Jakub Downarowicz

A dark eco-tech mobile product for simplifying deposit packaging returns in Poland. Oddavka combines estimated deposit recovery, return-point discovery, pickup requests, and AI-assisted rule explanations into one mobile-first experience, with clear domain boundaries across products, return points, pickups, payments, and AI.

A fullstack platform for ingesting ADS-B flight data, detecting route anomalies with machine learning, and visualizing incidents on an interactive map for faster analyst review.

A modular monolith MVP for a multi-service holding focused on centralized lead orchestration and cross-sell detection between business units. Built with clear bounded contexts, event-driven communication, and schema-level data isolation to stay ready for future service extraction.

A mobile-first leasing platform and complete lead acquisition system for MintLeasing. It includes vehicle inventory browsing, advanced filtering, a multi-step leasing survey, CRM Livespace integration, admin panel, automated SMS outreach, campaign management, statistics, monitoring, tests for key business logic, SEO hardening, and performance optimizations.

Landing website for a youth organization promoting social engagement and cultural awareness. Focused on clarity, credibility, and local community impact.

A responsive company website for earthworks and construction services. Bold service-led storytelling, project galleries, fleet presentation, and prominent quote paths turn the site into a focused lead-generation tool.

Store management system for products, orders, clients, and invoicing. Built as an operational tool for daily team workflows and reporting.

PWA for a personal training center with trainer profiles, service details, ecommerce flow, and contact conversion paths.