We build software that solves real problems.
Software products and expert consulting from a team that ships reliable systems. We build tools we believe in — and help others do the same.
Products
MijnWebwinkel Migration Tool
Migrate your webshop from MijnWebwinkel to Shopify — products, categories, translations, images, and SEO redirects. Fully automated.
Learn more →Massapp
Bulk WhatsApp messaging for businesses. Reach your customers at scale through the official WhatsApp Business API.
Rebuilding on official API. Contact us for early access.
IoT & Sensor Solutions
Custom software for sensor data collection, monitoring, and dashboards. We have deep experience with IoT systems — from firmware to cloud.
Looking for partners with domain expertise.
Expert Consulting
We also take on consulting engagements where our expertise makes a difference. 10+ years building production systems — we make technical decisions and then build them.
Built the core platform for a reinsurance technology startup — from early architecture to handling live deals in production. Read about solving a production issue →
Technical lead for a construction IoT startup. Architecture decisions that scaled from pilot to production. 7x device performance improvement. Read the full story → · The 7x improvement →
Automated e-commerce migration for a multi-language webshop with 2,400+ products across three domains and three languages.
About
I’m Jappie Klooster. I build software products and help companies that need serious technical expertise. I use technologies chosen for reliability — Haskell, Nix, and whatever else gets the job done right.
Based in the Netherlands. Available for product partnerships, consulting engagements, and co-founder conversations.
For more writing and case studies, visit the blog.
Have a problem that needs solving?
Whether you need a product, a technical partner, or expert consulting — get in touch.
Get in touch