Profile image of KonstanBer
Flag of Ukraine Molochansk, Ukraine
Member since May 6, 2019
1 Recommendations


Online Offline
Good day. Thank you for considering my profile. I have been developing iOS & Android apps & Web over 8 years. "Let Satisfy the client with great result and fast speed" is my motto. As a PRO developer, I'll do my best responsibility for you and your work. ■ My major skills for development ★ Mobile app - Android(Java,Kotlin) and iOS(swift, obj-c) - Hybrid(Ionic, React Native...) - Dating, Chatting, Fitness and many more ... ★ Database - Firebase, MySQL, MongoDB and many more ... ★Web - ES6, React, Angular, Vue.js, webpack ... - javascript, Bootstrap, CSS ... - Laravel, core PHP ... - node.js ★Game - unity3D&2D, cocos2D&3D... ★3D Design - 3Ds Max, Maya, Solidworks, AutoCAD... ★Other skills -c, c++, c#, qt ... ★ my benefits - I will change our work time to your time zone - Responsible communication for each day(24/7 online). - Version Control (Git, Github, Gitlab) Best Regards.Sergey.
$40 USD/hr
15 reviews
  • 93%Jobs Completed
  • 98%On Budget
  • 98%On Time
  • N/ARepeat Hire Rate


Recent Reviews

  • image of Otto L. Interactive SVG/JS map €120.00 EUR

    “Made a great job with the map and fixing my code”

  • image of Nico M. I need a Wear Os alarmclock €222.00 EUR

    “Very friendly and good work.”

  • image of Abdellah I. build a dating App $248.00 USD

    “Sergey is absolutely one of the best developers I worked with, he is a flame of creativity. Without a doubt. He is not only do the assignment, he does research, spends time in understanding and suggesting the tips.. Just hire him and you’ll agree! Thank you very much indeed Sergey”

  • image of Philbert K. Mobile app adjustments $250.00 USD

    “He is an A+++++ Developer, Very very skilled and patient. He understands the language well and has taken me through first stage. Looked through my entire code for FREE and gained such good knowledge and we are working great! I will hire again.”

  • image of Paul B. Conversion of MS Access Forms into HTML/SQL Server platform £80.00 GBP

    “Sergey did everything he could to deliver to my budget but there was just too much for him to be able to cram it all in. We reached and excellent compromise and both walk away happy. I would recommend him to others without reservation. Very straightforward and honest.”

  • image of Lee L. Finger movement measurement $2100.00 HKD

    “I strongly recommend Sergey as he was very patient to listen to my need though I could not explain my requirement very clear at the beginning. Moreover, he was a very skill in write Android App. Thank you”


Senior IOS & Android Expert

Jan 2013 - Dec 2018 (5 years)

Rich experience in body building and delivery service app which are on AppStore now.

Experiencd Team Leader

Jun 2011 - Jan 2013 (1 year)

In this company, I took my position as a team leader of 10 [login to view URL] had developed many web projects which are related to ROR and Mean stack , Laravel, Yii and are large in size.I also had to make them sales in market. Also I had faced android and iphone technology and for past 3 years we had many apps developed with java for android and swift && objectiveC for IOS.

3 years in Web development.

Jan 2007 - Dec 2010 (3 years)

Excellent experience with.


Bachelor Degree of Computer Science

2005 - 2010 (5 years)


2016-17 Golden Apple Awards (2017)

Golden Apple Honoree Flynn Elementary School

EDU Clare Public schools foundation

Microsoft Certified Application Developer (2011)


Transcript ID: 664778 Access code: programmer [login to view URL]


IOS & Android

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