Senior / Lead iOS VoIP Engineer – UCaaS / Softphone

Hiring: Senior / Lead iOS VoIP Engineer – UCaaS / Softphone📍 Location: Hyderabad🏢 Company: Pranathi Software Services💼 Experience: 3–10+ Years⏱️ Employment: Full-TimePranathi Software Services is looking for an experienced Senior / Lead iOS VoIP Engineer with strong hands-on experience building and troubleshooting production UCaaS, SIP softphone, or WebRTC calling applications.Must-Have Skills:

• Swift, UIKit/SwiftUI
• CallKit & PushKit
• APNs VoIP Push Notifications
• SIP, RTP/SRTP & WebRTC
• AVAudioSession
• Background & terminated-state incoming calls
• Bluetooth/AirPods/audio routing
• Wi-Fi ↔ 4G/5G network handover
• SIP/WebRTC debugging & WiresharkExperience with Linphone SDK, PJSIP/PJSUA2, FreeSWITCH, Kamailio, FusionPBX or Asterisk is highly preferred.We specifically need someone who has personally built or maintained a production iOS softphone/UCaaS application and can troubleshoot issues such as missed incoming calls, one-way audio, call drops, PushKit/CallKit issues, SIP registration and network switching.Important: This is not a general iOS development role. Strong production VoIP/Softphone experience is mandatory.Interested candidates can apply or share your resume at giribabu@pranathiss.com