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Rafael Metzler LemosRL
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Rafael Metzler Lemos

@rafaelmetzlerlemos

Industrial software and data engineer at General Motors building shop-floor platforms, including a tightening-data system with US$280K immediate impact.

Brazil
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At General Motors, I designed and built JVL-TDP, a tightening-data platform that replaced ToolsNet 8 and delivered US$280K of immediate impact. It became a company-wide reference for standardizing tightening-data acquisition software.

For JVL-TDP, I built the ingestion layer for 280+ Bosch Rexroth controllers by interpreting captured TCP traffic, and reverse-engineered the proprietary BS350 binary protocol. I shipped six milestones through autonomous on-premise deployment, with observability in Prometheus, Grafana, and Loki.

On JVL-MIP, I built an ML pipeline that predicts torque at R²=0.9988 and flags thermal runaway and tool wear in an air-gapped environment. Across the Q-DAS ecosystem, I built a Flask portal, a real-time monitor for 60+ stations, and two read-only MCP servers for audited access to quality data.

My work at General Motors also includes quality engineering and manufacturing launches. I automated Q-DAS reporting, helped prevent cylinder-head scrap valued at about R$190K, and implemented an activity-management system adopted across South America Manufacturing Engineering.

Experience

Work history, roles, and key accomplishments

General Motors logoGM
Current

Software / Data Engineer (Industrial Platforms)

Jan 2026 - Present (9 months)

Designed and built JVL-TDP, a tightening data platform in Go, React 19, and TimescaleDB, replacing ToolsNet 8 with US$280K impact. Built ML pipeline for torque prediction and thermal runaway detection, and developed MCP servers for audited quality data access.

General Motors logoGM

Industrial Engineering Intern

Apr 2021 - Feb 2022 (10 months)

Built MTTR, MTBR, and operator-time analyses in Power BI. Applied VSM and helped cut downtime by ~17%, and won the internal 'Most Disruptive Idea – 2021' award.

Education

Degrees, certifications, and relevant coursework

Universidade de São Paulo logoUP

Universidade de São Paulo

MBA, Industrial Management

2022 - 2024

MBA in Industrial Management from Poli-USP, completed from October 2022 to October 2024.

UN

UNIGUAÇU

Bachelor of Science, Mechanical Engineering

2017 - 2022

Activities and societies: Founder of the META Junior Enterprise; BAJA project member

B.Sc. in Mechanical Engineering from UNIGUAÇU, graduated with honors, 2nd overall in class, top ENADE mock-exam performance, founder of the META Junior Enterprise, and BAJA project member.

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