I will develop, refactor, and optimiza scalable nodejs backend apis

G
garaujo1997
G
garaujo1997
Guilherme S
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develop, refactor, and optimiza scalable nodejs backend apis
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develop, refactor, and optimiza scalable nodejs backend apis

Over deze dienst

Are you struggling with slow API response times, backend bugs, or chaotic codebase architecture? 


With 9 years of professional software engineering experience, I design, build, refactor, and optimize scalable Node.js backend systems and RESTful APIs built for production.


What I can do for you:

Fix backend bugs, memory leaks, and unhandled async exceptions

Optimize slow database queries (SQL & NoSQL) and API endpoints

Refactor legacy Node.js/Express/TypeScript code using Clean Architecture & Repository Pattern

Build production-ready, highly scalable Node.js REST APIs from scratch

Setup secure authentication (JWT, OAuth2), rate limiting, and connection pooling

Containerize your application with Docker and set up CI/CD pipelines


Why choose my services?

- Senior Engineering Quality: Clean, maintainable, and fully documented code

- Asynchronous Efficiency: Fast, transparent, and text-based communication

- Enterprise Experience: Microservices, horizontal scaling, and DevOps best practices


Please message me with your project requirements before placing an order so we can select the ideal package!

  • Expertise

    • Algoritmen en gegevensstructuren
    • Debuggen
    • Prestaties
    • Beveiliging
    • Design

  • Programmeertaal

    • TypeScript

  • Frontend-framework

    • Bootstrap
    • Flutter
    • Nuxt.js
    • Vue.js
    • Quasar

  • Backend-framework

    • Express.js
    • Fastify
    • NestJS
    • Node.js
    • AdonisJS

Maak kennis met Guilherme S

Guilherme S

Tech Lead Backend Developer

  • Afkomstig uitBrazilië
  • Lid sindsjun 2025

  • Talen

    Portugees, Engels
I am a fullstack developer passionate about technology and innovation, with consolidated expertise in backend development using Node.js and .NET. I have extensive experience building robust software architectures, applying development best practices, and designing high-performance distributed systems. While my primary focus is backend, I also possess broad experience with Vue.js, allowing me to deliver end-to-end solutions for challenging projects in capital markets, digital wallets, and healthcare.

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