1 to 25 of 32 Permanent Senior Front-End Engineer (Client-Side Engineer) Jobs in London

Senior Frontend Engineer - React, Typescript, Linux, HTML, Financial services, Front End - Hybrid, London, Permanent. - £75,000 p.a … p.a My client, a leading global financial organisation, is currently looking for an experienced Senior Front End Engineer to join the organisation. You will be joining core Credit Flow pre-trade engineering team and will be working on UI initiatives and providing … financial services or strong understanding of financial systems and concepts is highly beneficial This is an excellent opportunity for an experienced Front End Engineer to join a rapidly evolving organization. More ❯

and personal growth, and foster asupportive and flexible work environment where everyone's contribution iswelcomed. And now we are looking for a Senior Front-end Engineer to join us as part of our team. About the project Big international company whose main business isrelated … perform all the management ofgift cards inthe ecosystem. Work schedule The schedule is flexible, shifted to later hours till 19-20:00 CET. Team 3 front-end, 1 back-end/devops, 1 QAA, 1 tech lead, 1 manager Tech Stack JavaScript, NextJS, React , AEM Asaqualified expert, You … multi-language e-commerce platform based on Next.js, React, AEM, Adobe Commerce, ensuring it meets business objectives, customer needs, and compliance requirements. Architect and develop front-end solutions using React, TypeScript, and AEM. Implement new React components and maintain existing ones according to product requirements, ensuring high load speed and adherence to More ❯

businesses and organizations to make data-driven decisions with precision and confidence. Job Description: We are seeking a Front-End Senior Software Engineer to join our team and play a key role in designing, developing, and maintaining high-quality software solutions. The ideal candidate … is a highly skilled problem solver with extensive experience in software development, architecture, and best practices. As a senior member of the team, you will mentor junior engineers, lead technical initiatives, and collaborate across teams to build scalable and efficient applications. Responsibilities Software Development:Design, develop, test, and maintain scalable and high-performance software solutions. Technical Leadership:Provide More ❯

About the role As the Signal Ocean Platform continues to grow, we're expanding our engineering team. We're looking for a Senior Front-End Engineer with experience in React, someone who is curious, proactive, and passionate about building high-quality digital solutions. Signal … QA, DevOps, and Continuous Integration. Master's or Bachelor's degree in Computer Science, a related technical field, or equivalent practical experience. 5+ years of front-end development experience building real-world web applications of medium-to-large scale and complexity. Demonstrable React, JS/TS, HTML, and CSS experience. Active interest More ❯

Fuse Energy is looking for a Senior Product Engineer with a Front-End focus to help us reinvent the energy experience from the ground up. This is more than a typical engineering role - you'll be deeply embedded in product thinking, customer empathy, and … ownership of key product experiences across our consumer web app and internal platforms. Build and ship responsive, performant UIs using React, TypeScript, Next.js, and modern front-end best practices. Collaborate closely with backend engineers to define APIs and data flows. Partner with design and product to deliver intuitive, elegant user experiences. Dig More ❯

ROLE: Senior Frontend Engineer(6 month contract) Two Circles is a global sports agency. We drive growth for sports properties by delivering deeper connections with fans, through the intelligent use of data and technology. We work with some of the world's biggest sports organisations - including the NFL, Premier League, Formula … audiences and revenue across ticketing, participation, sponsorship and media. JOB DESCRIPTION As part of our ongoing growth, we are expanding our technical team and looking for an experienced Senior Full Stack Engineer to join our London office. The chosen person will play an important role in influencing the rapidly growing Two Circles More ❯

to be comfortable planning for the future while simultaneously delivering for the present. There's a lot of space to learn, grow, and supercharge your career. As a Senior Engineer, you will: Drive the engineering direction across website projects and digital experiences, with the ability to produce polished work from inception through … features and improvements. What we'd like to see in you: 3+ years experience in an engineering role Extensive agency or start-up experience as an engineer, ideally having worked closely with different types of clients in a range of different industries. Strong, demonstrable experience in TypeScript, HTML, and CSS, and ideally React or … as an organisation. Fortify relationships with cross functional team members as well as broaden your connections across the organisation. Participate in the interview process for other engineer candidates. Have at least two large projects under your belt, plus numerous contributions to smaller projects. Feel entirely confident taking on a large project build from pre More ❯

