I will develop, fix, or optimize your backend API and microservices

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Marcos E

About this gig

Need a reliable, scalable, and clean backend?

I am a Senior Backend Engineer with 15+ years of experience building high-traffic distributed systems (Mercado Libre, ViacomCBS).


I specialize in Go, Python, Java, and TypeScript, focusing on microservices, REST/GraphQL APIs, and data pipelines.


What I can do for you:

  • Develop new REST or GraphQL APIs from scratch
  • Build or refactor Go/Python/Java/TypeScript microservices
  • Optimize database queries (PostgreSQL, MongoDB) and system performance
  • Debug complex production issues and write unit/integration tests


Why choose me?

  • 15+ years of professional backend experience
  • Clean code practices (TDD, CI/CD, Domain-Driven Design, etc..)
  • Clear, professional communication and on-time delivery


Please message me before placing an order so we can discuss your project scope!


NOTES:

  • Hosting fees, third-party API subscriptions, and major feature additions are not included in this price
  • I provide 5 days of free support for any bugs related to the delivered code.

Get to know Marcos E

Marcos E

Senior Software Engineer

  • FromArgentina
  • Member sinceJun 2026
  • Languages

    English, Spanish
I am a software engineer with more than 15 years of experience across large-scale industries such as e-commerce and media. My career has evolved from working with .NET, Node.js, and Java to specializing in Golang for high-availability systems. Currently, I develop critical microservices for Search and Post-Purchase domains at Mercado Libre, leveraging AWS and GCP infrastructure.