Eliseo Sanz

Desarrollador Backend, tengo experiencia en ecommerce y advertising (ad tech, ads).

Estudiante avanzado de ingeniería en informática, tengo mas de 4 años de experiencia en la industria, en corporación grande Mercado libre, y Startups. Entiendo la excelencia y orden en la entrega a producción y el dinamismo de cumplir con los deadlines.

Backend Developer (Go / Java) at Mercado Libre (2024-12 – Present)

• Built from scratch and currently maintain a marketplace orchestration platform that manages the full sales lifecycle on Mercado Libre: stock management, order processing, invoice generation, deliveries, and returns/cancellations.
• Designed the system following Clean Architecture and DDD, enabling independent evolution of each business domain (stock, orders, logistics) without cross-domain coupling.
• Implemented a custom Circuit Breaker and async event pipelines via AWS SQS to handle peak-traffic spikes and ensure resilience across the order flow.
• Achieved a 70% Cache Hit Ratio with Redis while processing millions of async event notifications — purchase orders, cancellations, stock changes, and shipping updates — without hitting upstream services on every message.
• Added full observability with Prometheus metrics, structured logging, and auto-generated Swagger / OpenAPI docs for the internal team.
• Integrated a RAG pipeline with custom MCP Servers and N8N workflows to power internal developer tooling and accelerate on-call diagnostics.

Backend Developer at Sirius Software (2024-07 – 2024-12)

• Architected and deployed backend solutions for international clients including US-based startup Wag and Emergencias Salud, working in direct collaboration with engineering teams in the United States and India.
• Reduced data-processing costs by 40% architecting serverless pipelines with AWS Lambda and Python, incorporating chunking and encryption strategies that met enterprise compliance requirements.
• Designed robust database schemas with Prisma ORM + PostgreSQL, enabling faster feature delivery and reducing data-model–related bugs.
• Managed VPS infrastructure (DNS, Nginx, SSH) and automated deployments via GitHub Actions, improving release frequency with zero-downtime deploys.

Full Stack Developer & Researcher at UNLaM Tech Research Center (2023-07 – 2024-01)

• Developed a CONICET-funded content repository for educators, focused on providing accessible study material for students with disabilities.
• Modeled and optimized relational data structures, significantly improving system efficiency.
• Translated business needs into technical specifications through direct elicitation.
• Implemented functional and responsive user interfaces using Angular UI mockups.
• Managed continuous deployment and preventive maintenance on our own VPS infrastructure.

Full Stack Developer at Penta Mont (2022-01 – 2023-12)

• Developed a comprehensive property management platform from scratch, optimizing collection times and organizing finances.
• Implemented an expense, tax, rent, and tenant management system.
• Automated generation of receipts and financial reports, drastically reducing manual workload.
• Created an automatic notification system for payment reminders and deadlines.

B.S. in Software Engineering – Universidad Nacional de La Matanza (UNLaM) (2022 – 2027)