Marcos Rosas
Available for high-impact teams

Senior Full-Stack Engineer

Engineering from protocol to product.

I'm Marcos Rosas. I build secure, scalable full-stack systems with a foundation in computer networking and a track record across product teams, enterprise software, and open source.

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.NET 8 / 9 / 10Next.jsTypescriptWebAssemblySQL / PostgresSystem & Networking
01 / Featured work

Systems designed for trust.

Mode

Private files. Public internet. Zero compromise.

A secure file-sharing MVP using browser-side WebAssembly encryption, keeping sensitive plaintext off the server by design.

Next.jsWebAssemblyClient-side crypto
eeva

A connected backend for life and home.

Backend ownership across three .Net generations, mobile collaboration, data integrations, code-based migrations, caching, and AI-facing interfaces.

.NET 8-10React NativeMySQL
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02 / Capabilities

Built wide. Thinking deep.

01

Backend & Systems

  • C# / .NET
  • ASP.NET Core
  • EF Core
  • REST APIs
  • WebAssembly
  • Caching
02

Frontend & Mobile

  • Next.js
  • React
  • React Native
  • Typescript
  • Redux
  • Accessible UI
03

Infrastructure & Networking

  • PostgreSQL
  • Supabase
  • Network Architecture
  • Security
  • CI/CD
  • Cloud Integrations

Have a hard problem?

Let's make the complex dependable.

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