201 to 225 of 242 React Jobs in the City of London

Founding Software Engineer (React and Python) About the Opportunity You will be joining an elite founding engineering team that includes the world’s number one authority in Multi Agent Reinforcement Learning, seasoned Meta Product leaders, and one of the only people in the UK who has trained a trillion token language model from scratch. This role is based in London … technology critical environments • Deep familiarity with large scale model training and production deployment, especially for reinforcement learning or transformer based architectures • Hands on experience building and maintaining Frontend applications - React, Typescript • Strong programming background in Python and or relevant frameworks such as TensorFlow, PyTorch or Hugging Face • Fluent in cloud native development, containerisation, orchestration (for example Docker or Kubernetes) and More ❯

something with. Proper ownership. Fast cycles, low ceremony, and room to shape architecture while mentoring others. What you’ll work with as a Staff Software Engineer Stack: Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS. Setup: Cross-functional squads that care about outcomes, not ticket-ticking. You’ll improve scalability, evolve architecture, and still ship. I like that balance. Less pontificating … re just curious, I’m happy to share the full brief and talk through fit. Senior Software Engineer London, Staff Software Engineer, Principal Engineer, Fintech jobs London, Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS, scalable systems, distributed systems, hybrid jobs London #hiring #softwareengineering #seniorsoftwareengineer #principalengineer #staffengineer #fintech #londonjobs #python #react #typescript #aws #postgresql #snowflake #careers More ❯

something with. Proper ownership. Fast cycles, low ceremony, and room to shape architecture while mentoring others. What you’ll work with as a Staff Software Engineer Stack: Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS. Setup: Cross-functional squads that care about outcomes, not ticket-ticking. You’ll improve scalability, evolve architecture, and still ship. I like that balance. Less pontificating … re just curious, I’m happy to share the full brief and talk through fit. Senior Software Engineer London, Staff Software Engineer, Principal Engineer, Fintech jobs London, Python, TypeScript, React, Svelte, PostgreSQL, Snowflake, AWS, scalable systems, distributed systems, hybrid jobs London #hiring #softwareengineering #seniorsoftwareengineer #principalengineer #staffengineer #fintech #londonjobs #python #react #typescript #aws #postgresql #snowflake #careers More ❯

Role: Senior Product Engineer (Fullstack) Salary/Package: £90k-£130k + Equity Options Company Sector: AI Start Up Experience Level: Senior (5+ years) Tech: JavaScript, TypeScript, Node.js, React.js, AWS Location: Central London Working Arrangement: 5 Days a week in the office Product Engineer (Full Stack) Help shape the future of human–computer interaction by building fast, delightful, intelligent products. We … Collaborate closely with engineers, designers, and product leads to craft elegant, high-impact solutions What you bring Strong experience building full-stack web applications Proficiency with TypeScript, Node.js, and React (experience with tools like Tailwind, Radix, or Framer Motion is a plus) Solid understanding of Postgres or similar relational databases Exposure to cloud infrastructure (AWS or similar; Terraform a plus More ❯

Role: Senior Product Engineer (Fullstack) Salary/Package: £90k-£130k + Equity Options Company Sector: AI Start Up Experience Level: Senior (5+ years) Tech: JavaScript, TypeScript, Node.js, React.js, AWS Location: Central London Working Arrangement: 5 Days a week in the office Product Engineer (Full Stack) Help shape the future of human–computer interaction by building fast, delightful, intelligent products. We … Collaborate closely with engineers, designers, and product leads to craft elegant, high-impact solutions What you bring Strong experience building full-stack web applications Proficiency with TypeScript, Node.js, and React (experience with tools like Tailwind, Radix, or Framer Motion is a plus) Solid understanding of Postgres or similar relational databases Exposure to cloud infrastructure (AWS or similar; Terraform a plus More ❯

