Requirements:

• 3+ years of experience in mobile applications development
• Strong Swift knowledge (5.x language level)
• Objective-C knowledge (at least on basic level)
• Strong knowledge of iOS SDK (iOS 12 and higher): specifically GCD, AVFoundation, CallKit, PushKit
• Knowledge of SIP protocol, experience working with VoIP SDKs (PJSIP, Linphone, Zoiper, Bria or others)
• C/C++ knowledge on a level enough to successfully integrate C code with Swift code
• English language: sufficient for written communication

Scope of work:

• Development of Swift wrapper around PJSIP VoIP SDK for iOS softphone application
• Design and development of necessary architectural updates for integration of newly developed wrapper into existing application code base
• Transfer all application calling features to new SDK wrapper
• Continuous enhancements to existing VoIP functionality

Conditions:

Saint-Petersburg office, the technological capital of the company, was founded in 2000 and is located close to the "Alexandra Nevskogo Square" metro station. We offer good salary, flexible schedule, social guaranties, open and friendly atmosphere, highly professional team, interesting tasks.