Job Opportunity: Senior Web Frontend Engineer As a Senior Web Frontend Engineer, you'll engage with technologies like Typescript, React.js, MobX, Canvas, TailwindCSS, Turborepo, Vite, Playwright, and Web Performance. Salary Range: 70k€-100k€ + Stock-Options/BSPCE Responsibilities: Designing and implementing a More ❯

Senior Fullstack Engineer - Digital Scale-Up £450-£500/day Outside IR35 Hybrid - 1 day/week in London 3-month contract (likely to extend) We're hiring Senior Fullstack Engineers for a rapidly growing digital company expand its London team. This is an exciting opportunity to join a scale More ❯

build and maintain that product. We are constantly looking at ways to improve, as our product and company begin to scale. We are looking for a forward thinking Senior Frontend Engineer to come join us as we strive for Engineering excellence! We believe in ownership, and enablement of our experts, across many … UI/UX principles and hands-on experience working collaboratively with design teams, utilising tools like Figma. Proven track record of developing and integrating reusable front-end components, ideally from an existing Design System, ensuring consistency and scalability across the platform. Demonstrated ability to lead projects, drive technical decision-making, and contribute More ❯

Senior Frontend Engineer (React/React Native) Office: London Apply for this role About the company Emma is the app to manage all things money. Our mission is to empower millions of people to live a better and more fulfilling financial life. Emma was founded by engineers, who are extremely focused on More ❯

Requirements for the Position Candidates must meet the following criteria to be considered for this role: 1. Experience with Front-End Technologies At least 5 years of experience working with Front-End technologies, with a focus on React and TypeScript. 2. Ability to Architect … Front-End Code Ability to … architect secure, maintainable, and testable Front-End code. 3. Familiarity with Blockchain Experience with blockchain technologies, including: Proficiency in client-side signing and handling crypto transactions (e.g., Bitcoin, Ethereum). Familiarity with Web3 libraries (such as web3.js, ethers.js) and wallet integrations. Experience with decentralized applications (dApps) and understanding More ❯

system evolution, and ensure strategic tech integration. Enjoy flexible work, ongoing training, and a supportive, inclusive environment. Key Responsibilities: Design and develop modern, high-performance front-end applications using React and TypeScript, ensuring they meet the demanding needs of real-time trading environments. Plan and deliver solutions that align with business goals … and support intricate trading workflows Build resilient and maintainable user interfaces by implementing comprehensive testing strategies and code reviews Ensure that all front-end components are well-architected, scalable, and integrate seamlessly Collaborate effectively with cross-functional teams-including traders, backend engineers, and product managers Contribute actively to the decommissioning of legacy … guidance, and ensure that delivered solutions address real-world challenges faced by end users. Key Requirements: Demonstrated expertise in developing sophisticated front-end applications using React.js, JavaScript/TypeScript Proven experience building real-time trading or financial applications where high performance and low latency are essential for business More ❯

Senior Frontend Engineer -Angular TypeScript -London The Company Through the power of AI and Big Data this company have developed a number of data driven tools and platforms aimed at delivering a transparent financial solution. Focusing purely on sustainable investment! If you want the leave the planet clean and beautiful for the … company. This group has 4 arms: A Data Provider: Assessing the performance and sustainability of companies worldwide. AI: An advisory and technology company with an AI engineer for forecasting investment opportunities Asset Management: Investment management company investing in sustainable equities They focus on R&D of AI, ML, Data, Finance and sustainability. This company More ❯

