João Carrilho

I am a full-stack software engineer focused on building reliable backend services and real-time frontends for payments and invoicing systems. I combine Node.js (NestJS) and Python (FastAPI) expertise with React to deliver end-to-end solutions.

At Rauva I built and scaled Python backend services handling SEPA credit transfers and implemented a PostgreSQL billing system that automated recurring charges and reduced manual accounting by ~40%. I also implemented KYB workflows and optimized database queries, improving response times by ~35%.

I deliver production-quality frontends, including live data streaming dashboards for operations, and drive reliability through TDD and monitoring—achieving ~85% test coverage with Jest and Pytest. I regularly mentor junior engineers and lead system design discussions around payments, invoicing and compliance.

I seek to apply my skills in API design, microservices, and cloud deployment to impactful product work, prioritizing clean architecture, measurable reliability improvements, and collaborative engineering practices.