Nicolás Cancino

Backend engineering on production systems at large-scale retail. Led the migration of services to Google Cloud (GKE, Pub/Sub, Cloud SQL). Designed event-driven ingestion via Pub/Sub. Built streaming/batch data pipelines with Apache Beam / Dataflow (Java) on Kubernetes. Worked across Go and Java microservices with a focus on reliability, observability, and clean architecture.

Led the from-scratch rebuild of a production service using hexagonal architecture in Go, plus a custom migration tool to transform and move records distributed across multiple tenants from Firestore to PostgreSQL — enabling complex filtering not feasible in the previous NoSQL design. Drove adoption of code-first API documentation by introducing OpenAPI/Swagger generation directly from Go code via swaggo. Refactored multiple Go microservices to hexagonal architecture, decoupling domain logic from infrastructure. Implemented end-to-end request tracing via context.Context propagation and structured logging with zerolog.

Designed and built backend microservices and REST APIs in Node.js for a large-scale e-commerce platform, supporting production retail traffic. Owned the full microservice lifecycle: API design, implementation, deployment, and observability.

Built proof-of-concept solutions for LATAM corporate clients, including a 'Things to do' recommendation chatbot integrating Google Maps and DialogFlow.

Developed Java/Spring microservices for a corporate internal application along with the corresponding Angular frontends consuming those services.

Ambrocito Training

Online platform for selling and streaming calisthenics video courses. Course catalog, lesson player with HMAC-protected HLS streaming, MercadoPago checkout, JWT auth with Google sign-in linking, transactional email.

DaniG Yoga

Online platform for selling and streaming yoga video courses. Hexagonal Go backend, Astro PWA frontend with hls.js video player, full deploy stack on Cloud Run + Cloudflare Pages + Supabase.