Expert VoIP Engineer Needed: Multi-Tenant PBX Deployment (FusionPBX / FreeSWITCH Preferred)

@AwaisChaudhry

Hello, I understand you need a true multi-tenant, white-label VoIP platform built on FusionPBX/FreeSWITCH (or viable alternatives) with strict data isolation and scalable provisioning. I will design and deploy a ground-up multi-tenant architecture with separate domains per client, isolated CDRs, voicemails, and databases, plus a zero-touch provisioning server (HTTP/HTTPS/TFTP) that automatically provisions Yealink, Poly, and Fanvil devices. A restricted client self-service portal will let customers manage extensions, reset voicemails, and listen to their call recordings, while restricting access to trunk settings, routing logic, or other tenants. Security hardening includes Fail2Ban, SIP TLS, SRTP, and firewall rules to prevent toll fraud, along with solid NAT traversal. The solution will be scalable, maintainable, and auditable, with clear documentation and a phased deployment plan. What is your target tenant count and peak concurrent call load, and are there any regulatory or data residency requirements we must meet? Best regards,

@farooqtahir2013

As an experienced Network, VoIP, and System Engineer with a rich history in the IT industry, your VoIP project is right up my alley. My core competencies lie in FreeSWITCH, FusionPBX, Asterisk (including VitalPBX Carrier/ Thirdlane), which coincide impeccably with the project requirements. I've had the privilege of serving both small-scale setups and enterprise-level networks with excellent results. I completely adhere to "Zero-Touch" provisioning, utilizing either the native module or custom provisioning server depending on particular client needs. I understand the gravity of data isolation and security between distinct clients and can guarantee that your client's security won't be compromised. Looking forward to contributing efficiently towards your vision.

@captek

Hi, Thanks for posting project requirements. I read that and it fits our skill and expertise.   As you can see in our profile, we are VoIP/Telephony and WebRTC experts and have vast experience  of over 16+yrs in Call, Chat, PBX, Call Centre & audio/video conferencing applications.   Glance of System Configured and Developed: - Unified Communication (Audio, video, chat, email, text) - Omnichannel Platform integrations - PBX Phone System Software - Inbound/Outbound Call Centre Software - Auto Dialer/Predictive Dialers - Call/SMS broadcasting - CRM Integrations (eg Zoho, salesforce, Pipedrive, Zapier, Hubspot and many more) - UCaaS, CCaaS, CPaaS Platform development - AI Virtual Agent/AI ChatBot - Contact Center AI - OpenAI/ChatGPT integration - Transcription/Summary/Sentiment Analysis - Conversational AI   Technology Expertise: VoIP: Freeswitch, Asterisk, Twillio, Kamilio, SIPJs, OpenSIP AI Tools - VertexAI, OpenAI, NLP, Deepgram, Whisper, Conversational AI, Yapi, n8n, Elevenlabs, Livekit, retellai

@Feriver

Hello, I understand you’re looking for a senior VoIP engineer to design and deploy a true multi-tenant PBX platform built from the ground up, not a patched single-instance system. I have hands-on experience delivering white-label VoIP solutions for MSPs using FusionPBX on FreeSWITCH, with strict tenant isolation at the domain, database, and permission layers. My approach focuses on scalability, clean architecture, and long-term operational stability, ensuring each client environment remains fully segregated with independent CDRs, voicemails, recordings, and user scopes. I have implemented zero-touch provisioning environments using secure HTTP/HTTPS servers integrated with Yealink, Poly, and Fanvil endpoints, including MAC-based configuration and RPS workflows. Phones auto-provision on first boot, minimizing manual work and reducing onboarding time for new tenants. Client-facing portals are carefully permissioned, allowing self-service tasks such as extension updates, voicemail resets, and call recording access, while fully restricting trunks, dial plans, and cross-tenant visibility. Security is treated as a core requirement, not an afterthought. I harden deployments with SIP TLS, SRTP, Fail2Ban, rate limiting, firewall rules, and toll-fraud protection, alongside proper NAT traversal and RTP handling. This results in a carrier-grade, MSP-ready multi-tenant VoIP platform that is secure, compliant, and easy to manage at scale. Thanks Asif

