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Kaushik Parmar
@kaushik512
Level 2
Mobile and VoIP developer
India
English, Hindi, Gujarati
About me
🚀 VoIP Specialist | Expert Flutter, ReactNative, ReactJS, NodeJS, Android & iOS Developer
- With 12+ years of experience, I specialize in VoIP development, WebRTC, and SIP-based mobile & web dialers using WebRTC, Linphone, JSSIP, SIPJS, and PJSip.
- Proficient in ReactJS, NodeJS, NextJS, ExpressJS & Angular for web solutions.
- Successfully delivered 70+ mobile apps in Flutter, ReactNative, Android & iOS.
Whether it's design, development, or project management, I bring quality & innovation to every project. Let's build something amazing! 💡
Skills
Kaushik Parmar
$30/hour
Offline •
Average response time: 2 hours
See my services
Cross-Platform Development
I will develop voip or webrtc softphone using linphone, pjsip, jssip, or sipjs
VoIP and Telephony
I will install and configure asterisk , freeswitch , astpp webrtc voip servers
Want to work on an hourly basis?
Tell Kaushik Parmar what you need.
$30
/
hourPortfolio
Work experience
VoIP and WebRTC Development
Sheerbit Technologies • Full-time
Jan 2021 - Present • 5 yrs 4 mos
I have over 12+ years of experience delivering advanced VoIP and WebRTC solutions. As a freelancer, I have successfully developed and deployed custom SIP-based softphone applications for Android and iOS, WebRTC browser calling platforms, and complete call center systems tailored for startups and enterprises. Worked on WhatsApp and Telegram clone applications for enterprise to have their own chat and conference calling Application. My work includes Asterisk, FreeSWITCH, OpenSIPS, and Kamailio integrations, SIP trunk configuration, DID provisioning, IVR systems, call routing logic, and secure TLS/SRTP implementation. I have also built CRM-integrated dialers, multi-tenant PBX platforms, in-app calling systems similar to Uber, call recording modules, push notification systems, and scalable VoIP infrastructures hosted on cloud and Kubernetes environments. I have delivered more than 30+ softphone and telecom projects globally with strong focus on performance, security, and production stability, maintaining 100% client satisfaction.
46 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 46 Reviews
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jfbarsocchi
Repeat Client
France
Helpful?
jfbarsocchi
Repeat Client
France
Helpful?
dgtmarketer
Georgia
Order Canceled
I have had an awful experience with Kaushik. He is a liar and not a reliable developer!!! Terrible at communicating ! We divided the project into 2 phases. When he completed phase 1 (server setup+tests and verifications), he told me that everything was working, and I paid for phase 2. I could not test...
Helpful?
andrewheath394
South Africa
This one one of the best choices I made for my company by working with Kaushik! Thank you so much!
Helpful?
jfbarsocchi
Repeat Client
France
Very satisfied of the work. All workers at celloip are good persons, I will ask them for my future projects
Helpful?
