Олена Косташ

Looking for a job

Олена Косташ

@0007811

C# developer at NBomber building authentication across NBomber Website and NBomber Studio, plus a TimescaleDB integration plugin.

At NBomber, I designed and implemented authentication across NBomber Website and NBomber Studio, integrating Clerk with ASP.NET Core. I also developed onboarding and project membership features, including automatic default project creation.

I’ve developed REST APIs and full-stack features with C#, ASP.NET Core, Vue.js, and PostgreSQL, and implemented CI/CD pipelines using GitHub Actions and Docker. I also developed a TimescaleDB integration plugin for NBomber and automated tests with xUnit, NSubstitute, and Playwright.

Experience

Work history, roles, and key accomplishments

NB

Current

Middle C# Developer

Current

NBomber

Sep 2022 - Present (4 years 1 month)

Designed and implemented authentication across two applications, integrating Clerk with ASP.NET Core. Developed REST APIs, full-stack features, CI/CD pipelines, and automated tests.

C#ASP.NET Core Vue.Js PostgreSQL TimeScaleDB GitHub Actions Docker xUnit NSubstitute Playwright Claude Code

NB

Junior C# Developer

NBomber

Contributed to NBomber Cloud development, built REST APIs for load test management, and implemented backend logic with SQL and RepoDB.

ASP.NET Core Vue.Js REST APIs SQL RepoDb xUnit

NB

Trainee C# Developer

NBomber

Developed automated tests, performed performance testing of databases, and built load-testing scenarios for ASP.NET Core APIs.

Testing Automation Performance Testing PostgreSQL Redis SQLite ASP.NET Core

Education

Degrees, certifications, and relevant coursework

BA

Beetroot Academy

C# programming course, Computer Science

2022 - 2023

Completed a C# programming course at Beetroot Academy from October 2022 to March 2023.

KH

Kyiv National Economic University named after Vadym Hetman

Master's Degree in Economics, Economics

Master's degree in Economics from Kyiv National Economic University named after Vadym Hetman, completed in 2012.

IK

Institute of Management and Finance, Taras Shevchenko National University of Kyiv

Bachelor's Degree in Management, Management

Bachelor's degree in Management from the Institute of Management and Finance, Taras Shevchenko National University of Kyiv, completed in 2010.

Tech stack

Software and tools used professionally

Postman

Fiddler

GitHub Actions

PostgreSQL

SQLite

.NET Core

.NET

ASP.NET Core

Redis

Vue.js

JavaScript

C#

Git

Docker

TimescaleDB

SQL

Playwright

Claude Code

ChatGPT

Dapper

Availability

Looking for a job

Location

Poland

Authorized to work in

Salary expectations

230k+ PLN

Social media

Job categories

Full Stack .NET Developer Full Stack Developer Backend Engineer

Skills

C#ASP.NET Core .NET Vue.Js REST APIs PostgreSQL CI CD Docker GitHub Actions Testing Automation Integration Testing xUnit NSubstitute Playwright NUnit

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