251 to 275 of 321 Front End Development Jobs in London

backed by prominent investors from the US and the UK, including institutional VC funds and C-level executives of global technology companies. The role involves the design and development of a web-based application for Machine Learning workloads. We put strong emphasis on user experience, aesthetics and pixel-perfect design. You will be working closely with the … TanStack, and Radix UI. We use Figma for wireframes and ideation. We are highly confident in our backend API schemas and functionality. What we are looking for: Frontend development: 5+ years of industry experience in frontend engineering, developing and designing responsive web applications using TypeScript. Excellent knowledge of the frontend fundamentals: In-depth knowledge of the core More ❯

backed by prominent investors from the US and the UK, including institutional VC funds and C-level executives of global technology companies. The role involves the design and development of a web-based application for Machine Learning workloads. We put strong emphasis on user experience, aesthetics and pixel-perfect design. You will be working closely with the … TanStack, and Radix UI. We use Figma for wireframes and ideation. We are highly confident in our backend API schemas and functionality. What we are looking for: Frontend development: 5+ years of industry experience in frontend engineering, developing and designing responsive web applications using TypeScript. Excellent knowledge of the frontend fundamentals: In-depth knowledge of the core More ❯

backed by prominent investors from the US and the UK, including institutional VC funds and C-level executives of global technology companies. The role involves the design and development of a web-based application for Machine Learning workloads. We put strong emphasis on user experience, aesthetics and pixel-perfect design. You will be working closely with the … TanStack, and Radix UI. We use Figma for wireframes and ideation. We are highly confident in our backend API schemas and functionality. What we are looking for: Frontend development: 5+ years of industry experience in frontend engineering, developing and designing responsive web applications using TypeScript. Excellent knowledge of the frontend fundamentals: In-depth knowledge of the core More ❯

backed by prominent investors from the US and the UK, including institutional VC funds and C-level executives of global technology companies. The role involves the design and development of a web-based application for Machine Learning workloads. We put strong emphasis on user experience, aesthetics and pixel-perfect design. You will be working closely with the … TanStack, and Radix UI. We use Figma for wireframes and ideation. We are highly confident in our backend API schemas and functionality. What we are looking for: Frontend development: 5+ years of industry experience in frontend engineering, developing and designing responsive web applications using TypeScript. Excellent knowledge of the frontend fundamentals: In-depth knowledge of the core More ❯

Senior Frontend Developer (React) – Series A GenAI Security Scale-up 🔐 💰 Salary: £120,000 - £135,000 (DOE) + equity + benefits 📍 Hybrid: 2 days/week in Central London office (Kings Cross/Covent Garden area) A Series A, high-growth More ❯

Senior Frontend Developer (React) – Series A GenAI Security Scale-up 🔐 💰 Salary: £120,000 - £135,000 (DOE) + equity + benefits 📍 Hybrid: 2 days/week in Central London office (Kings Cross/Covent Garden area) A Series A, high-growth More ❯

Senior Frontend Developer (React) – Series A GenAI Security Scale-up 🔐 💰 Salary: £120,000 - £135,000 (DOE) + equity + benefits 📍 Hybrid: 2 days/week in Central London office (Kings Cross/Covent Garden area) A Series A, high-growth More ❯

Senior Frontend Developer (React) – Series A GenAI Security Scale-up 🔐 💰 Salary: £120,000 - £135,000 (DOE) + equity + benefits 📍 Hybrid: 2 days/week in Central London office (Kings Cross/Covent Garden area) A Series A, high-growth More ❯

be joining a multidisciplinary AI/ML team responsible for developing the infrastructure and software that powers cutting-edge research and intelligent applications. The role focuses on backend development in Python, integrating AI components with data, compute, and frontend systems to create scalable, high-performance solutions. Day-to-day responsibilities include: Designing and implementing backend services for … and well-documented code following best practices. Developing and monitoring metrics to improve system reliability and performance. Collaborating closely with frontend engineers, data engineers, and ML specialists to build end-to-end pipelines. Participating in agile ceremonies and code reviews to uphold quality and delivery standards. Tech Stack & Skills Core skills: Strong Python backend development experience (FastAPI or similar frameworks) Cloud-native deployment experience (preferably Google Cloud and Cloud Run) Unit testing experience (pytest or similar frameworks) Familiarity with agile development and CI/CD processes Strong understanding of Git/GitHub workflows and DevOps tooling Nice to have: Experience with Docker or multi-container application architecture Familiarity with More ❯

