16 senior frontend engineer jobs found

Senior Frontend Engineer (Contract) - Retail Digital Platform Location: West Yorkshire - 2 days per week Duration: Initial 6-Month Contract Rate: £450-£550 per day (Outside IR35) The Opportunity We're supporting a major UK retail organisation undergoing significant digital transformation across its e-commerce and customer experience platforms. They are looking for an experienced Senior Frontend Engineer to help deliver scalable, high-performance web applications and Progressive Web Apps (PWA) used by millions of customers. You'll work within agile product teams alongside Product Managers, UX Designers, Architects, Backend Engineers and QA specialists to build and enhance customer-facing digital experiences. Key Responsibilities Design, develop and maintain modern frontend applications using React and TypeScript Deliver scalable, maintainable and high-performing web solutions Collaborate with product and UX teams to translate business requirements into...

Senior Frontend Engineer (Contract) - Retail Digital Platform Location: West Yorkshire - 2 days per week Duration: Initial 6-Month Contract Rate: £450-£550 per day (Outside IR35) The Opportunity We're supporting a major UK retail organisation undergoing significant digital transformation across its E-commerce and customer experience platforms. They are looking for an experienced Senior Frontend Engineer to help deliver scalable, high-performance web applications and Progressive Web Apps (PWA) used by millions of customers. You'll work within agile product teams alongside Product Managers, UX Designers, Architects, Backend Engineers and QA specialists to build and enhance customer-facing digital experiences. Key Responsibilities Design, develop and maintain modern Front End applications using React and TypeScript Deliver scalable, maintainable and high-performing web solutions Collaborate with product and UX teams to translate business requirements into technical...

Senior Frontend Engineer (Contract) - Retail Digital Platform Location: West Yorkshire - 2 days per week Duration: Initial 6-Month Contract Rate: £450- £550 per day (Outside IR35) The Opportunity We 're supporting a major UK retail organisation undergoing significant digital transformation across its e-commerce and customer experience platforms. They are looking for an experienced Senior Frontend Engineer to help deliver scalable, high-performance web applications and Progressive Web Apps (PWA) used by millions of customers. You 'll work within agile product teams alongside Product Managers, UX Designers, Architects, Backend Engineers and QA specialists to build and enhance customer-facing digital experiences. Key Responsibilities Design, develop and maintain modern frontend applications using React and TypeScript Deliver scalable, maintainable and high-performing web solutions Collaborate with product and UX teams to translate business...

Outside IR35 | Senior Shopify Engineer | Contract Location: London (3 days in office) Day rate: £500-600 per day IR35: Outside We are looking for a Senior Shopify Engineer to join a retail scale up business on their Shopify journey. 📋 The Requirements for a Senior Shopify Engineer Shopify Plus Expert: Proven experience developing on Shopify Plus with an inside out knowledge of Liquid, Admin API, and Storefront API. Modern Frontend Stack: Proficiency in modern CSS and JavaScript frameworks. Architectural Thinking: Ability to build a library of reusable Sections and Blocks that empower commercial teams to move at lightning speed. Tooling & CI/CD: Comfortable with the Shopify CLI, GitHub, and automated CI/CD systems for safe, scalable releases. ✨ Why This Role is Different True Ownership: As a Senior Shopify Engineer, you won’t just hack it together, you’ll lead the way in building a codebase the whole team is proud of. Innovation:...

Joining a new project Ideally have worked on Financial Services Projects before (Payments would be great) Fullstack Experience Tech Stack - Kotlin Backend, JS/TS React Frontend Start date ASAP Duration 6 months (Likely to extend) 2/3 days / week in person working (London) Immediate Interviews The best bit about Red Badger is, of course, the team. We are really proud of our people; we support and learn a lot from each other; we work really hard but have fun doing it. We are a diverse group made up of 22 different nationalities, speaking 17 different languages. Our 3 founders, Dave, Cain and Stu, who have considerable tech and consultancy experience and still own 100% of the company. We've been consistently profitable and have grown responsibly from the beginning. We are based at Old Street in the heart of "tech city" and get thoroughly stuck in with the brilliant community around us. We run several meetups including the hugely popular React...

Senior Full Stack Engineer (Frontend/Mobile-Leaning) – Travel Tech Contract, Outside IR35 Remote (UK only) £400-500/day A fast-growing travel concierge startup needs a frontend/mobile-leaning engineer to build out their React Native app for iOS and Android. You'll be building: Mobile flows for onboarding, auth/OTP, trip planning, bookings, notifications, support Polished React Native UI across iOS and Android Integration with backend APIs (Node.js, Express.js, TypeScript, MongoDB) State management, navigation, offline handling, push notifications, deep links What you'll bring: Strong React Native and TypeScript skills Solid REST API integration experience Good grip on iOS/Android app lifecycle and release requirements Comfort working with Node.js/Express/MongoDB backends Startup/small-team pace Bonus points: Expo, React Navigation, Zustand/Redux Toolkit, React Query; mobile testing (Detox/Maestro); CI/CD for mobile, TestFlight/Play Console....

Internal Title: Senior Full Stack Developer Location: London, UK (Hybrid - typically 1-2 days per month in office) Contract: Permanent, Full-time OR Outside IR35 Contract, 6 months with view to extend Day Rate (contract): £500-550 per day Package (perm): £70,000 - £80,000 + 10% Bonus + 10% Shares + Benefits (see more below) About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering capability focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience. We work across complex, high-impact environments in both the public and private sector, delivering solutions where quality, scalability, and reliability are critical. About The Role We're hiring...

