
Closed
Posted
Telnyx VoIP / SIP Expert Required – Fix Web Portal, Mobile App & Multi-Tenant Infrastructure Project Description: We are building and operating a multi-tenant VoIP/UCaaS platform and need an experienced Telnyx + SIP + VoIP developer/technical engineer to troubleshoot and resolve existing technical issues across our backend, web portal, mobile applications, and VoIP infrastructure. This is an existing project, not a basic development project. We need someone who can understand the current architecture, identify the root causes, fix the issues, and help us stabilize the platform for production scaling. Key areas requiring support: Telnyx API integration and troubleshooting Telnyx SIP Trunking / SIP Connections SIP credential management Telnyx credential/connection limits and scalable architecture Multi-tenant VoIP architecture Provisioning large numbers of users/extensions Outbound and inbound calling Concurrent call handling and CPS requirements SIP registration and authentication Call routing and failover Telnyx phone number provisioning Call Control API / Voice API integration Webhooks and event handling Call logs and call history Call recordings SMS integration if applicable Billing and usage integration Customer/tenant administration Super Admin portal User/employee management Backend API issues Database/API synchronization Web portal bugs Mobile application calling issues Push notifications Call status synchronization Authentication/login issues Production server/infrastructure troubleshooting Performance and scalability improvements Current major requirement We are currently facing Telnyx connection/credential scalability limitations and need an expert who can review our architecture and determine the correct way to support a large number of customers/users without hitting Telnyx platform limitations. We are planning to scale the platform significantly, so the developer must understand how to design the architecture properly rather than simply applying a temporary workaround. Very Important – Telnyx Experience Required Please apply ONLY if you have personally worked with Telnyx before. We need someone with real hands-on Telnyx experience, preferably with: Telnyx SIP Telnyx Mission Control Portal Telnyx API Telnyx Call Control Telnyx credential connections SIP trunking Multi-tenant VoIP FreeSWITCH / FusionPBX WebRTC/mobile VoIP Production VoIP deployments Before awarding the project, please answer: Have you personally integrated Telnyx into a production VoIP platform? What Telnyx products/APIs have you worked with? Have you worked with Telnyx SIP Connections and SIP Credentials? Have you handled multiple tenants/customers with hundreds or thousands of users/numbers? Have you experienced Telnyx connection/credential limits? How did you architect around them? Have you worked with FreeSWITCH or FusionPBX + Telnyx? Can you troubleshoot SIP registration, INVITE, authentication, routing and call failures? Have you developed a VoIP mobile application using SIP/WebRTC? Please provide one real Telnyx project you personally worked on. Explain your role and what you implemented. Are you available for live technical troubleshooting sessions with our team? Important We are not looking for someone who will only write code from instructions. We need a technical engineer who can: Analyze → Identify root cause → Explain the issue → Implement the fix → Test → Document the solution. We can provide access to the existing codebase, server/infrastructure information, API documentation and Telnyx configuration where required. Long-term work is possible if the developer successfully resolves the initial technical issues. IMPORTANT: Please do not apply if you have never worked directly with Telnyx. We will verify your previous Telnyx experience during the technical interview. Generic VoIP experience alone is not sufficient.
Project ID: 40715040
22 proposals
Remote project
Active 1 hour ago
Set your budget and timeframe
Get paid for your work
Outline your proposal
It's free to sign up and bid on jobs
22 freelancers are bidding on average ₹981 INR/hour for this job

Hi, a Telnyx multi tenant platform that scales past the credential connection ceiling. What I'd do: stop mapping one Telnyx credential connection per tenant. FreeSWITCH as the registrar extensions hit, a small trunk pool to Telnyx behind it, outbound routed off a tenant DID map, inbound by DID into the same table, Call Control webhooks writing call state. How many tenants are live now? I've shipped SIP and WebRTC calling in production, voice in the UBL banking app. Happy to take a paid diagnosis session first. Regards, Zohaib
₹1,250 INR in 40 days
4.0
4.0

⭕⭕⭕Hello, there⭕⭕⭕ As an experienced and talented mobile app developer, my skills extend beyond just building scalable apps. My past projects have revolved around tasks similar to yours: working with large-scale infrastructure, troubleshooting complex VoIP issues, handling multi-tenant architectures, and precisely integrating APIs. I’m well-versed in Telnyx SIP Connections and freeSWITCH/FusionPBX that are key areas requiring support in your project. To ensure top-notch performance, I prioritize producing solutions that both rectify issues and address the root cause. Additionally, I'm highly-skilled in handling concurrent connections, provisioning users/extensions as well as managing credentials - all of which you mentioned are crucial to your project. Furthermore, my expertise extends to mobile VoIP using WebRTC technology which aligns perfectly with your requirements for the mobile app calling portion. In my previous Telnyx projects, I implemented architectural designs that supported a large number of customers/users like you aim to do. This included creating a call handling and CPS framework that operated excellently even at peak times. Additionally, my deep understanding of Telnyx's features allowed me to provide optimal solutions without hitting platform limits like connection and credential limitations - all of which you mentioned experiencing too. It's safe to say my proficiency will not only solve your problems but also help prevent t Thanks!
₹1,438 INR in 21 days
0.0
0.0

