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Achievements

Achievement: Pull Sharkx2Achievement: QuickdrawAchievement: YOLO

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MatheusOtenio/README.md

Typing SVG
I’m Matheus Otenio, a backend-focused software engineer who enjoys designing APIs grounded in real business needs and clear system structure. I care about maintainability and automation, and I like turning loosely defined requirements into reliable, well-organized solutions. While my focus is on backend and system design, I’m comfortable contributing to the frontend when it helps deliver a better product.

🖳 Tech Stacks & Tools

Java & Spring Ecosystem

Java Spring Boot Maven

Flyway JUnit Spring Security

TypeScript & Node.js Ecosystem

TypeScript Node.js Express

React Tailwind CSS Prisma Jest

Databases, Infra & Common Tools

PostgreSQL MongoDB

Docker AWS Git

JWT Swagger Postman

𓂃✍︎ GitHub Activity

My Selected Projects
Project & Focus Engineering Decisions
NexusFlow
(Corporate Reimbursement)		 • State Machine implementation ensuring consistency in status transitions.
• Domain Isolation decoupling business rules from infrastructure.
• Secure persistence via versioned migrations.
Aegis
(Financial System)		 • BFF & Batch: Clear separation between real-time orchestration and high-volume processing.
• Idempotency mechanisms to prevent financial duplication.
• Architecture designed for auditability and scale.
McDonald’s Kiosk
(UX & Frontend)		 • Predictable State Management architecture.
• UX-driven design focused on friction reduction and visual hierarchy.
• End-to-end flow simulation (order to confirmation).
3D Contribution Graph

3D Contributions

LinkedIn Portfolio AtCoder Lattes

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  1. nexusflow-reimbursement-system nexusflow-reimbursement-system Public

    Corporate system with an approval workflow (Employee, Manager, and Finance), a state machine with explicit validations, audit trail, and JWT authentication. Developed using Spring Boot 3, PostgreSQ…

    Java 2

  2. aegis-financial-architecture aegis-financial-architecture Public

    Financial system with BFF(Express) & Batch(Sping). Decoupled architecture for real-time orders, automated daily reports with idempotency, and secure manual token validation. Demonstrates scalable b…

    Java 4

  3. mc-donalds-autoatendimento mc-donalds-autoatendimento Public

    McDonald's sales website project instructed by FSW using Next.js, TypeScript, Figma, Prisma, NeonDB, PostgreSQL, and Tailwind CSS.

    TypeScript 12

  4. portfolio-matheus-otenio portfolio-matheus-otenio Public

    This is my portfolio developed with React, Vite, CSS, and JavaScript. The goal of this project is to showcase my skills, projects, and experiences in an interactive and responsive way.

    JavaScript 7