• Designing and implementing Azure native microservices and Azure Functions• Designing and implementing background jobs framework based on Azure Container Apps• Writing unit, integration, acceptance and architecture tests• Implementing and maintaining Azure CI/CD pipelines• Ensuring reliability and high performance of solutions• Conducting meetings, proposing technical solutions• Writing documentation, ADRs and creating C4 model diagrams to ensure good, common architecture understanding in the team• Giving technical presentationsTech stack: .NET Framework, .NET Core, Entity Framework Core, MediatR, Azure, Azure DevOps, xUnit, BICEP, YAML, Powershell, Terraform, PlantUML

• Leading a five-person team• Designing and implementing system architecture• Introducing best practices• Analyzing business requirements and suggesting technical solutions• Time estimations. Short and long term team work schedule planning• Migrating system from .NET Framework to .NET Core• Conducting technical interviews• Working in booking/scheduling business domain Tech stack: .NET 6, Entity Framework Core, Hangfire, MediatR, Azure, Azure DevOps, xUnit, SignalR

• Responsible for backend part of the system• Improved API performance by 30%• Changing the monolithic system architecture toward modularization, what improved stability and decreased the overall complexity andnumber of new bugs appearing while making new changes• Introducing best practices (unit and integration testing, CI, CD)• Introduced Event Storming to overcome communication problems with client - used Miro board software. Developed a new, more pictorial way to describe client requirements what drastically improved communication.• New requirements analysis and time estimations. Short and long term work schedule planning.• Designed and implemented CI and CD pipelines handling 5 environments (Azure DevOps)• Administrating infrastructure hosted in Azure, cost analysis and optimization (unused resources detection, improvements to reduce some ofthe resources)Tech stack: .NET Web Api 2, EF6, Hangfire, MediatR, Azure, MSTest, DDD, xUnit

• Developing web backend systems on all stages (analysis, design, implementation, release, maintenance).• Developing Umbraco CMS based applications.• Creation CI and CD pipelines for small web application (Azure DevOps)• Performing stress tests using JMeter which revealed REST API low performance. Found and speeded-up problematic endpoints what drastically improved user experience.• Estimating small projects and worked with client to gather requirements.• Introducing best practices across all team members working on in-house application - code reviews, tips.Tech stack: .NET Core, .NET Framework, Entity Framework, MVC, Umbraco, Azure, REST, Angular.js, Angular 2+, Vue.js, SQL Server, Hangfire

Mobile application implementation using Xamarin MvvmCross for a real time car queue and CNG gas station management.Tech stack: Xamarin, Mvvm Cross, SignalR, RFID, Bluetooth LE, NFC

• Developing .NET MVC application showing data collected by IoT measuring devices.• Big amount of data had to be displayed on the map causing markers and polygons overlapping. Introduced some significant improvements to map component using OpenLayers library (e.g. selecting markers by drawing custom polygons, markers clustering).Tech stack: ASP .NET MVC, Razor, CSS, JavaScript, JQuery, Open Layers