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Osvaldino Neto

@osvaldinoneto

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I build secure, scalable backend APIs and cross-platform mobile applications.

Brazil

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I've built secure, high-availability software across fintech, healthcare, logistics, and web platforms for companies including Datweb Sistemas, Perfect Pay, Pulsati, and Log Lab.

At Perfect Pay, I optimized PHP/Laravel payment processing, built APIs for external payment gateways, and implemented queues and workers for reliable financial transaction flows. At Pulsati, I developed secure APIs and Flutter applications supporting electronic medical record access.

I bring 15 years of experience delivering PHP/Laravel systems, RESTful APIs, microservices, data modeling, and Flutter applications, with hands-on work in MySQL, PostgreSQL, Vue.js, React, and Angular.

Experience

Work history, roles, and key accomplishments

Software Developer

Datweb Sistemas

Sep 2025 - Mar 2026 (6 months)

Built and maintained Promobank web applications in PHP/Laravel across dev, staging, and production environments, supporting corporate clients in a Scrum product squad. Developed RESTful APIs for microservices integration, applying SOLID principles and web security best practices.

PHP Laravel REST APIs Microservices SOLID Design Patterns Web Security Scrum Claude Code

Senior Software Developer

Perfect Pay

Mar 2025 - Sep 2025 (6 months)

Optimized PHP/Laravel payment processing in a fintech environment, reducing transaction processing time and improving throughput. Developed and tested RESTful APIs for payment gateway integration, implemented asynchronous processing with queues, and built Vue.js dashboards for monitoring.

PHP Laravel REST APIs Payment Gateways Web Security Financial Data Protection Queue Worker High Availability Vue.Js Observability

Senior Software Developer

BkSoft-br

Jan 2025 - Aug 2025 (7 months)

Built a cross-platform Flutter/Dart mobile app consuming internal RESTful APIs for Android and iOS. Performed data modeling with MySQL and PostgreSQL, and developed reusable Vue.js/Angular components in a microservices architecture.

Flutter Dart REST APIs MySQL PostgreSQL Data Modeling Vue.Js Angular Microservices

Senior Software Developer

Log Lab

Jun 2024 - Oct 2024 (4 months)

Engineered logistics solutions in PHP with Laravel, MySQL, and PostgreSQL within a scalable microservices architecture. Developed RESTful APIs for automating complex logistics processes with asynchronous processing, including integration testing and production bug monitoring.

PHP Laravel MySQL PostgreSQL Microservices REST APIs Asynchronous Processing Integration Testing Monitoring

Senior Software Developer

Pulsati

Feb 2022 - Mar 2024 (2 years 1 month)

Implemented secure RESTful APIs with authentication, authorization, and data protection, applying SOLID principles and design patterns. Performed database modeling and query optimization, built a Flutter mobile app for electronic medical records, and developed web interfaces with React/Angular.

REST APIs Authentication Authorization Data Protection SOLID Design Patterns MySQL PostgreSQL Flutter Dart React Angular High Availability

Full Stack Developer

Totem TI

Oct 2019 - Feb 2022 (2 years 4 months)

Provided maintenance for internal management systems at the Public Prosecutor's Office of Maranhão and Mato Grosso using PHP with Laravel, JavaScript, and MySQL. Reduced page load time by 60% through JavaScript optimizations and SQL query tuning.

PHP Laravel JavaScript MySQL SQL Tuning Performance Optimization

Web Developer

WEEK Agência Digital

Sep 2014 - Feb 2019 (4 years 5 months)

Delivered over 100 web projects and e-commerce solutions in PHP and JavaScript, focusing on security, performance, and best practices. Created RESTful APIs for third-party integration and implemented responsive frontend solutions that increased conversion rates by 25%.

PHP JavaScript REST APIs Ecommerce Web Security Performance Responsive Design Data Modeling