Full-stack Freelancing

I am a full-stack developer, specialized on building SaaS application and translating designs into fast and resilient web sites. I work with modern tools such as Node.js, React, and TypeScript.

I am a product-minded engineer. Most of my carreer has been spent working closely with founders on a wide range of products, going from MVPs to large-scale applications with +1M users. During this time, I have developed many opinions and a passion for contributing on all product development cycles. I take keen interest in the business, UX and user behaviour, and you will often hear me asking "why?".


Here are the things I can help you with:

Custom SaaS Development

I will build you a full-stack SaaS application using modern tools and following the best practices of the industry. I can architect, research, and advise on anything you want to build.

While I can contribute on product discussions, it's essential that you bring a complete design specification of your application from the start.

Code & Architecture Review

Already have a Node.js & React application and want to get an external opinion? I will identify strategic issues that can affect the performance, stability, and maintainability of your app. The result will be a detailed report with actionable points on how to improve your codebase.

Trusted by:


One of my core values in any professional engagement is transparency. The final delivery of a project or service should never feel like a big reveal, even if the result is good. In my experience, frequent check-ins and overcommunicating (effectively) are key factors to make sure all expectations are met.

I also hold myself to high standards when it comes to software quality. I have a healthy obsession with organizing, documenting, and automating project aspects, so that everything runs smoothly when I am not around.

What makes Ruan stand out is that he actually cares about the work he does. He wants each line of code to be his best work. Not in a I'll-take-my-own-sweet-time kind of way. But in a I-want-to-help-the-business-succeed kind of way. — Bill Denk (Founder, FlikFlix)


If you're still with me, then I'd love to learn more about what you're working on!

Send me an e-mail at hey@ruanmartinelli.com with a brief description of what you are looking for. We will talk about timelines, scope, budget, and make sure we're a good fit. Keep it casual! I am professional, but laid-back. I'll get back to you in 1 business day.

I am currently based in Prague, Czech Republic (CEST Timezone).