@juanjosec63

Hello, I’m a senior VoIP engineer with deep experience deploying true multi-tenant PBX platforms for MSPs, and I understand exactly why you’re avoiding single-instance FreePBX with context hacks. This would be designed multi-tenant from day one, with strict isolation and security. Best regards, Juan

@munirhayat

I have more than 12 years of experience in VOIP solutions and more than 11 years of experience in Linux and Networking. Freeswitch Installation and Configuration Freeswitch/Fusionpbx multitenant system deployment for Telecom operators Freeswitch/Fusion Sip profiles Freeswitch/Fusion dialplan Freeswitch/FusionCarrier configuration Freeswitch/Fusionpbx Fax server send/receive fax Freeswitch/Fusion users and groups Freeswitch/Fusion trunks Asterisk/Freepbx SIP/IAX/PRI trunks Asterisk /Freepbx twilio elastic trunk Asterisk /Freepbx call termination and origination Asterisk/Freepbx/Elastix/ dynamic ivr using text to speech engine and save DTMF feedback of users in Database.. Asterisk/Freepbx Dialplans Asterisk/Freepbx IVR , Automatic Call distribution Asterisk/Freepbx Queues Asterisk/Freepbx dynamic logins Asterisk/Freepbx Call Recordings Asterisk/Freepbx Migration to different cloud technologies like AWS, vultr, digital ocean etc. Customization of asterisk based Voicemail service Asterisk/Freepbx based cost effective voicemail development using IBM Watson Speech Recognition API Elastix server troublshooting and support 3CX cloud server installation, configuration, troublshooting and support Experience of sip service providers environment... Fanvil FDMS Greanstream GDMS Programming: Python, PHP, XML, JSON, and Shell Scripting

@nikhilgarg96

Hello, I am really excited about the opportunity to collaborate with you on this project! It aligns perfectly with my skill set and experience, and I’m confident I can contribute meaningfully to your vision. I genuinely enjoy working on projects like this, and I believe we can create something both functional and visually engaging. Please feel free to check out my profile to learn more about my past work and client feedback. I’d love to connect and discuss the project details further your goals, expectations, and any specific features or ideas you have in mind. The more I understand your vision, the better I can bring it to life. I am ready to get started right away and will put my full energy and focus into delivering quality results on time. My goal is not just to complete the project, but to exceed your expectations and build a long-term working relationship. Looking forward to hearing from you soon! With regards! Nikhil

@Herculesz

Hi I design and deploy true multi-tenant VoIP platforms using FusionPBX/FreeSWITCH, PostgreSQL, SIP/TLS/SRTP, and hardened Linux networking. Your main technical risk is tenant leakage—where one client can see, dial, or access another client’s data due to weak domain isolation. I solve this by building domain-per-tenant architecture in FusionPBX with strict ACLs, separated CDRs/voicemail, and dialplan scoping at the core engine level. Zero-touch provisioning is implemented with FusionPBX provisioning plus HTTPS templates for Yealink, Poly, and Fanvil, including MAC-based auto-config and RPS support. Client self-service is handled through role-restricted FusionPBX portals so users can rename extensions, reset voicemail, and access only their own recordings. Security includes SIP over TLS, SRTP, Fail2Ban, geo/IP firewall rules, rate limiting, and fraud-prevention dialplan logic. The result is a white-label, MSP-grade VoIP platform that is secure, scalable, and operationally simple. Thanks, Hercules

@fmateo05

Hello. My name is Felipe Mateo. I would install your pbx environment as requested; Note that I Would use Kazoo/2600hz for this implementation. My install procedure would be with multiple zones in a cluster. I can perform the install environment using kazoo related. Contact me for more details, * Which specific software stack do you propose using for this project (FusionPBX, Kazoo, VitalPBX, etc.)? Kazoo/2600hz * How do you handle "Zero Touch" provisioning? Do you use the native module or a custom provisioning server? I have a custom provisioning implementation. (30 brands 360 models) * How does your proposed solution ensure Client A cannot dial Client B's internal extensions or access their call recordings? The kazoo/monster-ui has a setting to manage like closed-groups or custom device restrictions * Have you deployed a multi-tenant system for an MSP before? Please provide a brief example. I have been working and deploying about 150 install to other freelancers portal using kazoo cluster install plan.

