6 senior frontend engineer jobs found in London, greater london

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:...

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 - 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...

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...