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Eduardo Antônio Trés de Souza

@eduardoantniotrsdeso

Senior Full-Stack Developer building B2B SaaS products end to end, including an agribusiness platform with a financial module and billing engine.

Brazil

Message

I currently develop two B2B SaaS products as an independent contractor: an agribusiness platform for coffee and grain post-harvest management, and a pickup-point logistics platform. For the agribusiness product, I designed financial modules and a drying-fee billing engine, and I maintain 100% automated test coverage with PHPUnit.

I also manage AWS infrastructure and production operations, including an RDS migration that saves about US$100/month. Previously, I developed features for a cryptocurrency exchange at Dacxi / Wealth99 and worked on ERP, marketplace integrations, and multi-tenant SaaS systems.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Developer

Current

Independent Contractor

Oct 2024 - Present (2 years 1 month)

Lead end-to-end development of two B2B SaaS products, including an agribusiness platform and a pickup-point logistics platform. Manage AWS infrastructure and maintain 100% automated test coverage with PHPUnit.

PHP Laravel PostgreSQL REST APIs PHPUnit Docker AWS EC2 RDS Supervisor React Next.js TypeScript Tailwind

PHP Developer

Dacxi / Wealth99

Jul 2022 - Oct 2024 (2 years 3 months)

Developed and maintained features for a cryptocurrency exchange platform, including support for new cryptocurrencies and fiscal reports. Built system health monitoring features and integrated OneSignal push notifications.

PHP Laravel Laravel Nova Redis PHPUnit REST APIs Docker Blockchain MySQL MongoDB

PHP Developer

Digital2B

Feb 2022 - Jun 2022 (4 months)

Worked in an Agile squad on a modular SaaS ERP, building social media management and product sales modules. Developed NF-e issuance and marketplace integrations with Mercado Livre, Magazine Luiza, and Netshoes.

PHP Laravel REST APIs JavaScript jQuery AWS HTML5 CSS

PHP/Laravel Developer

Oratrix, NeoProj, DevForBusiness, Infrawall

Apr 2020 - Jan 2022 (1 year 9 months)

Built a real-time chat platform integrated with the WhatsApp Business API, multi-tenant SaaS systems for healthcare, and ERPs for vehicle fleet management and construction.