Hire Dedicated VoIP Developers
Experienced engineers with 5+ years in FreeSWITCH, Asterisk, WebRTC, OpenSIPS, and more. Extend your team with battle-tested VoIP talent that ships production-ready code.
Deep VoIP & Telecom Skills
Our developers are not generalists. They live and breathe VoIP, building production systems that handle millions of calls daily.
FreeSWITCH Development
Custom dialplans, modules, ESL scripting, high-availability clustering, and performance tuning for enterprise-grade deployments.
Asterisk Development
AMI/ARI integrations, custom AGI scripts, dialplan programming, and Asterisk-based PBX and call center solutions.
WebRTC & SIP.js
Browser-based softphones, click-to-call widgets, video conferencing, screen sharing, and real-time communication applications.
OpenSIPS & Kamailio
SIP proxy configuration, load balancing, routing logic, high-concurrency call handling, and custom cluster setups for scalable VoIP infrastructure.
Billing Solutions
Wholesale and retail billing platforms built on FreeSWITCH and Asterisk. Rate management, CDR processing, invoicing, and payment gateway integration.
AI/ML Integration
Speech-to-text, sentiment analysis, call summarization, intelligent routing, and predictive analytics powered by modern AI/ML models.
Proven Platform Expertise
Our developers have hands-on experience with the most popular VoIP and contact center platforms in the industry.
VICIdial
Full customization, module development, performance optimization, and large-scale deployment of VICIdial-based contact centers.
FreePBX
Custom module development, IVR design, integration with CRM systems, and enterprise PBX deployments.
FusionPBX
Multi-tenant PBX setup, custom extensions, domain management, and FreeSWITCH-backed unified communications.
AnrizVoIP Platform
Our own multi-tenant omni-channel contact center system with predictive dialer, WebRTC agent desktop, and real-time analytics.
Technologies Our Developers Work With
From core telephony protocols to modern AI frameworks, our engineers are proficient across the entire VoIP technology landscape.
PBX & Switching
4 technologies
SIP & Proxy
4 technologies
Real-Time
4 technologies
Contact Center
4 technologies
AI & Analytics
4 technologies
Infrastructure
4 technologies
And many more tools, libraries, and frameworks tailored to your project needs.
How Hiring Works
From your first call to a developer writing code for your project, the entire process takes just 1-2 weeks.
Requirement Understanding
1-2 DaysShare your project requirements, tech stack, and goals. Our team conducts a detailed discovery call to understand exactly what expertise you need.
Resource Recommendation
1-2 DaysBased on your requirements, we handpick the best-suited developers from our team who match your technology needs and domain experience.
Profile Sharing
1 DayWe share detailed profiles of recommended developers, including their technical skills, project history, certifications, and relevant experience.
Technical Interview
FlexibleSchedule an online interview with the shortlisted developers. Verify their technical expertise, communication skills, and cultural fit for your team.
Finalization
1-2 DaysSelect your preferred developer(s). We finalize the engagement model, working hours, communication channels, and reporting structure.
Contract Signing
1-2 DaysWe prepare a transparent contract covering scope, timelines, IP ownership, confidentiality (NDA), and payment terms. No hidden clauses.
1 Month Advance Payment
ImmediateA one-month advance payment secures your dedicated resource. This covers the first month of development with clear deliverables and milestones.
Developer Onboarding
1 WeekYour dedicated developer is set up within one week. They join your tools, attend your standups, and start contributing to your project immediately.
Total Time: 1-2 Weeks
From initial discussion to your developer writing the first line of code for your project.
Choose Your Engagement Model
Whether you need one developer or an entire team, we have a model that fits your project requirements and budget.
Dedicated Developer
Full-Time Resource
A dedicated VoIP developer working exclusively on your project, 8 hours/day, 5 days/week. Fully integrated into your team.
- 160 hours/month guaranteed
- Works in your timezone
- Joins your daily standups
- Direct communication via Slack/Teams
- Weekly progress reports
- Follows your HR policies
Part-Time Developer
Flexible Hours
A skilled VoIP developer available part-time for your project. Ideal for ongoing maintenance, feature additions, or advisory roles.
