20 of 20 Front-End Developer (Client-Side Developer) Jobs in London

Front-End Developer Location: London Working Pattern: Full-time (Hybrid 3 days onsite) Security Clearance: Must be eligible for SC and DV Clearance Salary : £52,000 - £72,000 + 10% bonus + £7,000 tax-free DV Bonus Overview An industry-leading … digital and cyber consultancy within the defence and national security space is seeking a Front-End Developer to join its growing National Security practice. This organisation brings together thousands of digital, cyber and intelligence specialists across multiple countries, delivering cutting-edge solutions ...

Front-End Developer Location: London Working Pattern: Full-time (Hybrid 3 days onsite) Security Clearance: Must be eligible for SC and DV Clearance Salary : £52,000 - £72,000 + 10% bonus + £7,000 tax-free DV Bonus Overview An industry-leading … digital and cyber consultancy within the defence and national security space is seeking a Front-End Developer to join its growing National Security practice click apply for full job details ...

Job Title: Frontend Engineer – React/TypeScript/Next.js Location: London (Hybrid – 2‐3 days in office) Salary: £70,000 – £75,000 + Equity About the Company You’ll join a fast‐scaling SaaS business ...

Our client, a large enterprise, is seeking a Senior Full- Stack Engineer to join an established trading platform programme. This production- critical system is long- lived, actively evolving, and places strong emphasis on ...

Frontend Engineer STS Digital (www.stsdigital.io) is a leading regulated digital asset trading firm specialising in OTC trading and market making. While trading is headquartered in Bermuda, technology development is provided by a vibrant global engineering ...

React Developer SC cleared Active SC Cleared required Inside of IR35 Role Overview We are seeking a Senior Front-End Developer to lead the delivery of accessible user-centric interfaces for a secure law enforcement data service. This … role requires a strong focus on creating scalable front-end solutions while adhering to accessibility standards and best practises. Responsibilities - Lead the development of scalable front-end solutions using React. - Champion best practises in performance, accessibility, and maintainability. - Implement standards aligned with ...

TheOpportunity Wearepartneringwithaninnovativeandfast-growingtechnologybusinesstorecruita SeniorFrontendDeveloper withdeepexpertisein ReactandReactNative . Thisisakeyhirewithintheengineeringteam,suitedtosomeonewhocan takeownershipofcorefrontendareas ,workindependently,andconfidentlydelivercomplexfeaturesfromdevelopmentthroughtorelease. KeyResponsibilities Developandmaintain webapplications(React/Next.js) and mobileapps(ReactNative/Expo) Takeownershipoffeaturesfromconceptthroughto productionrelease(includingAppStoredeployment) Designandimplement robustfrontendarchitectureandintegrationlayers Manageauthenticationflowsusing MSAL Collaboratecloselywithbackendteamsworkingon Node.jsmicroservices Supportdeploymentandconfigurationacrossenvironmentsusing Azure KeyRequirements ...

them into effective outcomes. You understand and align with Solirius Reply Values The Role: We are seeking a skilled and detail-oriented Front-End Developer to join our team. In this role, you will be responsible for building and maintaining user-facing … back-end developers to deliver seamless digital experiences. Key Responsibilities: Develop responsive and user-friendly web interfaces using modern front-end technologies Translate UI/UX designs and wireframes into high-quality code Optimise applications for maximum speed and scalability Ensure cross-browser compatibility ...

TransPerfect is an established company with a start-up culture seeking creative entrepreneurial people like you to join our team. Were hiring a Frontend Engineer to join our global team to be responsible for the ...

Our client, a large enterprise, is seeking a Senior Full- Stack Engineer to join an established trading platform programme. This production- critical system is long- lived, actively evolving, and places strong emphasis on ...

Senior Frontend Developer (Contract) Location: Fully Remote (EU-based candidates considered) Day Rate: £300–£340 per day Contract Type: Outside IR35 Start Date: ASAP uration: 3-6 months Overview We’re supporting a fast-paced digital product company, looking for a Senior Frontend Developer ...

Senior Frontend Developer Up to £80,000 Central London - Flexible Hybrid Options Health-Tech A start-up within the health space are seeking a Senior Frontend Developer to join a high performing squad of engineers building a unique SAAS platform which … company This is an exciting opportunity to work on impactful projects in a forward-thinking environment. If you are passionate about front-end development, we’d love to hear from ...

code development, while also conducting thorough investigations and resolution of bugs Develop modular, reusable code components to streamline development and maintenance Utilize front-end frameworks like Vue.js, or Angular to create scalable and reusable UI components Optimize code and assets to ensure optimal load times ...

collaborative problem solving, sophisticated design, and quality product is important. Responsibilities Developing new user-facing features using React.js Building reusable components and front-end libraries for future use Translating designs and wireframes into high quality code Optimising components for maximum performance across a vast array … RTKQuery also a bonus) Familiarity with RESTful APIs Knowledge of modern authorization mechanisms, such as JSON Web Token Familiarity with modern front-end build pipelines and tools (Github actions a bonus) Experience with common front-end development tools such as Babel, Webpack ...

compliance requirements where applicable. Desired experience: - Proven experience in a senior engineering role with ownership of complex systems. - Strong expertise in front-end technologies (JavaScript/TypeScript frameworks) or another core area such as React - Ability to work beyond a single specialization (T-shaped skillset) — preferred … strictly mandatory. - Experience integrating front-end applications with APIs and backend services. - Solid understanding of distributed systems and cloud environments (AWS preferred). - Familiarity with CI/CD pipelines, automated testing, and modern delivery practices. - Experience with performance optimisation, debugging, and observability tools. - Exposure to legacy ...

Opportunity We are partnering with an innovative and fast-growing technology business to recruit a Senior Frontend Developer with deep expertise in React and React Native . This is a key hire within the engineering team, suited to someone who can take ownership of core frontend ...

Opportunity We are partnering with an innovative and fast-growing technology business to recruit a Senior Frontend Developer with deep expertise in React and React Native. This is a key hire within the engineering team, suited to someone who can take ownership of core frontend areas ...

Frontend Developer Day Rate: £450 Outside IR35 Duration: 6-months Start Date: ASAP Are you actively looking for you next contract opportunity? We're working with a Data Technology Business who are looking for additional support within their Engineering teams. They have a high volume … work through one of their biggest customers so the demand is high and the support is needed asap. The Frontend Developer will be needed for supporting on all frontend projects - you'll be working with new and existing customers. Typical frontend stack with React and Typescript. ...

Role: React Front End Developer Type: Contracts (8 Months) Location: London, UK Working Model: Fully Onsite Initially (5 Days in Office) The Must-Haves: Advanced proficiency in React.js . Ability to act as a subject matter expert, manage the team to perform ...

London. This is a high-impact role, working directly with Portfolio Managers, Quants, and Traders to design and deliver cutting-edge front-end systems that power real-time investment decisions. You’ll be building intuitive, high-performance UIs in React/TypeScript, with a strong focus … data-rich visualisations that bring complex trading strategies and risk models to life. This role offers true ownership of front-end design and delivery, with the opportunity to influence both technology and business decisions at the core of the fund’s operations. What ...