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OLEG KHYTREN
Full-stack .NET Developer

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хитрень-080491203/

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 HOBBIES
Economy specialist, Ivan Franko National Programming
University of Lviv, Lviv Guitar playing
Cooking
January 2006 – January 2010
I like economy, but my love is programming. SKILLS
C#

WORK EXPERIENCE ASP.NET MVC

Freelance, Self entrepreneur
EnityFramework Core
February 2024 – present
I have done a bunch of tasks on this position. The most LINQ
challenging are producing a whole plan for the system using
DDD approach and developing a backend part of a DDD
microservice.
CSS3
VARTEQ Inc., backend developer
August 2022 – December 2023 HTML5
I was working for a mortgage company. We were switching
and redoing the platform from the outdated .NET JavaScript
Framework to a new solution that was based on the new
.NET Core. The codebase was enormous, and I liked it. A Angular
robust solution produces opportunities to grow as a
developer. We apply the DDD approach and microservices React
architecture. I was the one who developed the whole
microservice from scratch. I used there mediator, builder, Blazor
chain of responsibility, composite, strategy and many other
patterns. Also I was covering one of the microservices with MySQL
tests and proposed a new approach to write the tests for a
complex part of the codebase like the one I was working on. SQL
My work had a solid impact on the project.
Redis
A significant technical challenge with SQL was to migrate the ElasticSearch
data from the outdated solution to the new one. It took a lot
of time, because you should be very precise and double- Kubernetes
check everything manually each time you proceed with an
updated SQL script, because it would have a powerful impact Docker
on the production version of the project. It was definitely
tough. Azure

SoftServe, Full Stack Developer Design Patterns
March 2021 – August 2022
This is a really powerful place where you can feel how your Microservices
brain becomes stronger. Agile / Scrum methodologies and
other cool and powerful processes give me a different vision xUnit
on how to make a strong and stable company, how to
organize the work of over 50 people. TDD

My role at the healthcare company was just a Developer CQRS
where I did some usual programming stuff, like fixing bugs,
developing a website, moving on with Agile, closing stories Clean Architecture
and so on. We were developing a substantial marketplace on
this project with a massive codebase. That's where I first Ansible
worked with ElasticSearch, MongoDB, Nexus and many other
technologies. We had MySQL and MSSQL databases and MongoDB
were switching from MySQL to MSSQL. We have used
ElasticSearch to speed up searching. Git

RemSoft.Dev, Full Stack Developer ADO.NET
January 2019 – June 2020
Postman
I’ve worked on many outsourced companies. From big old
projects based on .NET Framework and AngularJS to modern
RabbitMQ
startups based on Blazor WASM and .NET 5. That was an
amazing experience. I'd worked with big CRM systems, post-
.NET
business, self-entrepreneurs. We had clients from Australia,
Austria, UK, USA, and Israel. There was big stack of different REST API
technologies like ADO.NET, EntityFramework, AngularJS,
Blazor, Azure, GCP, Bootstrap, XUnit and many others. Azure Functions

Pet project, Self entrepreneur Azure SQL
April 2017 – January 2019
Project was called AMZSupports. I worked to ensure a OOP
positive and hassle-free Amazon Marketplace trader
experience. Project includes: SOLID
- Google Chrome browser extension;
- Data parser from Amazon Marketplace and Ebay (.NET + KISS
Selenium);
AWS
- Web-site based on ASP.NET MVC + Web API;
- Integrations with Amazon API;
PostgreSQL
- Integrations with Google Sheets and Google Drive;
Multithreading

Agile

Scrum

Hangfire

MassTransit

Integration tests

SAST

SCA

k6

NBomber

Performance tests

Metrics

Loki

Grafana

Tempo

Prometheus