Hi, I'm Rafal Muszynski.
RSS FeedPersonal notes on building products, design, and software engineering.
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How I built a RAG Slack bot (and what I learned making it useful)
• 7 min readThree failures that taught me RAG is mostly normal engineering — a silent retrieval bug, undersized chunks, and a self-contradicting prompt.
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How I use Claude Code
• 7 min readA year of daily use. Config files, skills, hooks, and the workflow that actually stuck.
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How I became an 'overnight artist' (thanks to AI)
• 2 min readI painted my first ever canvas with zero experience, guided step‑by‑step by AI.
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Private beta for my second SaaS: BetterFeedback
• 2 min readAnnouncing a private beta, what I’m building, and how I help teams understand customer feedback faster.
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Four years building a bootstrapped SaaS (and the acquisition)
• 2 min readA short reflection on building Harmonizely for four years, the transition to full-time, and what came next.
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How I started my SaaS side project while working full-time
• 4 min readA candid look at building Harmonizely nights and weekends: validation, MVP, beta, and the first paying customer.