@abhisaini0188

Hello, Thank you for sharing this opportunity, it sounds like a great fit, and I’d be glad to be involved. I’ve worked on similar projects and am confident I can contribute meaningful value to your team. I focus on delivering high-quality, reliable solutions while ensuring the process is smooth and efficient for my clients. My goal is always to build solutions that are both technically solid and easy to maintain. You’re welcome to review my profile to see examples of my previous work. If it aligns with what you’re looking for, I’d be happy to discuss your project in more detail and outline how I can support your goals. I’m available to start immediately and can dedicate my full attention from day one. Let’s connect and explore how we can make this project a success together. Looking forward to your response. With Regards! Abhishek Saini

@trm66614

Hi there,Good morning I am Talha. I have read you project details i saw you need help with Asterisk PBX, VoIP, Linux, HTTP, MariaDB, Cisco, PostgreSQL and SIP I am writing to propose an innovative approach to tackle your project. Our proposal centers on delivering creative and effective solutions that will set your project apart. We will present fresh, out-of-the-box ideas that align with your project's objectives, demonstrating how we can achieve remarkable results. Please note that the initial bid is an estimate, and the final quote will be provided after a thorough discussion of the project requirements or upon reviewing any detailed documentation you can share. Could you please share any available detailed documentation? I'm also open to further discussions to explore specific aspects of the project. Thanks Regards. Talha Ramzan

@atesicfl

⭐⭐⭐ SENIOR VOIP ENGINEER – TRUE MULTI-TENANT PBX ⭐⭐⭐ Hello! I’m a senior VoIP engineer with hands-on experience deploying true multi-tenant PBX platforms for MSPs, with strict tenant isolation and security. I strongly agree with avoiding single-instance FreePBX hacks. Proposed stack: FusionPBX on FreeSWITCH (preferred), using domain-based multi-tenancy with isolated CDRs, voicemails, recordings, and database scoping per tenant. Zero-Touch Provisioning: FusionPBX native provisioning with HTTPS + MAC-based configs, plus RPS for Yealink/Poly. Fully automated on first boot. Tenant isolation: Per-domain dialplans, ACLs, and permission-scoped users ensure Client A cannot dial or access Client B data—no shared contexts. I’ve deployed multi-tenant VoIP platforms for MSPs including provisioning, client portals, SIP TLS/SRTP, Fail2Ban, and anti–toll fraud hardening. Ready to start immediately and deliver a secure, scalable white-label platform.

@novatech2210

Hi Vikram, I've successfully designed and implemented multiple multi-tenant PBX systems using FusionPBX and FreeSWITCH. We're the perfect fit for your project. I possess in-depth knowledge of FreeSWITCH, FusionPBX, and Asterisk, as well as advanced Asterisk configurations like VitalPBX Carrier and Thirdlane. Multiple 5-star reviews on complex PBX deployments and VoIP projects attest to my expertise in designing secure and scalable VoIP systems. I can efficiently set up core PBX engines, configure distinct domains for each client with strict data isolation, and implement Zero-Touch Provisioning using HTTP/HTTPS/TFTP with major endpoint brands like Yealink and Poly. I'd be happy to discuss your specific setup and answer the screening questions. Worst case, you get a free consultation and some solid ideas. Let's schedule a call to explore how I can help you build a robust, white-label VoIP platform. Chris | Lead Developer | Novatech

@SmartCodeDev

Hi! I am building my experience with multi-tenant VoIP systems and am very interested in working with FusionPBX and FreeSWITCH for this project. I understand the importance of true tenant isolation and would deploy each client in its own FusionPBX domain so their extensions, recordings, and call data remain completely separate. For zero-touch provisioning, I would use FusionPBX’s built-in provisioning system so supported phones can automatically pull their configuration using MAC address provisioning. Clients would be given limited portal access only to manage their own extensions, voicemail passwords, and call recordings, with no visibility into trunks or other tenants. Security would be addressed using TLS/SRTP, firewall rules, and Fail2Ban to reduce the risk of toll fraud and unauthorized access. I am eager to learn, follow best practices, and work closely with your team to deliver a stable and secure multi-tenant PBX platform.

