~/engineering
Senior software engineering with a pure startup mindset
Focused on web apps, pragmatic automations beyond n8n, and rapid prototyping — with an AI-first approach and twenty years of practice.
01 / stack
Preferred Tech stack
Backend
- Node.js
- Python
Frontend
- Vue.js
- Tailwind CSS
Data
- MySQL
- PostgreSQL
Infrastructure
- From bare metal to cloud-native
02 / how i work
Principles over buzzwords
AI-first approach
AI is part of my engineering workflow from architecture to review — used deliberately, with the experience to know when not to trust it.
Product-oriented mindset
I ask the right questions upfront. Code only matters if it moves the product and the business.
Continuous improvement
I improve legacy code while shipping new features — leaving every codebase better than I found it.
03 / proof
Things I had impact on
laserhub.com ↗
The procurement platform for custom metal parts I co-founded and built up as CTO.
ambrosius.ai ↗
An AI-driven product I build and run myself as a side hustle.
rhome.world ↗
The global mobility platform for workations, business travel and assignments — compliant & simple. I work on it as a Senior Full Stack Engineer.
tally-js ↗
A type-safe, developer-friendly TypeScript wrapper for the Tally.so API, published as an open-source npm package.
04 / scaling up
Larger software projects
When a project outgrows a single pair of hands, I don’t pretend otherwise. For larger software projects I collaborate with a Polish/Ukrainian software partner — a trusted partnership of almost ten years.
Highly skilled engineers with great collaboration and communication skills, and me as your single point of contact who speaks both tech and business.
05 / references
What others say
“As an engineering leader, Jonas drove initiatives that kept us reaching for smarter, state-of-the-art and long-lasting solutions. He was a fountain of ideas that kept things fresh and exciting — and always had an open ear, challenging input with the right questions to draw out even better ideas.”
Got something to build?
Tell me what you’re working on and I’ll tell you honestly whether I’m the right person for it.