and scale backend systems powering payments, returns, personalisation, and more. Lead API-first development , data modelling, and performance optimisation. Build reliable systems in TypeScript , working across the stack with React on the frontend. Own deep integrations with Shopify APIs and third-party services (not just theme edits). Collaborate closely with product and design in a lean, high-impact team. … Embrace automation and AI tooling to accelerate delivery and maintain quality. Tech Stack Languages: TypeScript (core), Python/Ruby (data flows) Frontend: React (preferred), Node.js welcome Infrastructure: AWS Databases: RDBMS (essential), Neo4j (nice-to-have) Integrations: Shopify APIs, payment gateways, fraud tools You’ll Thrive Here If You... Have strong backend engineering fundamentals (schema design, query optimisation, scalable architectures). … scale. Interview Process 30-min culture & tech fit conversation 60–90 min technical scenario interview (no whiteboarding) Offer Ideal for senior full stack or backend engineers with TypeScript/React/AWS experience who want to shape architecture at a growing, product-led company. More ❯

and scale backend systems powering payments, returns, personalisation, and more. Lead API-first development , data modelling, and performance optimisation. Build reliable systems in TypeScript , working across the stack with React on the frontend. Own deep integrations with Shopify APIs and third-party services (not just theme edits). Collaborate closely with product and design in a lean, high-impact team. … Embrace automation and AI tooling to accelerate delivery and maintain quality. Tech Stack Languages: TypeScript (core), Python/Ruby (data flows) Frontend: React (preferred), Node.js welcome Infrastructure: AWS Databases: RDBMS (essential), Neo4j (nice-to-have) Integrations: Shopify APIs, payment gateways, fraud tools You’ll Thrive Here If You... Have strong backend engineering fundamentals (schema design, query optimisation, scalable architectures). … scale. Interview Process 30-min culture & tech fit conversation 60–90 min technical scenario interview (no whiteboarding) Offer Ideal for senior full stack or backend engineers with TypeScript/React/AWS experience who want to shape architecture at a growing, product-led company. More ❯

bright and ambitious Software Engineer to join our team and help take our product to the next level. As a full-stack engineer, you’ll contribute to both our React front-end applications and our Python/Django back-end components . Please note: for this role, you must be based in the UK and have the right to work … experience in software development Experience working in an agile delivery environment Proficiency in either TypeScript or Python , and a comfortable level of experience in the other Strong experience with React , and familiarity with component libraries, design systems, and frameworks A solid understanding of how to write and consume APIs The ability not only to write code, but to understand its … your abilities and potential Our standard benefits package Merit-based career progression in a growing company The best tools to help you do your job well Our technology stack: React/TypeScript Python Django REST Framework AWS How to apply - please read: After applying via LinkedIn, please also send an email to join-tech@gurunow.ai answering the following. Please include More ❯

Founding Software Engineer - AI Startup - Up to £150k 📍 London, Hybrid, 3 days in office 💰 £100–150k + generous equity 💻 Python, TypeScript, React + AI/ML toolings I'm working with a high-calibre, VC-backed startup that's building the infrastructure layer for intelligent human-AI collaboration, especially within regulated and high-complexity industries. They’ve assembled a world … looking for an exceptional Founding Engineer to help build their core platform. ✅ Ideal profile: 5+ years engineering experience (startup background preferred) Strong backend & full-stack skills (Python, Django, TypeScript, React) Hands on builder with high autonomy and bias to action Bonus: experience with LLMs, cloud infra, CI/CD, or academic/OSS projects 🧠 Why this role: Huge ownership in More ❯

Graduate Software Engineer - JavaScript/React/Node | £40–50K | Camden (Hybrid) Join a VC-backed AI SaaS startup that's helping chemical and cosmetics companies launch products globally - solving complex regulatory problems through software. They've raised £3M seed, hit £500K+ in revenue, and are building an all-star team of devs from top UK universities. You’ll work … Have a 1st class degree from Imperial, UCL, Cambridge, Oxford, Durham, Bath, etc. Have a passion for building (show us your GitHub or side projects!) Are confident with JavaScript, React, Next.js, Tailwind, Node.js Care about clean code, thoughtful UX, and solving problems end to end Are London-based and up for 3 days/week in our Camden office (Mon More ❯

