full-stack product engineer in the czech republic. react and typescript on top, node underneath. i'd rather own the whole vertical slice, api to UI, than half of it.

looking for what's next: remote product engineering, CET/EMEA hours. my last contract wrapped in august 2026, so the calendar is open. the portfolio has case studies and a CV; /hire is the fast version for recruiters.

• cc-browse reads Claude Code conversation history in a browser. full-text and semantic search across every session, including subagent transcripts. two files, no build step.
• claude-skills is the set of Claude Code skills that run my actual days: a morning briefing built from conversation history, an end-of-day log, an ADHD thought-structurer. started situational, generalized once i kept reaching for them.
• cc-bench checks whether a CLAUDE.md actually changes model behavior, instead of trusting that it does. swaps the config, runs the same prompts against a broken little repo, counts what changed. live demo.
• powder-lab is a falling-sand sandbox, ~14 materials that burn, flow, and dissolve at 60fps. react owns the buttons, an imperative core owns the pixels, so the simulation never touches a re-render. play it.
• aw-watcher-git is an ActivityWatch watcher that logs which repo and branch i'm actually in, editor-agnostic. three layers of detection so it doesn't lie to me.
• humanizer-cz is a Claude Code skill that detects AI writing patterns and rewrites toward something a person would send, with a Czech grammar appendix and banned-word list.
• pixel-patrol and micro1-hackathon are two hackathon entries, both submitted august 2026: a GDPR drift watchdog and an agent build.

a couple of Vite + React starters round out the list, the kind of scaffolding i got tired of rebuilding by hand.

NDAs cover the client work, so descriptors instead of names. the piece i'd show first: most of a client's flagship react native app, 918 commits from april to july 2026. clustered map pins with screen-space decluttering, in-app chat, purchases, push notifications, store-ready release builds on both platforms, and the nestjs endpoints the screens needed. before that, solo frontend on a staffing marketplace MVP, first commit to launch-ready, working against an external backend dev. and two apps for one of the biggest czech energy suppliers.

all of it under one long remote contract (atreo digital, april 2024 to august 2026) plus freelance work on the side.

reach me at misa.psencik@gmail.com or through the portfolio.