Senior iOS Developer – VoIP

5 days ago

Bengaluru Delhi Mumbai NCR, India Int9 Solutions Full time ₹ 15,00,000 - ₹ 25,00,000 per year

About the Role

We are seeking a highly experienced iOS developer with deep expertise in Swift, real-time communication (VoIP/RTC), and modular app architectures. You will lead the development of production-quality UCaaS/CCaaS mobile applications, focusing on VoIP, low-latency audio/video, and scalable architectures.

Location: Remote (India),Delhi NCR, Bangalore, Chennai, Pune, Kolkata, Ahmedabad, Mumbai, Hyderabad

Must have some overlap with Portugal timezone

Key Responsibilities

Develop, maintain, and optimize iOS mobile applications for real-time audio/video communication.

Implement features using Clean Swift (VIP), MVVM, or VIPER architectures.

Integrate and troubleshoot CallKit, PushKit, and other VoIP/RTC flows.

Collaborate with Android and Web teams to ensure consistent user experience across platforms.

Build and maintain CI/CD pipelines (Fastlane, Codefresh, or similar) and automated testing.

Monitor app stability and performance using Bugsnag, Crashlytics, or similar tools.

Mentor junior developers and share best practices.

Participate in agile workflows including backlog grooming, sprint planning, and estimation.

Core Requirements

5-8+ years of professional iOS development experience.

Strong proficiency in Swift and the iOS SDK.

Hands-on experience with modular architectures: VIP, MVVM, or VIPER.

Experience with VoIP/RTC features (CallKit, PushKit, audio/video optimization).

Solid understanding of networking, RESTful APIs, asynchronous programming, and background execution.

Preferred Skills

Experience with Twilio or Acrobits SDKs.

Familiarity with SIP and SFU architectures.

Experience setting up and managing CI/CD pipelines.

Exposure to app monitoring tools like Crashlytics/Bugsnag.

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