- 80 hours/month
- Flexible scheduling
- Async communication
- Bi-weekly status updates
- Task-based tracking
- Scale up anytime
Team Augmentation
Multiple Resources
Build a complete VoIP development team. Combine developers, QA engineers, and project leads to accelerate your project delivery.
- Custom team composition
- Project manager included
- Agile/Scrum methodology
- Dedicated QA support
- Architecture consulting
- Volume pricing available
Why Hire From AnrizVoIP?
We are not a generic staffing agency. We are a VoIP product company, and the developers we offer are the same engineers who build enterprise telecom systems every day.
Minimum 5+ Years Experience
Every developer on our team has at least 5 years of hands-on VoIP development experience with real-world production deployments.
End-to-End Expertise
From SIP trunking to frontend dashboards, our developers handle the full stack. No need to hire multiple specialists.
Battle-Tested Engineers
Our developers build and maintain our own AnrizVoIP contact center platform, serving 12 countries with thousands of daily calls.
1 Week Onboarding
No months of recruitment delays. Your dedicated developer is set up, onboarded, and productive within just one week.
Timezone Flexibility
Our team operates across multiple timezones. Your developer works during your business hours for seamless collaboration.
Your Rules, Our Talent
Hired developers follow your company HR policies, attend your standups, use your tools, and report directly to your team leads.
How Your Developer Integrates
Your hired developer becomes a seamless extension of your team, following your processes and delivering results on your schedule.
Your Working Hours
The developer works during your business hours, ensuring real-time collaboration with your in-house team. No overnight delays.
Your Communication Tools
Slack, Microsoft Teams, Jira, GitHub, or any other tools your team uses. The developer adapts to your existing workflow.
Your Standups & Meetings
Joins your daily standups, sprint planning, and retrospectives. Stays aligned with your team goals and priorities.
Your HR Policies
Leave requests, time tracking, and conduct follow your company rules. We manage payroll, you manage the work.
Weekly Progress Reports
Receive weekly status reports with completed tasks, hours logged, blockers encountered, and plans for the upcoming week.
Direct Access
No account managers in between. Communicate directly with your developer for faster decisions and zero communication lag.
Frequently Asked Questions
Common questions about hiring dedicated VoIP developers from AnrizVoIP.
The minimum engagement period is 3 months. This allows enough time for the developer to fully understand your project, deliver meaningful results, and establish a productive working relationship. After the initial period, you can continue on a month-to-month basis.
Absolutely. We encourage you to conduct a thorough technical interview with the recommended developer(s). You can assess their coding skills through a live session, ask domain-specific questions, and evaluate their communication abilities before finalizing.
Our developers specialize in FreeSWITCH, Asterisk, WebRTC, SIP.js, OpenSIPS, Kamailio, VICIdial, FreePBX, and FusionPBX. They also have strong experience with wholesale and retail billing solutions, custom cluster setups for high-concurrency environments, and AI/ML model integration for voice applications.
Yes. Once a developer is assigned to your project, they operate according to your company HR policies. This includes working hours, leave policies, communication protocols, and reporting structures. They function as an extension of your in-house team.
From the initial requirement discussion to developer onboarding, the entire process typically takes 1-2 weeks. Once the contract is signed and payment is received, the developer is set up within one week, including access to your tools and project repositories.
Yes. You can start with one developer and scale to a full team as your project grows. We offer team augmentation packages where you can add developers, QA engineers, and project leads. Scaling up typically takes 1-2 weeks per additional resource.
Your satisfaction is our priority. If the assigned developer does not meet your expectations within the first two weeks, we will replace them with another qualified resource at no additional cost. We maintain a bench of experienced VoIP developers to ensure seamless transitions.
For single developer engagements, the developer reports directly to your team lead. For team augmentation (3+ resources), we include a dedicated project manager who handles sprint planning, progress tracking, and stakeholder communication at no extra charge.
All code and deliverables produced by our developers belong to you. We sign comprehensive NDAs and IP assignment agreements before the engagement begins. Your proprietary information is protected, and our developers adhere to strict confidentiality protocols.
We require a one-month advance payment to begin the engagement. Subsequent payments are due at the beginning of each month. We accept bank transfers, PayPal, and major credit cards. Detailed invoices with timesheet breakdowns are provided monthly.
Ready to Hire a VoIP Expert?
Tell us your requirements and get a skilled, dedicated VoIP developer working on your project within one week.