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Hi, I’m Rishabh Kumar, a senior frontend engineer based in London, specializing in building fast, accessible, and maintainable web applications using React, Vue, Angular, and Solid.js. I’ve led major upgrades, modernized monorepos, and delivered production-ready UI across fintech, e-commerce, and media domains. I enjoy turning complex requirements into intuitive interfaces, mentoring teammates, and driving architecture decisions to improve performance, scalability, and developer experience. I’m open to opportunities in London or remote roles.…Hi, I’m Rishabh Kumar, a senior frontend engineer based in London, specializing in building fast, accessible, and maintainable web applications using React, Vue, Angular, and Solid.js. I’ve led major upgrades, modernized monorepos, and delivered production-ready UI across fintech, e-commerce, and media domains. I enjoy turning complex requirements into intuitive interfaces, mentoring teammates, and driving architecture decisions to improve performance, scalability, and developer experience. I’m open to opportunities in London or remote roles.

Rishabh Kumar

Front-End Developer, Web Developer, Full Stack Developer, +3

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Hi, I’m Rishabh Kumar, a senior frontend engineer based in London, specializing in building fast, accessible, and maintainable web applications using React, Vue, Angular, and Solid.js. I’ve led major upgrades, modernized monorepos, and delivered production-ready UI across fintech, e-commerce, and media domains. I enjoy turning complex requirements into intuitive interfaces, mentoring teammates, and driving architecture decisions to improve performance, scalability, and developer experience. I’m open to opportunities in London or remote roles.…Hi, I’m Rishabh Kumar, a senior frontend engineer based in London, specializing in building fast, accessible, and maintainable web applications using React, Vue, Angular, and Solid.js. I’ve led major upgrades, modernized monorepos, and delivered production-ready UI across fintech, e-commerce, and media domains. I enjoy turning complex requirements into intuitive interfaces, mentoring teammates, and driving architecture decisions to improve performance, scalability, and developer experience. I’m open to opportunities in London or remote roles.

Available to hire

Hi, I’m Rishabh Kumar, a senior frontend engineer based in London, specializing in building fast, accessible, and maintainable web applications using React, Vue, Angular, and Solid.js. I’ve led major upgrades, modernized monorepos, and delivered production-ready UI across fintech, e-commerce, and media domains.

I enjoy turning complex requirements into intuitive interfaces, mentoring teammates, and driving architecture decisions to improve performance, scalability, and developer experience. I’m open to opportunities in London or remote roles.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Tech Lead at Onyx Capital Group

August 1, 2020 - November 19, 2025

Led frontend architecture with React.js and Solid.js; built SPAs, migrated Ember to Solid; delivered dashboards and data visualizations; implemented SSR with Next.js; containerized services on AKS; integrated with Web3 and AI initiatives; contributed to open-source Solid.js projects.

Tech Lead at Onyx Capital Group

August 1, 2020 - Present

Senior frontend Tech Lead responsible for architecture and delivery of high-impact UI projects. Led development of SPAs using React, React Hooks, Redux, and Solid.js; implemented server-side rendering with Next.js and data visualizations with D3.js/Charts.js. Modernized legacy monorepos (Lerna/Yarn Workspaces), upgraded Node.js to v20+, and built containerized services with AKS and AWS/Azure, ensuring maintainability and performance. Collaborated with backend, product, and design to ensure scalable, accessible interfaces, and mentored team members on best practices and modern frontend paradigms. Also integrated blockchain data via Web3.js and deployed smart contracts on Ethereum.

Senior Frontend Engineer at Debenhams

June 1, 2020 - June 1, 2020

Designed and developed web applications, implemented OAuth2 with Keycloak; worked on AngularJS, React and Redux; REST integrations; migrated UI patterns; customized Shopify themes; containers and microservices; data visualization with D3.js.

Frontend Engineer at Debenhams

June 1, 2020 - October 2, 2025

Designed and developed web-based applications focusing on performance, accessibility, and cross-browser compatibility. Worked on post-upgrade performance/stability reporting, integrated Keycloak (OAuth2) for secure authentication, and led migration/upgrades (Vue2→Vue3, Vuex→Pinia, Tailwind). Built CI/CD with AWS Amplify and improved overall UX for multiple brands.

Frontend Engineer at Cognizant

February 1, 2018 - February 1, 2018

Led frontend development using AngularJS, React, and Vue; implemented responsive designs and performance optimizations; integrated with REST services and caching; advanced testing and code quality initiatives.

Frontend Engineer at Cognizant

February 1, 2018 - October 2, 2025

Developed frontend solutions using AngularJS/Angular2+, React, and RESTful services. Implemented automated tests and contributed to performance improvements. Participated in migration plans toward modern frameworks and scalable architectures.

Frontend Developer at Wipro Digital

September 1, 2016 - September 1, 2016

Developed frontend pages with React and Vue; built reusable components; integrated with REST APIs; improved accessibility; contributed to modernization efforts and supported Shopify integrations for e-commerce platforms.

Frontend Developer at Wipro Digital

September 1, 2016 - October 2, 2025

Developed rich client-side modules using JavaScript, TypeScript, HTML5, and CSS3/JQuery; contributed to localization and responsive design efforts; integrated with content management and e-commerce workflows; supported cross-functional delivery.

Frontend Developer at Goldman Sachs

December 1, 2014 - December 1, 2014

Implemented UI using HTML5, CSS3 and jQuery; built SPAs with Spine MVC; leveraged AJAX for dynamic interactions; ensured cross-browser compatibility and collaborated with offshore teams to deliver reusable frontend components.

Frontend Developer at Goldman Sachs

December 1, 2014 - October 2, 2025

Developed UI components and apps using HTML5/CSS3, jQuery, AngularJS. Implemented SPA patterns, AJAX, and cross-browser compatibility. Contributed to Spine MVC-based architecture and modular frontend development.

Frontend Developer at Tata Consultancy Services

June 1, 2011 - June 1, 2011

Developed frontend UI with HTML, CSS and JavaScript, focusing on performance, accessibility, and SEO. Built cross-browser compatible pages, implemented templates with Smarty, and integrated with backend services to deliver responsive user interfaces.

Frontend Developer at Tata Consultancy Services

June 1, 2011 - October 2, 2025

Created responsive, accessible web interfaces using HTML, CSS, JavaScript; contributed to CSS/SASS-based styling; implemented cross-browser compatibility and SEO enhancements.