+++
title = "Holistic Tech Services to help your team build."
description = "Freelance Software Engineer | iOS, macOS, Web & Backend Development | DevOps & Engineering Leadership Consulting"
+++
  <section id="introduction">
    {% window(title="Welcome.") %}
        <img src="/img/selfie.png" alt="A pixel-art portrait of Rubén doing a peace sign and sticking his tongue out" />
        <p>Howdy! I'm Rubén Beltrán del Río, a freelance software engineer based in Berlin. I build iOS and macOS apps, web applications, backend services, and help teams with technical leadership. Looking for some help with your project? I might be able to help!</p>
    {% end %}
  </section>
  <section id="services">
    <section>
      <h2>I can help you build.</h2>
      <ul>
        <li><strong>Fast, accessible websites</strong> with SEO optimization and cutting edge web development best practices.</li>
        <li><strong>Native iOS, iPadOS, and macOS apps</strong> using Swift, Catalyst, SwiftUI, or UIKit.</li>
        <li><strong>Scalable backend services</strong> with great observability, clear documentation, and cloude-native infrastructure.</li>
        <li><strong>End-to-end data pipelines</strong> from tracking planning, to <abbr title="Extract-Load-Transform">ETL</abbr> workflows that deliver accurate and actionable analytics insights.</li>
        <li><strong>Infrastructure as code</strong> that can orchestrate and manage all your services on AWS, Scaleway, Azure or any cloud provider.</li>
      </ul>
    </section>
    <section>
      <h2>Optimize and improve.</h2>
      <ul>
        <li><strong>Supply chain analysis</strong> to reduce risk from dependencies across different languages and packaging ecosystems.</li>
        <li><strong><abbr title="Continuous Integration">CI</abbr> &amp; <abbr title="Continuous Delivery">CD</abbr> automation</strong> to improve code quality, testing, and deployment.</li>
        <li><strong>Cloud cost optimization</strong> through right-sizing, architecture improvements, and spending analysis for AWS, GCP, Azure and other cloud providers.</li>
        <li><strong><abbr title="Large Language Models">LLM</abbr> integration &amp; optimization</strong> using custom tooling, prompt engineering, and Model Context Protocol (MCP) servers.</li>
      </ul>
    </section>
    <section>
      <h2>Or help your team go fast.</h2>
      <ul>
        <li><strong>AI transformation</strong>. Teach your organization how to work with AI, and build the right tools to support it.</li>
        <li><strong>Upskill your team</strong>, and bring them up to speed with new technologies, architecture patterns or processes.</li>
        <li><strong>Build a product engineering mindset</strong> and ehelp your product and engineering teams speak the same language, and work closer together.</li>
        <li><strong>Experimentation mindset</strong> to enable your team to design, execute, and interpret A/B tests and multivariate experiments.</li>
        <li><strong>Systems analysis</strong> to streamline your operations by understanding how your team, resources and processes come together, finding chokepoints, and reducing waste.</li>
      </ul>
    </section>
  </section>
  <section id="skills">
    <section class="textured">
    <h2>Ain't that right!</h2>
    <p>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:</p>
    <ul>
      <li><strong>Languages:</strong> JavaScript, Rust, Ruby, Python, PHP, Swift, Objective-C.</li>
      <li><strong>Cloud Providers:</strong> AWS, Scaleway, Cloudflare, Google Cloud, Azure.</li>
      <li><strong>CI Systems:</strong> GitHub, Gitlab, CircleCI, TravisCI, Jenkins, Bitrise.</li>
      <li><strong>Database Systems:</strong> PostgreSQL, MySQL/Aurora, Redis, MongoDB, Apache Cassandra, Snowflake.</li>
      <li><strong>Analytics Software:</strong> Google Analytics, Amplitude, PostHog, .</li>
    </ul>
    </section>
    {% window(title="Get in touch.") %}
        <p>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!</p>
        <button><label>Book a call.</label></button>
        <a role="button" href="mailto:hello@work.bdr.sh?subject=Howdy%2C%20I%27d%20like%20to%20work%20with%20you%21&body=Hi%20Rub%C3%A9n%2C%0D%0A%0D%0AI%20saw%20the%20contact%20form%20on%20your%20website%20and%20would%20like%20to%20see%20if%20we%20can%20work%20together%20on%20my%20project%3A%0D%0A%0D%0A%3CTell%20me%20a%20bit%20about%20your%20project%20here%3E%0D%0A%0D%0ABest%2C%0D%0A%3CYour%20Name%3E"><label>Send an e-mail.</label></a>
    {% end %}
  </section>
  <section id="testimonials">
    <section class="textured">
      <h2>But don't take my word for it.</h2>
      <p>Here's what some lovely people have to say about me.</p>
    </section>
  </section>