Mintago is looking for a Senior Frontend engineer (individual contributor) to join our growing team. We're building sleek, responsive web applications with cutting-edge technologies and frameworks underpinned by TypeScript and React. You will join Mintago at the start of its engineering journey. As a crucial member of our team, you … strong drive to build scalable and performant software Increasing quality through best practice and high quality tooling Skills we'd like you to have Expert TypeScript engineer with a strong understanding of React Experienced with NextJS, preferably app router You consider unit testing a key part of software delivery You have used testing libraries More ❯

Japan, UK, France, Germany, Brazil, Sweden, China, USA, and South Korea, as well as India. Business Unit Mission: M3 Global Research, an M3 company is looking for a Senior Software Engineer, who can thrive in a fast-paced environment developing complex applications to join our cutting-edge engineering team. Our ideal candidate More ❯

Senior Front End D3 Javascript Software Engineer - Holborn Our Client wants to recruit a Senior Front End Software Developer with at least 7 to 10 years expertise of working with D3 React … including DOM manipulation and the JavaScript object model Familiarity with RESTful APIs Knowledge of modern authorization mechanisms, such as JSON Web Token Familiarity with modern front-end build pipelines and tools Experience with common front-end development tools such as Babel, Webpack, NPM, etc. More ❯

The ecosystem helps merchants unlock revenue potential through online bookings and automated marketing, integrated with platforms like Instagram, Facebook, and Google. Role Overview We are seeking an exceptional Senior Frontend Engineer to join our growing team. Reporting to the Team Lead , you will work within a cross-functional product team to design More ❯

the best technology in-house , using new data sources, machine learning and AI to make machines do the heavy lifting About the role We're looking for a Senior Frontend Software Engineer, with strong Typescript and React/NextJS experience, to work on one of our key web platforms. You'll join … and optimise conversion rates in our existing funnels, and answering questions with experiments and fast iteration, to maintaining, refactoring & improving our codebase and tooling. Our ideal engineer is detail focused and resourceful, and keen to understand the bigger picture outside of their product team, contributing to wider engineering and business initiatives that help us More ❯

each step of thepatient experience - from first contact and scheduling to clinical treatment and billing, to ensuring loyalty and recurring care. Aboutthe Opportunity We are looking for a Senior Frontend Engineerto join Henry Schein One. This role will be a key technical leader within the engineering team, responsible for architecting and delivering high-value, complex features in the More ❯

slow tools. We're a fast-moving, deeply technical team building the future of retail intelligence, one image at a time. The Role We're looking for a Senior Frontend Engineer to help shape and scale the way customers and field teams interact with our platform-across both web and iOS . More ❯

growing startup, building a platform for Data Scientists and Simulation Engineers to deploy Deep Physics Models. You will be one of a small team of Front-end Engineers, collaborating in a cross-functional team with autonomy to drive implementation decisions. Bring your expertise in building front-end More ❯

web and mobile. With our major technology transformation nearly complete, we're now focused on building next-generation experiences — and we're looking for a Frontend Engineer ready to help shape that future. You'll contribute to our customer-facing products, developing high-quality, scalable code, working closely with your squad, and supporting junior More ❯

including Instagram , Facebook and Google. Role Overview Given our exciting and progressive growth plans, we are looking for an exceptional SeniorFront-End Engineer to come join our global business. Working collaboratively in a cross-functional product teamwithin a tribe , you will be accountable for designinganddeveloping applications and coordinating with the More ❯

We currently have a number of remote engineers based in the UK, Germany, Turkey, Poland, Italy, Spain and Portugal. We're looking for an experienced frontend engineer to join the engineering team. You'll be working alongside a highly technical and motivated team and report to one of our Tech Leads. You would be … new features Write technical documentation of code, algorithms and APIs Help in drafting of end-user manuals Identify, evaluate and communicate front-end best practices. Skills Expert level knowledge of TypeScript or JavaScript (ES6), and most common Styling libraries. Strong grasp of the React Framework, relative patterns and … best practices. Good understanding of UI/UX best practices and considerations. Understanding of front-end observability with tools like Sentry, LogRocket, Datadog, or New Relic. Experience with CI/CD pipelines, like Github Actions, ArgoCD. Awareness of common front-end security risks (e.g. More ❯