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Benjamin D
@benjamin_reiis
Software Engineer
Brazil
Portuguese
About me
I am a Backend Software Engineer specialized in building scalable and secure software solutions for businesses and startups.
I develop REST APIs, backend systems, and custom applications using Java, Spring Boot, Node.js, PostgreSQL, and SQL Server. I have experience with microservices, database optimization, Docker, Cloud, and DevOps.
I help clients build business platforms, ERP systems, dashboards, integrations, authentication systems, and reliable backend solutions focused on performance, security, and maintainability.
Skills
Benjamin D
Offline •
Average response time: 1 hour
See my services
Full Stack Web Applications
I will develop a custom java spring boot rest API
Full Stack Web Applications
I will business management system erp
Portfolio
Work experience
Software Engineer | Backend Architecture
Upwork • Freelance
Oct 2022 - Jun 2026 • 3 yrs 8 mos
Acted as a Backend Software Engineer focusing on systems architecture, high scalability, and performance optimization in critical production environments. Achieved a 42% reduction in API response times and a 3.8x increase in request processing capacity. Managed over 1.2 million monthly requests and automated 120+ SQL queries. Developed a transfer system capable of processing 50,000 transactions with high reliability and delivered over 60 projects for international clients.
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Java Developer
Fiverr • Freelance
Jan 2020 - Jul 2021 • 1 yr 6 mos
Developed and evolved distributed systems using Java, focusing on performance and reliability. Maintained scalable APIs for over 100,000 active users and optimized application performance, reducing response times by up to 70%. Automated critical processes saving 200 operational hours monthly. Identified and resolved critical bugs, reducing production incidents by 50%. Collaborated with product teams to refactor legacy components and improve user experience.
