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My Bass44 Android app already handles user accounts and general telephony UI, but the voice channel itself still relies on a placeholder SIP stack. I now want to swap that out and connect directly to Telnyx so users can place and receive real calls from inside the app. Here is what I need from you: • Wire the Telnyx voice-calling SDK or raw SIP/WebRTC endpoints into the existing Android codebase. • Implement secure authentication with my Telnyx account, handle inbound and outbound call flows, and expose simple callbacks so my UI can update on ringing, answered, muted, held, and ended states. • Provide brief build/run documentation plus any configuration files required for future environments. I will share the current repository and my Telnyx credentials once we agree on scope. When you respond, please point me to past work—links, APKs, or repos—where you have done similar VoIP or Telnyx/Twilio/SIP integrations on Android. That evidence will be the main factor in my selection. Acceptance is straightforward: I can install the debug build, tap “Call”, hear the remote phone ring, answer from another device, talk for at least 30 seconds with clear audio in both directions, and see the call gracefully terminate without crashes or lingering audio threads.
Project ID: 40286039
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Swapping your placeholder SIP stack for Telnyx's native Android SDK is exactly the kind of integration I specialize in—I've built production VoIP layers on Android using both Telnyx and Twilio, handling oAuth-based credential management, WebRTC oudio routing, and full call-state machines. My approach: I'll integrate the Telnyx Voice SDK, configure SIP credential authentication against your account, and implement a clean callback interface exposing ringing, answered, muted, held, and ended states that your existing UI can bind to directly. I'll ensure proper oudio focus handling, oudioManager routing, and oudioThread cleanup so calls terminate gracefully with no oudio leaks. I can start immediately once you share repo access and credentials, and I'll include build/run documentation covering oAll environment-specific configuration.
$10 USD in 1 day
4.6
4.6
12 freelancers are bidding on average $22 USD for this job

Hi Mate , Good morning! I’ve carefully checked your requirements and really interested in this job. I’m full stack node.js developer working at large-scale apps as a lead developer with U.S. and European teams. I’m offering best quality and highest performance at lowest price. I can complete your project on time and your will experience great satisfaction with me. I’m well versed in React/Redux, Angular JS, Node JS, Ruby on Rails, html/css as well as javascript and jquery. I have rich experienced in Debugging, Twilio, VoIP, WebRTC, API Integration, Android, SIP, Mobile App Development, Asterisk PBX and Documentation. For more information about me, please refer to my portfolios. I’m ready to discuss your project and start immediately. Looking forward to hearing you back and discussing all details.. Thanks for giving opportunity
$25 USD in 4 days
4.0
4.0

As an Android developer with extensive experience in mobile application integration, I am confident that I am the best fit for your project to integrate Telnyx Voice into your Bass44 app. I have a proven track record of successfully integrating Twilio/SIP systems in several of my past projects, allowing me to familiarize myself with various SDKs and endpoints. Given that understanding, implementing the Telnyx voice-calling SDK or raw SIP/WebRTC endpoints into your existing Android codebase is an achievable task for me. In addition to this, I understand the importance of your project-specific requirements. Secure authentication, inbound/outbound call flows, UI callbacks tied to ringing, answered, muted, held, and ended states are all aspects that I am well-versed in from my past VoIP integration projects. Creating a clean and seamless user experience is my highest priority By continually keeping up with the changing technological landscape, I can assure you that I am well aware of the nuances and updates in telephony integration dynamics, whether it's Telnyx or any other service provider. Building functional and robust applications is my forte. With me on board, you can rest assured that the final deliverable will meet all your expectations—a stable debug build with reliable audio quality for uninterrupted calls. Let's make this app "rock" when it comes to seamless calling! (Please rest assurence that Aditya Prasetya is a pseudonym and not using real name for security reasons)
$20 USD in 2 days
2.8
2.8

Hello, I can do the work as I have experience integrating VoIP services like Telnyx into Android apps. I have successfully completed similar projects in the past and delivered great results. I am confident that I can wire the Telnyx voice-calling SDK or raw SIP/WebRTC endpoints into your existing Android codebase, implement secure authentication, handle call flows, and provide the necessary documentation for future environments. Please start the chat so we can discuss the project further and address any questions I may have. Thanks, Rohaan Sheikh
$30 USD in 7 days
1.0
1.0

Hi, I would like to grab this opportunity and will work till you get 100% satisfied with my work. I just applied after read your job posting carefully and I believe that I am good fit to your project. I'm a serious bidder. I will satisfy you with my high skills! I am an expert which have 8+ years of experience on Mobile App Development, Android, Asterisk PBX, VoIP, Debugging, Documentation, Twilio, API Integration, SIP, WebRTC I am looking forward to meet you to discuss the further detail about this project. Looking forward to hearing from you. Thank You
$25 USD in 7 days
0.0
0.0

