Lucas Casteletti

Designed and operated an AI-assisted development workflow on Claude Code and OpenSpec, using a four-stage spec lifecycle with specialized agents and traceable, human-approved outputs. Built and shipped an offline-first React Native (iOS + Android) real-time chat product, including an offline sync layer and automated CI/CD for mobile releases.

Built an internal AI platform for data ingestion and workflow orchestration combining Sourcegraph (RAG over the codebase), LangChain, and n8n. Created reusable templates for cross-codebase refactors, authored RFCs/ADRs, and implemented a Go microservice to standardize Bazel dependency management across the iOS build pipeline.

Led a cross-platform BFF rewrite in Kotlin and Spring to unify Android, iOS, and Web behind a single backend for consistent API contracts. Shipped e-commerce and payment features for an iOS B2B app within a cross-functional product squad.

Built and maintained ML-backed microservices that powered credit-score and risk decisions in a consumer loans approval pipeline, enabling real-time decision display in the mobile flow. Owned end-to-end development of the consumer loans mobile app, delivering a multi-step approval funnel for applying, configuring, and managing personal loans.

Delivered multiple consumer products end to end across architecture, implementation, code review, and releases, including the award-winning Philz Coffee app. Contributed to risk analysis and PoCs, and provided mentorship to development and QA team members.

Architected internal frameworks and built location-aware iOS apps using Core Location and beacons. Developed an iOS white-label app framework and an internal email marketing framework.

Completed a program in Analysis and Systems Development at Instituto Brasileiro de Tecnologia Avançada from 2015 to 2017.

Earned a B.S. in Game Development at FATEC from 2011 to 2014.