Senior Software Engineer x2 - Outside IR35 - Contract (Media Client) About the role Essential: Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with) Skills & Experience: Backend: Java, Maven, Dropwizard Frontend: TypeScript, React Python AWS, OpenSearch It would be nice if you have AI coding experience, and ideally some familiarity with more traditional ML techniques for things like entity recognition £500-600 per day...

Senior Software Engineer - Outside IR35 - Contract (Insurance) About the role Essential: Self-starter, someone who can pick up context quickly, drive outcomes efficiently, and to a high quality Competent in doing high-level designs, solution management, and scoping Understanding of data modelling best practices Ability to translate technical solutions to non-technical stakeholders and bring them on the journey Experience working in an agile delivery environment Experience working with React, TypeScript, Azure, Microsoft SQL, and Databricks (if they don’t have all of these, that’s workable, but be good to understand any they don’t have experience with) Frontend: React + TypeScript + Vite Material UI with Emotion for styling TanStack React Query 5 for server state React Router 7 React Hook Form+Yup for forms/validation MSAL for Entra ID auth Jest+Testing Library for unit tests; Playwrightfor E2E and visual tests Hosted as an Azure Static...

****3 Month Contract @ 500p/d (Outside IR35) The Role; We’re now looking for a Interim Lead Full-Stack Engineer to take ownership of solution design and lead delivery across a distributed engineering setup. You will: Own the design for key features of our solutions Organise and manage the work of a small squad of engineers Ensure that coding and testing standards are upheld This role offers the opportunity to work closely with the founders at a defining stage in our growth. Responsibilities; Solution design; Own the end-to-end solution design for new features within a defined architecture framework Make pragmatic decisions about trade-offs (scope, performance, scalability, security) in a fast-moving environment. Delivery leadership; Act as the day-to-day technical and delivery lead for a squad of engineers Define and manage the work: break down Product Requirement Documents and user stories into clear tasks, estimate effort, set...

Opportunity for a Senior Frontend Dev with expertise in React to working remotely on an initial 6-month contract outside IR35. You’ll join a team responsible for designing and delivering modern, scalable, and user-friendly web applications. The role involves working closely with product managers, designers, and backend engineers to build high-quality features, optimize application performance, and maintain a robust frontend architecture. The ideal candidate is passionate about creating exceptional user experiences, embraces engineering best practices, and thrives in a collaborative, agile environment. Skills React TypeScript JavaScript In return they're offering an initial 6-month contract, fully remote, outside IR35, paying up to £450/day. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

Opportunity for a Senior Frontend Dev with expertise in React to working remotely on an initial 6-month contract outside IR35. You’ll join a team responsible for designing and delivering modern, scalable, and user-friendly web applications. The role involves working closely with product managers, designers, and backend engineers to build high-quality features, optimize application performance, and maintain a robust frontend architecture. The ideal candidate is passionate about creating exceptional user experiences, embraces engineering best practices, and thrives in a collaborative, agile environment. Skills React TypeScript JavaScript In return they're offering an initial 6-month contract, fully remote, outside IR35, paying up to £450/day. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

Opportunity for a Senior Frontend Dev with expertise in React to working remotely on an initial 6-month contract outside IR35. You'll join a team responsible for designing and delivering modern, scalable, and user-friendly web applications. The role involves working closely with product managers, designers, and Back End engineers to build high-quality features, optimize application performance, and maintain a robust Front End architecture. The ideal candidate is passionate about creating exceptional user experiences, embraces engineering best practices, and thrives in a collaborative, agile environment. Skills React TypeScript JavaScript In return they're offering an initial 6-month contract, fully remote, outside IR35, paying up to £450/day. If you're interested and would like to know more, please apply through this advert and I'll be in touch.

UI Architect Global Financial Services/Payments Client Location: London - 2 days per week Rate: £550-£570 per day Contract: 6 months initial IR35 Status: Outside IR35 Role Overview We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation. They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern Front End platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the Front End ecosystem across multiple products. Key Responsibilities Define and own Front End architecture across a microservices-based platform Design scalable UI solutions aligned to API-first Back End services Establish reusable components, UI standards and enterprise design systems Define integration approaches with RESTful and...

Full Stack Engineer (Contract - Junior/Mid) Location: Hybrid - 3 days per week - London Day Rate : Up to £350 per day outside IR35 This is a unique opportunity to work on a highly sophisticated platform where AI sits at the heart of the product. The Opportunity You'll be working across a modern TypeScript monorepo, developing scalable features across the frontend, backend, data layer, and AI integrations. The role offers exposure to cutting-edge AI technologies while providing the opportunity to deepen your expertise under the guidance of an experienced software architect. If you're passionate about modern engineering, enjoy solving complex technical challenges, and are eager to work at the forefront of AI-powered software development, we'd love to hear from you. Tech Stack: TypeScript, React, Node.js, Next.js Tailwind CSS SQLite AI integrations including Anthropic Claude, OpenAI, and Google Gemini GitHub Actions CI/CD Microsoft Azure (migration...

UI Architect Global Financial Services/Payments Client Location: London - 2 days per week Rate: £550-£570 per day Contract: 6 months initial IR35 Status: Outside IR35 Role Overview We are supporting a global financial services organisation operating in cross-border payments and emerging markets as they continue a large-scale technology transformation. They are looking for an experienced UI Architect to lead the design and delivery of scalable, modern Front End platforms aligned to a microservices architecture. This is a hands-on architecture role with responsibility for defining standards, driving best practice and shaping the Front End ecosystem across multiple products. Key Responsibilities Define and own Front End architecture across a microservices-based platform Design scalable UI solutions aligned to API-first Back End services Establish reusable components, UI standards and enterprise design systems Define integration approaches with RESTful and...