Everything we've shipped
Each entry is a written account of what was built, what it ran on, and what happened next.
Rovak Solutions is led by Roy van Kaathoven. These are the systems he has built and led, at his own companies and for clients, going back to 2009.
Client work
Built for other companies, including ones Roy co-founded or led engineering at.
Live-streaming platform
CTO · 2019–2025
Grew from a 2019 prototype into a global platform and a company of around fifty, and was acquired by an international group in 2024.
Wellness platform for creators
AI-first · Creator platform
A creator platform with four revenue streams is live, built in a few months by a handful of people working AI-first instead of several teams.
Online gaming platform
Nightpixel · Lead engineer · Game & payment integration
Went live with 50+ games from outside studios, playable on one platform against a single token wallet.
Sakurai
Nest.js · Slack · MCP
Replaced three to five disconnected AI chat tools with one Slack assistant that acts on the company's own systems, through 15+ focused agents.
Document output platform
ERP software vendor · C# · .NET
Replaced a resold engine with an in-house one, ending the revenue share with the original vendor, and became a lower-cost alternative to the output stacks sold by Microsoft, SAP, Oracle and HP.
Autarco Helios
Autarco · React · TypeScript
Turned a slow, expert-led solar calculation into something a dealer or customer does themselves in a few minutes, in the browser.
Our own products
Products the studio builds and runs itself, on the same method and stack it uses for clients.
Decentralized wallet
Author · TypeScript · Web3
Over a million wallets created by community members, across four blockchains, without anyone leaving their Telegram group.
Companion AI
Solo full-stack & AI · Cloudflare edge · 2026
Four live branded sites from one backend, built solo in about four months and maintained by one person.
Social publishing platform
Socialog · Founder & full-stack engineer · Cloudflare edge · 2026
A seven-network publishing product with exactly-once delivery and an agent API, built and operated by one person on a single Worker.
Bikkel
Bikkel · Founder & full-stack · Strength-training tracker on Cloudflare
A complete consumer app with two clients, billing and an AI-ready MCP server, built and operated by one person as a single deploy.
MandarinAI
MandarinAI · Solo founder · AI-assisted Chinese learning
An AI product where generation is reliable, capped and cached, built and operated end to end by one person on a single Worker.
Tell us the one thing it has to do.
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