Sergio Mondaray
Jefe Técnico at Twenix
Madrid, Community of Madrid, Spain
Summary
👤
Senior🎓
Top SchoolSergio Mondaray is a seasoned back-end developer and entrepreneur with 13 years of experience building scalable web services and APIs from Madrid. He combines hands-on engineering with product instincts demonstrated by co-founding TuCertificadoDigital.com to simplify digital certificate access during the pandemic and leading technical efforts at Tramitado.es. At mediasmart he progressed from full-stack developer to frontend & API team leader, designing microservice-driven systems for campaign management and analytics. Comfortable across the stack, he is highly self-taught, curious, and continuously upskills (including game dev with Unity/C#). Known for initiative and building solutions from scratch, he blends research experience in information retrieval with pragmatic delivery in startups and scale-oriented teams.
13 years of coding experience
9 years of employment as a software developer
Ingeniero en Informática, Tecnologías de la Información, Ingeniero en Informática, Tecnologías de la Información at Universidad de Castilla-La ManchaMaster en desarrollo de videojuegos con Unity3D y C#, Computer Games and Programming Skills, Master en desarrollo de videojuegos con Unity3D y C#, Computer Games and Programming Skills at Udemy Alumni
Spanish, English
Stackoverflow
2,635reputation
1.9mreached
32answers
18questions
javascript
top-5%
command-line-arguments
top-5%
Github Skills (70)
windows10
javascript10
linux10
browser10
js10
macos10
nodejs10
nextjs10
react10
tree-sitter9
code-editor9
compiler9
hybrid9
multiplayer9
npm9
Programming languages (8)
Github contributions (5)
sgmonda/stdio
Mar 2013 - Dec 2020
The de facto standard input/output manager for Node.js
Contributions:1 release, 226 commits, 6 PRs in 7 years 10 months
nodejs
sgmonda/streamfu
Nov 2024 - May 2026
Functional stream utilities for JavaScript & TypeScript
Contributions:2 reviews, 2 PRs, 67 pushes in 1 year 6 months
javascripttypescriptdenonodejspipeline
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