João Pedro Reis De Mello

Same responsibilities as the previous role; promoted due to high-impact delivery and proven reliability within the company and the team.

Technical leadership within one of Brazil’s largest retail ecosystems (Atacadão).

• Project Leadership: Spearheaded the end-to-end backend development for the Atacadão Offers Module, a mission-critical system handling 1M+ active users and 8M daily requests with 99.9% reliability.
• Architecture & Scalability: Architected a resilient infrastructure using Node.js/TypeScript and GCP, implementing Pub/Sub for event-driven processing and Cloud Scheduler for complex task automation.
• Performance Optimization: Leveraged Redis for high-speed caching and PostgreSQL for data integrity, ensuring seamless execution for over 70k daily offer activations.

Tech Stack: Node.js, TypeScript, GCP, Redis, PostgreSQL, Pub/Sub.

Technical management of high-growth projects and leadership of multidisciplinary teams.

• Technical Ownership: Acted as the technical lead for two high-growth projects, overseeing the onboarding of 5,000+ new users weekly and bridging communication between 20+ professionals and stakeholders.
• System Orchestration: Designed and maintained a robust microservices ecosystem (40+ Node.js services) integrated with RabbitMQ and Kafka for high-availability messaging.
• Operational Excellence: Drove successive revenue records by ensuring stable deployments and implementing proactive monitoring strategies using Grafana, AWS, and Docker.

Tech Stack: Node.js, MongoDB, RabbitMQ, Kafka, AWS, Docker, Grafana, Jest.

Middleware system development and maintenance of distributed architectures.

• End-to-End Development: Architected a mission-critical middleware from the ground up to integrate proprietary chatbots with client-side infrastructure via a 10+ service microservices architecture.
• Ecosystem Maintenance: Provided technical ownership for a high-stakes environment consisting of 30+ distributed services (APIs/Consumers) for key enterprise accounts.
• Reliability & Testing: Guaranteed system stability by implementing a robust testing suite with 300+ unit and integration tests (Jest) and managing complex asynchronous workflows.

Tech Stack: Node.js, MongoDB, RabbitMQ, Kafka, AWS S3, Docker, Grafana.

Modernization of health systems and optimization of developer and user experience.

• System Enhancement: Contributed to the development and debugging of the core health system for Amparo Saúde (+2,000 employees), focusing on scalability and patient-facing platforms.
• Efficiency Impact: Successfully decreased appointment scheduling time by 50% through backend optimizations and process restructuring.
• Refactoring & DX: Restructured 200+ files to align with industry best practices and integrated Vite into the frontend, significantly enhancing the developer experience (DX).
• Quality Engineering: Implemented Cypress E2E testing on the core system to ensure the reliability of critical healthcare journeys.

Tech Stack: Node.js, PostgreSQL, VueJS