I combine five years of IT experience with a passion for software architecture, team leadership and machine learning research. Whether I am scaling backend systems for 60,000 users, running a 100+ person tech organisation, or forecasting electricity demand on supercomputers, I focus on delivering real-world impact. I am also the winner of Europe's largest programming contest, HackYeah 2025.
Mieszkaniownik · a live map of the Polish housing market: 7 portals, 1.4M offers
Listing portals, notarial deed prices, building permits and land-use zoning, from voivodeship down to a single street. 2,948 administrative units, 36 statistical layers, 2.83M building permits. Continuous ingestion with field-level change history kept over years, and cross-source matching of listings to a single physical property.
System Ligowy · a whole table tennis season in one place
Seasons, divisions and matches for the Opole table tennis association. Protocols scored live, tables, player rankings, squads from the PZTS register, PDF and XLSX exports, four roles with separate panels.
10 Kroków po diagnozie · life after a diagnosis in ten steps
An accessibility-first app for people meeting disability, with interactive quizzes and a FireCMS-powered content backend. Built for Fundacja Celując w Przyszłość.
epftoolbox2 · electricity price forecasting library, published on PyPI
A complete rewrite of the academic epftoolbox, rebuilt as composable pipelines rather than scripts. Data sources for ENTSO-E, Open-Meteo and calendar features, plus transformers, validators, models, evaluators and exporters that assemble into data and model pipelines defined in YAML, so an experiment can be saved, reloaded and rerun. Built-in request caching and process-based parallelism.
Read more · PyPI · Repository · Documentation
PRIORITY · seven-day electricity load forecasts on HPC infrastructure
PRobabilistic mid- and long-term prIce fORecasting In electriciTY markets, an international DFG-NCN project run jointly by prof. Rafał Weron in Wrocław and prof. Florian Ziel in Essen. Machine learning models in Python, with data integrated from ENTSO-E and Open-Meteo.
Unlimitech · lead backend, architect and DevOps, 2020 to January 2026
E-commerce software house. I owned the technical vision for the product portfolio.
- QuickSend, comprehensive e-commerce support software: three years as architect and lead backend developer. Warehouse handling, shipping documents, subscriptions, data deduplication, fiscalisation
- Better Traffic, traffic queueing trusted by Universal Music, Stage24 and Abilet, handling 60,000+ concurrent users during premieres
- ApexWMS, a warehouse management system from scratch, including the mobile app for Zebra scanners
- StockSynch, stock synchronisation from many supplier sources, millions of products a day
- Integrations 2.0, a year-long programme of 30+ integration projects for around 20 clients, leading a team of five
- Infrastructure migration covering 100+ applications, cutting running costs by 70 to 80%
Integrations with BaseLinker, Zalando, AtomStore, Google Feed and others. PHP/Laravel, Node.js with AdonisJS, Vue.js, SQL, queues, CI/CD.
KN Solvro · president and head of backend, 2024 to 2025
President of the executive board of the largest student research group at Wrocław University of Science and Technology. The organisation grew from about 20 people to over 120 across nine technical sections, with a budget above 100,000 PLN and four external grants, and was named Strategic Student Society 2025.
As head of backend: 20+ engineers, one standard stack across seven products at once, and training for 250+ students. Course materials are on the Solvro blog and GitHub.
Always open to discussing ideas and propositions. dawid@linek.dev · linek.dev · LinkedIn