Rubén Beltrán del Río

✷ Holistic tech services ✷

Welcome.
A pixel-art portrait of Rubén doing a peace sign and sticking his tongue out

Howdy! I'm Rubén, a freelance full-stack software engineer based in Berlin. Looking for some help with your project? I might be able to help!

I can help you build.

  • Websites that are fast, accessible and search engine optimized.
  • Native apps for iOS, iPadOS or macOS.
  • Backend Services with great observability, clear documentation, and made to scale.
  • Data Pipelines from tracking planning, to data warehouse extract-load-transform pipelines that give you accurate and actionable information.
  • Infrastructure that can tie all your services, documented as code.

Optimize and improve.

  • Supply chain analysis to reduce risk from dependencies across different packaging ecosystems.
  • Automate code quality and deployment.
  • Reduce cloud cost by optimizing your resource usage, plans and overall architecture.
  • Optimize Large-Language-Model usage by creating custom tooling and Model Context Protocol (MCP) servers.

Or help your team go fast.

  • AI Transformation: Teach your organization how to work with AI, and build the right tools to support it.
  • Upskill Your Team: Bring your team up to speed with new technologies, architecture patterns or processes.
  • Product Engineering Mindset: Bring product and engineering closer together.
  • Experimentation mindset, help your team learn how to design, execute, and interpret experiments.
  • Systems Analysis: Streamline your operations by understanding how your team, resources and processes come together, finding chokepoints, and reducing waste.

Ain't that right!

With over 25 years of experience, I've worked with big and small teams, ad-supported and sales-driven products, bootstrapped startups looking to launch, and established companies looking to scale up. I've worked with all sorts of stacks:

  • Languages: JavaScript, Rust, Ruby, Python, PHP, Swift, Objective-C.
  • Cloud Providers: AWS, Scaleway, Cloudflare, Google Cloud, Azure.
  • CI Systems: GitHub, Gitlab, CircleCI, TravisCI, Jenkins, Bitrise.
  • Database Systems: PostgreSQL, MySQL/Aurora, Redis, MongoDB, Apache Cassandra, Snowflake.
  • Analytics Software: Google Analytics, Amplitude, PostHog, .
Get in touch.

You can book a call to tell me about your project face to face. Or you if you prefer text, you can send me an e-mail!

But don't take my word for it.

Here's what some lovely people have to say about me.