Personal Web Demo

Sergiy Oliynyk

I'm a software developer.

About me

Welcome to my creative journey. My work is a testament to my commitment to bringing ideas to life, where each pixel becomes a brushstroke in the canvas of imagination.


I find inspiration in the world around me, whether through the pages of a captivating novel, the intricate details of typography, or the vibrant hues of nature during my outdoor escapades.


If you're curious to dive deeper into my work, you can follow me:

Work experience

Senior Software Engineer
GreenM
August 2021 - October 2024

Project: Analytics portal in health industry

Team: 5-10 engineers

  • Designed and implemented a new version of email subscriptions services.

  • Developed new features and fixed bugs on both front-end and back-end with focusing on back-end.

  • Came out with a way to create integration tests for a data layer querying Vertica and Snowflake databases.

  • Reviewed pull requests, provided help to colleagues with code improvements and design approaches.

Back End Senior Software Developer
Freelance
December 2020 – May 2021

Full Stack Senior Software Developer
NDA Company
December 2019 – July 2020

Project: Auction-like web application with specific functionality

  • Implemented requirements in all levels of the application

ASP.NET Core, C#, MS Unit, Entity Framework Core, LINQ, MS SQL Server, React, Azure, DDD, CQRS

Full Stack Senior Software Developer
Upwork
January 2016 – November 2019

Full Stack Software Developer, SEO Specialist
Self-employed
August 2007 – December 2015

Senior/Lead Software Developer
TechnoInfoService
February 2003 – June 2007

Senior Software Developer
Pixel GmbH
November 2000 - February 2003

Software Developer
X-tend
January 1997 – November 2000

Software Developer
Institute of software systems
September 1994 – December 1996

Education

Master degree in Computer Science
National Technical University (KPI)
September 1991 – February 1996

Skills

Backend .NET development

.NET Core, ASP.NET Core, C#, F#, Entity Framework Core, LINQ, MS SQL, Azure, xUnit, NUnit

Frontend development

Javascript, Typescript, React, Angular, Testing Library, Playwright

Amazon Web Services

SQS, DynamoDB, SES, Lambda, SNS, S3, CloudWatch, Secrets Manager, ECS (Fargate), CloudFormation, RDS, CloudFront, Amazon OpenSearch Service (Elasticsearch)

Methodologies & Practices

DDD, CQRS, FP, TDD, SOLID

DevOps

Octopus Deploy, GitHub Actions, Docker