Yaroslav

KORNIIENKO YAROSLAV
[open contact info](look above in the "contact info" section) ⋄ Kyiv, Ukraine
[open contact info](look above in the "contact info" section) ⋄ [open contact info](look above in the "contact info" section)

SUMMARY
Back-End Developer with 1 year of practical experience in developing scalable and performant web applications using
.NET stack. Strong understanding of REST APIs, database design, and modern software engineering principles.
Demonstrated ability to work both independently and as part of a cross-functional team. Proven leadership and
collaboration skills gained through active involvement in a youth leadership organization.
Tech stack includes: C#/.NET Core, EF Core, SQL Server, PostgreSQL, basic React, Azure.

SKILLS

Technologies:
- Back-End: C#/.NET(.NET Framework 4.8+, .NET Core 3.1+), ASP.NET Core, EF Core, LINQ,
FluentValidation
- Front-End (basic): JavaScript, TypeScript, HTML5/CSS3, React
- Testing: xUnit, NUnit
- RDBMS: MS SQL Server, PostgreSQL, SQLite
- API: REST API
- Tools: Git, GitHub, GitHub Actions
- Deployment: CI/CD pipelines, GitHub Pages
- Cloude (basic): Azure, GCP
- Concepts: SOLID principles, Clean Architecture, RESTful API Design, CQRS + MediatR

Languages: English (B1), Ukrainian (Native)

EXPERIENCE
Back-End .NET Developer – SoftServe May 2024 – April 2025
Streetcode, Collaboration with ITA Social Projects

Streetcode is a public digital platform that preserves and promotes local historical content through modern web
technologies. The platform enables users to explore interactive multimedia content, geo-based stories, and historical
archives.
My Key accomplishments and responsibilities:
• Implemented CRUD operations following the CQRS pattern using MediatR, improving separation of concerns
between read and write logic.
• Developed and extended validation rules for incoming data models (DTOs) using FluentValidation, ensuring
API reliability and reducing errors.
• Managed database schema changes and initial data seeding using Entity Framework Core migrations, ensuring
smooth deployment and consistency.
• Created unit and integration tests using xUnit, ensuring a high level of code quality and achieving 80% test
coverage for newly developed features.
• Actively participated in Scrum ceremonies: daily stand-ups, sprint planning, backlog grooming, and retrospec-
tives, contributing to team alignment and process improvement.
• Conducted code reviews, providing constructive feedback to peers to improve code quality and reduce defects
by 15%.
LEADERSHIP & VOLUNTEERING
Poklyk Yaru (Ukrainian Youth Leadership Organization), Ukraine 2020 – Present
A national non-governmental organization focused on fostering responsible youth through discipline, leadership, and
patriotic values. Instagram.
• Hold a leadership role within the organization’s governing body, overseeing member development and strategic
growth.
• Coordinated and managed large-scale events of up to 250 participants.
• Organized and led multiple summer camps and training programs with over 40 participants per session.
Key soft skills gained:
Leadership, team coordination, event planning, organizational management, public speaking, conflict resolution,
adaptability, strategic thinking, mentoring.

EDUCATION
Bachelor, The National University Of Life And Environmental Sciences Of Ukraine, Kyiv 2020 - 2024
ItStep Academy, Kyiv 2020 - 2022