Mario Beltrán
Staff Web Engineer at Spoke
Madrid, Community of Madrid, Spain
Summary
🤩
Rockstar🎓
Top SchoolMario Beltrán is a Staff Web Engineer based in Madrid with 10 years of experience building front-end-first web applications and shipping reliable JavaScript solutions. He progressed through roles from back-end and full-stack work at Ebury to leading frontend teams at Whalar and senior/staff engineering positions at Hotjar, and now Spoke, showing strong delivery and people leadership. Deeply practical with React and hooks, he contributes tests and improvements to the popular react-use library, demonstrating a focus on code quality and maintainability beyond feature work. Comfortable across the stack, his early Python/Django background and teaching experience give him an unusually broad perspective for a front-end lead. Colleagues rely on him to turn complex UI requirements into robust, test-covered implementations that scale.
10 years of coding experience
9 years of employment as a software developer
Bachelor of Engineering (B.E.) Technical Engineer in Computer Systems, Bachelor of Engineering (B.E.) Technical Engineer in Computer Systems at Universidad de Málaga
Spanish, English
Stackoverflow
581reputation
48kreached
8answers
0questions
Github Skills (13)
unit-testing10
testing-library10
typescript10
typescripts10
react-hooks10
react10
typescript-types10
javascript9
react-props6
package-json6
eslint6
jestjs6
eslintrc6
Programming languages (8)
Github contributions (5)
streamich/react-use
Jul 2019 - Aug 2019
React Hooks — 👍
Role in this project:
Front-end Developer
Front-end DeveloperContributions:1 review, 42 commits, 10 PRs in 1 month
Contributions summary:Mario primarily focused on testing and updating React components within the `react-use` library. Their commits demonstrate work on test files for various custom React hooks like `useToggle`, `useAsync`, `useWindowSize`, `useBoolean`, and `useCounter`. They also updated dependencies, fixed test structures, and added tests for new hooks like `useBoolean`, streamlining and improving test coverage for the library.
react-hooks
Belco90/react-advanced-patterns-components
Apr 2018 - Jan 2023
Iterating through component with advanced React patterns
Contributions:6 reviews, 116 commits, 58 PRs in 4 years 10 months
reactjavascriptfrontendreact-context
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