I can deliver 'Telnyx VoIP Expert for Advanced Troubleshooting & Scaling' end to end — clean architecture, tests, and deployment. I'll start with a short plan, share progress daily, and hand over production-ready code. Could you confirm your timeline and must-have features so I can lock the scope?
₹1,032.60 INR in 7 days
0.0
0.0

Hey ..... free for live Telnyx troubleshooting and can start today. I've shipped production multi-tenant VoIP/UCaaS on Telnyx (SIP, Call Control, Mission Control, webhooks) and fixed credential/connection scaling so platforms dont hit Telnyx limits with bad architecture. Ill audit then fix: SIP connections/credentials, multi-tenant provisioning, inbound/outbound + CPS, SIP reg/INVITE/auth/routing, webhooks, call logs/recordings, web portal + mobile calling sync, admin/tenant APIs. Q&A: 1) Yes ..... Telnyx in production multi-tenant VoIP. 2) SIP Connections, Telephony Credentials, Call Control/Voice API, numbers, webhooks, Mission Control. 3) Yes ..... SIP Connections + credentials daily. 4) Yes ..... large tenants/users/numbers via API provisioning. 5) Limits: not 1 SIP Connection per user. Parent connection/Call Control app + Telephony Credential per user/device; server-side JWTs for WebRTC/mobile; no shared creds (last reg wins). Scale with pooling, voice profiles, channel/CPS planning. 6) Yes ..... FreeSWITCH/FusionPBX + Telnyx trunks/failover. 7) Yes ..... SIP debug end to end. 8) Yes ..... mobile/WebRTC SIP calling + push/status sync. 9) Built multi-tenant UCaaS on Telnyx SIP+Call Control, per-user credentials, JWT auth, webhooks/CDR, portal provisioning. Role: architecture + integration + prod fixes. 10) Yes ..... live screen-share with your team. Rs.800/hr ..... award/message and share where it breaks.
₹800 INR in 40 days
0.0
0.0

Hi, I have hands-on experience with Telnyx-based VoIP platforms and can troubleshoot your existing system at the architectural level, not just patch individual bugs. I can review Telnyx SIP connections, credentials, API and Call Control integration, number provisioning, webhooks, call routing, authentication, call failures, mobile calling, and multi-tenant infrastructure. For the scalability issue, I would first analyze your current tenant, user, number, and connection architecture, identify the actual Telnyx limits involved, and design a scalable approach for large customer volumes rather than applying a temporary workaround. I follow a practical process: Analyze → Identify root cause → Explain → Fix → Test → Document. I am also available for live troubleshooting sessions and can discuss a real Telnyx project I personally handled, including my role and implementation, during the interview.
₹1,050 INR in 40 days
0.0
0.0

Your platform is already live, and the hard part is not building another SIP flow , it is finding why Telnyx limits, credential handling, and multi-tenant call routing are breaking at scale. I understand the real issue: you need a technical engineer who can trace failures across backend APIs, web portal, mobile calling, webhooks, and Telnyx SIP infrastructure, then fix the root cause instead of masking symptoms. I’d approach this by: - auditing Telnyx SIP Connections, credentials, and tenant isolation - tracing registration, INVITE, authentication, call routing, and webhook timing - checking database/API sync for call state, logs, recordings, and billing events - reviewing scaling patterns for CPS, concurrent calls, and connection limits My background is strongest in backend development and artificial intelligence, but this project clearly needs deep Telnyx-specific production VoIP experience. I would only proceed if the existing architecture, logs, and Telnyx configuration can be inspected live so the failures can be reproduced and resolved systematically. If you want, I can help structure the troubleshooting session, isolate the bottleneck, and document a scalable remediation plan for your team.
₹1,917 INR in 17 days
0.0
0.0

Your Telnyx connection/credential limit is probably an architecture problem, not a Telnyx problem. I’ve worked hands-on with Telnyx, SIP and multi-tenant voice infrastructure, including SIP connections/credentials, call routing, inbound/outbound calling, webhooks, provisioning, concurrency and backend integrations. I can troubleshoot the existing platform end-to-end: • Telnyx API / SIP Connections / credentials • SIP registration, authentication, INVITE & routing • Multi-tenant users, extensions & numbers • Call Control, webhooks & call-state sync • Concurrent calls / CPS • Backend, database & API issues • Production infrastructure & performance For your current limitation, I’d first trace how tenants, users, SIP identities, connections, numbers and voice applications are mapped. Then I’d identify the actual provider-resource bottleneck and redesign the allocation model rather than applying a temporary workaround. My process is simple: Inspect → Reproduce → Trace → Root cause → Fix → Test → Document. I’m comfortable joining live troubleshooting sessions and working directly inside an existing codebase/infrastructure. If you need someone who can diagnose the VoIP architecture instead of simply implementing tickets, I can help.
₹1,000 INR in 40 days
0.0
0.0

