Open to opportunities

João Paulo Nunes Martins

@joaopaulomartins

Message

I build backend applications and AI-integrated chatbots using PHP, Laravel, Node.js, Python, and PostgreSQL.

Brazil

Message

What I'm looking for

I'm looking to build stable, efficient backend solutions while applying my experience in optimization, observability, performance improvements, and IT infrastructure.

I built backend functionality for an OpenAI API-integrated chatbot at Engeplus Empresas, using PHP, Laravel, RAG, prompt engineering, and PostgreSQL to support better user interactions and conversation continuity.

My background spans backend development and IT infrastructure, including Active Directory, Microsoft 365, print servers, network monitoring, corporate servers, and end-user support. I also bring hands-on experience diagnosing and maintaining hardware, systems, and computer networks.

I focus on stable, efficient solutions through application optimization, observability, and performance improvements.

Experience

Work history, roles, and key accomplishments

Backend Developer

Engeplus Empresas

Dec 2023 - Jan 2025 (1 year 1 month)

Collaborated on the development of a chatbot integrated with the OpenAI API, implementing backend functionality in PHP with Laravel and AI techniques such as RAG and prompt engineering. Managed message and response storage in PostgreSQL, enabling future queries and conversation continuity.