Matheus Theodoro

Avenza Security 2024 — Present

Founder & AI Security Engineer

Building a practical AI security practice for companies shipping LLM applications, agents, and AI-enabled products.

  • Built RedThread — an open-source AI red-teaming and defense-evidence engine for LLM and agentic systems
  • Ran adversarial campaigns using PAIR, TAP, Crescendo, GS-MCTS across 4+ attack objectives
  • Implemented JudgeAgent/G-Eval scoring with OWASP LLM and MITRE ATLAS categories
  • Built defense synthesis pipeline: exploit trace → scoped guardrail → replay validation → promotion evidence
  • Delivered AI red-team assessments, prompt injection testing, and agentic security reviews for multiple clients
View RedThread
Avenza Cloud 2022 — Present

Software Engineer II

Building secure cloud infrastructure and backend systems for SaaS platforms operating at scale.

  • Architected backend APIs and cloud infrastructure serving 10+ clients with 99.9% availability
  • Designed and maintained AWS/Kubernetes deployments with mTLS, RBAC, and secure data storage
  • Built telemetry and monitoring pipelines using Elastic Stack for distributed systems observability
  • Implemented CI/CD pipelines and secure SDLC practices across the engineering stack
  • Protected $2.8M+ in client revenue through infrastructure reliability and security controls
Marketisa 2020 — 2022

DevSecOps / Software Engineer

Integrated security practices into the software development lifecycle and cloud operations.

  • Implemented secure SDLC practices including credential handling, input validation, and access controls
  • Built and maintained cloud infrastructure with monitoring, alerting, and incident response
  • Developed backend services and APIs with Python and JavaScript across distributed systems
  • Established security review processes for code deployments and infrastructure changes

Notable Projects

Open Source 2025 — Present

RedThread

CLI-first autonomous AI red-teaming and defense-evidence engine. Runs adversarial campaigns with PAIR, TAP, Crescendo, GS-MCTS. Scores traces with JudgeAgent rubrics. Synthesizes guardrails and validates through replay.

View on GitHub — 17 ★
Hackathon 2025

WindWhisper

NASA Space Apps 2025 — global nominee and local 1st place. AI-powered wind prediction and visualization platform combining computer vision, backend data pipelines, and real-time inference.