Sergii A.
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Sergii A.

iOS Mobile Applications Developer, Architect, iOS/API Consultant


Kiev, Ukraine


To be an Expert in mobile development means to understand all the problems of the clients and find the best way to solve it with high quality. + More then 9 years of Engineer Experience, Architecture/API design + More then 5 years of Team and Development Process building experience + More then 4 years of Mobile experience + CEO and CTO + Successfully completed 24 mobile projects in the last 4 years + Mobile platforms practical knowledge (iOS, Android) + Managing teams (local and remote) and projects from scratch I mainly interested in long term relationship with my clients; ... moreenterprise and business level applications with emphasis on quality, good user experience, pixel perfect UI, security and stability. Will improve development processes in your teams through meetings, code review sessions, task management and code management, automate application complex building/deploying and other day-to-day tasks. Worked with big financial, e-comerce, business players to improve their development process and help to convert their ideas into implementation. MY CLIENTS: - Philips Ukraine ( - Ciklum UK Ltd ( - BörseGo AG ( - Westwing Home & Living GmbH ( - Eat W.L.L ( - Welppeper Inc. ( - Play Golf Planet Inc. ( - Fieldfolio Pty Ltd ( - RooM the Agency (https:// - Search Concepts AG ( - MEMIDIS Pharma ( - Daylene Christensen ( - G7 Research LLC ( - Royal Brompton & Harefield NHS Foundation Trust ( - Biruza Software ( - Qbix ( - Salepads AB ( - QCM France ( - M3W Inc. ( PORTFOLIO: SERVICES: - iOS/Android/Tablet/Watch applications and game development - Code review and bug-fixing for your projects - Consulting about better mobile practices, user interface practices, Apple App Store application submittion process, iTunes Connect account/applications management, TestFlight and beta testing, architecture design; contribute ideas for making your application(s) better and easier to use; keen eye for detail - Project management, continuos integration, unit-testing for your projects - Review and perform a technical analysis of requirements - Produce a solid, detailed technical design, write clean, modular, robust code to implement the desired requirements - Regular report of project status with relevant deliverables EXPERIENCE: - iOS versions 4.3 - 9.x, iPhone/iPad/iWatch applications, application Localization - Continuous Integration for big companies (auto build, auto documentation generation, configuration management, Jenkins, MonkeyTalk test cases, Appium, AmazonInsigts for A/B testing, etc) - Storyboards/xibs interface, MRR or ARC projects - JIRA, Confluence, JIRAConnect, Git, Svn, Jenkins, Ant - CocoaPods, TestFlight, SDWebImage/FastImageCache/TMCache - Web services integration (SOAP, REST, JSON, XML, XMLRPC), RSS, RestKit, AFNetworking - Social networks integration (Twitter, Facebook, LinkedIn, Thumblr,...) - Integration with data storages (iCloud, DropBox, - Push Notifications, Local Notifications, Events, UrbanAirship - Cocos2D and Kobold2D game engines - CoreAudio, CoreAnimation, Audio/Video streaming, QuickLook, QuartzCore, AddressBook - SQLite and CoreData, external storages, Amazon S3 - InApp Purchases, Paypal, E-commerce - Bar code and QR codes: RedLaser, ZBar - Advertisements: iAd Network, RevMob, MoPub, Google AdMob, Adwirl, TapJoy, Chartboost - Statistics: Google Analytics, Flurry Analytics, Localytics, TradeMob, AdXTracking, Google Conversion Tracking, Google Tag Manager, Google Universal Analytics - Image processing, OpenCV, Augment Reality - CoreLocation for navigation, efficient GPS regions monitoring, geoloqi - Apple App Store experience with publishing aps - Route-Me Offline maps and Google Maps API (MapKit), Foursquare - ; ... a lot more less

Sergii A. has added 30 portfolio pieces. Create an account to review them.

Work History and Feedback

  • Jun 2014

    Need help implementing properly push notifications on iOS
    Great quality of work!
    $334.00 earned
    Fixed Price

  • Oct 2013 - Nov 2013

    Update iPad app to RESTkit version 0.20 and minor additional works
    Sergey is very capable and easy to work with. We will be working with Sergey again in the future on other features we intend adding to our app.
    30 hours
    $27.78 / hr
    $842.66 earned

  • Oct 2012 - Apr 2013

    Expert MacOS Developer

    No feedback given

    90 hours
    $24.44 / hr
    $2,195.22 earned

  • Apr 2012

    Simple Mac desktop application in Xcode
    Sergey was great. He communicated well, understood what was needed and delivered on schedule.
    8 hours
    $11.11 / hr
    $88.88 earned

  • Apr 2012

    saving to nsuserDefult
    really good man do what i want to do and he is honest im looking to work with him again i dont think i will work with someone else after this man really great jib and fast
    $10.00 earned
    Fixed Price

Sergii A. has more jobs to show. Create an account to review them.


Name Score (out of 5) Time to Complete
Facebook Connect Test 3.75 Top 20% 40 mins
iPhone Programming OS 2.1 Test 3.60 Top 30% 50 mins
Programming with C Test 3.90 Top 10% 38 mins
Programming with C++ Test 3.50 Top 20% 35 mins
Objective C Test 3.10 Above Average 22 mins
iPhone Programming OS 4.0 Test 4.00 Below Average 39 mins
English Vocabulary Test (U.S. Version) 4.25 Top 30% 29 mins
English Spelling Test (U.S. Version) 4.60 Above Average 21 mins
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Work History

100% Job Success
1,101 hours worked
21 jobs


As Needed - Open to Offers


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