lennix

Lucas Souza, senior engineer from Brazil. I ported a 2,300-star C++ tool to Windows with AI agents, and I build the tools those agents use on real codebases.

“just use AI bro like wtf”

Selected work

The road so far

  1. Now

    Sertrading Senior software developer

    B2B products and high-scale internal systems for one of the largest trading companies in Brazil, on Next.js and NestJS.

  2. DentAI Main developer

    Architecture to production as the only engineer, for a platform past 4,000 users. Generative media on Gemini and Veo 3, RAG for clinical assistance, and a Next.js 15 migration that took load times from 15 seconds to under 4.

  3. UNIVALI Senior software engineer

    Lead architect of the Universidade Gratuita program, serving 20,000+ users. Automated document intake for 3,000+ candidates, saving 100+ hours of manual work, and built the scholarship review flow with legally binding e-signatures.

  4. Brisbane, Australia Canterbury Technical Institute

    Two years abroad: a Diploma of Software Development, then an Advanced Diploma of IT. Came back fluent in English.

The language is a detail. The work is the spec, the contracts, the failure modes and the proof that the deploy did what it said.

Usually in TypeScript, Next.js, NestJS, React, Node.js, C#, PostgreSQL, Docker, AWS and GitHub Actions, with Claude, Codex and Gemini doing the typing.

Summon me

Systems, AI tooling, or something that shouldn’t be possible. My inbox is open.