Open to opportunities

João Rietra

@joorietra

Message

I build evaluated AI systems with LLMs, computer vision, robust data pipelines, and production-grade retrieval.

Brazil

Message

What I'm looking for

I'm looking to build production AI systems where rigorous evaluation, robust data pipelines, calibration, and out-of-distribution generalisation matter as much as model performance.

At LetzGrow, I build an AI-assisted career development platform with an LLM mentor, RAG-grounded recommendations, agentic development plans, and candidate-to-opportunity matching. I design the production data architecture from PostgreSQL and pgvector to Redis workflows, while applying fairness evaluation and LGPD-aligned access controls.

At MAPEN and Veritas, I build data, computer-vision, and deepfake-detection systems that prioritise calibration, out-of-distribution generalisation, provenance, and reproducibility. My master's research evaluates medical-imaging models across domains, and I bring the same standard to every model I ship: robust pipelines and evidence beyond a controlled metric.

Experience

Work history, roles, and key accomplishments

Current

AI Engineer

Current

LetzGrow (Grow Group)

Jan 2026 - Present (8 months)

Developed an AI-assisted career development platform, including an LLM-backed AI mentor, agentic flows for personalized development plans, and RAG-based recommendations. Implemented backend on NestJS with PostgreSQL and ensured LGPD compliance.