Open to opportunities

Régis dos Santos

@rgisdossantos

Message

I’m a full-stack software engineer who scales production systems with Node.js, React, and performance optimization.

Brazil

Message

What I'm looking for

I’m looking for a backend-focused full-stack role where I can modernize legacy systems, build scalable microservices and event-driven architectures, and keep improving performance, reliability, and user experience with measurable impact.

I’m a Full Stack Software Engineer with 5+ years of experience building and scaling production systems across advertising, ERP, and government sectors. I’m backend-focused with strong expertise in Node.js, distributed systems, and performance optimization, while delivering modern frontend experiences with React.js.

In my recent work, I’ve improved legacy systems to reach 80%+ user satisfaction, delivered workflows with 70%+ approval, and increased efficiency and revenue by 22%+. I’ve also reduced database query time by 15%+ and improved performance and reduced latency by up to 40%, helping raise reliability and user satisfaction to 80%+. I enjoy modernizing legacy platforms into scalable architectures—especially through microservices, REST APIs, and event-driven systems.

Experience

Work history, roles, and key accomplishments

Full Stack Engineer

Connectmix

Oct 2024 - Mar 2026 (1 year 5 months)

Improved legacy systems, achieving 80%+ user satisfaction and increasing efficiency and revenue by 22%+. Reduced database query time by 15%+ and implemented 70%+ approval workflows to streamline operations.

TypeScript REST APIs Microservices Distributed Systems Performance Optimization PostgreSQL Docker CI CD

Full Stack Engineer

IPM Sistemas

Feb 2022 - Jul 2024 (2 years 5 months)

Migrated a legacy system to Node.js and React, reducing login latency by 20% and improving backend workflows by 15%. Delivered backend and full-stack improvements that modernized platform behavior and performance.

Node React JavaScript TypeScript REST APIs MVC Performance Optimization PostgreSQL CI CD GitHub

Full Stack Engineer

Go Labs

Sep 2021 - Jan 2022 (4 months)

Reduced authentication errors by 35% and improved system performance by up to 45% through backend and integration fixes. Strengthened authentication reliability while delivering full-stack performance improvements.

TypeScript REST APIs Authentication Performance Optimization Distributed Systems Docker RabbitMQ CI CD