Products I've built or led — professionally and after hours.
Tech Lead · Full-stack · Architect
Personal AI Career Manager. Personalize your CV for any job ad in seconds. Full-stack ownership: architecture, LLM integrations, analytics, and Flutter mobile.
Tech Lead · Backend · Architect
The leading IT job board in Central Europe — 40k+ active listings, 1M+ unique monthly users. Led backend architecture and a zero-downtime monolith-to-microservices migration.
Director of R&D · Architect · Product Owner · Software Engineer
Real-time content delivery to thousands of active screens. I owned both the product direction and the technical execution — responsible for the platform's entire look and feel, overseeing all major features: analytics, terminal management, campaign scheduling, permissions, and a custom visual designer. Acting as business owner and tech lead simultaneously.
Software Engineer · Full-stack
Internal admin panel for Allegro Pay — the buy-now-pay-later product of Poland's largest e-commerce platform. Built dedicated tooling for fraud investigation, log analysis, and end-to-end administration of the payment system.
Software Engineer · Backend
Modular enterprise framework for centralized data management and unified business operations. Covers Master Data Management, Product Information Management (PIM), DataSync, dashboarding, and a configurable WebPortal. Used by enterprise clients across Central Europe, available cloud and on-premise.
Software Engineer · Backend
Digital signage CMS by Nanovo — the largest DS integrator in Central & Eastern Europe, winning global markets. Signio ranks among the world's leading content management systems for digital signage, managing 120,000+ devices for clients including Żabka, RTV Euro AGD, Orange, and Cinema City.
Built 100% solo — architecture, design, implementation. Good lessons on why coding is the easier part of building products.
NFT web browser game engine that transforms any ERC-721 contract into a personalized browser game. Multi-tenant, supported Ethereum, Polygon, Binance. One-man army: designer, developer, CTO. Shipped with a full marketing landing page.
Cryptocurrency monitor with real-time reactive data via SignalR (WebSocket). Microservices architecture with gRPC communication. CI/CD through Azure.
LMS platform for schools during remote learning. CQRS + monolith architecture, Angular Material frontend, separate CDN for files.