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OLEG KHYTREN
Full-stack .NET Developer
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I'm .NET Developer with 9 years of experience. I started learning programming parallel to my study in the university, and now I work and enjoy it. My goal is to find a team where I can grow as a specialist and overcome new challenges. I am an open, responsible and sociable person.
Education
Economy specialist, Ivan Franko National University of Lviv, Lviv
January 2006 – January 2010
I like economy, but my love is programming.

Work experience
Freelance, Self entrepreneur
February 2024 – present
I have done a bunch of tasks on this position. The most challenging are producing a whole plan for the system using DDD approach and developing a backend part of a microservice.
VARTEQ Inc., backend developer
August 2022 – December 2023
I was working for a mortgage company. We were switching and redoing the platform from the outdated .NET Framework to a new solution that was based on the new .NET Core. The codebase was enormous, and I liked it. A robust solution produces opportunities to grow as a developer. We apply the DDD approach and microservices architecture. I was the one who developed the whole microservice from scratch. I used there mediator, builder, chain of responsibility, composite, strategy and many other patterns. Also I was covering one of the microservices with tests and proposed a new approach to write the tests for a complex part of the codebase like the one I was working on. My work had a solid impact on the project.

A significant technical challenge with SQL was to migrate the data from the outdated solution to the new one. It took a lot of time, because you should be very precise and double-check everything manually each time you proceed with an updated SQL script, because it would have a powerful impact on the production version of the project. It was definitely tough.
SoftServe, Full Stack Developer
March 2021 – August 2022
This is a really powerful place where you can feel how your brain becomes stronger. Agile / Scrum methodologies and other cool and powerful processes give me a different vision on how to make a strong and stable company, how to organize the work of over 50 people.

My role at the healthcare company was just a Developer where I did some usual programming stuff, like fixing bugs, developing a website, moving on with Agile, closing stories and so on. We were developing a substantial marketplace on this project with a massive codebase. That's where I first worked with ElasticSearch, MongoDB, Nexus and many other technologies. We had MySQL and MSSQL databases and were switching from MySQL to MSSQL. We have used ElasticSearch to speed up searching.
RemSoft.Dev, Full Stack Developer
January 2019 – June 2020
I’ve worked on many outsourced companies. From big old projects based on .NET Framework and AngularJS to modern startups based on Blazor WASM and .NET 5. That was an amazing experience. I'd worked with big CRM systems, post-business, self-entrepreneurs. We had clients from Australia, Austria, UK, USA, and Israel. There was big stack of different technologies like ADO.NET, EntityFramework, AngularJS, Blazor, Azure, GCP, Bootstrap, XUnit and many others.
Pet project, Self entrepreneur
April 2017 – January 2019
Project was called AMZSupports. I worked to ensure a positive and hassle-free Amazon Marketplace trader experience. Project includes:
- Google Chrome browser extension;
- Data parser from Amazon Marketplace and Ebay (.NET + Selenium);
- Web-site based on ASP.NET MVC + Web API;
- Integrations with Amazon API;
- Integrations with Google Sheets and Google Drive;

Hobbies
Programming
Guitar playing
Cooking
Skills
C#

ASP.NET MVC
EnityFramework
LINQ
DDD
CSS3
HTML5
JavaScript
Angular
React
Blazor
MySQL
SQL
Redis
ElasticSearch
Kubernetes
Docker
Azure
Design Patterns
Microservices
xUnit
TDD
CQRS
Clean Architecture
Ansible
MongoDB
Git
ADO.NET
Postman