226 to 250 of 1,205 React Jobs in London

sort of developer we hope is reading this: Full stack: You can build complex mobile and web applications, with solid experience in iOS/Android, Angular, HTML5, CSS, Node.js, React, Python, JavaScript, and databases like MySQL. Adaptable: You love to learn and develop with unfamiliar technologies, swiftly picking up new languages and frameworks, be it C++, C#, or new languages More ❯

Code (IaC) approach (Terraform is a plus) A solid understanding of development methodologies and design patterns Golang/Python are also a plus Experience with the following: Cloudflare, Fastly React, Typescript, Astro, NodeJS are a nice to have Location & Hybrid working: This role will sit in our London Bridge office 2 days per week (or more if you prefer). More ❯

Work with Enterprise systems and ensure they’re integrated effectively into our custom-built systems Hot Skills... Experience building applications using modern frameworks, libraries, languages, and tools such as React, Next.js, JavaScript, TypeScript, Golang, Rust Experience in setting up, maintaining, and querying different types of databases using SQL/NoSQL (we use PostgreSQL database along with GCP FireStore document databases More ❯

Work with Enterprise systems and ensure they’re integrated effectively into our custom-built systems Hot Skills... Experience building applications using modern frameworks, libraries, languages, and tools such as React, Next.js, JavaScript, TypeScript, Golang, Rust Experience in setting up, maintaining, and querying different types of databases using SQL/NoSQL (we use PostgreSQL database along with GCP FireStore document databases More ❯

Assume responsibility for crucial frontend/backend metrics, including load times, performance, and security. What We're Looking For: Experience in a mainstream programming languages. Our current tech is - React, Node.JS, Typescript and Python. Proven experience working with a range of data sources, from noSQL to SQL database engines. Strong knowledge and proven application of Agile approaches to drive product More ❯

for people who expect personal performance and team performance to be nothing short of the best. Preferred qualifications, capabilities and skills Fluency across the full engineering stack, covering TypeScript, React (including common patterns in AG-Grid and Charting libraries), Java and Spring Boot. Experience designing and building solutions on at least one Cloud platform (AWS, GCP). Experience building and More ❯

shipping industry. Experience in delivering technology projects in the shipping industry, including data analytics platforms. Hands-on experience with a variety of technologies such as Microservices, .NET Core, Angular, React, Node, Java, Azure/AWS/Docker, ML/AI frameworks, NoSQL, blockchain, and semantic technologies. Preferred qualifications, capabilities and skills: Strong problem-solving skills and the ability to resolve More ❯

to learn new technologies quickly. Desirable Skills: • Experience of systems engineering and systems integration. • Experience of contributing to bids/proposals. • Front-end development expertise with JavaScript and the REACT/MaterialUI framework. #LI-JS2 Together, as owners, let's turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you'll reach More ❯

aspects of client implementations Provide technical expertise for complex customer requirements Contribute to technical documentation and knowledge base Technical Requirements Essential Technical Skills Expert-level Node.js and Vue.js/React development with proven track record Strong PostgreSQL and database design/optimisation skills Extensive hands-on AWS experience (Fargate, Aurora, Lambda, S3, etc.) Docker and containerisation expertise Modern web technologies More ❯

s built using modern technologies that will evolve as the project grows and is built to integrate with our existing backend services and mobile applications. This includes: Next.js/React.js with Server Side Rendering Re-usable component library styled using Tailwind CSS Zustand/TanStack Query for Data & State Management Backend API's written in C#/.NET Core Infrastructure More ❯

Software Engineer, with at least 3 years in .NET and C# 2+ years of experience in product companies (SaaS) 2 years of commercial experience with modern web frameworks like React/Angular/Vue Passion and strong skill for writing clean, maintainable, and testable code and well-documented C# code Experience with writing and maintaining Unit tests and E2E tests More ❯

Team: Frontend Location: London (On-site; Liverpool Street) Employment Type: Full-time and Permanent Remuneration: £90–120k Base Salary + Discretionary Bonus + Equity We are a stealth-mode AI laboratory researching and developing Machine Learning models. The founding team More ❯

Team: Frontend Location: London (On-site; Liverpool Street) Employment Type: Full-time and Permanent Remuneration: £90–120k Base Salary + Discretionary Bonus + Equity We are a stealth-mode AI laboratory researching and developing Machine Learning models. The founding team More ❯

Treefera is an AI-enabled data fabric delivering unmatched visibility into the first mile of commodity supply chains. Our platform provides transparency across both commodities and carbon, synthesizing vast datasets into actionable insights that mitigate risk, enhance resilience, improve efficiency More ❯

