Open to opportunities

John Fontalvo

@rnjohn

Message

I am a software engineer focused on backend systems, cloud infrastructure, and observability.

Germany

Message

What I'm looking for

I seek backend or cloud engineering roles where I can improve observability, scale microservices, and lead reliable data transfers. I value collaborative teams, strong engineering practices, and opportunities to learn while delivering measurable cost and performance improvements.

I am a software engineer with experience building backend systems and cloud-native microservices for both startups and large enterprises. I specialize in designing reliable data flows and improving operational observability.

At Microsoft I worked on Load Balancing and monitoring mailboxes, improving the drain process and freeing 50+ petabytes of unused space, which reduced costs and increased reliability. At Jüsto I contributed to Reception & Transfers, improved product reception APIs, implemented cross-microservice notifications, and maintained service health through Grafana and Kibana.

I am pragmatic and metrics-driven, comfortable across TypeScript/JavaScript, C#, Node.js, React, Docker, Kubernetes and major cloud services. I prioritize clean engineering, observability, and collaborative problem solving to deliver measurable impact.

Experience

Work history, roles, and key accomplishments

Software Developer

Horbath Technologies

Jun 2020 - Mar 2022 (1 year 9 months)

Led development of the user-creation feature and backend for a seller mobile app; implemented a subscription payment feature integrated with monthly gas billing and co-led the backend migration from Ruby on Rails to Node.js.