Sebastiaan Van Vlaanderen
CTO at Wahooh Media
Amsterdam, North Holland, Netherlands
Summary
👤
Senior🎓
Top SchoolSebastiaan Van Vlaanderen is a pragmatic CTO and full-stack product engineer with over 17 years of hands-on experience building scalable SaaS and tailor-made e-commerce and mobile applications from Amsterdam. As co-founder and head of development at Webbers Agency and technology lead at Wahooh Media, he blends strategic leadership with day-to-day engineering, driving roadmaps, team growth, and performance optimizations. He specializes in TypeScript, Postgres, Redis and modern stacks like React/Next.js, NestJS, Strapi and MedusaJS, and has applied similar skills in PHP/Laravel and PostGIS projects. An active contributor to the Medusa e-commerce platform, he’s fixed scheduler and discount tax bugs, improved fulfillment typing, and swapped Redis clients to strengthen core backend reliability. Colleagues rely on him to translate complex product requirements into maintainable systems and measurable performance gains. He holds a BSc in Computer Science from Universiteit Utrecht and brings a practical, infrastructure-minded perspective informed by long-term product delivery.
9 years of coding experience
Bachelor of Science (BSc), Computer Science, Bachelor of Science (BSc), Computer Science at Universiteit UtrechtVWO, Natuur en techniek, VWO, Natuur en techniek at Het Nieuwe Eemland
Dutch, English
Stackoverflow
11reputation
116reached
0answers
1question
Github Skills (14)
typescript10
nodejs10
typescripts10
back-end-development10
redis10
typescript-types10
ecommerce10
apidoc9
javascript9
api9
application-framework9
app-framework9
web-framework9
php6
Programming languages (6)
Github contributions (5)
medusajs/medusa
Mar 2022 - Jul 2024
The world's most flexible commerce platform.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1 review, 15 PRs, 41 comments in 2 years 4 months
Contributions summary:Sebastiaan primarily focused on improving the Medusa e-commerce platform's backend functionality. Their contributions involved fixing bugs in the job scheduler service, resolving issues with discount calculations in the presence of taxes, and correcting typing issues within fulfillment services. Furthermore, the user implemented features to expose item and shipping tax totals in the order and replaced Node Redis with ioredis, indicating significant involvement in the core application logic and infrastructure. Finally, the user fixed a missing product category relation in the product search subscriber and addressed a bug related to deleted discounts.
shopifycartmedusareactecommerce
pepijn-vanvlaanderen/trellis-laravel
Aug 2019 - Aug 2019
Ansible playbooks for a WordPress LEMP stack
Contributions:14 commits, 12 pushes, 15 branches in 5 days
vagrantsagewordpressansibletrellis
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