André Ferretti

SOFTWARE DEVELOPER

Tallinn, Estonia

Clearer Thinking

July 2022–Present

Built decision-making tools and conducted research for our psychology newsletter with ~400,000 subscribers.

Ultimate Personality Test Personality test completed by 300k users that combines the 3 most popular frameworks in 1: MBTI, Big Five, Enneagram (plus our own one). It also provides AI-powered life advice using Gemini.
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Unique Traits Test A modular assessment measuring 86 traits, including autism, ADHD, anorexia, anxiety disorder, narcissism and OCD.
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Personal Projects

Pact-Man A negotiation game where a GPT-powered VC agent negotiates five deal terms against a human founder, with an AI judge scoring each round.
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Semantic Stock Search Finds large-cap stocks by semantic meaning rather than keywords (e.g., "parapapapaaa i'm lovin it" → McDonald's), using Gemini's Embedding API.
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AI Council Sends the same prompt to multiple of the smartest LLMs simultaneously (Claude, GPT, Gemini, Grok) via OpenRouter and shows responses side by side.
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LinkSnip A URL shortener with click analytics, built to learn new things like hosting on a VPS (instead of Vercel), self-hosted Postgres database (instead of Supabase), Docker, and a CI pipeline with GitHub Actions and Vitest.
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Hair Guard Uses your camera to spot when your hand sneaks toward your hair — and nudges you to stop. Runs locally, nothing leaves your device.
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