Hello!

Senior Backend Engineer with 7+ years building and architecting production microservices for fintech and SaaS.

Focused on distributed systems, event-driven workflows, and AWS infrastructure shipping reliable, observable systems under strict SLAs and cost constraints.

Hands-on experience integrating LLM-powered and RAG pipelines into real-time, user-facing workflows.

Gonza Sestopal

Hello!

Senior Backend Engineer with 7+ years building and architecting production microservices for fintech and SaaS.

Focused on distributed systems, event-driven workflows, and AWS infrastructure shipping reliable, observable systems under strict SLAs and cost constraints.

Hands-on experience integrating LLM-powered and RAG pipelines into real-time, user-facing workflows.

Professional Experience

Visito

Visito

Founding Engineer

Built with WebSockets for real-time features, React for the frontend, MongoDB for data storage, and deployed on Azure cloud infrastructure.

Fondea

Fondeadora

Backend Engineer

Built core systems from the ground up, including banking integrations, cloud infrastructure, and engineering processes. Promoted to Tech Lead for the B2B platform, leading the integration of SPEI into internal systems.

Colaboradora

Colaboradora

Software Engineer

We made students' lives easier connecting them to real career opportunities through Algolia, Elasticsearch to mention some integrations.

Projects

Discuss Hub

Discuss Hub

FastAPI + NLP + LLM

LLM-based debate chatbot using Natural Language Inference (NLI) models to evaluate arguments and determine when to concede or defend positions. Built with FastAPI and PostgreSQL.

Restaurant Kopilot

Restaurant Kopilot

LLM + RAG + FastAPI

LLM-powered assistant translating natural language into safe SQL analytics queries. Built with Retrieval-Augmented Generation (RAG) using LangChain to improve response accuracy and relevance.

Price Predictor

Rental Price Predictor

Linear Regression + ML

Uses linear regression to calculate rental prices based on property features. Machine learning model for accurate price predictions.

Problem Solving