Browse My
Selected case studies and hands-on product work from my experience as a frontend lead, architect, and full-stack builder.
Deep Dives
Enterprise Banking / Greenfield / Technical Leadership
Greenfield web banking platform for a large Eastern European commercial bank. I led frontend architecture, team setup, and engineering delivery for a mobile-first browser banking experience spanning onboarding, payments, transfers, and multi-currency operations.
Pet / R&D / Architecture Demo
Admin web app and API for managing a language-learning Telegram bot. Multi-language support, AI-assisted content generation, and comprehensive word/user management.
Fintech / Product Development / Solo Build
Interactive calculator comparing 7 Polish treasury bond series against bank deposits. Built as a solo product from idea to production — analysis, UX design, calculation engine, and deployment.
Hands-On Builds
Product & Full Stack Developer
Interactive calculator that compares 7 Polish treasury bond series against bank deposits over a custom investment horizon. Models macro scenarios (inflation, NBP rate, WIBOR), accounts for Belka tax & IKE exemption, early redemption fees, and multi-year rollovers — all in a single-page tool.
Full Stack Developer
Vocabulary learning app with spaced repetition algorithm (SM-2). Built as a Telegram Mini App with full offline demo mode. Features Italian vocabulary with verb conjugations, multiple exercise types, and progress tracking.
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