Dmytro Serhatyi, Developer in Warsaw, Poland
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Dmytro Serhatyi

Verified Expert  in Engineering

Software Developer

Warsaw, Poland

Toptal member since January 23, 2022

Expertise
Code ReviewJavaScriptCSSHTML5AngularTypeScriptReact.jsC#Node.jsMacOSVisual Studio DevelopmentJavaExpress.jsMongoDB
Bio

Dmytro is a software engineer specializing in JavaScript and front-end projects. He created a trading application with real-time updates for stock market brokers and traders. As part of the project, he boosted performance by about 30% by upgrading outdated embedded technology and sped up API development by introducing a new architectural style. Dmytro enjoys diving into product ideas while brainstorming to resolve challenges.

Portfolio

Self-employed
JavaScript, TypeScript, Angular, React, Java, Interviewing, Source Code Review...
Self-employed
JavaScript, TypeScript, Angular, RxJS, NgRx, C#, .NET Core, Interviewing...
ZaraffaSoft
AngularJS, React, Node.js, Express.js, MongoDB, Ionic

Experience

  • JavaScript - 6 years
  • TypeScript - 5 years
  • Angular - 5 years
  • RxJS - 4 years
  • React - 3 years
  • NgRx - 3 years
  • C# - 3 years
  • Node.js - 2 years

Availability

Part-time

Preferred Environment

MacOS, Visual Studio Code (VS Code), Skype

The most amazing...

...tool I've developed is a simple and flexible client-side architecture, enabling other developers to easily interact with the code.

Work Experience

Software Engineer

2021 - PRESENT
Self-employed
  • Developed flexible client-side architecture, allowing other developers to easily implement new features and scale existing ones.
  • Built from scratch infrastructure for unit and integral testing.
  • Initiated a changing API architectural style, which sped up new API development.
Technologies: JavaScript, TypeScript, Angular, React, Java, Interviewing, Source Code Review, Technical Hiring, Task Analysis, Code Review, HTML, CSS, HTML5, WebSockets

JavaScript Developer

2017 - 2020
Self-employed
  • Increased app performance by about 30% by convincing the team to get rid of old, embedded technology.
  • Developed an internal app for stock market traders and brokers.
  • Established efficient communication between the development and trading teams.
Technologies: JavaScript, TypeScript, Angular, RxJS, NgRx, C#, .NET Core, Interviewing, Source Code Review, Technical Hiring, Task Analysis, Code Review, HTML, CSS, HTML5, WebSockets

Front-end Developer

2016 - 2017
ZaraffaSoft
  • Developed the app, website, and server for a travel social network.
  • Guided a luggage storage startup to become a successful business by developing the front-end part.
  • Switched between the development of several projects from one client, to support continuous functionality for all of them.
Technologies: AngularJS, React, Node.js, Express.js, MongoDB, Ionic

Experience

Trading Web App

A trading application for stock market brokers and traders with real-time updates. I led a development team of four engineers in the combined roles of project manager and full-stack developer.

Social Network for Travelers

A multi-platform application for travelers, where users can share their impressions about places all over the world. My primary role was to develop a mobile application with AngularJS and Ionic. Additionally, I took part in developing the server-side with Node.js and the web app with React.

Luggage Storage Web App

I built this JavaScript web application that allows users to store their baggage before hotel check-in or departure flight. I was a lead front-end developer, responsible for the client-side and its integration with third-party services such as maps and payments.

Skills

Libraries/APIs

RxJS, React, NgRx, Node.js

Tools

Skype

Languages

JavaScript, TypeScript, HTML, CSS, HTML5, C#, Java

Frameworks

Angular, .NET Core, Express.js, AngularJS, Ionic

Platforms

MacOS, Visual Studio Code (VS Code)

Storage

MongoDB

Other

Code Review, Source Code Review, Technical Hiring, Task Analysis, Interviewing, WebSockets

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