Profile image of Olegk0204
Member since November 28, 2017
4 Recommendations


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Welcome to my profile! I am Oleg Kovalchuk and living in Lviv of Ukraine My skills and experiences; ► Native iOS/Android (Swift, Objective-C, Java, Kotlin) ► Hybrid iOS/Android (React Native, Xamarin, Ionic) ► C++, C#, C, Java, Fortran, Pascal, VBA ► Bitcoin, Dash, Litecoun, Ripple etc ► AngularJS, React.js, Laravel, Codeigniter & RoR ► Node.js, PHP and Java ► Python using Flask & Django ► cocos2D, Unity 3D For Game App Development ► Database : PostgreSQL, MySQL, MongoDB, DynamoDB, SQLite, Neo4J ► CloudPlatform : Google Cloud Platform , Amazon Web Service, Microsoft Azure, Heroku, Firebase, QuickBlox Important Notes - Delivering top quality with professional service - Always work with creativity and fast-paced development - Devoting my full-time, since this is my full-time position. I work as an individual, supporting full-time. I'm here to analyze your ideas and requirements and offer our vision of project realization. With Regards.
$40 USD/hr
26 reviews
  • 88%Jobs Completed
  • 91%On Budget
  • 72%On Time
  • 14%Repeat Hire Rate


Recent Reviews

  • image of vw6735592vw Project 16759930 has been deleted $50.00 USD

    “no comments”

  • image of e4eric Fix existing progam - VS2015 c++ sql $155.00 USD

    “Good coder but was unable to finish project.”

  • image of solutionmanager3 Project for Olegk0204 $100.00 USD

    “It's just amazing to work with Oleg. Strongly recommend him for any kind of projects. Hopefully looking forward to having a long term partnership”

  • image of diegotowerss Save received audio streaming for Olegk0204 $30.00 USD

    “Really committed to complete the task”

  • image of Guardio Complete wp/woo commerce website kr3555.00 SEK

    “Really poor communication skills. did not deliver on time, and what was delivered was of really poor quality. No sense of quality. Asked me to test things as he was "done" but it took less than 10 seconds to see that he was far from done. Asked him basically on daily basis to discuss the development and explain requirements if anything was unclear but Oleg was not interested of that. His mantra was "Dont worry, I will deliver perfect website by deadline"... Guess what. One day before deadline he contacted me and requested to end the contract because he is unable to complete the work. Really unprofessional! Avoid working with this guy. Just waste of time”

  • image of e4eric Bug fix - VS2017 $45.00 USD

    “Excellent work.”


Staff Hardware Engineer/senior Staff Electronics Engineer

Oct 2016 - Jun 2017 (8 months)

Modified and designed a Gigabit Ethernet Card on an Edge Router System. Guided integration of Broadband Communication system with thermal, functional and EMI testing. Verified and integrated FPGA code on OC3-POS HULA for Edge Router System. Modified OC12-POS FPGA loader Verilog code for Gigabit Ethernet Card. Created and edited test documents for functional testing of Gigabit Ethernet Card.

C Programmer

Jun 2016 - Oct 2016 (4 months)

Communications programming using Crosstalk Installed and configured version control software Wrote programs to automate tasks on the AS400

Google Analytics - Management API

Apr 2015 - Nov 2015 (7 months)

I have experienced to improve or re-programming company current script.

Linux Engineer

Apr 2013 - Aug 2014 (1 year)

Evaluating remote site current network infrastructure and monitoring network utilization and troubleshooting problems. Build, configure and deploy VMs and templates. Completed Physical-to-Virtual (P2V), Virtual-to-Virtual (V2V) and Virtual-to-Physical (V2P) migration of Linux servers from VMware, Xen, and legacy hardware. Designed and implemented network upgrades for projected network growth, maintaining network bandwidth as per requirement.


Master of Computer Applications (M.C.A)

2007 - 2011 (4 years)


  • iPhone Development 1
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