Created the MVP of a multimedia-rich language learning platform, Flashcard Space.- Developed intelligent AI-driven tools for course creation and quality assurance.- Successfully launched multiple courses for Polish and English learners.- Tech stack: OpenAI API, Azure AI Foundry, Gemini API, Claude API, Stable Diffusion, Flux AI, C#, .NET 9, WPF, Vite, GitHub Actions, AWS Lambda, and Hugo.

Migrating a complex backend system collecting data from a range of devices from VMs to Azure PaaS services. Some of my responsibilities:- designing API changes required to move from a single-tenant architecture to a multi-tenant architecture (esp., in the authorization area),- designing solutions to address technical debts.

Developing solutions in the company's R&D center in Warsaw to create the best hearing aid in the world.- design and development of shared cloud infrastructure and SDKs (2020-21)- leading the cloud competence group for Azure developers in the company (2020-21)- design and development of a microservice-based web application (2019-20)- development and maintenance of a large application in .NET Framework with WPF (2018)- technologies (recent): AKS/Kubernetes, several Azure services, Azure DevOps, Docker, ASP.NET Core- other technologies (earlier projects): bash, React, TypeScript, CosmosDB, WPF

Developing software for Mobile Cardiac Telemetry monitoring system.- implementing features in a Windows Forms client,- maintaining ASP.NET Web Forms application,- maintaining core back-end services,- working with multi-threaded code on a daily basis,- profiling applications' performance and memory usage,- working in SCRUM methodology.- technologies: C#, Windows Forms, ASP.NET Web Forms, dotMemory, dotTrace, xUnit, Moq, Castle Windsor, TFS

Developing large, distributed, web-based ERP system.- implementing and maintaining core accounting functionalities,- scaling up the system and optimizing performance,- working in SCRUM methodology.- technologies: C#, ASP.NET MVC, SQL Server 2012, NHibernate, NServiceBus, Code Contracts, NUnit, Moq, Castle Windsor, knockout.js, TFS

Developing web projects- migration and development of social media site in ASP.NET- technologies: ASP.NET Web Forms, JavaScript, LESS/SASS/CSSDeveloping client applications & Microsoft Office add-on- development of web-integrated .NET/WPF application for a publishing house- technologies: C#, WPF, WCF, VSTODeveloping intranet solutions with use of SharePoint platform.- developing and maintaining large accounting system based on SharePoint for a client,- developing intranet services for large private companies and government institutions,- implementing branding in small and medium-sized SharePoint 2010/2013 projects.- technologies: SharePoint, SQL Server 2008, jQuery

Data collection and analysis for research in a field of biometrics.- technologies: MATLAB, MATLAB Image Processing Toolbox, Windows Forms