David Grelaud
Founder at CarboneIO
Mouilleron-le-Captif, Pays de la Loire, France
Summary
🤩
Rockstar🎓
Top SchoolDavid Grelaud is a founder and maker with 13+ years building full-stack systems and products from idea to scale, combining deep hands-on expertise in Node.js/PostgreSQL production deployments with practical hardware and manufacturing skills. He co-founded Ideolys and leads CarboneIO, the creator of carbone, a fast report generator used to convert JSON to PDFs and other formats, reflecting his knack for small, performant solutions that solve real-world needs. Comfortable across cloud, embedded, robotics and CAD-driven mechanics, he excels at simplifying complexity—often fixing problems with a few lines of dependency-free code. A long-term thinker and generous teammate, he balances relentless execution with empathy and a low-opinion-of-self attitude, preferring to prove value through outcomes rather than meetings. Based in Pays de la Loire, France, he also invests in and advises startups, applying cross-disciplinary insights to optimize productivity and product durability for future generations.
13 years of coding experience
14 years of employment as a software developer
Master of Sciences in Engineering (Diplôme d'ingénieur) Electronics computer science and embedded systems, Master of Sciences in Engineering (Diplôme d'ingénieur) Electronics computer science and embedded systems at Eseo
Stackoverflow
1reputation
0reached
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Github Skills (7)
xml10
report-builder10
nodejs10
javascript10
report-generator10
template-engine9
code-optimization8
Programming languages (8)
Github contributions (5)
carboneio/carbone
Mar 2017 - Nov 2022
Fast and simple report generator, from JSON to pdf, xslx, docx, odt...
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 181 commits, 12 PRs in 5 years 8 months
Contributions summary:David contributed to the core functionality of the report generator, implementing and refining features related to XML building and processing. They focused on the `builder.js` module, implementing functions to handle formatting, filtering, and assembling XML parts. The user's work also included addressing bugs related to Unicode handling and resolving issues with nested array structures within the XML generation process. Furthermore, the user enhanced the code to incorporate new formatters and optimize the performance of the sorting algorithm.
docxmicrosoft-officepdf-generationpdfjavascript
Ideolys/kitten-jwt
Dec 2018 - Jan 2023
Keep It Simple, Stupid & Fast Asymmetric JWT. Generates ECDH keys, sign and verify
Contributions:23 commits, 2 PRs, 17 pushes in 4 years 1 month
keepsignecdhkeysverify
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