Mario Ballestero
Lead Frontend Developer at Z1
Seville, Andalusia, Spain
Summary
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RockstarMario Ballestero is a software engineer based in Seville with six years of experience crafting user-focused web applications, primarily in frontend technologies like React, Next.js and TypeScript. He has led frontend teams at Z1, making architectural decisions, mentoring developers, and improving CI/CD and performance while also stepping into backend tasks when needed. As a co-founder of WePlan he combined product ownership, UX iteration and scalability thinking with hands-on development, showing he operates beyond pure engineering. Mario thrives at the intersection of design, tech and user needs, favoring clear processes and deliberate, well-crafted interactions that drive real impact. He brings a curious, detail-oriented mindset and a habit of getting involved in the reasoning behind decisions, not just the code.
6 years of coding experience
3 years of employment as a software developer
Github Skills (56)
calendar-widget10
del10
react-component10
api10
rest10
datepicker10
mysql9
themoviedb-api9
react-bootstrap9
cms9
javascript9
dashboard9
typescript9
content-management9
nodejs9
Programming languages (5)
Github contributions (5)
mariobalrod/pokedex
Jul 2020 - Nov 2022
Contributions:1 PR, 22 pushes, 7 branches in 2 years 4 months
pokeapicssreact-hookspokedexreactjs
mariobalrod/grupo-2-entorno-servidor
Oct 2020 - Mar 2021
Contributions:25 reviews, 146 commits, 77 PRs in 4 months
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