@romans754

`Dear Hiring Manager,` As a VoIP engineer with a deep understanding of FreeSWITCH and FusionPBX, I believe I am the ideal candidate for your multi-tenant white label VoIP platform project. My experience and expertise span over 7 years, including deployment, configuration, and data security, all crucial aspects you're keen on. I completely resonate with your architectural preference for FusionPBX (FreeSWITCH) due to its effective multi-tenant capacity. Over the years, I've set up various similar systems that prioritize data isolation and security between different clients. One notable example is when I deployed a robust MSP-oriented multi-tenant system that parallelled your needs leveraging FusionPBX as the core engine. Moreover, my networking skills dealing with SIP, RTP, and TCP/IP will prove invaluable towards achieving a seamless phone system for each distinct client. Beyond deployment, I can execute other project essentials like zero-touch provisioning utilizing endpoint managers/RPS and creating an intuitive client self-service portal. Along with my adeptness with databases such as PostgreSQL/MariaDB for CDRs plus robust security hardening techniques like Fail2Ban/SIP TLS setup, I ensure utmost reliability and protection in your VoIP infrastructure. Thanks!

@YammTech110

Hello there, I understand that you are seeking an expert VoIP engineer to deploy a True Multi-Tenant PBX System using FusionPBX or FreeSWITCH, ensuring strict data isolation and security between clients. Proposed Solution: I will set up the core PBX engine on your provided cloud infrastructure, configure distinct domains for each client with total isolation, implement zero-touch provisioning for major endpoint brands, and develop a client self-service portal with restricted GUI. Key Deliverables: - Multi-Tenant Architecture setup - Zero-Touch Provisioning configuration - Client Self-Service Portal development - Security Hardening implementation Portfolio & Skills: I will share my portfolio with you in the DM and bring expertise in FreeSWITCH, FusionPBX, SIP, RTP, NAT traversal, endpoint managers, and database management using PostgreSQL. Call to Action: I'd love to connect for a quick chat to discuss your project in more detail. Best regards, Bilal

@dexwolftech999

Hi there, We can assist you in deploying a robust and secure multi-tenant PBX system using FusionPBX or another preferred platform for your IT Managed Service Provider needs. Our team of senior VoIP engineers specializes in setting up True Multi-Tenant PBX Systems with strict data isolation and security measures in place. Questions: 1. Which specific software stack do you propose using for this project (FusionPBX, Kazoo, VitalPBX, etc.)? 2. How do you handle "Zero Touch" provisioning? Do you use the native module or a custom provisioning server? DexWolf Technologies has extensive experience in FreeSWITCH, FusionPBX, networking protocols, endpoint provisioning, and database management, particularly PostgreSQL. We have successfully deployed multi-tenant systems for MSPs in the past, ensuring complete client isolation and secure communication channels. About Us: https://www.freelancer.com/u/dexwolftech999 We’d be delighted to share our portfolio over chat. Click the chat icon to connect with us for a detailed discussion on your VoIP platform requirements. Thanks, DEX

@panroman50

Hello Vikrampal, I am Roman, a seasoned VoIP engineer with over 10 years of experience specializing in multi-tenant PBX deployments. I have a strong background in FreeSWITCH, FusionPBX, and advanced Asterisk, making me well-equipped to handle the complexities of your project. I have carefully reviewed your project requirements for building a robust, scalable, and secure VoIP platform for multiple clients. I understand the importance of strict data isolation and security between clients, which is why I am committed to deploying a True Multi-Tenant PBX System tailored to your specific needs. I would love to connect with you in chat to discuss your project further and explore how I can provide a professional solution that meets all your requirements. Best regards, Roman

@anilptk

Hello! I am thrilled to submit my proposal for your project seeking an Expert VoIP Engineer for a Multi-Tenant PBX Deployment, with a preference for FusionPBX/FreeSWITCH. As an experienced VoIP engineer, I understand the importance of building a robust and secure platform for hosting phone systems for various clients. I am confident in my ability to deploy, configure, and secure a True Multi-Tenant PBX System that meets your architectural requirements, ensuring strict data isolation and security between clients. I look forward to the opportunity to collaborate with you on this project and deliver exceptional results. Regards, anilptk