Hi, I see you want to replace the placeholder SIP stack in your Bass44 Android app with a real Telnyx voice-calling integration. You need the voice channel wired to Telnyx’s SDK or raw SIP/WebRTC endpoints, with secure authentication and call state callbacks for your UI. Specifically, you want inbound and outbound call flows handled smoothly, with clear states like ringing, answered, muted, and ended exposed to the UI. You also require build and run documentation plus configuration files for future environment setup. Ensuring clear audio during calls and graceful termination without crashes is a must. I have integrated VoIP solutions using SIP and WebRTC on Android apps, including Twilio and Telnyx SDKs. In one project, I replaced a placeholder SIP stack with Telnyx’s SDK, enabling secure auth and reliable call state management, along with detailed documentation for deployment. This experience aligns directly with your needs for Bass44. I can complete this integration with testing and documentation within 5 days. Let’s discuss how I can tailor the solution to your repo and Telnyx setup.
$11 USD in 7 days
1.1
1.1

✔ I deliver 100% work — 99.9% is not for me. ✔ Workflow Diagram Current Android Codebase ⟶⟶ Telnyx SDK / SIP Integration ⟶⟶ Authentication & Call Flow Setup ⟶⟶ UI Callbacks Hooked ⟶⟶ Audio & Connection Testing ⟶⟶ Debug Build Delivery & Documentation Key Highlights ✔ Telnyx Voice Integration — full inbound/outbound call support via Telnyx SDK or raw SIP/WebRTC. ✔ Secure Authentication — safely connect each user to your Telnyx account, manage tokens, and maintain session integrity. ✔ Call Flow Management — handle ringing, answered, muted, held, and ended states with callbacks exposed for UI updates. ✔ High-Quality Audio — stable 1:1 calls with clear audio in both directions, including 30+ second live test verification. ✔ Seamless Android Integration — hooks into your existing Bass44 user accounts and telephony UI without disrupting existing functionality. ✔ Documentation & Configuration — build/run instructions, configuration files, and environment notes for future updates. ✔ Debug Build Delivery — installable APK for immediate testing on real devices. Best Regards, Asad Android & VoIP Developer | Telnyx / SIP / WebRTC Integrations
$20 USD in 1 day
0.0
0.0

Hi there, I would love to help. I’ve integrated real-time calling stacks into Android apps, including SIP/WebRTC style call flows, and I’m comfortable swapping a placeholder telephony layer for a production VoIP provider like Telnyx while keeping your existing account system and UI intact. The tricky part is always audio focus, lifecycle handling, and thread cleanup, so the app doesn’t leak audio sessions or crash after hang-up, especially when backgrounded. For Bass44, I’ll replace the placeholder SIP stack with Telnyx voice integration, implement secure auth with your Telnyx credentials, and wire inbound and outbound call flows end to end. I’ll expose clean callbacks or a listener interface so your UI can update instantly for ringing, answered, muted, held, and ended states, and I’ll ensure proper handling of permissions, audio routing, and app lifecycle transitions. After that, I’ll provide build and run notes plus environment configuration so you can deploy to future environments safely. I can share similar Android VoIP integration work in chat as soon as we connect, including repos or APK examples where I implemented calling state callbacks and stable audio handling. Thank you, Shaun
$30 USD in 3 days
0.0
0.0

As a seasoned full-stack developer with advanced skills in API integration and an extensive Python background, I believe I'm the ideal candidate for your Bass44 Android app project. While my focus has mainly been on web and AI development, I have substantial expertise in backend development using Python frameworks like Django and Flask. This means I'm well-versed in handling APIs, logical integrations, and can effectively implement your desired functionalities. Regarding your project's specific requirements, I have previously executed several similar VoIP integrations, making me fairly familiar with SIP protocols, SDKs like Telnyx/Twilio, and the fundamentals of call flows. As a result, I am confident that I can not only wire up the Telnyx voice-calling SDK or raw SIP/WebRTC endpoints into your Android codebase seamlessly but also ensure proper authentication, handle inbound/outbound call flows and expose reliable callbacks to update the UI status based on ringing, answered, muted, held or ended states. In addition to my relevant skills and experience, what sets me apart is my commitment to delivering top-quality work within set deadlines. You can expect well-commented code that's easy to maintain by other developers as well as detailed build/run documentation with necessary configuration files at the end of our successful collaboration.
$20 USD in 7 days
0.0
0.0

Hi there, I understand you need the placeholder SIP stack in your Bass44 Android app replaced with a real Telnyx voice integration — handling secure authentication, inbound and outbound call flows, and clean UI callbacks for ringing, answered, muted, held, and ended states — with a passing acceptance test of a clear 30-second two-way call terminating cleanly without crashes or lingering audio threads. I have integrated Telnyx and Twilio VoIP SDKs into Android applications, implementing WebRTC-based call flows with proper audio session management, inbound push notification handling for incoming calls, call state callbacks wired to existing UI layers, and environment-configurable credential setups — delivering debug APKs verified against exactly the kind of acceptance criteria you've described. I'll wire the Telnyx Android SDK into your existing codebase replacing the placeholder stack, implement secure credential handling, inbound and outbound call flows with all required state callbacks, clean audio thread teardown on call end, and deliver build and configuration documentation for future environments alongside the working debug build. I can start the work immediately and am happy to work long term. Thanks.
$20 USD in 7 days
0.0
0.0

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