André Cavalcante · Fullstack AI Engineer

Currently

Shipping production LLM systems on top of solid backend foundations.

Event-driven RAG pipelines, MCP integrations, and multi-tenant SaaS backends at DROZ. Cut RAG infrastructure cost by ~50% through orchestration and retrieval re-engineering.

5+ years building Node.js, TypeScript, AWS, React, and applied AI in production. Mechatronics Engineering at USP, AWS Certified.

View work

01 /

About

I'm a Fullstack AI Engineer with 5+ years building production systems where AI is the feature, not the demo. Backend-leaning by instinct, fullstack by delivery.

My work lives at the intersection of distributed backends and applied AI: event-driven architectures on AWS, multi-tenant SaaS, and LLM systems shipped to real users. Currently at DROZ, where I designed the event-driven RAG pipeline and built the initial MCP layer for the product.

Background in Mechatronics Engineering at USP. I treat AI like any other engineering surface: trade-offs, evaluations, cost ceilings, and observability. I'm pushing toward senior backend / AI engineering, with a focus on international remote roles.

02 /

Experience

2022 Present
Fullstack Software Engineer · AI Focus·DROZ
- Designed and shipped a production event-driven RAG pipeline supporting multi-LLM conversational workflows over tenant knowledge bases. Cut RAG infrastructure cost by ~50% through orchestration and retrieval re-engineering.
- Built the initial product MCP layer enabling structured access to platform capabilities, foundation for context-aware AI-assisted workflows.
- Designed an internal AI engineering workspace unifying domain context, reusable skills, and MCP tooling across teams.
- Shipped embedding-based NLP classification (cosine similarity), LLM intent prediction with structured Zod outputs, and image metadata via vision models in production.
- Maintained AWS Lambda workloads and event-driven messaging integrating Zendesk, ReclameAqui, proprietary chat systems, and CS tools.
NestJSTypeScriptLangChainOpenAITypesenseMCPGraphQLPostgreSQLDynamoDBAWSCDK
Jan 2025 Mar 2025
Fullstack Software Engineer · Contract · ASAP Codes
- Fixed-scope contract building backend services in NestJS for a white-label fintech platform.
- Delivered React / Next.js frontend features wired to MongoDB-backed flows.
NestJSTypeScriptReactNext.jsMongoDB
2021 2022
Junior Fullstack Software Engineer · DROZ
- Resolved severe MySQL contention and CPU saturation through token caching and TTL strategies. Cut peak request wait times from hours to seconds.
- Contributed to a low-code cloud platform for external API integrations on AWS using Serverless Framework and clean architecture.
Node.jsTypeScriptNestJSReactMySQLAWSServerless Framework

03 /

Selected Work

Cloud Annotation Library

Problem: Students and professors at USP had no shared way to publish and discover annotations across courses and campuses.
Approach: Designed and built end-to-end: AWS S3 for image storage, Node.js + Express backend, Angular 2+ frontend, MongoDB Atlas. Authentication scoped to USP accounts.
Impact: Functional bachelor thesis platform; served as the entry point into cloud-native fullstack engineering.

Node.jsExpressAngularMongoDBAWS S3

Repository

[ More case studies coming soon. ]

04 /

Education

2014 2021
B.Sc. Mechatronics Engineering · University of São Paulo (USP)
- Bachelor thesis: Cloud Annotation Library, a platform for sharing academic annotations using MEAN stack and AWS S3.
- Multidisciplinary engineering foundation: control systems, embedded systems, software, signal processing.
MEANAWS S3AngularNode.js

05 /

Stack

AI / LLM

RAG
MCP
LangChain
OpenAI
Gemini
Embeddings
Typesense
Zod structured outputs
Vision models

Backend

Node.js
TypeScript
NestJS
GraphQL
REST
Python
Express

Data

PostgreSQL
DynamoDB
MongoDB
MySQL
Redis

Cloud / Infra

AWS Lambda
API Gateway
SQS
SNS
S3
EC2
CloudFormation
CDK
Docker
Serverless Framework

Frontend

React
Next.js

Architecture

Event-driven
Multi-tenant SaaS
Distributed systems
Serverless
Microservices

Stack reflects what I currently ship in production, not a wishlist. Comfortable picking the right tool when a project demands it.

06 /

Trusted Network

People I'd hire without thinking twice.

Engineering

EugenioBonadio

Software Engineering Manager

Engineering Manager with a strong technical background. Leads complex projects balancing quality, planning, and individual growth via 1:1s and mentorship.

FrancisTarganski

Software Engineer · Fullstack, Frontend-leaning

Frontend-leaning fullstack engineer, 5+ years across React, Next.js, Node, and conversational AI. Architecture background sharpens UI craft.

GabrielBaldino

Software Engineer · Fullstack, Backend-leaning

Backend engineer specialized in Node.js, NestJS, and AWS serverless. 3+ years leading DrozChat, a multi-tenant platform with 100+ enterprise clients.

TiagoVeronesi

Software Engineer · Fullstack, Backend-leaning

Backend engineer with Node.js, NestJS, AWS, and PHP. Built large-scale marketplace and payment integrations across e-commerce and CRM.

Product & Design

MatheusOliveira

Senior Product Manager

Senior Product Manager, 7+ years scaling SaaS across conversational AI, fintech, and enterprise. 0→1 launches, PCI gateways, data-informed decisions.

MayanaPirovane

Senior Product Manager

Specialist Product Manager, 6 years across high-scale critical systems. Currently leads OMS at Grupo Boticário, after product leadership at PicPay.

ThomasGuimaro

Senior Product Designer

Senior Product Designer, 8+ years of end-to-end product design across EdTech, museums, and AI-powered B2B. MBA in Neuroscience and Consumer Behavior.

ViniciosNogueira

Product Owner

Product-oriented Service Delivery lead, 10+ years coordinating implementation projects end-to-end across support, dev, and customer teams.