assets and developing our innovative Retrieval-Augmented Generation (RAG) product. This role will place you at the intersection of advanced Large Language Models (LLMs), intelligent agents, and application development, contributing to the next generation of AI-driven solutions. Key Responsibilities: Backend Development: Design, develop, and maintain scalable backend services using Python. Integrate these services … with LLMs, agents, and document processing frameworks to create robust solutions. Frontend Development: Build intuitive and responsive frontend interfaces using React, ensuring a seamless user experience. Collaboration: Work closely with cross-functional teams to design and implement AI-powered applications and solutions that meet business needs. AI Product Development: Contribute to the development … the scalability and efficiency of our AI assets. Stay abreast of emerging AI technologies, including LLMs, agentic architectures, and application integrations. Skills & Experience: Proven expertise in full stack development with a strong focus on Python (backend) and React (frontend). In-depth knowledge of Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and related AI/ML More ❯

assets and developing our innovative Retrieval-Augmented Generation (RAG) product. This role will place you at the intersection of advanced Large Language Models (LLMs), intelligent agents, and application development, contributing to the next generation of AI-driven solutions. Key Responsibilities: Backend Development: Design, develop, and maintain scalable backend services using Python. Integrate these services … with LLMs, agents, and document processing frameworks to create robust solutions. Frontend Development: Build intuitive and responsive frontend interfaces using React, ensuring a seamless user experience. Collaboration: Work closely with cross-functional teams to design and implement AI-powered applications and solutions that meet business needs. AI Product Development: Contribute to the development … the scalability and efficiency of our AI assets. Stay abreast of emerging AI technologies, including LLMs, agentic architectures, and application integrations. Skills & Experience: Proven expertise in full stack development with a strong focus on Python (backend) and React (frontend). In-depth knowledge of Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), and related AI/ML More ❯

data scale-up. What's in it for you: Competitive salary, to £100k + Significant Equity Hybrid working (3 days London office per week) Vitality Healthcare Continuous career development and learning opportunities Influential role as part of a small, close knit team Complex and interesting work Your role: As a Senior Software Engineer you will take ownership … working on technically challenging Greenfield development projects. You'll be working on complex problems with scalability and reliability in mind, across the full development lifecycle from architecture and design through to implementation. There's a range of technology in the stack, you'll have a 50/50 split between backend and frontend development More ❯

data scale-up. What's in it for you: Competitive salary, to £100k + Significant Equity Hybrid working (3 days London office per week) Vitality Healthcare Continuous career development and learning opportunities Influential role as part of a small, close knit team Complex and interesting work Your role: As a Senior Software Engineer you will take ownership … working on technically challenging Greenfield development projects. You'll be working on complex problems with scalability and reliability in mind, across the full development lifecycle from architecture and design through to implementation. There's a range of technology in the stack, you'll have a 50/50 split between backend and frontend development More ❯

Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your primary focus will be on … product team. While this is primarily an engineering role, we are always looking for developers who have a keen eye for product and who can contribute to the development of features at a product level before they are implemented. If you are eager to be part of a dynamic team, contribute to Travelex's digital-first strategy … and mentoring junior team members when needed Knowledge of best practices in security, performance and accessibility Skills, knowledge, and experience: Must have: 8+ years of experience in frontend development Demonstrated strong fluency with TypeScript, Next.js and React Experience with design systems, component libraries and Storybook Familiarity with state management libraries Experience with the testing pyramid and tools More ❯

Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your primary focus will be on … product team. While this is primarily an engineering role, we are always looking for developers who have a keen eye for product and who can contribute to the development of features at a product level before they are implemented. If you are eager to be part of a dynamic team, contribute to Travelex's digital-first strategy … and mentoring junior team members when needed Knowledge of best practices in security, performance and accessibility Skills, knowledge, and experience: Must have: 8+ years of experience in frontend development Demonstrated strong fluency with TypeScript, Next.js and React Experience with design systems, component libraries and Storybook Familiarity with state management libraries Experience with the testing pyramid and tools More ❯

Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your primary focus will be on … product team. While this is primarily an engineering role, we are always looking for developers who have a keen eye for product and who can contribute to the development of features at a product level before they are implemented. If you are eager to be part of a dynamic team, contribute to Travelex's digital-first strategy … and mentoring junior team members when needed Knowledge of best practices in security, performance and accessibility Skills, knowledge, and experience: Must have: 8+ years of experience in frontend development Demonstrated strong fluency with TypeScript, Next.js and React Experience with design systems, component libraries and Storybook Familiarity with state management libraries Experience with the testing pyramid and tools More ❯

Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your primary focus will be on … product team. While this is primarily an engineering role, we are always looking for developers who have a keen eye for product and who can contribute to the development of features at a product level before they are implemented. If you are eager to be part of a dynamic team, contribute to Travelex's digital-first strategy … and mentoring junior team members when needed Knowledge of best practices in security, performance and accessibility Skills, knowledge, and experience: Must have: 8+ years of experience in frontend development Demonstrated strong fluency with TypeScript, Next.js and React Experience with design systems, component libraries and Storybook Familiarity with state management libraries Experience with the testing pyramid and tools More ❯

Are you an experienced Frontend Developer looking for a new challenge and to work for an AI startup with an important mission? 🚀 Senior Frontend Developer – AI Data Security 🚀 Location : Hybrid working 1-3 days a week in central London (King More ❯

Are you an experienced Frontend Developer looking for a new challenge and to work for an AI startup with an important mission? 🚀 Senior Frontend Developer – AI Data Security 🚀 Location : Hybrid working 1-3 days a week in central London (King More ❯

Senior Frontend Developer React/Typescript Central London 2 days a week in the office £60,000 - £70,000 This company are one of the biggest and most successful businesses within their niche FinTech market space and have massive plans More ❯

Senior Frontend Developer React/Typescript Central London 2 days a week in the office £60,000 - £70,000 This company are one of the biggest and most successful businesses within their niche FinTech market space and have massive plans More ❯

be joining a multidisciplinary AI/ML team responsible for developing the infrastructure and software that powers cutting-edge research and intelligent applications. The role focuses on backend development in Python , integrating AI components with data, compute, and frontend systems to create scalable, high-performance solutions. Day-to-day responsibilities include: Designing and implementing backend services for … and well-documented code following best practices. Developing and monitoring metrics to improve system reliability and performance. Collaborating closely with frontend engineers, data engineers, and ML specialists to build end-to-end pipelines. Participating in agile ceremonies and code reviews to uphold quality and delivery standards. Tech Stack & Skills Core skills: Strong Python backend development experience (FastAPI or similar frameworks) Cloud-native deployment experience (preferably Google Cloud and Cloud Run) Unit testing experience (pytest or similar frameworks) Familiarity with agile development and CI/CD processes Strong understanding of Git/GitHub workflows and DevOps tooling Nice to have: Experience with Docker or multi-container application architecture Familiarity with More ❯

Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior … UI Trading Software Developer to work in a Front Office environment with Traders, Quants and Portfolio Managers within a Front Office Trading Floor. This is a high profile role for a Multi Asset Trading Team within a Front Office environment. As the Senior Trading UI Developer, you will have extensive experience of working with the JavaScript Framework … including ES7 and HTML and CSS. You will be working directly with Portfolio Managers, Sales Traders and Quants and end users where you will be responsible for specing out, designing and developing of UI screens for the users. This will require you to have client facing experience as well as low levy programming with JavaScript and React Development More ❯

Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior … UI Trading Software Developer to work in a Front Office environment with Traders, Quants and Portfolio Managers within a Front Office Trading Floor. This is a high profile role for a Multi Asset Trading Team within a Front Office environment. As the Senior Trading UI Developer, you will have extensive experience of working with the JavaScript Framework … including ES7 and HTML and CSS. You will be working directly with Portfolio Managers, Sales Traders and Quants and end users where you will be responsible for specing out, designing and developing of UI screens for the users. This will require you to have client facing experience as well as low levy programming with JavaScript and React Development More ❯

Trading UI Engineer – Front Office JavaScript, React, typescript, NodeJS, Tailwind, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API. Real Time Trading Software, UI Development Perm Role – London – Onsite. £80000 - £100000 plus bonus Harrington Starr has partnered up with a Global Investment Bank in the City of London who are looking to hire a Senior … UI Trading Software Developer to work in a Front Office environment with Traders, Quants and Portfolio Managers within a Front Office Trading Floor. This is a high profile role for a Multi Asset Trading Team within a Front Office environment. As the Senior Trading UI Developer, you will have extensive experience of working with the JavaScript Framework … including ES7 and HTML and CSS. You will be working directly with Portfolio Managers, Sales Traders and Quants and end users where you will be responsible for specing out, designing and developing of UI screens for the users. This will require you to have client facing experience as well as low levy programming with JavaScript and React Development More ❯