Sergei Kvasov

Sergei Kvasov

iPhone, iPad, iOS, Mobile Senior Developer

Minsk, Belarus



What's the difference?

Hello, my name is Sergei. I am an iOS developer.

I have a good knowledge of:
- Objective C, xCode, Cocoa, strong base in OOP
- Mobile UI/UX
- Mobile security and QA
- Agile development
- Domains: business apps, social networks, location services, full cycle development from scratch

I'm always aimed at solving your problems and achieving results.

Fluent written and verbal english skills.

Best regards, Sergei.

Work History & Feedback

Publish iPhone App

“Thank you so much! Appreciate the extra effort to help me work through complications in the project as they came up. Highly skilled, very professional, absolutely recommended!”
14 hrs @ $16.67/hr
Earned $337

Iphone/Android for 35 Questionnaire

“Absolutely outstanding resource. Very professional, extremely knowledge and very helpful. Sergei and his team have cemented our relationship, and we will continue to use him for future app projects.”
11 hrs @ $11.11/hr
Earned $126

iPhone app: scan VIN barcode + display data from our API

“Extremely professional and skilled phone developer. Fantastic UI and willing to work through each concern. Highly recommended!”
Fixed Price $111

Project Cleanup - iPad App

“Sergei was fantastic to work with; the quality of the app created was excellent. I would definitely hire him again, and I definitely recommend him to anyone else looking for a qualified developer (:”
Fixed Price $167

iOS developer for Internet Of Things project

No feedback given
3 hrs @ $27.78/hr
Earned $83
Tests Taken
Name Percentile Score

Adobe Flex 3.0 Test


iOS Programming Test


iPhone Programming OS 4.0 Test