Matthieu Sieben

Watermael-Boitsfort - Watermaal-Bosvoorde, Belgium

Join Prog.AI to see contacts

Summary

🤩

Rockstar

🎓

Top School

Matthieu Sieben is a TypeScript-focused full-stack engineer and former founder/CTO with 11 years of experience building and scaling SaaS products. He led architecture transformations and team growth as Head of Engineering at Sortlist and designed a no-code JSON-based templating language as CTO of Penbox. Now working as a freelance consultant, he helps teams modernize stacks, improve release practices, and streamline development pipelines. Matthieu is an active open-source contributor, improving UI components in Vuetify and hardening back-end integrations such as hapi-swagger and Bluesky’s atproto. His background spans low-level ops to product design, so he blends pragmatic engineering with a product-first mindset. Based in Brussels, he brings both leadership experience and hands-on coding to short- and long-term engagements.

11 years of coding experience

9 years of employment as a software developer

Civil engineer in informatics specialized in software engineering, informatics, electronics, Civil engineer in informatics specialized in software engineering, informatics, electronics at Université catholique de Louvain

Higher Secondary Certificate, math 6h, science 6h, Higher Secondary Certificate, math 6h, science 6h at Institut Saint-Albert

Dutch, English, French

Stackoverflow

Stats

1reputation

0reached

0answers

0questions

Github Skills (24)

authorizations10

javascript10

back-end-development10

ui-components10

hapi10

user-authentication10

typescript10

authentication10

swagger10

performance-optimization10

vuetify10

typescript-types10

authorization10

typescripts10

Programming languages (16)

MDXRustMakefileVueGoPerlHTMLTypeScript

Github contributions (5)

bluesky-social/atproto

Oct 2023 - Apr 2025

Social networking technology created by Bluesky

Role in this project:

Back-end Developer

Contributions:234 reviews, 238 PRs, 1117 pushes in 1 year 6 months

Contributions summary:Matthieu primarily focused on optimizing the authentication and authorization components within the system. They addressed performance bottlenecks in the authentication process by avoiding unnecessary recreation of authorization functions and utilities. Furthermore, the user contributed to general server improvements by refactoring code, addressing issues, and ensuring the correct application of rate limits. They also updated the build system and updated dependencies.

social-networknetworkingsocial-networkingbluesky

vuetifyjs/vuetify

Oct 2019 - Sep 2021

🐉 Vue Component Framework

Role in this project:

Front-end Developer

Contributions:7 commits, 17 PRs, 39 comments in 1 year 10 months

Contributions summary:Matthieu primarily contributed to fixing and improving Vuetify component functionality. Their work included addressing bugs in VFileInput, VMain, VProgressCircular, VTextField, and VAutocomplete components. They also added features like backwards compatibility to `v-content` and improved component behavior, fixing transition triggers. Their contributions demonstrate a focus on UI component development and maintenance within the Vuetify framework.

neumorphismagnosticvuetifyjsvueui-components

Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.

Request Free Trial