Treefera is an AI-enabled data fabric delivering unmatched visibility into the first mile of commodity supply chains. Our platform provides transparency across both commodities and carbon, synthesizing vast datasets into actionable insights that mitigate risk, enhance resilience, improve efficiency More ❯

Principal Software Engineer -C#/.Net,React Introduction: Are you searching for an opportunity to play a key role in driving the dramatic growth of a highly successful software company? At Poppulo, we're working on what's next in communications and workplace technology. As a pioneer in this industry, we understand that meaningfully reaching every employee is hard. And … or agentic coding tools, is strongly preferred. Key Responsibilities: Drive the migration and modernization of existing C#/.NET-based integration services to a contemporary web stack (TypeScript, NodeJS, React). Develop, maintain, and enhance scalable integrations and APIs to facilitate seamless third-party data exchange. Collaborate with product managers, architects, and frontend/backend engineers to ensure cohesive system … legacy systems to modern technology stacks. Practical experience or strong enthusiasm for AI and generative technologies. Strong experience with both C#/.NET and modern web technologies (TypeScript, NodeJS, React). Proficiency in relational databases (MS SQL) and data integration methodologies. Experience developing APIs and working with diverse third-party system integrations. Familiarity with AWS cloud services and serverless architecture More ❯

Working Structure: Hybrid (London-based) ▫️ Pay Type: £700 PAYE inside IR35 per day ▫️ Paid Holidays ▫️ Tech Stack: Node.js, React, Nest.js, Python, AWS, Kafka, Terraform ▫️ Focus Areas: Microservices, CI/CD, API-first design, AI integration ▫️ Culture: Agile, automation-first, customer-centric, continuous learning As a Senior Engineer, you are accountable for the quality, speed, and reliability of our microservices architecture … Be part of a collaborative, forward-thinking team building the next generation of microservices platforms. - Continuous learning, we believe, ongoing training is key to success. Our Tech Stack - Frontend: React - Backend: Nest.js, Python/fastapi, LangChain Test Automation: Pact, Jest, Cypress, and Pytest (including AI test automation) - Infrastructure: AWS ECS, PostgreSQL, Kafka (migrating from RabbitMQ) - Infrastructure as Code: Terraform (using More ❯

Working Structure: Hybrid (London-based) ▫️ Pay Type: £700 PAYE inside IR35 per day ▫️ Paid Holidays ▫️ Tech Stack: Node.js, React, Nest.js, Python, AWS, Kafka, Terraform ▫️ Focus Areas: Microservices, CI/CD, API-first design, AI integration ▫️ Culture: Agile, automation-first, customer-centric, continuous learning As a Senior Engineer, you are accountable for the quality, speed, and reliability of our microservices architecture … Be part of a collaborative, forward-thinking team building the next generation of microservices platforms. - Continuous learning, we believe, ongoing training is key to success. Our Tech Stack - Frontend: React - Backend: Nest.js, Python/fastapi, LangChain Test Automation: Pact, Jest, Cypress, and Pytest (including AI test automation) - Infrastructure: AWS ECS, PostgreSQL, Kafka (migrating from RabbitMQ) - Infrastructure as Code: Terraform (using More ❯

a collaborative mindset. Highly self-organized and technically driven. Solid experience with C#, .NET Core, and modern cloud environments (preferably Azure). Hands-on experience with frontend development using React and TypeScript. Understanding of database technologies like PostgreSQL/Timescale and MySQL. Familiarity with messaging systems like RabbitMQ and real-time technologies like SignalR. Knowledge of API development and integration More ❯

Senior Full Stack Developer – Kotlin/Java/React (Hybrid, London) We're working with an insurtech company that’s redefining how consumers experience insurance in the digital age. Their mission is to simplify and personalise the insurance journey, leveraging modern technology, intuitive design, and deep industry insight to deliver standout experiences – particularly in the automotive and mobility sectors. Responsibilities … Designing and developing backend services and REST APIs using Kotlin and Java Building and integrating front-end interfaces using React.js, TypeScript & PostgreSQL Creating and maintaining AWS Lambda functions and infrastructure using Terraform Collaborating closely with product, design, and domain experts in a fast-moving, agile environment Playing a key role in shaping architecture and tech strategy as the platform scales … Qualifications: 6+ years' experience with Kotlin/Java, React.js, and TypeScript A solid grasp of SQL and practical experience with PostgreSQL Comfortable working with infrastructure-as-code and DevOps practices in AWS Experience working in agile teams with strong CI/CD and testing culture Strong communication skills – you're able to explain complex technical topics clearly to non-technical More ❯

