Hi, I'm Jakub — full-stack developer and product builder. I design and build websites, SaaS apps, and AI integrations. Code, design and product thinking — all from one person.
Maker · Full stack · 2025
All your tabs, perfectly managed.
Next-gen browser tab manager. Popup, not a tab — 0 MB RAM when closed. AI clustering with GPT-4o-mini, cross-device sync, command palette and color-coded workspaces.
Founder · Full stack · 2025 — present
Understand theory. Train in practice. Write code like a Senior Developer.
AI-powered coding education SaaS. LeetCode-style Arena across 9 languages, Lucid AI mentor speaking your language, and automated Code Review — refactoring, Big-O analysis, bug fixes.
I work with founders, agencies and companies who want to ship something genuinely good — fast, without compromising on code quality.
Landing pages, product sites, company websites. SEO, animations, Core Web Vitals tuning — fast and outcome-driven.
Full stack: Next.js, auth, database, Stripe billing. The same way I built DevLucid and SeshTab — from first line of code to production.
OpenAI or Anthropic inside your product. AI assistants, process automation, data classification. No marketing fluff — only what actually works.
Shopify, inventory integrations, automations. 7 years running my own e-commerce business — I know what actually works, not just what looks pretty.
Your project doesn't fit any of the categories above? No problem. Drop me a line — I'll tell you honestly whether I can help.
Send a message30 minutes, no strings. You tell me what you need — I tell you whether I can deliver it well.
Fixed price, clear scope, milestones. Within 48 hours.
Weekly progress reviews, preview environment, full visibility at every step.
Deploy, monitoring, minor tweaks for 30 days post-launch — included.
"I build things I'd want to use myself. Sometimes other people like them too."
I'm based in Kraków and studying CS at UKEN. It all started back in 2018 with my own e-commerce — that's where I learned that a good product isn't just about code, but obsession over detail.
Along the way: engineering support at PolicyFly in Germany, IT support at Electrolux, custom tooling, and finally my own products — DevLucid and SeshTab. Today I combine engineering, product design and business knowledge, because I've actually run a business myself.
Looking for projects where I can bring more than just code — product context, good decisions, and care for quality.
Fastest route: the form below or email. I reply within 24 hours, initial quote within 48.