Fullstack engineer focused on operational systems that survive in real production. 6 years iterating on the same kind of problem — from Excel to Next.js + Supabase. Today adding tool calling, prompt caching and multi-tenant Postgres.
6
years shipping real operations
4
products shipped
2 in production · 2 in pilot
$0.02
per AI conversation
AgroTrack MVP
Lucas Rezende
AI Engineer · Fullstack
Selected work
Real systems with real customers, solving operations, sales and data problems. Each case opens a dedicated page with technical decisions, architecture and metrics.
● liveClient · Lyor Arquitetura
B2B institutional platform with filterable catalog, granular per-city SEO and CMS-ready backend — built for organic lead capture in R$ 200k-2M/month corporate leases.
● case studyLivestock-management SaaS — MVP with a pilot running. Farm ERP, digital corral, NDVI via Sentinel-2 and an AI consultant with tool calling integrated with Postgres.
● liveEnd-to-end platform for a plus-size consignment boutique — operations ERP, editorial storefront and in-house logistics, evolving in production for two years.
What I build
Each capability emerged from real production need — not from fashion. The same technical pattern runs through all of them: simple, costed, observable.
Tool calling integrated with Postgres, prompt caching and per-feature model routing. AgroTrack is in MVP with a pilot running.
Schema modeling, Postgres RLS, Supabase Realtime, Edge Functions with pg_cron. 30+ tables with strict tenant isolation.
PWA wrapped as iOS and Android via Capacitor. One codebase, three targets. UX that holds up under poor signal.
Dashboards with actionable metrics for operations. LLM cost monitoring per feature and per workspace. SQL via Supabase Studio.
About
I'm Lucas Rezende, based in Londrina (Brazil). I've been building software for small-business operations for 6 years — started in Excel, moved through VBA, now on Next.js + Supabase. Loja Ella is the current iteration of that cycle: 6 stack versions, 2 years live in production, evolving weekly. It's a business I run with my wife — real skin in the game, not external client work.
The last 2 years brought me closer to LLM systems hands-on — tool calling integrated with Postgres, prompt caching, per-feature model routing. AgroTrack is where I test all that: a livestock SaaS with AI querying fresh data from the database, today an MVP with a pilot running.
Next step: a product team with strong technical culture, where I can learn from more senior people and raise my ceiling. Remote — Brazil or international. Native PT-BR · advanced EN.
Let's work together
I send a clear proposal within 48h. No template, no fluff — only what makes sense for your case.
contato.rezendelucas@gmail.com · +55 43 99108·8043
