Open to opportunities

Matheus Nazaro

@mnazaro

Message

Full-stack engineer optimizing databases and building reliable data pipelines.

Brazil

Message

What I'm looking for

I’m looking for a remote-first team where I can own end-to-end delivery—designing backend systems, tuning PostgreSQL for performance, and building dependable ETL/data pipelines—while collaborating across layers and using AI to accelerate development.

I’m a full-stack engineer with strong expertise in backend systems, databases, and data pipelines, and I enjoy owning end-to-end delivery—from system design to production deployment. I focus on performance optimization and reliability, especially where backend changes directly impact real users and batch outcomes.

At Consulti, I maintain and evolve legacy PHP systems in production while delivering new features and resolving bugs with minimal downtime. I’ve optimized critical PostgreSQL queries—cutting one operation from ~4 minutes to under 1 second and another from ~1m 30s to 430ms—improving the reliability of time-sensitive batch processes.

I also designed and maintain ETL pipelines across 20+ integrations using REST APIs and CSV sources, ensuring data consistency across banking and third-party systems. In parallel, I handle 60+ production tickets per month through root-cause analysis, log investigation, and data reprocessing to minimize downtime, often bridging database, backend, and integration layers.

Earlier, I built frontend features for a React-based startup valuation platform (React-based startup valuation platform) and coordinated a frontend team of 4 through code reviews and sprint alignment. I also developed practical troubleshooting experience as an IT Support Intern, supporting multiple municipal departments, before deepening my technical foundations with a B.Sc. thesis on machine learning for predictive maintenance and performance optimization.

Experience

Work history, roles, and key accomplishments

Current

Systems Analyst

Current

Consulti

Jan 2026 - Present (5 months)

Maintains and evolves legacy PHP systems in production, delivering new features and fixing high-complexity issues with minimal downtime. Optimized critical PostgreSQL queries (4 minutes to under 1 second; ~1m30s to 430ms), designed ETL pipelines across 20+ integrations, and handled 60+ monthly tickets through root-cause analysis and data reprocessing.

PHP PostgreSQL SQL Query Optimization ETL REST APIs Root Cause Analysis

IT Intern

Consulti

May 2024 - Dec 2025 (1 year 7 months)

Supported maintenance of legacy PHP systems by assisting with bug fixes and feature delivery under senior developer supervision. Contributed to PostgreSQL query analysis, data validation, routine monitoring, and helped implement ETL integrations across multiple data sources.

PHP PostgreSQL SQL Query Analysis Data Validation ETL Debugging Software Maintenance

Junior Developer & Brand Lead

EJComp – Empresa Júnior de Computação (UNESP)

Aug 2021 - Nov 2024 (3 years 3 months)

Built frontend features for Valu, a React-based startup valuation platform that reached public go-live, focusing on component architecture, UX prototyping, and responsive design. Coordinated a frontend team of 4 with code reviews and sprint alignment, and owned the organization’s brand strategy including visual identity and social media content.

React JavaScript Frontend Development UX Prototyping Responsive Design Code Review Sprints Team Coordination Brand Strategy Social Media Content

IT Support Intern

Secretaria de Tecnologia de Presidente Prudente

May 2022 - May 2024 (2 years)

Provided technical support across multiple municipal departments, resolving hardware, software, and connectivity issues to ensure operational continuity. Assisted senior technicians with infrastructure maintenance, OS setup, and equipment configuration, and helped standardize support procedures to improve resolution of recurring issues.

Technical Support Network Troubleshooting Infrastructure Maintenance

Education

Degrees, certifications, and relevant coursework

UNESP - Faculdade de Ciências e Tecnologia

Bachelor of Science, Computer Science

2021 - 2025

B.Sc. in Computer Science (2021–2025). Thesis applied supervised machine-learning models to vehicle telemetry data for predictive maintenance and performance optimization, using end-to-end preprocessing, feature engineering, and model evaluation pipelines.