Oleg Kostenko - Hire at Ithire

Oleg Kostenko


  • Hourly Rate$25-35 / Hr
  • Total Earned$40560
  • Experience9 Years


  • HTML5
  • JavaScript
  • jQuery
  • Ajax
  • Wordpress
  • PHP
  • MySql
  • Laravel
  • Codeigniter
  • C++
  • Java
  • Python

Full Stack Web and Mobile developer

Hello ! I am a highly rated and achieving Full Stack Web Developer with 9 year experience in industry. I am skilled at making single page applications and progressive web apps with the extended ecosystems that allow your software to operate on multiple devices. I utilize ReactJS, VueJS, AngularJS, HTML5, JavaScript, and other flexible and powerful techniques to create reliable, fast and engaging web apps. Dedicated to building and optimizing the performance of user-centric, high-impact websites for personal and corporations. Leverage technical, analytical and problem-solving skills to create dynamic, high-speed websites and backend for mobile/web apps. I continuously improve my skills, learn new approaches, best practices and technologies, so you can be sure I will pick the best tools that fit your project needs. - React/React Native/Redux, AngularJS/Angular/Ionic, Vue.js/Vuex - Javascript ES 6/7, Typescript, HTML5/CSS3, SCSS/LESS - Node.js/Express/Koa/Hapi/Meteor/Loopback - Python/Django/Flesk - Serverless, Microservices, AWS Appsync, GraphQL/Apollo, Amplify CLI, Docker - MongoDB, Postgres, MySQL - Firebase Cloud Function, Firebase Real-time Services - AWS Lambda, EC2, Elastic Beanstalk, DynamoDB, RDS, Redshift - Twilio, Nexmo, RingCentral, MessageBird - IBM Watson, Amazon Lex, Alexa, Rekognition, Google Dialog Flow Let’s build a fast, scalable app, and grow your business together! Thanks.


  • Master's degree, Computer science

    University of West London


Front end React developer

December 12, 2019 - December 25, 2019

70 Hours | $25 / hr

Oleg is a talented developer. He helped greatly on our react project. He was able to deliver on all requirements successfully.

Full Stack React, Redux, Node , Mongo DB Expert

February 4, 2020 - February 19, 2020

85 Hours | $25 / hr

Fluent communication. Excellent work. Will hire again. Thanks Oleg !

Back end developer to work on single page web application

March 16, 2020 - March 29, 2020

75 Hours | $26 / hr

Oleg is a very talented developer. He has done great work as a team member. He is very skilled, communication is appreciable, cooperation and dedication were excellent. I will hire him again.

WordPress Multisite - Backend and Frontend Custom Work

April 9, 2020 - April 18, 2020

60 Hours | $25 / hr

Oleg was great - high level of skill, ready to take on large jobs, very organized! Highly recommend to everyone!

IOS and Android social media app

May 1, 2020 - May 22, 2020

110 Hours | $26 / hr

He is an outstanding developer who gets things right the first time and always has follow-up questions to my requirements. I will continue to reach out to Oleg for future projects as I know I will get quality work done.

Strong jQuery developer with exposure to ASP.NET

June 9, 2020 - June 25, 2020

95 Hours | $25 / hr

Oleg is a brilliant bloke and a capable developer. He sticks to the agreed schedule and does a great job. Definitely recommended.

Some changes to my Ruby project

July 17, 2020 - July 28, 2020

65 Hours | $25 / hr

He is excellent to work with. He met all deadlines and exceeded our expectations. On-time and on-budget. Will definitely hire Oleg again.

Linux app development

August 1, 2020 - August 15, 2020

80 Hours | $26 / hr

Oleg is an exceptional developer. One of the very few who went out of his way to schedule weekly catch-ups to show me his progress and always asked questions if he wasn't sure about anything.

Flutter developer for my app

September 25, 2020 - October 16, 2020

120 Hours | $25 / hr

Thank you Oleg. Quick, professional, and got the job done right. A good freelancer to count on and work long term with. He is a pleasure to work with and I will likely have additional work for him in the future.

Ecommerce store developer

November 1, 2020 - November 12, 2020

60 Hours | $24 / hr

Oleg is a very skillful and hard working developer. He always over-delivered the work.

Jira project

November 17, 2020 - December 3, 2020

95 Hours | $25 / hr

He is a spectacularly good programmer. He took a very complex project, with unique functionality and a fussy client, and created clean, brilliant code to achieve remarkable results. I will definitely rehire Oleg.

Expert Game developer

December 4, 2020 - December 20, 2020

80 Hours | $26 / hr

Working with Oleg has been a great experience - he is a very skilled developer who not only puts into practice what you have in mind, but he takes it and turns it into something even better. I am going to work with him again on another project and I highly recommend him.

IOS and Android app development

December 28, 2020 - January 20, 2021

130 Hours | $26 / hr

Definitely coming back to this developer in the future - He did a great job! Thanks Oleg.

Jitsi expert is needed

February 6, 2021 - February 21, 2021

80 Hours | $25 / hr

Oleg is awesome. If you want a reliable and experienced developer don't hesitate hire him ASAP !!!

Project management software

March 3, 2021 - March 18, 2021

90 Hours | $26 / hr

Oleg did an amazing job. He is very professional and I am really impressed. He is very reliable and we made great friends. Thanks for your efforts Oleg and for such a great collaboration.