Typescript, Chakra UI Experience with MySQL and NoSQL databases Familiarity with messaging/event-driven systems (Kafka) Ability to work closely with designers (Figma) and translate complex business logic More ❯

both frontend and backend systems, connecting AI models to real-world user interfaces and data pipelines. What you'll be doing: Develop and deploy full stack features (Python backend, React frontend) Integrate LLM and GenAI components into the product ecosystem Conduct user research to understand risk and usability in AI systems Contribute to agile development cycles and code reviews Key … Skills: Python, React, TypeScript, Git/GitHub, cloud infrastructure (GCP), agile development, automated testing Nice to Have: Experience with AI safety evaluations, LangGraph, PydanticAI, or AutoGen frameworks Ideal for: Full stack engineers interested in building user-facing AI tools and safety-focused GenAI systems. More ❯

Full Stack PHP Developer (React & Typescript) – £80,000 – Hybrid Overview A global digital marketing and technology agency specialising in online gaming is seeking a Software Developer to join its high-performing development team. This role offers the opportunity to work on scalable, high-throughput systems that power real-time user experiences in the iGaming sector. You'll play a key … Role and Responsibilities Work across the full stack, with an even split between frontend and backend development. Contribute to the transition from a PHP-heavy stack towards TypeScript/React-based frontend applications. Deliver scalable, performant, and reliable solutions for high-traffic platforms. Collaborate with designers, product teams, and fellow engineers to raise the standard of customer-facing experiences. Write … best practices. Contribute ideas for technical improvements and new greenfield builds. Essential Skills and Experience Strong commercial experience with PHP (backend). Solid hands-on skills with TypeScript and React (frontend). Exposure to or NestJS desirable (but not essential if TypeScript is strong). Background in greenfield development projects Comfortable working in collaborative, agile teams. DevOps/cloud experience More ❯

with ongoing quality training and career development opportunitiesThis is the ideal role for a Software Engineer with front-end experience gained with web applications, JavaScript or TypeScript and modern React to advance their career in a meaningful way with our leading, vital charity.As a critical member of our team, you’ll have the chance to innovate, drive your skills forward … that support hundreds of thousands of people across the UK.Specifically, you will create applications that are feature-rich and easy to use and understand, incorporating responsive user interfaces using React/Next.js. You’ll use TypeScript and Tailwind CSS coupled with organisational branding for style, and insights from user analytics and behaviour tracking tools to ensure we are meeting expectations.Additionally … need:- Significant experience developing web applications for internal teams and external customers- Proven experience building complex web applications with Next.js- Expertise in JavaScript and/or TypeScript and modern React, including Hooks, Context API, Server and Client Components- The ability to implement best practices in usability, accessibility and inclusive designOther organisations may call this role Web Developer, JavaScript Developer, Front More ❯