Artem

ARTEM HAIDOSH
Software Engineer | C# / .NET Developer
Slovakia | Open to relocation | [open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section) | GitHub: https://github.com/ArtemHaidosh
PROFESSIONAL SUMMARY
Software Engineer with commercial experience in C#/.NET and production web application development. Strong practical background in C#, ASP.NET, Entity Framework Core, REST APIs, SQL Server, JavaScript, Git, testing, and code review. Experienced in independently implementing functionality, debugging and maintaining production systems, and working across backend, database, and frontend layers. Currently also developing a commercial freelance project using FastAPI, PostgreSQL, WebSocket, React, Docker, and Linux.
TECHNICAL SKILLS
Languages: C#, JavaScript, SQL, Python, Java
Backend & Web: .NET, ASP.NET, ASP.NET MVC, ASP.NET Razor, REST API, Entity Framework Core, LINQ, FastAPI, WebSocket
Frontend: JavaScript, React, HTML, CSS, AJAX
Databases: Microsoft SQL Server, PostgreSQL, MySQL, Oracle, Stored Procedures, Database Design, Query Optimization
Testing: Selenium, Pytest, Postman, Functional Testing, Regression Testing, Unit Testing, Integration Testing
Tools & Practices: Git, GitHub, Docker, Linux, Windows Server/Administration, CI/CD, PowerShell, Visual Studio, Agile, Code Review
PROFESSIONAL EXPERIENCE
Fullstack Application Developer — nsw s.r.o. | Slovakia | 01/2025 – 09/2026
• Developed and maintained 5+ production web modules used by approximately 100–500 users, working with C#, ASP.NET Razor, JavaScript, AJAX, and SQL Server.
• Independently implemented functionality across database, backend, and frontend layers, including controllers, views, database functions/procedures, and client-side functionality.
• Worked with Entity Framework Core and LINQ in production .NET applications.
• Supported migration from Oracle to Microsoft SQL Server, correcting migrated database objects and implementing missing procedures/functions; worked with approximately 100 tables.
• Reduced bug count by 40% through refactoring legacy frontend code and resolving production issues.
• Created and maintained Selenium UI tests in Python for regression coverage of a frequently changing application area.
• Worked with Git-based development, code reviews, testing, and 2-week Agile sprint cycles.
Software Developer — ShadowTalk | Commercial Freelance Project | 09/2026 – Present
• Developing backend functionality using FastAPI, PostgreSQL, WebSocket, and authentication/authorization mechanisms.
• Contributing to the React frontend and implementing real-time voice-call functionality using WebRTC.
• Managing Docker-based deployment on Linux/VPS and working with automated tests using pytest.
• Working with Git-based development and CI/CD workflows.
Trainee Test Engineer — GlobalLogic | Koszalin, Poland | 11/2024 – 05/2025
• Created and executed 150+ functional and regression test cases for web applications.
• Reported critical defects and supported development feedback and issue resolution.
• Worked in an Agile environment using Jira and Confluence.
EDUCATION
Master’s Degree in Applied Informatics and Software Development — Matej Bel University | 2025 – Present | Expected 2027
Bachelor’s Degree in Applied Informatics and Software Development — Matej Bel University | 2022 – 2025
Java Developer — Cyber Bionic Systematics | 02/2024 – 08/2024
MASTER’S THESIS
Use of Small Language Models on Edge Devices for Secure Processing of Sensitive Data in Cloud Systems — In progress
Researching secure processing of sensitive data using small language models on edge devices; defining the problem scope, technology stack, and implementation plan. NVIDIA Jetson selected as the target edge platform.
LANGUAGES & ADDITIONAL
English — Advanced | Slovak — Fluent | Ukrainian — Native
Work authorization: Slovakia | No sponsorship required | Open to relocation and remote, hybrid, or office-based opportunities