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Fractional Ruby on Rails developer for fast moving teams.

I'm Wagner Matos, a UK based software engineer helping startups, agencies, and SaaS companies build and maintain reliable Rails applications. Available for ongoing retainer or fractional engagements across the UK, US, and Europe.

You don’t always need to hire another engineer permanently. I can join your team part-time or on retainer to ship features, refactor legacy code, or keep your app stable and moving forward.

I integrate quickly, communicate clearly, and respect your team’s process. My goal is to make your life easier, whether that’s reviewing PRs, leading a small rebuild, or helping you plan technical decisions.

How I can help

  • Fractional Rails Development - Ongoing part-time engineering support for your product.
  • Technical Consulting - Architecture reviews, code audits, and mentoring.
  • Feature Development - Design and build new functionality with clean, maintainable code.
  • AI & Machine Learning Integration Add intelligent features to your apps: recommendation systems, natural language processing and AI-driven automation.
  • Maintenance & Support - Keep your app secure, up-to-date, and performant.
Get in touch

Rails 8 + TailwindCSS: The Default Frontend Stack Done Right

Rails has supported TailwindCSS via the --css tailwind flag since Rails 7, but it's with Rails 8 that the pairing has really hit its stride. By the time Rails 8.1.2 arrived in January 2026, the combination had become - in my experience at least - ...

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Recent Work

Alertive I built a serverless webhook service that delivers real-time conversation events to each trust's own systems, handling encryption, authentication, concurrent delivery, and automatic retries.
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Johnson & Johnson During the European Academy of Dermatology and Venereology (EADV) 2025 Conference, Johnson & Johnson Medical aimed to better understand how healthcare professionals interacted with their multi-zone exhibition booth. Traditional tracking methods lacked real-time visibility and were often dependent on unreliable event Wi-Fi and cloud connectivity.
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Johnson & Johnson During the European Academy of Dermatology and Venereology (EADV) 2025 Conference, Johnson & Johnson Medical aimed to better understand how healthcare professionals interacted with their multi-zone exhibition booth, so they’ve asked me to come with a solution that would provide real-time visibility while operating independently of Wi-Fi or cloud connectivity
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CoverageBook As part of CoverageBook’s Coverage Impact team, I helped improving the CSV ingestion and analytics pipeline, transforming an unreliable import process into a robust, self-healing data subsystem