Senior Full-Stack Engineer · Founding Engineer

Zaragoza, Spain · CET · EU citizen · Remote-first · Available on short notice

[email protected] · +34 641 42 72 39 · octaviantocan.com · github.com/OctavianTocan · linkedin.com/in/octavian-tocan

Experience

TwinMind — Lead Web Engineer (Core Contractor)

Nov 2025 – May 2026

AI-powered memory and recording app · 81,778 MAU · Series A targeting $130–150M valuation

• Rebuilt ~25% of the codebase; improved memory-page load times 43×
• Led all web and full-stack work; sole engineer on the React Native brownfield repo
• Shipped Daily Digest, Todo page, Enhance Transcribe, and My Mind analytics dashboard — each end-to-end from data layer to UI
• Built full CI infrastructure: GitHub Actions across 4 branches, PostHog feature flags, Chromatic visual regression, Playwright E2E
• Cut React Native CI build time from 45 min → 8 min with one Gradle-cache change
• Security-hardening pass: CSP headers, CORS, SOC 2 14-day session timeout, ZAP findings remediation
• Caught a high-risk TypeScript synthetic-event cast in PR review — turned it into a permanent codebase-wide static-analysis rule
• 3,425 GitHub contributions in 12 months · 1,000+ commits and 79 PRs in first 3 months · MAU grew ~50k → 81,778 (~62%) during my tenure

Infima Games — Co-founder & Technical Lead

2021 – 2026

Game-dev asset company built from zero · Now in maintenance mode

• $16,368+ verified Gumroad revenue; consistent sales across Unity Asset Store and Unreal Marketplace