OptiCode AB
Web Applications &Built to Last
I'm David Mattiasson — one developer, fully focused on your project. I build complex web applications for companies that need things done properly. You talk directly to the person writing the code.
What I Build
Whether you have a clear spec or just a rough idea — both are fine. Here's what I work on.
Websites
Fast, modern, clean and written in real code — not a page builder. Anything from a single landing page to a full company site, I build them properly and to last.
Applications
Custom dashboards, internal tools, business portals. The kind of builds that actually require thought — I'm at my best when the problem is genuinely difficult.
Web3
If your project touches blockchain — smart contracts, dApps, crypto infrastructure — I've built in that space too. Have delivered advanced marketplaces and games.
Why Work With Me
20 Years of Code
I've been writing code since before most coding tools existed — 13 years as an IT professional and with a university degree. I think about how systems break, not just how they're built.
Modern Stack
React, Next.js, TypeScript, HTML, CSS, Tailwind, Material UI, Node, Python — frameworks that hold up. I work with top-notch AI tooling daily, which speeds things up without skipping the thinking.
Direct - No Fluff
You work with me, not a project manager relaying messages. If something in your brief doesn't make sense, I'll say so. If a better approach exists, I'll tell you. You can count on me to deliver the best solution!
Have a project in mind?
Whether you have a clear scope or just a rough idea — I'm happy to have a conversation with you. No pitch, no sale talk. Let's build something!
Based in Kungsbacka (south of Gothenburg), working with clients worldwide. Project-based, hourly, or whatever fits your situation.