About
I'm a CTO who still writes code every day. At EXTRA, the agency I co-founded, I built the engineering team from scratch and we delivered products for clients like Hyperice, Rheinmetall, and Apillon. I handle architecture decisions in the morning and debug production issues in the afternoon.
My stack is mostly TypeScript end-to-end. NestJS and PostgreSQL on the backend, React or Next.js on the frontend, React Native or Flutter when it needs to run on a phone. I've also worked with Angular, Django, C++, and whatever the project actually needed.
The work below ranges from autonomous medical robots to defense product configurators to crypto exchanges. I tend to end up on projects where the domain is complex and the stakes are real.
Selected Work
Hyperice
hyperice.comBackend for HyperSmart, the connected recovery platform behind Hyperice's smart devices. Health integrations, real-time device data, high concurrency.
Apillon
apillon.ioWeb3 developer platform on Polkadot. Built deployment pipelines, NFT campaign tools, and RPC-as-a-Service.
Ropca
ropca.comSoftware for the world's first AI-powered autonomous ultrasound robot for arthritis diagnosis. Robotics meets healthcare.
Naval Architect
naval-architect.ioDigital-twin platform for ship design and marine engineering. 3D modeling, vessel data management, multi-tool syncing.
SeaVizor
seavizor.deShipbuilding project management platform. Real-time progress tracking from jobsites, mobile app for on-site workers, web control center for coordinators.
Blissbook
blissbook.comEmployee handbook SaaS with real-time collaborative editing, SSO, PDF generation, and enterprise compliance.
Bo
bomind.siMental health app where users do guided exercises and have live therapy sessions with their therapists.
EXTRA
extra.devCompany website and recruitment platform for our software agency. Case studies, blog, job application system with Notion ATS.
FreedomChat
freedomchat.appReal-time chat platform with WebSockets, push notifications, in-app purchases, and media storage.
Jonatan Mars
jonatanmars.comInvestment management mobile app with KYC, document signing, portfolio tracking, and multi-platform deployment.
Megabon
megabon.siTravel and leisure deals platform. Next.js frontend for browsing and purchasing discounted travel experiences.
Mountain Green
MLM platform for a hemp products company. Multi-tier commissions, real-time earnings, distributor dashboards.
Olimpija Ljubljana
nkolimpija.comOfficial website for Slovenia's biggest football club. WordPress with API integrations for match data and stats.
Woofin
Mobile app with a modern Turborepo monorepo setup. Expo + NestJS with shared types and tooling.
Simplisan
infincube.comCloud software for German medical supply stores. Complex pricing, insurance integration, inventory management.
Floin
floin.comRegulated cryptocurrency trading platform based in Liechtenstein. Buy, sell, and manage digital assets with full compliance.
IMT Analytics
imtanalytics.comFlutter companion app for medical flow testing devices. Bluetooth connectivity, real-time data, 7 device models.
Rheinmetall
rheinmetall.comProduct configuration manager for defense products. Dynamic property systems, variant management, role-based access, and full audit trails.
Contact
Let's work together
Have a project in mind, want to hire me, or just want to say hi? I'm always open to interesting conversations.