Senior Full-Stack Engineer specializing in multi-market e-commerce, performance optimization, and scalable architecture. Proven track record shipping high-traffic platforms across international markets.
Production systems serving real users - from multi-market e-commerce to open-source developer tools.
A trusted media measurement platform providing cross-platform audience analytics and advertising evaluation services.
A collaborative project developed with Deante, a leading Polish manufacturer of kitchen and bathroom fittings.
A platform for architects and designers featuring 3D models, bathroom and kitchen collections, and design resources from Deante.
Open-source AI-powered fitness platform — calorie tracking, workout plans, and real-time dietary coaching
Compare 500+ cities by cost of living, weather, internet speed, and safety — built for digital nomads and remote workers
Open source log management platform. Ingest, search, and visualize your application logs in real-time. Built with Nuxt 4, Prisma, and Neon PostgreSQL.
Open source Polish B2B tax calculator. Compare tax forms, ZUS contributions, and IP BOX. Built with Nuxt 4, Vue 3, TypeScript.
Open-source call-to-action component library. Drop-in banners, modals, and notification bars for any website.
Open-source expense sharing app. Split bills with friends, track group expenses, and settle up in any currency.
Deep-dives into performance, architecture, and real production challenges.
vue3-toastify was shipping in the entry chunk of every single page — including those that never show a toast. A dynamic import composable moved it to a separate chunk that loads on first trigger, cutting 22KB from entry.js and 9KB from entry.css.
How a single inline await in our Vue composable was silently serializing all data fetching during server-side rendering, and how onServerPrefetch fixed it with zero architectural changes.
How we discovered that three redirect constant files were shipping 316KB of dead weight to every browser, and why moving them to server middleware with a database fallback cut our JavaScript bundle by a third.
We discovered that our image optimization pipeline was generating perfect srcset values that the browser completely ignored. The fix was a single HTML attribute we had been treating as optional for years.
We were burning full Vue Router navigation cycles just to fix slug URLs on product pages. Replacing router.replace() with history.replaceState() eliminated wasted re-renders, fixed broken SEO meta tags, and cut client-side canonicalization to a single DOM-free call.
Our Redis cache kept dropping TLS connections, taking down the entire caching layer. After a misleading benchmark nearly sent us in the wrong direction, we migrated to PostgreSQL — same performance, zero drops, one less service to manage.