RODRIGO MAFFEI

Built and automated deployment infrastructure from scratch using Docker, Ansible, Traefik, and GitHub Actions, reducing release time from 2 hours to 10 minutes and implementing HTTPS, environment and secret management, CI/CD, and controlled promotion to staging. Developed cloud backend services end to end for a tracking, inventory and certification solution, implementing authentication, authorization, multi-user management, data contracts, migrations, and access controls during an initial production rollout across two installations. Solved edge-cloud bidirectional synchronization between SQLite devices and PostgreSQL using SymmetricDS, versioning sync configuration inside the API for incremental rule rollout and isolatable testing. Defined platform architecture and established code review practices for a 6-person team, while also improving testing by introducing device simulation mechanisms and Playwright-based automation to roughly 60% coverage.

Owned and delivered 7 FastAPI microservices as the sole backend engineer for AdCap, a financial application projected for 10,000 to 20,000 investors, covering stock trading and mutual fund subscriptions and handling deposits in local currency and USD. Configured Keycloak as identity provider using OAuth2 and OpenID Connect, integrated external market services, and maintained Java/Node.js modules to resolve incidents without interrupting platform operations. Built the company flagship WhatsApp mass-campaign chatbot logic within a 5-person team, implementing LangChain chains on top of the OpenAI API with memory/context management and moving the RAG layer into working state for campaigns sized for 1,000 to 2,000 contacts.

Developed an end-to-end enrollment management system for an educational institution, including data modeling, Flask APIs, and a user portal implemented with Angular and Bootstrap over MySQL. Supported 800 to 1,000 enrollments per cycle, shipped functional and security improvements over time, and maintained service continuity through multiple production enrollment cycles.