Senior Full Stack Developer – Kotlin/Java/React (Hybrid, London) We're working with an insurtech company that’s redefining how consumers experience insurance in the digital age. Their mission is to simplify and personalise the insurance journey, leveraging modern technology, intuitive design, and deep industry insight to deliver standout experiences – particularly in the automotive and mobility sectors. Responsibilities … Designing and developing backend services and REST APIs using Kotlin and Java Building and integrating front-end interfaces using React.js, TypeScript & PostgreSQL Creating and maintaining AWS Lambda functions and infrastructure using Terraform Collaborating closely with product, design, and domain experts in a fast-moving, agile environment Playing a key role in shaping architecture and tech strategy as the platform scales … Qualifications: 6+ years' experience with Kotlin/Java, React.js, and TypeScript A solid grasp of SQL and practical experience with PostgreSQL Comfortable working with infrastructure-as-code and DevOps practices in AWS Experience working in agile teams with strong CI/CD and testing culture Strong communication skills – you're able to explain complex technical topics clearly to non-technical More ❯

coaching, mentoring and supporting them in their key skills, accountabilities and development areas. Desirable skills include: 5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API Strong experience in working with Azure (preferably certified) including App Services, Azure Function, Service Bus Experience leading and mentoring small-to-medium hybrid teams …/CD processes, Service bus Architecture, Microservices, Functions, Web apps, IAC Experience developing REST API-driven mobile first web applications Experience of frontend application development, with a focus on React.js, Next.js and TypeScript Jira, Bitbucket, Git Flow, Confluence, Azure Devops, Azure App Centre, Service Bus Explorer, SSMS and agile software development process/practices and other productivity tools AI-driven More ❯

Senior Full Stack Engineer | Hybrid | £90,000 + 15% bonus | React.js | Python | TypeScript | AWS Are you passionate about renewable energy and seeking an opportunity to make a positive impact on the environment? La Fosse has partnered with a rapidly growing renewable energy company, seeking highly motivated Senior Full Stack Engineers to join their close-knit product team and drive innovation … in sustainable technology. Core Tech Stack: React.js, Python, TypeScript, FAST APIs, SQL Alchemy, Docker, AWS Role Responsibilities: Lead the development and enhancement of their in-house product management and customer-facing platforms, achieving feature parity with an existing SaaS solution and driving innovation post-migration to build a scalable, secure, market-leading system. Build scalable, secure full-stack applications using … React.js, TypeScript, Python, and FastAPI, following modern development best practises. Design and implement robust APIs and microservices, using SQL Alchemy and FastAPI for efficient backend architecture. Some of the benefits: 25 days of annual leave + Bank Holidays, and the option to purchase up to 5 additional days per year Annual salary reviews and Bonus of 15% Matching pension contributions More ❯

Senior Full Stack Engineer | Hybrid | £90,000 + 15% bonus | React.js | Python | TypeScript | AWS Are you passionate about renewable energy and seeking an opportunity to make a positive impact on the environment? La Fosse has partnered with a rapidly growing renewable energy company, seeking highly motivated Senior Full Stack Engineers to join their close-knit product team and drive innovation … in sustainable technology. Core Tech Stack: React.js, Python, TypeScript, FAST APIs, SQL Alchemy, Docker, AWS Role Responsibilities: Lead the development and enhancement of their in-house product management and customer-facing platforms, achieving feature parity with an existing SaaS solution and driving innovation post-migration to build a scalable, secure, market-leading system. Build scalable, secure full-stack applications using … React.js, TypeScript, Python, and FastAPI, following modern development best practises. Design and implement robust APIs and microservices, using SQL Alchemy and FastAPI for efficient backend architecture. Some of the benefits: 25 days of annual leave + Bank Holidays, and the option to purchase up to 5 additional days per year Annual salary reviews and Bonus of 15% Matching pension contributions More ❯

Technology team builds the systems that power global credit trading. Role Overview: Join the Credit Flow pre-trade engineering team as a Frontend Engineer. You’ll develop and deliver React-based UI components for trading platforms used by front-office teams. The role combines hands-on development with ownership of key UI initiatives and close collaboration with global teams. Key … Responsibilities Build and maintain UI components in React/TypeScript Deliver features from design to production Lead rollout and implementation of trading tools Ensure performance, security, and scalability of front-end systems What You Bring Bachelor's degree in Computer Science or closely related field Strong experience with React, TypeScript, JavaScript, HTML/CSS, NodeJS Knowledge of Git, Webpack, Jenkins More ❯