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Full Stack Developer with 3+ years of experience designing and delivering high-performance systems. Expertise in backend microservices (Node.js — Java — Spring Boot — gRPC — C++), RESTful APIs, database optimization (PostgreSQL — MongoDB), and frontend interfaces (React — Angular). Proven track record of boosting throughput, modernizing legacy platforms, and leading developer training initiatives.…Full Stack Developer with 3+ years of experience designing and delivering high-performance systems. Expertise in backend microservices (Node.js — Java — Spring Boot — gRPC — C++), RESTful APIs, database optimization (PostgreSQL — MongoDB), and frontend interfaces (React — Angular). Proven track record of boosting throughput, modernizing legacy platforms, and leading developer training initiatives.

Mateus Zancho Neto

Full Stack Developer, Web Developer, Front-End Developer, +2

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Full Stack Developer with 3+ years of experience designing and delivering high-performance systems. Expertise in backend microservices (Node.js — Java — Spring Boot — gRPC — C++), RESTful APIs, database optimization (PostgreSQL — MongoDB), and frontend interfaces (React — Angular). Proven track record of boosting throughput, modernizing legacy platforms, and leading developer training initiatives.…Full Stack Developer with 3+ years of experience designing and delivering high-performance systems. Expertise in backend microservices (Node.js — Java — Spring Boot — gRPC — C++), RESTful APIs, database optimization (PostgreSQL — MongoDB), and frontend interfaces (React — Angular). Proven track record of boosting throughput, modernizing legacy platforms, and leading developer training initiatives.

Available to hire

Full Stack Developer with 3+ years of experience designing and delivering high-performance systems. Expertise in backend microservices (Node.js — Java — Spring Boot — gRPC — C++), RESTful APIs, database optimization (PostgreSQL — MongoDB), and frontend interfaces (React — Angular). Proven track record of boosting throughput, modernizing legacy platforms, and leading developer training initiatives.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Portuguese

Fluent

English

Fluent

Spanish; Castilian

Advanced

Work Experience

Full Stack Developer at Self-Employed

May 1, 2025 - November 15, 2025

Developed a complete system from scratch for monitoring electronic invoices, helping companies streamline their accounting processes. Built a flexible and reactive frontend using React with Next.js, enabling responsive and dynamic user interfaces. Implemented Test-Driven Development (TDD) with Jest, achieving ~80% test coverage to improve reliability. Applied Tailwind CSS and Shadcn UI for consistent, responsive styling. Designed the database layer with Prisma ORM and PostgreSQL for efficient data management. Deployed the frontend on Vercel and microservices on AWS (EC2 and S3) with Docker. Built backend microservices in Rust for asynchronous file processing and compression, delivering a ~5x performance improvement over a Node.js baseline.

Senior Full Stack Developer at SG AUTOMATION SYSTEMS

April 1, 2025 - April 1, 2025

Led end-to-end development across Java/Spring Boot and Rust components. Implemented a proxy REST API that used gRPC to communicate with C++ programs, reducing inter-system latency by 45% and deployed via Docker. Built high-performance services to interact with the Federal Revenue SOAP APIs for issuing NFE/NFCE for over 1,500 simultaneous companies. Created an Angular.js frontend for configuring business parameters and promotional campaigns, supporting 200+ daily active users on AWS. Developed Harbour/C-Harbour abstractions to optimize DBF processing and vector loops. Mentored a team of 4 trainees, improving onboarding time by 30% and promoting software engineering best practices.

Full Stack Developer at SG AUTOMATION SYSTEMS

December 1, 2023 - December 1, 2023

Modularized system architecture using Harbour to implement a search algorithm across modules. Automated repository file reading and character filtering with Rust to block malicious characters during compilation. Implemented RESTful APIs for system integration, using Harbour to minimize the need for multiple custom programs. Refactored Harbour’s Maker compiler into C++, increasing overall compilation speed by 300%. Published the Compex VS Code extension in JavaScript to automate build processes and terminal commands.

Junior Full Stack Developer at SG AUTOMATION SYSTEMS

January 1, 2023 - January 1, 2023

Implemented search systems in TUI browsers using Harbour, improving information retrieval. Automated dynamic information list generation with Harbour, enabling users to define columns and sorting order. Developed C library abstractions for Harbour to enable communication between the terminal and running applications.

Junior Full Stack Developer at SG AUTOMATION SYSTEMS

March 1, 2022 - March 1, 2022

Developed and maintained Terminal User Interfaces (TUI) using Harbour and xHarbour for inventory management, product offers, and promotions screens. Automated sales and profitability report generation by processing DBF files on Linux servers and producing PDF reports.