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Diogo Bettin Dutra dos Reis

@bettin

Full-Stack Developer at Tecnoon who eliminated duplicate invoice cases in production with concurrency control and idempotency.

Brazil

Message

At Tecnoon, I diagnosed a race condition in a critical billing operation and implemented concurrency control with idempotency, eliminating duplicate invoice cases in production. I also deployed applications on AWS EC2 with Nginx and set up CI/CD pipelines with GitHub Actions.

On my e-commerce platform project, I developed a storefront and admin panel with checkout, payment, and shipping integrations. After identifying that image egress via Supabase Storage was consuming the full quota, I migrated to Cloudinary CDN and reduced operational cost to $0.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Developer

Current

Tecnoon

Feb 2026 - Present (8 months)

Diagnosed a race condition in a critical billing operation and implemented concurrency control with idempotency, eliminating 100% of duplicate invoice cases in production. Deployed applications on AWS EC2 with Nginx as a reverse proxy, ensuring high availability and correct routing across multiple services.

EC2 Nginx GitHub Actions CI CD Logging Concurrency Control Idempotency

Full-Stack Developer

E-commerce Platform (Project)

Sep 2025 - Jan 2026 (4 months)

Developed a full-stack e-commerce platform with a modern storefront (Next.js + React), admin panel, catalog with variants, search, reviews, wishlist, persistent cart, and theme toggle. Implemented multi-step checkout with CEP validation, real-time shipping calculation, atomic stock validation, and integration with Mercado Pago and Stripe.

Next.js React TypeScript JavaScript Supabase Stripe Mercado Pago JWT Bcrypt Rate limiting Zod Cloudinary Outbox Pattern Background Jobs Event Logging

Full-Stack Developer

Emito Nota

May 2025 - Jun 2025 (1 month)

Contributed to a CRM for small businesses covering inventory, product, and employee management, with clients reporting a 30% improvement in operational efficiency. Integrated third-party services for electronic invoice issuance (NF-e) in compliance with SEFAZ and developed an AI-powered business analytics module.

CRM NFe SEFAZ AI Analytics Unit Testing Integration Testing

Education

Degrees, certifications, and relevant coursework

Faculdade de Apucarana (FAP)

Bachelor's degree, Information Systems

2024 -

Pursuing a Bachelor's degree in Information Systems, covering data structures, algorithms, database fundamentals, object-oriented programming, and more.