Senior Full-Stack Engineer
Full-Stack Engineer
Available for hire
Years of
experience
6+ years
Experience
level
Senior
Available
for
Full-time, Part-time, Contract, Freelance
Available from
07 Jul 2026
Senior Full-Stack Engineer with 6+ years building production systems in Java/Spring Boot and React/TypeScript. Currently the sole engineer on an independent contract for a Brazilian industrial enterprise, owning end-to-end decisions on architecture, integrations, and reliability. Proven track record leading high-impact migrations and delivering measurable results, including 90% faster critical SQL queries and 25% lower AWS spend through telemetry-driven optimization. Known for mentoring juniors and championing code review culture.
Skills
Languages
Employment History
Senior Software Engineer at
Independent Contractor
Current
2026
-
Now
Direct B2B engagement as the sole technical specialist developing a customer-facing platform for self-service business operations. Engineered end-to-end payment integration with Banco do Brasil (PIX and Boleto) using mTLS and OAuth2, with automatic ERP reconciliation. Led migration of principal backend API from monolith to Spring Modulith architecture. Authored Swagger/OpenAPI documentation with unit and integration test coverage using Testcontainers.
Software Engineer at
e-Core
2025
-
2025
Logistics scheduling system for inbound truck loading, integrated with client ERP. Optimized AWS infrastructure based on production telemetry, reducing monthly cloud spend by 25% ($800 to $600). Restructured CloudWatch logging with consistent standards improving observability. Extended Sankhya ERP integration, built generic data export module, authored Swagger/OpenAPI documentation with Testcontainers test coverage. Mentored QA engineer transitioning to Junior Developer role.
Software Engineer at
Magis5
2023
-
2025
B2B SaaS ERP for Brazilian e-commerce sellers. Drove decomposition of PHP monolith into 4 Spring Boot microservices, leading migration of expense and revenue posting module. Optimized Cloud SQL queries reducing response times by up to 90% through indexing, query rewriting, and execution plan analysis. Introduced code review practices, mentored junior developers, and designed Redis caching layer for high-traffic endpoints.
Software Engineer at
SENAI Innovation Institute
2023
-
2023
R&D project: IoT data platform feeding AI/ML training pipelines for a multinational client. Built Spring Boot APIs to ingest data from industrial IoT devices and expose it to AI/ML training pipelines. Acted as technical bridge between embedded systems and AI research teams. Translated client requirements into technical specifications and API contracts. Designed PostgreSQL schemas for IoT telemetry storage with unit and integration test coverage.
Full Stack Developer at
CDNTV
2021
-
2023
White-label OTT platform (IPTV, TVOD, SVOD, NVR) self-hosted by approximately half of Brazil's internet service providers. Built the entire VOD module for Samsung Tizen TV application using React.js and TypeScript. Designed and shipped admin platform features in Laravel. Spearheaded Docker adoption across development and production environments. Modeled SQL and NoSQL schemas for catalog metadata, recording indexes, and analytics workloads.
PHP Developer at
E-Trust
2020
-
2021
Identity and Access Management (IAM) platform for enterprise clients. Maintained and extended platform integrations with Active Directory/LDAP, REST APIs, and legacy SOAP web services for user provisioning and access control workflows. Resolved production bugs and delivered ongoing improvements. Conducted code reviews and authored technical documentation.
Education
Bachelor's Degree (Technology), Systems Analysis and Development at
IFSUL (Federal Institute), Brazil
2020
-
2025
Technical High School Diploma, Web Development at
IFSUL (Federal Institute), Brazil
2016
-
2019