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FreeSWITCH
OpenSIPS
Asterisk
WebRTC
SIP & RTP
Building a VoIP platform or scaling telecom infrastructure requires specialized skills. Inextrix helps businesses hire a dedicated telecom development team with flexible VoIP staff augmentation and access to experienced offshore VoIP developers.
specialized telecom engineers
years in VoIP development
open-source platforms mastered
engineer-led support coverage
Build high-capacity softswitch solutions for carrier-grade routing, switching, and voice traffic management at scale.
Feature-rich business communication systems with advanced calling and collaboration capabilities.
Scalable platforms supporting multiple customers, businesses, and service providers on a single infrastructure.
Browser-based voice and video solutions with modern WebRTC development services and mobile integration.
Reliable SIP-based communication infrastructure for seamless carrier connectivity and routing.
Intelligent customer engagement platforms with automation, AI analytics, and voice capabilities.
Scalable solutions for bulk voice notifications, alerts, and customer outreach campaigns.
Automated dialing systems that improve agent productivity and outbound call efficiency.
Flexible billing systems for usage tracking, rating, invoicing, and telecom revenue management — plus integrated voice, messaging, video, and collaboration platforms for modern enterprises and CPaaS providers.
Build carrier-grade voice platforms with expert FreeSWITCH development services. Deep dialplan, module, and clustering experience from real production deployments.
Scale SIP infrastructure with reliable OpenSIPS development services for carrier-grade deployments. SIP proxy, SBC, and high-throughput routing expertise.
Build feature-rich communication systems with professional Asterisk development services. IVR, PBX, call center integration, and AGI script expertise.
Launch browser and mobile communications with advanced WebRTC development services. Real-time media, TURN/STUN, and mobile VoIP expertise.
Design and scale end-to-end communication platforms with experienced VoIP developers. End-to-end platform expertise from architecture through cloud deployment.
Our developers work exclusively on VoIP and telecom solutions every day — not split across web, mobile, and occasional telecom projects.
Build robust platforms with deep expertise in SIP signaling, RTP, failover design, and high-concurrency environments — from real production deployments.
Proven experience with FreeSWITCH, OpenSIPS, Asterisk, and WebRTC across global deployments — internals depth, not just surface familiarity.
We design architectures built for performance, growth, and long-term reliability — with HA, clustering, and horizontal scale built in from day one.
We rescue, optimize, and stabilize underperforming VoIP platforms for production workloads — fixing what generalists built and making it safe to scale.
| Area of Expertise | ✓ Telecom Specialists (Inextrix) | ✕ Generic Developers |
|---|---|---|
| SIP & RTP Protocol Knowledge | Deep expertise from real production deployments | Limited protocol understanding |
| Platform Experience | Carrier-grade, high-concurrency telecom systems | Standard web and app development background |
| NAT & Media Handling | Experienced with traversal and media flow optimization | Minimal VoIP networking experience |
| High Availability Architecture | HA design, clustering, and failover by default | Generic scaling approaches only |
| Telecom Security | SIP fraud detection, DoS awareness, protocol hardening | Limited SIP security knowledge |
| Open-Source Platform Depth | Deep internals of FreeSWITCH, OpenSIPS, Asterisk | Surface-level VoIP familiarity only |
Ready to hire the right team? Pre-vetted telecom developer profiles delivered within 48 hours.
Whether you need to hire dedicated developers, scale with VoIP staff augmentation, or build a dedicated telecom development team, Inextrix offers flexible engagement models to match your project goals.
Work with full-time telecom developers focused exclusively on your project for long-term development and platform growth. Your developer, your timezone, your process.
Extend your in-house team with experienced offshore VoIP developers through flexible staff augmentation — without the cost of permanent hiring.
Leverage our telecom outsourcing services for complete project delivery with defined scope, timelines, and milestones. Full accountability for the outcome.
NDA from Day 1
Full IP Ownership
Timezone Flexibility
Agile Reporting
Direct Communication
Our team delivers FreeSWITCH development, OpenSIPS development, VoIP development services, and WebRTC development using proven production technologies.
Telecom Operators & Carriers
Contact Center Platforms
CPaaS & UCaaS Providers
Healthcare Communication Platforms
BFSI Communication Systems
Enterprise VoIP Infrastructure
Clear communication, experienced FreeSWITCH developers, and support that continues after launch.
Tell us about your project, technology stack, team size, and hiring needs. A 30-minute call is usually all we need.
Receive pre-vetted telecom developer profiles tailored to your requirements within 48 hours.
Evaluate technical skills through interviews, code reviews, or architecture discussions. You decide who to hire.
Sign the NDA, finalize onboarding, and start working with your dedicated telecom developer from day one.
Our clients trust us for our deep VoIP expertise, technical excellence, and commitment to delivering reliable communication solutions. Read their experiences and discover how we have helped businesses achieve their goals.
Amazing group of guys to work with. After the quality of work I saw in the first project completed, we have decided to move all our development over to Inextrix. All work was completed on time and as expected. Would not think twice to recommend these guys.
Platformity
We were looking for a reliable IP PBX solution as our conventional system had a lot of limitations. I'm happy with the solution and service provided by Inextrix. They gave us scalable IP PBX software and also integrated our CRM system and automated billing solution. This system increased productivity and ROI significantly.
Vice President, 8COM Inc
Hi, I just wanted to send you guys a quick message on how great its been working with you guys on our voip development needs, in the last 3-4 years, you have been very responsive and always care about delivering the work as much as we do. Im very impressed with the high level of talent that you guys have and am grateful that I could find such dependable voip professionals that always do what they say they will. take care -Albert
CleverMoto
Build and scale your communication platform with experienced telecom engineers specializing in VoIP, SIP, WebRTC, and carrier-grade infrastructure.
Get quick answers to common questions about Inextrix products, solutions, VoIP engineering services, and technologies.
You can hire dedicated VoIP developers including FreeSWITCH developers, OpenSIPS developers, Asterisk developers, WebRTC developers, and full-stack VoIP engineers. Our experts have production experience in carrier-grade telecom environments.
We use modern AI to accelerate development, testing, and analysis, while also building AI-enabled telecom features such as AI dialers and voice automation. Our senior developers remain in control of the final outcome.
Yes. We provide flexible timezone coverage for global clients, allowing your dedicated developers to align with your working hours across US, UK, South Africa, Australia, and other regions.
Yes. You can build a dedicated telecom development team with developers, architects, and QA specialists based on your project requirements. Team composition is flexible and scales up or down as your project evolves.
We offer flexible models including dedicated developers, VoIP staff augmentation, and project-based development. These options support different telecom project needs, timelines, and budget structures.
Yes. Our telecom developers have experience integrating SIP environments, carrier connections, legacy systems, and custom telecom workflows. We map your existing setup before proposing any integration approach.
Dedicated developer engagements start from one month, while project-based timelines depend on scope and deliverables. Staff augmentation can accommodate both short and long-term arrangements.
With decades of experience and know-how in software development essentials, we build future-proof, intuitive, and highly scalable web, mobile, and VoIP solutions. Bring ultimate success to your business with Next-Gen, Tech-Empowered Solutions.
425 W Colonial Dr, Suite 303 Orlando, FL 32804 United States
128 City Road London EC1V 2NX United Kingdom
Baobab Office Park, 86 John Vorster Rd, Randpark Ridge 2169 South Africa
508–509, Lilamani Corporate Heights Ahmedabad, Gujarat 380013 India
Established in 2010, we're a team of tech enthusiasts driving businesses to success with cutting-edge technology.
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