berk
Berk de Rooij / Amsterdam
Hi, I'm Berk.
I write code
and build things.
Cybersecurity student at Inholland. I write software and work on electronics with PolderLabs.
Projects
02 / Work
Selected projects
Flipper Zero boards
Custom add-on boards for the Flipper Zero.
Electronics / PCB designdexyd
A phone interface for coding agents. Check sessions, review changes, and respond to approvals away from the terminal.
TypeScript / Mobile / Developer toolsTimeTone
An ESP32 time clock with a touchscreen and a self-hosted dashboard. It keeps working offline.
ESP32 / LVGL / Next.jsopenwolf
My fork of a project-memory tool for Claude Code, Codex, and OpenCode. Keeps context on your own machine.
TypeScript / Local-first / Forkppexchanger
Encrypted messaging between terminals on the same network, written in Rust.
Rust / Peer-to-peer / LANCaddyUI
A web interface for managing Caddy reverse proxies, certificates, and logs.
JavaScript / Caddy / Self-hosting03 / About
A bit about me
I spend most days moving between code, a terminal, and a workbench. I like seeing an idea work in the real world, not only in a browser.
Cybersecurity keeps me interested because it makes me look underneath the surface. I want to know how systems fail, what devices are saying to each other, and where a small detail can change the result.
I tinker with electronics, ESP32 boards, and small circuits. FPV drones are a fun mix of software, wiring, radio, and balance. I get a similar kind of focus from riding motorcycles.
I build agentic tools too. I care about how coding agents keep track of work, and how they can fit into a real development process without getting in the way.
A personal note
ADHD is part of it, too.
ADHD gives me curiosity and enthusiasm for new ideas. It also makes focus and follow-through harder. Both sides are part of how I work.
04 / Contact