Lucas Milanez

I build and ship production backend systems for SaaS products, end to end — architecture, API design, deployment infrastructure, and ongoing maintenance.

Over the past year I founded and personally shipped two SaaS products to production: an AI-powered CV generation platform (FastAPI, async fulfillment with Stripe webhooks, Claude API structured outputs, 6 languages) and a multi-tenant monday.com integration (Fastify/TypeScript, BullMQ, Redis, OAuth2 with AES-256-GCM token encryption). Before that, I built internal Flask/FastAPI tools and ETL pipelines for an industrial company and for Brazil's federal land agency, consolidating multi-source data into real-time Power BI dashboards.

What I bring to a mission:

FastAPI/Flask APIs designed for production from day one — rate limiting, async background jobs, structured error handling

PostgreSQL schema design with multi-tenant isolation

Redis-backed caching, sliding-window rate limiting, job orchestration (APScheduler, BullMQ)

Docker multi-stage builds, CI/CD, deployment on VPS (Hetzner/Caddy) or cloud

Integration with third-party APIs, payment systems (Stripe), and LLM APIs (Claude)

Available for remote backend missions, CET/WET timezone. Native Portuguese, working English (B1) — comfortable with async written communication, prefer written specs over live calls for fast-paced English-only discussions.