Rodrigo Ferraz Villaca

Designed and implemented the engineering org's multi-platform SDLC automation agent suite — the same agents run on both Claude Code and Codex, covering ticket pickup, branching, implementation, code review, and PR shipping.

Architecting the company's AI integration layer with LangChain — pipelines, structured-output schemas, and model-selection abstractions consumed by services in Java, TypeScript, and Python.

Owning the platform's vector retrieval / RAG infrastructure: pgvector in Postgres for tenant-partitioned semantic search over operational client/carrier data (vector store co-located with the relational data), and ChromaDB as the knowledge base the SDLC agents query for the team's coding standards and recurring architectural patterns.

Driving the engineering standard for building, deploying, and operating agent-based developer tools at scale — TDD-driven agentic implementation, structured plan files, verification-before-completion gates, and a runtime-agnostic abstraction layer so the org isn't locked to one coding-agent vendor.

Polyglot production stack: Java, TypeScript, Python. Coding-agent runtimes: Claude Code, Codex, Antigravity, OpenCode.

Returned to lead architecture across multiple SaaS engagements after a year at Nortal. Worked on consulting with several different clients.

Back working on the same medical prescription app developed previously, adding multiple Ionic/Capacitor custom native plugins using Java and Swift for VoIP, 2FA, cryptography, and structured debug logging. For this same app, implemented OAuth + identity verification with id.me and LexisNexis; WCAG, Touch ID, NFC on mobile. Architected serverless on AWS (Lambda, RDS, Aurora, DynamoDB) with Route53 SDK automation; GCP / Firebase for push notifications. Backend APIs in Node.js, .NET Core, Java (Spring Boot), and PHP. React, Next.js, Redux development across product surfaces.

Senior Angular developer on T-Mobile's public shop — migrated workflows across Angular 7 → 9.

Built framework-level code and core components used throughout the checkout flow.

Built core components for electronic payments and credit validation.

Backend middleware in Node.js (Hapi); implemented Redis cache.

Produced UML diagrams to document system design across the shop's framework layer.

Main developer for the Angular-based framework used across multiple SaaS engagements at a consulting firm focused on regulated-industry software. Angular tech lead — mentored US and India teams on Angular, RxJS, TypeScript, OOP, and state management. Architected and implemented NgRx and Akita state-management patterns across multiple applications.

Built a medical prescription app under HIPAA-class and payment-data compliance, on Ionic/Capacitor. Consulted on a large retail-agency software platform and a large telecom Angular-based e-commerce. Drove large-scale migrations: AngularJS 1.x → Angular 11.x, Ionic 1 → Ionic 5/6. Established NX monorepo patterns and Jenkins/Groovy + GitHub Actions pipelines for multi-app builds. Mobile foundations on Ionic / Capacitor / Cordova for Android + iOS. Backend APIs in Node.js, .NET Core, Java, and PHP.

Developed hospital management software (.NET Core, .NET Enterprise, C#, WebAPI, WPF, AngularJS).

Designed and maintained SQL Server databases and stored procedures.

Unit tests with Karma/Jasmine/Visual Studio; E2E with Protractor.

Managed projects in both SCRUM and waterfall modes via Team Foundation Server.

True Access (2009–2010) — infosec consulting and vulnerability analysis for telecoms, banks, and government. PKI engineering for the Brazilian Payment System (interbank/stock-market/insurance online settlements). CheckPoint specialist managing hundreds of security devices centrally.

Spring Wireless (2005–2008) — led a 10-person infrastructure team; ran a 24×7 mission-critical telecom datacenter at 99.98% SLA; stood up 20,000-user data centers from scratch; built custom monitoring plugins in C# and PHP/Zabbix; implemented VOIP + Asterisk PABX (significant cost reduction); defined infra and security requirements for international clients across 9 countries (on-site in Brazil, Russia, Poland).

CSIT Services (2000–2003, 2005) — infrastructure consultant for Sony, Microsoft, Adobe, GE, Citibank, BNP Paribas, Bank of Tokyo, Mitsubishi, Pfizer, Caterpillar, ABB, Duke Energy, and major Brazilian banks; built HA solutions at multiple banks for their Brazilian Payment System integrations (the Brazilian Central Bank's funds-transfer rail that every Brazilian bank must integrate with); led IP networking, wireless authentication, remote access, and MS/Novell/UNIX interoperability projects.

Imares (late 1990s) — Windows infrastructure in the NT 4 era: NT 4 networking, SQL Server, and Exchange Server administration.

UOL (~1998) — Internet provider helpdesk at Brazil's pioneering ISP / web portal. Where this 25+ year engineering career started, before the climb through infrastructure, security, architecture, and product engineering.

Deep stack of certifications across Microsoft (MCSE NT/2000/2003 — 24 exams), Cisco (CCNA), Novell (CNE/CNA), Checkpoint (CCSA/CCSE+), CompTIA Security+, Symantec, ITIL.