Pedro S.

Fractional CTO | AI Architect | Production AI Systems

Expert-Vetted on Upwork (Top 1%). Fractional CTO and AI engineer. 15+ years building search systems, ML platforms, credit engines, and recommendation systems across biotech, fintech, and martech. The implementation layer is getting cheaper every quarter. Judgment about what to build, when, and with what tradeoffs has gotten more valuable. That's where most of my time goes now. 𝗪𝗵𝗮𝘁 𝗜 𝗱𝗼 • Help you decide what's worth building • Help you scope it without painting yourself into a corner • Take the technical side off your plate for a while 𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸 • I'll tell you not to build it if it's not worth building • I push back, and I expect you to push back on me • I take responsibility, and I expect the authority that goes with it 𝗦𝗲𝗹𝗲𝗰𝘁𝗲𝗱 𝘄𝗼𝗿𝗸 • Medical-legal document extraction. Owned architecture, build, and the calls about what to automate vs leave to humans. Weeks of analyst review compressed to minutes. The interesting problems weren't the AI ones. • Scientific AI platform for biotech R&D. Took a working PoC to a system the team actually relies on. Parser reliability, confidence calibration, CI/CD benchmarking. • AI-assisted event marketplace. Backend architecture, payments, AI planning assistant. • Domain-adapted speech recognition for spacecraft operations. Real-time voice-loop capture, indexed searchable transcripts, deployed across multiple missions. • Personalized footwear production pipeline. Parametric CAD + automated manufacturing instructions. 2 days → 30 minutes per pair. Made the unit economics work. 𝗘𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁𝘀 • Initial Fit Call — free. 30-min call + follow-up memo with 2–3 ranked next steps. • AI Product Audit & Roadmap — from $7k, ~2 weeks. Pressure-test scope, architecture, stack, failure modes, team shape. • Fractional CTO — custom, usually 10–20 hrs/week for 3–6 months. I own architecture, technical direction, and execution quality. Stack often includes: Python/FastAPI, TypeScript/React/Next, Postgres, GCP/AWS, OpenAI/Anthropic, RAG, vector search.