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João Vitor Paul

@joovitorpaul

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Senior Software Engineer at Hotmart building an Internal Developer Platform with AI-assisted autonomous deployments.

Brazil

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At Hotmart, I’m building an Internal Developer Platform that combines a static file upload interface for application deployments with MCP integration, enabling AI agents to execute deployment workflows autonomously. I also owned frontend delivery for checkout initiatives and introduced AI-assisted prompt templates that reduced development effort by approximately 80%.

Earlier at Hotmart, I contributed to Java and Spring Boot microservices for checkout and payment processing, and improved checkout flows through payment integrations, A/B testing, and automated tests. At ProJuris and Neogrid, I developed and maintained REST APIs and microservices, supported tax issuance products, and worked on customer integrations.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Hotmart

Jun 2024 - Present (2 years 4 months)

- Currently building an Internal Developer Platform (IDP) featuring a static file upload interface for app deployments, alongside MCP (Model Context Protocol) integration that empowers AI agents to execute deployments autonomously. This enables non-technical team members to ship applications securely following company infrastructure standards in minutes.

- Owned end-to-end delivery of frontend in

Software Engineer

Hotmart

Nov 2021 - Jul 2024 (2 years 8 months)

Backend:
- Worked with Java 21 and Spring Boot 3 in microservices architectures, contributing to services responsible for offer information delivery to the checkout frontend and payment processing for multiple localized payment methods.

Frontend:
- Improved and maintained checkout flows, including new payment method integrations and UX enhancements.
- Ran A/B tests to improve UI and conversion-re

Software Engineer

ProJuris

Sep 2019 - Nov 2021 (2 years 2 months)

- Served as an interim Tech Lead, coordinating delivery and supporting the team in removing blockers and unblocking execution.
- Maintained AWS-based microservices with CI/CD practices to ensure availability, scalability, and resilience.
- Developed and maintained REST APIs with Java 11 and Spring Boot 2 in a microservices architecture.
- Fixed security issues identified via penetration testing, i

Software Engineer

Neogrid

Jun 2015 - Sep 2019 (4 years 3 months)

- Built and supported tax issuance products, including legacy applications (Java 8), integrating electronic invoice providers via SOAP and REST/web services.