Rafael – Node.js, JavaScript, Nest.js

Generative AI platform and enterprise backend for global retail operations. Internal teams use AI agents for strategic decisions, while high-throughput services keep worldwide retail workflows under a second of latency.

Architected and shipped AI agents with Python, LangChain, and LangGraph on AWS Bedrock for internal strategic decisions.

Built high-throughput NestJS and Node.js microservices for global retail operations.

Ran a Databricks lakehouse with DynamoDB and PostgreSQL.

Automated Kubernetes on EKS with Terraform and Jenkins.

Instrumented OpenTelemetry, Grafana, and Istio to catch system issues and model drift early.

Tuned Amazon SQS and SNS, and stored credentials in AWS Secrets Manager.

Enterprise systems for refugee care, Security Council meetings, and vaccination records. Built with NestJS and Angular on the MEAN stack, and designed to handle sensitive data across countries.

Defined the architecture for IRHIS, the medical appointment system for a refugee center.

Shipped ISCAD+ to organize Security Council meetings.

Built CoWin, the vaccination control system used in India.

Delivered the NestJS backends and Angular frontends behind those systems.

KYC platform for B2B transactions across the EU. Large companies use it to verify identity before they do business with each other.

Led a multi-disciplinary team and defined how the services communicate.

Set the cloud architecture on Node.js and GCP, including Kubernetes and Istio.

Shipped Node.js APIs, CI/CD, unit and end-to-end tests, and Terraform.

Wrote the technical documentation, onboarded engineers, and ran workshops that kept delivery on target.

Internal platform for pharmaceutical manufacturing. It tracks factory operations, contracts, HR, and drug recipes.

Built Node.js and TypeScript APIs on SQL Server, MongoDB, and Redis.

Defined the architecture and deployed it on Azure with Jenkins, Docker, and Kubernetes.

Wrote unit tests, reviewed the codebase, and onboarded engineers.

Hospitality platform that brings a hotel's operational data into one place.

Built Node.js APIs on Cassandra and MongoDB.

Shipped a cross-platform desktop app with Electron.

Owned the largest integration with an external provider and set up the Jenkins pipelines.

Sales system for electronic cigarettes, used across locations around the world.

Built and maintained the application in PHP and Laravel.

Developed Node.js services alongside it.

Maintained the SAP OpenUI5 interface.