Summary

Expertise

Project Highlights

Education

Agency

KO

English:

Upper Intermediate

Kostiantyn O.

vetted by Youteam

Vetted by YouTeam

Ukraine

UTC +02:00

Ukraine/Kyiv

English:

Upper Intermediate

Proficient Full-Stack Developer .NET | SQL | React.js

A Full-stack Software Engineer with 10+ years of expertise in developing web and desktop applications using the Microsoft .NET framework. ● Skilled in initiating projects from scratch, architecting solutions, refactoring, and optimizing existing code. ● Proficient in popular JavaScript frameworks, including AngularJS, Angular 2+, React, and React JS, Nest JS. ● Experienced in designing and optimizing database structures. ● Adept at collaborating in Agile (SCRUM) teams and adhering to best IT industry practices, such as Unit Testing and Code Review. ● Possesses a strong background in analyzing, reorganizing, and refactoring legacy applications with minimal disruption to end-users. ● Upper-Intermediate English level

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Expertise

Years of commercial development experience

10 years of experience

Core technologies

.NET 10 years
ASP.NET 10 years
SQL 5 years
React.js 4 years
JavaScript 4 years

Other technologies

Agile
ASP.NET MVC
C#
jQuery
MongoDB
ADO.NET
Entity Framework
Git
NHibernate
Angular 2x
MS SQL Server
ASP.NET Web API

Project Highlights

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Senior Back-End Developer

Cesar Slots Casino

Sep `22 - Apr `23

7 months

Playtika

Development of a Casino gaming functionality

Responsibilities & achievements

- Created new game functionalities - Resolved software issues - Integrated new assets

.NET
.NET Core
icon
Senior Full-Stack Developer

Banking system for white-label solutions.

Sep `21 - May `22

8 months

Dzing Finance

Development of a tailored banking system for w1ite-label solutions. Team Composition: 12 members - 7 Developers, 4 Testers, 1 Project Manager

Responsibilities & achievements

- Developed new custom white Label functionality - Enhanced the Web Admin Panel - Addressed and resolved software issues

AWS
.NET
PostgreSQL
React.js
Visual Studio
.NET Core
icon
Senior Back-End Developer

Rejnitiv

Dec `20 - May `21

5 months

Rejnitiv - a platform for performing the financial analysis. Team Size: 8 Developers, 2 Validators, 1 Project manager

Responsibilities & achievements

- Created new functionality for the financial analysis - Fixed bugs

AWS
.NET
Visual Studio
icon
Senior Back-End Developer

RewardMob

Jun `20 - Nov `20

5 months

RewardMob

RewardMob - a game platform for renting games for game developers Team size: 6 Developers, 1 Project Manager

Responsibilities & achievements

- Improved functionality for multi-user games. - Created t1e microservices using .Net for support third-party financial services. - Fixing bugs in existing services and refactoring code.

Azure
.NET
Visual Studio
icon
Senior Full-Stack Developer

Paragonex

Dec `19 - Jul `20

7 months

Paragonex

Paragonex - one of the biggest fintech companies in Israel. Team Size: 26 Developers, 12 back-office, 14 Web, 2 Project Managers

Responsibilities & achievements

- Created React/TypeScript components using Visual StudioCode to support new functionality. - Refactored existing components using Visual Studio Code. - Created new Web API controllers using Visual Studio 2019 to support new functionality.

.NET
Oracle
React.js
Socket.IO
TypeScript

Education

Higher education in Computer Science

Agency

Web & Mobile Application Dev agency #158

10-50

GMT+2

Zaporizhzhya/Ukraine, Kiev Ukraine

Core Expertise

ActionScript
AngularJS
Apache
Apache Cordova
AWS
Backbone.js
CSS
D3.js
Ember.js
Express.js
HTML5
Java
Java EE
JavaScript
jQuery
Knockout.js
Kotlin
Kubernetes
Magento
MEAN Stack
Meteor
MongoDB
MySQL
.NET
Node.js
PHP
React.js
React Native
Responsive Web Developer
TypeScript
UI
UX
WordPress
Apache Cassandra
Bootstrap
CSS3
ECMAScript
Ecommerce
Elasticsearch
Go
Golang
HTML
Java ME
MySQL Programming
NoSQL
Redis
Swift
Web Services
Adobe Illustrator
Adobe Photoshop Lightroom
Angular 2x
ES6
jQuery UI
MS SQL Server
Npm
RESTful API
UI Bootstrap
WebSockets
Bootstrap CSS
Docker
MariaDB
jQuery plugins
MySQLFront
Redux
ES5
Ethereum
Solidity
Vue.js
UIKit
UI Automator
AWS SDK
Mongoose
Blockchain
Flutter
AWS Lambda
Redux-saga
Vuex
Vuetify
Next.js
Nuxt.js

Industries

Architecture & Design, Education & Science, Business & Productivity, Logistics & Transportation, E-Commerce & Retail, Banking & Finance, Information services & Technologies, Entertainment & Games, Mapping & Navigation, Sports & Fitness, Advertising & Marketing, Shopping & Loyalty programs, Photo & Video, Fashion & Style, Travel & Tourism, Kids & Childcare, Healthcare & Medicine, Food & Drink, Arts & Culture, Service & Support, Audio & Music, Blockchain & Cryptocurrency, Automotive

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Check if Kostiantyn is available