Senior Frontend Developer
London, UK | ramon.polidura.rueda@gmail.com
Senior Frontend Developer with 16+ years of experience building scalable web and mobile applications using TypeScript, React, and React Native. Experienced leading frontend teams, architecting complex UI systems, and delivering high-impact SaaS products across e-commerce, healthtech, and enterprise platforms.
Passion.io, London | Senior Fullstack Developer | August 2025 – April 2026
- Built a cross-platform mobile app builder using React Native, enabling 10k+ creators to reach millions of users.
- Developed an AI-powered onboarding flow using LLM APIs, reducing setup time and increasing activation and subscriptions, including a feature for creators to generate a voice-based “you-AI” avatar from uploaded content.
Collekt.ai, London | Lead Frontend Developer | October 2024 – May 2025
- Led a team of 3 engineers to deliver an automated agent calling interface, increasing collections by 20%.
- Streamlined a campaign management tool, enabling managers to optimise customer engagement through an intuitive, high-performance UI, while improving delivery through end-to-end ownership and increased test coverage.
Silicon Rhino, London | Senior Fullstack Developer | July 2020 – September 2024
Kick started several successful startups into the market by creating their websites using React.js, Next.js and Node.js, with excellent user satisfaction and results.
Delivered scalable platforms across e-commerce, investment, and healthcare, supporting thousands of users through modern engineering practices and continuous delivery.
Heydoc, London | Fullstack Developer | October 2018 – June 2020
Built a React-based clinic management platform used by thousands of doctors across the UK, improving patient communication and reducing administrative friction through a fast, intuitive, and well-tested interface.
AND Digital, London | Fullstack Developer | June 2017 – August 2018
Delivered web projects for clients including TalkTalk and House of Fraser, building landing pages and e-commerce experiences while collaborating with internal teams to improve delivery processes.
Zappi, London | Frontend Developer | May 2017 – November 2017
Led frontend development for core product features, delivering a fast, intuitive interface that improved user satisfaction and increased revenue, using React and Angular with strong test coverage.
Playtech, London | Frontend Developer | November 2013 – November 2015
Developed JavaScript UI components for online casino and gaming platforms, delivering interactive gambling experiences including slots, bingo, and game animations
Gimo Global Interactive Marketing Online, London | JavaScript Developer | September 2012 – November 2013
Developed user-facing JavaScript features for large-scale online betting platforms, supporting sports betting, slot games, and third-party gaming integrations.
TN Solutions, London | JavaScript Developer | December 2011 – November 2012
Designed websites for small business including a complete CMS in Joomla with online bookings, invoicing, online orderings, receipts, reports and e-commerce.