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LEONARDO
STUART

Building scalable systems at the intersection of AI and infrastructure.

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01 — About
LS

I'm a software engineer based in Belo Horizonte, Brazil, specializing in AI systems, backend infrastructure, and full-stack development. I'm currently pursuing a Computer Science degree at PUC Minas while running two simultaneous internships — building production-grade AI agents and automation systems.

Users Impacted1,000+
Year of Experience1+
02 — Experience

Software Engineering Intern

dti Digital
Sep 2025 — Present · Belo Horizonte, MG
  • ◆Reduced MCP Server context token consumption by 98% implementing MCP Optimizer, cutting API costs and improving chatbot response latency
  • ◆Architected and migrated FastAPI chatbot infrastructure from legacy routing to Model Context Protocol (MCP) using JSON-RPC, ensuring scalability for production AI agent systems
  • ◆Delivered end-to-end features from design to deployment — covering API integration, MCP tooling, and production testing

AI Engineering Intern

Magic Mango
Dec 2025 — Present · São Paulo, SP
  • ◆Automated lead generation and sales prospecting workflows using n8n and Python/Go scripts, reducing manual outreach time by 90%
  • ◆Built data aggregation pipelines to generate competitive intelligence reports, helping prospects benchmark against market alternatives

Backend Developer

PUC COMP — Junior Company
May 2025 — Sep 2025 · Belo Horizonte, MG
  • ◆Developed robust microservices with Java Spring Boot for real client projects, focusing on scalable class architecture and enterprise-grade solutions
  • ◆Worked in a cross-functional team to scope, estimate, and document technical requirements for external client deliverables
03 — Selected Work

Selected Work

monity.preview

Monity

Founder & Full-Stack Developer
100+ users
Active Users

AI-powered personal finance platform with intelligent transaction categorization, collaborative expense splitting, real-time insights, and a companion mobile app. Scaled to 100+ users.

↑ 80% better categorization accuracy vs. manual
ReactReact NativeNode.jsPostgreSQLSupabaseMLAWS
algoflow.preview

AlgoFlow

Founder & Solo Developer
200+
Users

Interactive algorithm visualization platform with frame-by-frame playback, 25+ algorithms across sorting, searching, graph traversal, and dynamic programming, with synchronized pseudocode highlighting.

↑ Open source under Apache 2.0 — covers 6 CS categories: sorting, searching, graph traversal, DP, and more
Next.jsTypeScriptFramer MotionRechartsTailwind CSS
postable.preview

Postable

Co-founder & Product Engineer
SMB
Target Market

SaaS platform for Brazilian SMBs to manage and AI-generate social media content. Analyzes local trends, maps competitors, and publishes ready-to-use posts across networks. Built with Go backend and Next.js frontend.

↑ Production-ready: payments, auth, storage, automated publishing, and test coverage
Next.jsGoPostgreSQLStripeSupabaseDockerAI
sofia.preview

sofIA

Co-founder & AI/Backend Engineer
90%
Checkout Drop Reduction

Multi-agent AI payment platform for WhatsApp using Google's AP2 (Agent Payments Protocol). Handles PIX, boleto, and credit card payments through natural conversation with Gemini 2.5 Flash.

↑ Eliminates app installs and checkout forms — payments happen entirely inside a WhatsApp conversation
PythonFastAPIGoogle ADKGemini 2.5Node.jsPostgreSQLDocker
04 — Tech Stack
// languages
PythonTypeScriptJavaScriptGoJavaC#SQL
// backend
FastAPINode.jsNestJSExpressSpring BootGraphQLREST APIsJSON-RPC
// frontend
ReactNext.jsAngularTailwind CSSFramer Motion
// infra & tools
AWS (S3, CloudFront)DockerGitHub ActionsCI/CDRedisPostgreSQLMySQL
// ai & ml
MCP ProtocolGemini AIGoogle ADKn8nMachine LearningLLM Integration
05 — Recognition
🥇
Best Software Development Work
1st Place · August 2025
🥉
3rd Hackathon Unifecaf
3rd Place · June 2025
06 — Contact

Let's build something.

Open to freelance projects, collaborations, and full-time opportunities.

Send an email
GitHubLinkedInleostuart05@gmail.com
© 2026 Leonardo Stuart