Graduate Software Engineer - JavaScript/React/Node | £40–50K | Camden (Hybrid) Join a VC-backed AI SaaS startup that's helping chemical and cosmetics companies launch products globally - solving complex regulatory problems through software. They've raised £3M seed, hit £500K+ in revenue, and are building an all-star team of devs from top UK universities. You’ll work … Have a 1st class degree from Imperial, UCL, Cambridge, Oxford, Durham, Bath, etc. Have a passion for building (show us your GitHub or side projects!) Are confident with JavaScript, React, Next.js, Tailwind, Node.js Care about clean code, thoughtful UX, and solving problems end to end Are London-based and up for 3 days/week in our Camden office (Mon More ❯

Senior FE Engineer (Remote UK & Europe) React, TypeScript, GraphQL Salary up to £95k + Benefits Are you passionate about crafting beautifully engineered, maintainable systems — and helping others do the same? We're looking for a Senior Software Engineer to join a fast-growing, product-led tech company that's redefining how engineering teams deliver value through smarter insights and modern … foster a culture of technical excellence and growth Continuously improve delivery processes using cutting-edge AI tools 👀 About You 5–7 years in commercial software development Strong experience with React , TypeScript , and/or GraphQL (backend skills in Node.js , Python , or Go a plus) Comfortable designing and contributing to design systems and component libraries Familiar with microfrontend principles and modular More ❯

the founder and founding engineers to create a tool that simplifies the software development process. Design, develop, and scale both front-end and back-end systems using TypeScript and React , and . Node.Js for backend. Contribute to a monorepo architecture and design elegant, high-quality solutions that solve complex technical challenges. Collaborate closely with the team to iterate and deliver … re Looking For Experience as a founding engineer, with an ambition to move into a CTO position within the next year Strong coder, ideally with experience in TypeScript and React alongside, back-end, and infrastructure development. Strong experience in full-stack engineering , preferably with a lean to the backend and in a monorepo setup. Solid experience with SQL and a More ❯

the founder and founding engineers to create a tool that simplifies the software development process. Design, develop, and scale both front-end and back-end systems using TypeScript and React , and . Node.Js for backend. Contribute to a monorepo architecture and design elegant, high-quality solutions that solve complex technical challenges. Collaborate closely with the team to iterate and deliver … re Looking For Experience as a founding engineer, with an ambition to move into a CTO position within the next year Strong coder, ideally with experience in TypeScript and React alongside, back-end, and infrastructure development. Strong experience in full-stack engineering , preferably with a lean to the backend and in a monorepo setup. Solid experience with SQL and a More ❯

systems by migrating infrastructure to AWS and Snowflake, improving scalability and maintainability. Develop solutions using C#, Python, SQL Server, and cloud-native tools, alongside modern UI frameworks such as React or Angular. Provide ongoing production support for mission-critical systems during trading hours and end-of-day processes. Work with senior developers to define best practices and implement components of … and database design expertise. Hands-on experience with AWS, Snowflake, and modern software architecture. Solid grasp of data structures, concurrency, and memory management. Experience developing responsive, performant UIs using React, Angular, or Vue.js; familiarity with PowerBI or other BI tools is a plus. Effective communicator capable of working directly with business users and senior stakeholders. Adaptable and collaborative mindset, thriving More ❯

systems by migrating infrastructure to AWS and Snowflake, improving scalability and maintainability. Develop solutions using C#, Python, SQL Server, and cloud-native tools, alongside modern UI frameworks such as React or Angular. Provide ongoing production support for mission-critical systems during trading hours and end-of-day processes. Work with senior developers to define best practices and implement components of … and database design expertise. Hands-on experience with AWS, Snowflake, and modern software architecture. Solid grasp of data structures, concurrency, and memory management. Experience developing responsive, performant UIs using React, Angular, or Vue.js; familiarity with PowerBI or other BI tools is a plus. Effective communicator capable of working directly with business users and senior stakeholders. Adaptable and collaborative mindset, thriving More ❯

the founder and founding engineers to create a tool that simplifies the software development process. Design, develop, and scale both front-end and back-end systems using TypeScript and React , and . Node.Js for backend. Contribute to a monorepo architecture and design elegant, high-quality solutions that solve complex technical challenges. Collaborate closely with the team to iterate and deliver … They’re Looking For Experience as a founding engineer, with an ambition to move into a CTO position in the future Strong coder, ideally with experience in TypeScript and React alongside, back-end, and infrastructure development. Strong experience in full-stack engineering , preferably lean more towards back-end engineering and in a monorepo setup. Solid experience with SQL and a More ❯

