Ramón Polidura Rueda

London, UK

Senior Frontend Engineer 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.

GitHub

Tech Stack

Languages:
HTML5HTML
CSSCSS
JavaScriptJavaScript
TypeScriptTypeScript
Frameworks:
ReactReact.js
RemixRemix
Next.jsNext.js
ExpoExpo.io
Testing:
Testing LibraryReact testing library
JestJest
CypressCypress
StorybookStorybook
Tools:
CursorCursor IDE
JiraJira
GitHubGitHub
FigmaFigma

Experience

Passion.io, London | Senior JavaScript Engineer | August 2025 – April 2026

  • Developed a cross-platform mobile UI using React Native and TypeScript, supporting 10k+ creators and millions of users, enabling scalable feature development and consistent user experience across platforms.
  • Engineered an AI-powered onboarding workflow using LLM APIs, personalising the first-time user experience and improving user activation and onboarding efficiency.
  • Designed and implemented a scalable React Native component architecture, improving maintainability and accelerating feature development across the mobile codebase.
React NativeTypeScriptExpo.ioGraphQLJest

Collekt.ai, London | Lead Front-end Developer | October 2024 – May 2025

  • Led a team of 3 front-end developers, managing hiring, sprint delivery, and technical direction, enabling rapid feature delivery and consistent release cycles.
  • Designed and implemented an AI-powered chat interface using React, Remix, and LLM APIs, enabling agents to automate customer interactions and improve operational efficiency.
  • Delivered and scaled three React and Remix applications serving hundreds of thousands of users, refactoring a legacy codebase to improve performance by 40% and enhance user experience.
React.jsTailwindTypeScriptRemix