Cross-Platform VoIP & Messaging App Frontend Developer

₹250000-500000 INR

Closed

Posted 4 months ago

₹250000-500000 INR

Paid on delivery

Job Description: Frontend Freelance Developer – SIP/VoIP & Messaging (Coimbatore, India) About the Role: We are looking for a Frontend Developer experienced in cross-platform SIP/VoIP & XMPP messaging applications for Android, iOS, Windows, and macOS. The ideal candidate should have expertise in Secure WebRTC, SIP over WebSockets (WSS); native SIP, and native XMPP real-time messaging, and secure communication protocols using modern frontend frameworks that support single-codebase deployment. Key Responsibilities: • Develop a cross-platform UI for VoIP and messaging applications. • Implement Secure WebRTC (audio/video calls), SIP over WSS, and real-time messaging. • Implement Secure WebRTC (audio/video calls), SIP over WSS, and real-time messaging. • Deep working knowlegde of native SIP • Deep working knowledge of native XMPP • Implement secure communication with TLS, SRTP, DTLS, and end-to-end encryption. • Integrate push notifications for VoIP calls and messages. • Integrate push notifications for XMPP messages. • Optimize performance for low-latency media streaming and real-time messaging. • Debug and resolve SIP/WebRTC/messaging-related frontend issues. Required Skills: • Cross-Platform Development: Experience in React Native, Flutter, .NET MAUI, Tauri, Electron, Qt/QML or equivalent, as may be required to deliver business objetcives. • VoIP & Messaging Technologies: SIP, WebRTC, Secure WebSockets (WSS), STUN/TURN, XMPP, or Matrix Protocol. • Security & Optimization: TLS, SRTP, DTLS, background call handling, and push notifications. • Tools & Deployment: Git, CI/CD, cloud services (AWS, Firebase, Azure). Preferred Qualifications: Experience with PJSIP, Linphone SDK, JSSIP, [login to view URL]; WebRTC Experience with XMPP Experience with SIP, SDP, ZRTP, SRTP Prior work in real-time communication and messaging applications. Strong understanding of multi-platform UI/UX best practices. Who Should Apply? • Freelancers based in Coimbatore, India. • Developers with proven experience in cross-platform SIP/WebRTC/messaging frontend development. How to Apply: Send your GitHub/portfolio links, freelance profile, and resume. Best, NitoVille INC

Android

Mobile App Development

iPhone

Java

VoIP

Project ID: 39218569

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Active 3 mos ago

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19 freelancers are bidding on average ₹335,857 INR for this job

@debkumarlab

Landing the perfect cross-platform VoIP and messaging app isn't just about hiring a competent coder. It's about finding someone who has the right skillset as well as a true appreciation for your unique business objective. My name is Deb, and I am not only an expert in technologies such as SIP, WebRTC, and Secure WebSockets - which are essential for your project - but also a reliable person who places great focus on availability and adaptability: two critical traits for freelance work! For added assurance, I have successfully employed several complex cryptographic protocols like TLS, SRTP, DTLS and practice end-to-end encryption in many of my previous projects. With a commendable track record and proficiency in multitasking across various technologies like React Native, Flutter which are appropriate for your needs, trust that I can complete your project successfully. I've deployed robust security measures while effectively integrating push notifications for VoIP calls and messages using cloud services (AWS, Firebase, Azure) - another prerequisite of this role stated in the job description. Lets connect to discuss in details. Regards, Deb K

₹500,000 INR in 45 days

4.8

(13 reviews)

5.3

@krishbusiness005

With my extensive background in Full-Stack Development and Design, I confidently present myself for your consideration in the capacity of Frontend Developer for your cross-platform VoIP and messaging app. Having dedicated 8+ years to this field, I bring a wealth of experience and an understanding of the unique challenges that integrated communications systems face. My past projects include Building ERPs, CRMs, HRMs, and LMSs emphasize my ability to deliver high-performance, scalable, and user-friendly solutions tailored specifically to your needs. Moreover, I understand and value the importance of security in any app dealing with confidential data, which is why my skills extend to implementing secure communication protocols such as TLS, SRTP, DTLS. Overseeing all these efforts are my expertise in Git, CI/CD methodogy as well as cloud services like AWS/Azure/Firebase which guarantee streamlined collaboration and efficient progress tracking from my end. Therefore, if you're looking for professionalism without compromising on innovation or adaptability to the requirement – let's not miss out on this opportunity to collaborate!

₹250,000 INR in 10 days

5.0

(5 reviews)

3.5

@Synapseco

Hi there As Synapse India, we have extensive experience in developing cross-platform SIP/VoIP & XMPP messaging applications using React Native, Flutter, and Electron. Our expertise includes Secure WebRTC, SIP over WSS, and end-to-end encryption to ensure secure and seamless real-time communication. We can optimize performance for low-latency media streaming, integrate push notifications, and debug SIP/WebRTC issues efficiently. We are SynapseIndia, and you can trust us for our 23+ years of success in the industry, with over 18,000 projects and 5 million+ hours delivered. Our top clients include IBM, Johnson & Johnson, PayPal, Audi, and Nestlé. We adhere to ISO-certified CMMI Level 3 standards throughout the SDLC. Why choose SynapseIndia --> + Successful journey of 23+ years In Industry + 100% Job success and Top Rated Plus agency on Upwork + Our top clients include IBM, Johnson & Johnson, Paypal, Audi, Nestle, and others. + Microsoft Gold Certified Partner + ISO certified CMMI Level 3 Standard followed throughout the entire SDLC Note: The bidding price and timeline are provisional. The final cost will be determined after a detailed discussion. Sincerely, SynapseIndia I.T. Outsourcing @ Peace of mind An ISO 9001|27001|27701 Company "Outsourcing @ Peace of mind"

₹375,000 INR in 50 days