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Gabriel Piassetta

@gabrielpiassetta

Senior Backend Engineer at Function Health who built a conversational health agent and cut its LLM context by about 95%.

Brazil

Message

At Function Health, I designed and built a production conversational health agent with LangGraph, including a memory-extraction pipeline and RAG over clinical documents. I also built evaluation pipelines using clinician-reviewed data and reduced LLM context from approximately 720k to 36k tokens while preserving clinically relevant history.

At Passport, I built secure Python integrations with banking APIs and improved payment reliability. Earlier, I built a construction-supply marketplace from scratch at Conaz Soluções Tecnológicas and led a team of 6–10 engineers; today, I’m building Itinera, a conversational platform for travel agencies.

Experience

Work history, roles, and key accomplishments

Senior Software Engineer

Function Health

Jun 2024 - Sep 2026 (2 years 3 months)

Designed and built a production conversational health agent with LangGraph, including memory extraction and RAG over clinical documents. Reduced LLM context size by 95% and implemented event-driven processing with observability.

Python fastAPI LangGraph RAG Pgvector GCP Cloud Run Pub Sub PostgreSQL OpenTelemetry

Senior Software Engineer

Passport

Sep 2022 - Jun 2024 (1 year 9 months)

Built secure Python integrations with banking APIs for automated payments and reconciliation. Improved payment reliability through validation and retry strategies, and led refactoring of legacy integration modules.

Python Banking APIs Payment Processing Integration Refactoring Testing

Senior Software Engineer

Pricemoov

Oct 2020 - Sep 2022 (1 year 11 months)

Developed backend systems and integrations with major eCommerce platforms for a B2B pricing SaaS. Built tooling that automated parts of customer onboarding and reduced manual setup work.

Python Django AWS Kubernetes

Backend Developer

Loadsmart

Jun 2019 - Oct 2020 (1 year 4 months)

Built the customer-facing REST API for shippers to submit loads. Identified and removed CI bottlenecks, reducing pipeline runtime and cost by more than 50%.

Python Django AWS Go Event Driven Architecture REST APIs CI CD

Tech Lead

Conaz Soluções Tecnológicas

Sep 2015 - Jun 2019 (3 years 9 months)

Designed the data model and built the company's main construction-supply marketplace from scratch in Python and Flask, including API-first architecture. Led a team of 6-10 engineers while remaining hands-on.

Python Flask MySQL REST APIs Leadership

Python Developer

Grupo Cloud

Dec 2012 - Sep 2015 (2 years 9 months)

Built the company's core SSO platform in Django and Django REST Framework, introduced production metrics and system-health visibility, and delivered GSuite and customer integrations. Led 6-10 engineers.

Python Django Django REST Framework SSO Metrics Google Workspace