the founder and founding engineers to create a tool that simplifies the software development process. Design, develop, and scale both front-end and back-end systems using TypeScript and React , and . Node.Js for backend. Contribute to a monorepo architecture and design elegant, high-quality solutions that solve complex technical challenges. Collaborate closely with the team to iterate and deliver … They’re Looking For Experience as a founding engineer, with an ambition to move into a CTO position in the future Strong coder, ideally with experience in TypeScript and React alongside, back-end, and infrastructure development. Strong experience in full-stack engineering , preferably lean more towards back-end engineering and in a monorepo setup. Solid experience with SQL and a More ❯

Senior/Lead Hands on Full Stack Developer - React/Python London | Hybrid (3days in the office and 2 days from home) £110,000+ Equity | Full-Time | Start-up We're a high-growth start-up building a leading healthcare! Looking for a Full Stack developer who loves working across the stack - React on the front end, Python on the … back end. You'll: Build responsive UIs in React Develop APIs & services in Python (either Django/Flask/FastAPI) Own features end-to-end Help shape our tech stack You have: Strong React & Python skills API & database experience A proactive, problem-solving mindset Ideally start-up or scale-up experience Why us? Big impact from day one Technical ownership More ❯

Senior Software Engineer Node.js/AWS/React London (Hybrid, 3 days onsite) Are you the kind of Senior Software Engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust? This is a chance for a Senior Software Engineer to join a small, but ambitious tech-for-good/IoT startup based … cleaner, more maintainable code What were looking for: Strong hands-on experience with Node.js backend software development Comfortable working across or picking up other tech as needed ie AWS, React etc (If you have experience with AWS & React, that is a bonus) Enthusiasm for writing clean, tested, production-ready code Experience (or interest) in data-heavy systems, IoT, or connected More ❯

that help them identify, assess, manage, and mitigate risks effectively. Their platform offers software solutions that support enterprise risk management, compliance management, health and safety, and incident reporting. Stack: React, Node, Nextjs, AWS Responsibilites: Develop and maintain responsive web applications using React and Next.js for frontend development. Write scalable, reusable, and efficient TypeScript code for both frontend and backend. Build More ❯

that help them identify, assess, manage, and mitigate risks effectively. Their platform offers software solutions that support enterprise risk management, compliance management, health and safety, and incident reporting. Stack: React, Node, Nextjs, AWS Responsibilites: Develop and maintain responsive web applications using React and Next.js for frontend development. Write scalable, reusable, and efficient TypeScript code for both frontend and backend. Build More ❯

SR2 are currently looking for a Principal Software Engineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal & external stakeholders. Ability More ❯

SR2 are currently looking for a Principal Software Engineer (Python/React) for a fast-growing start-up company in London. Location: Central London (2-3 days a week onsite). Salary: £100 - 120k. What we are looking for: Key skills: Python, React, TypeScript & AWS. Proven track record in a client-facing technical role, dealing with internal & external stakeholders. Ability More ❯

Senior Frontend Engineer – Next.js/React Location: Monument WeWork in London Type: Full-Time About Admanage.ai We’re building the Cursor for ad management. Admanage.ai helps companies launch ads 10x faster on Meta & TikTok. Created by top performance marketers who’ve managed over $50M+ in ad spend. Our mission? Level the playing field by giving every business access to enterprise … management, testing, and performance. You’re not here to maintain, you’re here to build a complex UI that’s robust and well-tested. 🔧 Tech Stack Frontend: Next.js 14, React 18, TailwindCSS, Radix UI, Framer Motion State Management: Zustand Testing: Vitest Backend (light exposure): Node.js, Prisma, MySQL Infra: R2 Cloudfalre, AWS S3, Vercel Auth: NextAuth.js APIs: Facebook Marketing API, TikTok … safe continuous deployment Ship features end-to-end: idea → build → optimize for robust testing, speed and UX You Might Be a Fit If You... Have 5+ years building production React/Next.js apps Are skilled at state management in large, complex apps Believe testing is part of building, not an afterthought Care about performance, UX, and clean design systems Communicate More ❯