Bálint K.
Product Builder • Consultant • Researcher
Budapest, Hungary
Summary
Experienced product researcher and consultant with a long track record of short-term and contract roles across startups, agencies and corporate labs.
Active in public product and engineering feedback: files detailed bug reports and UX investigations on open-source platforms to surface product defects. github+2
Publishes long-form video content focused on AI, product research, UX and psychology through a personal YouTube channel. youtube
Formal higher education with a Bachelor's and a Master's degree from Hungarian universities, underpinning a career in research and product roles.
Work
Education
Projects
Writing
bug: Provider names in LLM Connection hate colons and spaces but won't tell you—they'll just gaslight you for 3-4 hours instead.
November 1, 2025Detailed bug report showing that provider names containing colons or spaces can cause Langfuse model selection to fail silently, with reproduction steps and suggested fix.
Master PW Hints transforming into unicode replacement character U+FFFD in my email
June 1, 2025Issue report documenting how emoji-based master password hints render as Unicode replacement characters in email notifications, with steps to reproduce and UX impact analysis.
bug: Save new LLM API key fails silently
March 1, 2025Bug report describing a silent failure when saving new LLM API keys in Langfuse's UI, including reproduction steps and context.