SaaS Softphone System Development

Job ID: 39253050

Budget: $750 – $1,500 USD

Job Description: VoIP & SaaS Softphone System Developer

About the Role

We are looking for an experienced VoIP & SaaS Developer to help build an MVP for a cloud-based softphone system. This system will allow small businesses to register, select a local phone number, choose a minutes plan, and deploy a fully functional VoIP solution accessible on both Apple and Android devices. The goal is to leverage third-party APIs to build the system efficiently while maintaining high performance and scalability.

Key Responsibilities
• Develop a VoIP-based SaaS softphone system with multi-tenant support for small businesses.
• Integrate third-party APIs (such as Twilio, Nexmo, Plivo, Telnyx, and others) for core functionalities including:
• Call making and receiving
• Phone number provisioning
• Speech-to-text (AI-powered call transcription)
• Call recording and management
• Call routing and forwarding
• Build a user-friendly dashboard for businesses to manage their numbers, minutes, and team accounts.
• Implement a subscription-based billing system, integrating with Stripe or another payment gateway.
• Develop a mobile-compatible solution for both iOS and Android (either via a web app, React Native, or Flutter).
• Ensure security and compliance, implementing encryption and data protection best practices.
• Optimize performance and scalability for future growth.
• Provide API endpoints for potential future integrations.

Requirements
• Proven experience building VoIP applications and working with SIP, WebRTC, or softphone technologies.
• Proficiency in backend development (Node.js, Python, PHP, or similar).
• Experience integrating third-party VoIP APIs (Twilio, Plivo, Nexmo, Telnyx, Bandwidth, etc.).
• Strong understanding of cloud infrastructure (AWS, Google Cloud, or Azure) for hosting VoIP services.
• Knowledge of mobile development frameworks (React Native, Flutter, or Swift/Kotlin for native apps).
• Experience with payment gateway integration (Stripe, PayPal, or similar).
• Familiarity with AI-based speech-to-text services (Google Speech-to-Text, Microsoft Azure Speech, IBM Watson, etc.).
• Understanding of multi-tenant architecture for SaaS applications.
• Strong problem-solving skills and ability to work independently.

Nice to Have
• Experience working with real-time communication technologies like Agora or OpenTok.
• Knowledge of AI-driven analytics for call insights.
• Experience developing IVR (Interactive Voice Response) systems.
Related categories: PHP Mobile App Development Android Asterisk PBX VoIP