Open to new opportunities · Kraków / remote
Full-Stack Developer · Cloud to silicon
I build the whole stack — from cloud to circuit board.
I'm Jerzy Wilczyński, a full-stack .NET developer and DevOps developer with 5+ years of commercial experience. I design and ship production web systems end to end — .NET, Angular, MSSQL, Azure and CI/CD — and modernise legacy monoliths without freezing the business. Beyond the browser I design my own PCBs, write ESP32-S3 firmware, run a self-hosted high-availability cluster, and build AI/LLM tooling.
Profile
A rare full-vertical developer
Most developers pick a lane. I work across the entire vertical: from Azure, microservices and high-availability infrastructure, through .NET back ends and Angular front ends, all the way down to custom PCBs and ESP32-S3 firmware.
Commercially I build and modernise production systems for the public, legal, telematics and HR sectors — legacy migrations, REST APIs, CI/CD and security hardening. Independently I design end-to-end products: self-hosted high-availability infrastructure, real-time hardware control, and AI/LLM tooling built on agentic loops, the Model Context Protocol and custom ML.NET models.
Capability map
The stack, layer by layer
One developer across every layer — from cloud infrastructure down to the circuit board.
Commercial experience
Production systems I've shipped
Selected commercial work — framed around outcomes: modernisation, scale and delivery. Tap any entry for detail.
Independent developering & R&D
Things I've built myself
Self-initiated products and research — designed, built and implemented end to end, hardware and software.
Web design
Selected web work
A few responsive front ends — from clean landing pages to corporate and technical platforms.
Preview
Contact
Let's build something
Hiring, contracting, or need someone who can own a system from the database to the device? I'd be glad to talk.