Julio De La Calle Palanques
Director Of Technology at Holded
Barcelona, Catalonia, Spain
Summary
👤
Senior🎓
Top SchoolJulio De La Calle Palanques is a seasoned technology leader with 12 years of experience and over 8 years managing and scaling engineering teams, currently serving as Director of Technology at Holded in Barcelona. He combines hands-on engineering roots in front-end development and systems administration with strategic leadership across backend, DevOps, and product-aligned roadmaps. Julio has led teams of 6–8+ engineers on mission-critical services for live games like Monster Legends, owning uptime, legacy maintainability, and architectural modernization. His stack experience spans Golang, PHP, Node.js, TypeScript, Kubernetes, AWS services and observability tooling, enabling reliable, scalable systems in high-availability contexts. An active contributor to front-end open source (notably improving the jQuery Custombox modal project with responsive and UX fixes), he brings practical contributions alongside hiring and process leadership. Known for turning complex legacy codebases into maintainable platforms, he pairs technical depth with a product-first mindset.
12 years of coding experience
16 years of employment as a software developer
Técnico en Explotación de Sistemas Informáticos. Administración de sistemas informáticos en red, Técnico en Explotación de Sistemas Informáticos. Administración de sistemas informáticos en red at I.E.S Mare de Déu de la Mercé
Spanish, Catalan, English
Stackoverflow
36reputation
5kreached
2answers
0questions
Github Skills (10)
css10
javascript10
jquery10
bootstrap9
bootstra9
responsive-design9
html6
ajax6
modal-dialog6
meteor6
Programming languages (5)
Github contributions (5)
dixso/custombox
Oct 2013 - Jun 2017
Modal window effects with transitions CSS3.
Role in this project:
Front-end Developer
Front-end DeveloperContributions:16 releases, 215 commits, 47 PRs in 3 years 8 months
Contributions summary:Julio primarily contributed to the jQuery Custombox project by implementing features and fixing bugs related to the modal window effects. Their commits included improvements to the visual presentation of the demo page with Bootstrap and updates to the download links. Furthermore, the user addressed specific issues related to responsive design and functionality within the core CSS and JavaScript files.
modal-windows
holdedhub/careers
Feb 2022 - Oct 2022
Holded engineering careers info, coding challenges, and anything else we are open to sharing with the world.
Contributions:6 reviews, 6 commits, 11 PRs in 8 months
engineeringholdedsharingelse
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