Shaun Jacobsen

I'm Shaun Jacobsen.

I help fix bugs and build new features in web apps.

Got a bug, missing feature, or unclear functionality in your app? I help refine features, fix issues, and build what’s missing inside existing web applications. Focused on practical solutions, not overengineering.

Let’s work on your web app

If you have a bug, missing feature, or something that needs improving, I can help.

Full-Stack Web App Development

I build and maintain modern web applications using React, JavaScript, and Node.js. Focused on performance, clean architecture, and real-world usability.

Feature Design & Implementation

I work with teams to clarify what needs to be built, then implement it inside existing web apps. I focus on making features usable, consistent, and technically sound within real-world constraints.

Bug Fixing & Codebase Debugging

I fix frontend and backend issues in existing applications: From broken UI flows to logic errors and performance problems.

Payment & Ecommerce Integrations (Stripe, Adyen)

I implement and debug payment flows using Stripe and Adyen, including checkout flows, webhook handling, and transaction troubleshooting.

API Integration & Backend Logic

I connect frontend applications to APIs and build lightweight backend services for real-world use cases.

American. Multilingual. EU-based.

Communication is never an issue: I speak English natively and business-level French and Dutch. I'm a US citizen based in the EU.

Let's work together.

Share your issue or idea, and I’ll help you figure out the next step.