Andrii

Andrii Osetskyi
Junior .NET Backend Developer
Novoiavorivsk, Lviv, Ukraine
[open contact info](look above in the "contact info" section)
[open contact info](look above in the "contact info" section)
LinkedIn↗
Projects:
Task Management API↗ :
• Developed REST API for task and user management
• Implemented JWT authentication and role-based authorization
• Applied Clean Architecture and CQRS with MediatR
• Used Entity Framework Core with PostgreSQL
• Added validation and global exception handling

Profile
Junior .NET Backend Developer with hands-on experience building REST APIs using
C#, ASP.NET Core, and Entity Framework Core. Contributed to a team-based
Streetcode project at SoftServe IT Academy, working with CQRS, MediatR,
FluentValidation, AutoMapper, and MS SQL Server. Also developed a personal Task
Management API with JWT authentication, role-based authorization, Clean
Architecture, CQRS, and PostgreSQL.

I’m interested in backend development and currently focusing on improving my
.NET skills, software architecture, unit testing, and database design. I’m looking for
an opportunity to apply my knowledge in a professional development team and
continue growing through real-world projects.

Skills
Programming Languages: C#, JavaScript, HTML5, CSS3
Frameworks & Libraries: .NET Core, ASP.NET Core Web API, Entity Framework
Core, MediatR, AutoMapper, FluentValidation, Bootstrap
Authentication & Authorization: JWT, ASP.NET Identity
Databases: MS SQL Server, PostgreSQL
Tools: Visual Studio, Git, GitHub, Postman
Concepts: OOP, SOLID, REST API, CQRS

Experience
Streetcode Project
SoftServe IT Academy, in cooperation with the Ministry of Education and Science of
Ukraine

Role: .NET Backend Developer
Period: May 2025 – June 2025
Team: 9 developers · Agile/Scrum

• Developed REST API endpoints for admin content management, including
timeline items, texts, and terms.
• Implemented CQRS commands and MediatR handlers for content creation
and deletion operations.
• Added request DTO validation using FluentValidation and updated
AutoMapper profiles to support new fields and mappings.
• Worked on backend functionality for team management, including team
members, positions, and team member links.
• Wrote unit tests for MediatR handlers using xUnit, Moq, and
FluentAssertions, covering successful operations, empty results, and error
scenarios.
• Created and applied Entity Framework Core migrations and worked with MS
SQL Server.
• Participated in code reviews, sprint planning, daily stand-ups, and other
Scrum activities.
Technologies: C#, .NET, ASP.NET Core Web API, Entity Framework Core, MediatR,
AutoMapper, FluentValidation, xUnit, Moq, FluentAssertions, MS SQL Server, GitHub,
REST API

Education
Master’s Degree in Computer Science (Sep 2023 – Dec 2024)
Specialization: Computer Ecological-Economic Monitoring
Lviv Polytechnic National University

Bachelor’s Degree in Computer Science (Sep 2019 – Jun 2023)
Specialization: Computer Science
Lviv Polytechnic National University

Languages
Ukrainian: Native
English: B2