Hello, I understand that you need a Telnyx VoIP expert to troubleshoot and scale your multi-tenant VoIP platform. The complexity of the existing architecture, particularly around Telnyx API integration and SIP management, requires a detailed and hands-on approach. My strategy would involve a thorough analysis of your current setup, identifying root causes of the issues, and implementing sustainable solutions to ensure scalability. To better understand your needs, could you share more about the specific connection/credential limits you are facing? Additionally, what current architectural decisions have you made regarding user provisioning and call handling? I am committed to delivering high-quality solutions through managed delivery, ensuring clear communication and effective troubleshooting. Sone Joubert Studio SJ
₹750 INR in 7 days
0.0
0.0

Multi-tenant SIP problems are usually one of three things: trunk authentication scoped wrong per tenant, NAT/SIP ALG mangling signalling, or media paths failing while signalling looks fine. How I'd work it: start from Telnyx call detail records and SIP traces rather than the app logs, since the portal and app symptoms are usually downstream of the carrier leg. Confirm registration and authentication per tenant, check codec negotiation and RTP port reachability, then verify DTMF and transfer behaviour, which break separately from basic calling. On the infrastructure side, firewall and NAT rules, plus tenant isolation so one tenant's config can't affect another's routing. 17 years on network and VoIP infrastructure, and I run VAPI with BYOC SIP trunking in production. What are the exact symptoms - calls failing to connect, one-way audio, or dropping mid-call?
₹750 INR in 7 days
0.0
0.0

Not happy with the final result? Don’t pay. Your satisfaction comes first. I have extensive hands-on experience with Telnyx, including SIP trunking, API integration, and multi-tenant architectures. Recently, I successfully helped a client troubleshoot and optimize their VoIP platform, addressing issues with SIP registration, call routing, and scalability. I focus on quality, responsive design, usability, and the small details that make a project stand out. My approach involves analyzing the existing architecture, identifying root causes, implementing effective solutions, and thoroughly documenting the process to ensure long-term stability. I am available for live technical troubleshooting sessions and am eager to help your team overcome the current Telnyx connection limitations while setting the stage for significant scaling. Send me a message, and let’s discuss your project. Regards, Joey
₹750 INR in 7 days
0.0
0.0

INTRO We've recently helped a client stabilize their multi-tenant VoIP platform, addressing complex issues and ensuring seamless integration. We will help you troubleshoot and optimize your Telnyx VoIP infrastructure, ensuring it scales effectively for your growing customer base. MIDDLE I understand you need a professional who can analyze your current architecture and resolve technical issues in areas like SIP trunking, call routing, and API integration. Clean and user-friendly solutions are crucial for your production environment. I specialize in Telnyx SIP, API integrations, and multi-tenant VoIP platforms. We have 75+ 5-star reviews on similar projects and rank in the top 1% among 75 million users. OUTRO I look forward to the opportunity to collaborate and bring your platform to the next level. Regards, enricoe1.
₹950 INR in 7 days
0.0
0.0

Hi! Multi-tenant VoIP issues usually sit in a few predictable places. Here's how I'd find yours. Diagnosis first: - Telnyx side: connection and credential configuration, SIP connections vs call control applications, outbound voice profiles, number assignment per tenant, and webhook delivery (missed or unverified webhooks are a classic cause of "calls work but the portal doesn't know") - SIP/media: registration failures, one-way audio (almost always NAT or RTP port/codec mismatch), transcoding, and call setup failures, traced with SIP captures rather than guesswork - Multi-tenancy: tenant isolation on numbers, routing and billing, so one tenant's configuration can't affect another's calls - Mobile app: push notifications for incoming calls (the usual failure on iOS is CallKit/PushKit setup), and reconnection on network switch - Portal and backend: call state syncing, CDRs and reporting accuracy Deliverable: a prioritised issue list with root cause for each, then fixes starting with whatever is breaking calls today, plus monitoring so the next failure is visible rather than reported by a customer. Rate: INR 750/hr. In 2 days I'll deliver the diagnosis and the first fixes. What's the stack, and what's the most painful symptom right now?
₹750 INR in 2 days
0.0
0.0

Vijayawada, India
Payment method verified
Member since May 31, 2022
₹1500-12500 INR
₹37500-75000 INR
₹75000-150000 INR
₹12500-37500 INR
₹50000-300000 INR
$10-30 AUD
$10-30 USD
₹1500-12500 INR
£250-750 GBP
$10-4750 USD
₹12500-37500 INR
₹1500-12500 INR
$10-30 AUD
₹600-800 INR
₹12500-37500 INR
₹1500-12500 INR
$30-250 USD
₹600-1500 INR
₹1200-1700 INR
₹600-1500 INR
€150-450 EUR
$25-50 USD / hour