Hire Kamailio Developers & SIP Edge Proxy Experts
Kamailio is the engine behind the world's largest SIP networks — and CelloIP engineers know it deeply. We build SIP edge proxies, WebRTC-to-SIP gateways, STIR/SHAKEN compliance, SBCs with topology hiding, and carrier-grade registrars. 12+ years, 25+ SIP proxy deployments.
From $25/hr — far below what scarce Kamailio talent costs in the US/UK ($120–$200/hr). Full-time CelloIP staff, NDA Day 1, full IP ownership.
$25/hr
Starting rate
48hr
Onboarding speed
25+
SIP proxy deployments
NDA
Signed Day 1
Kamailio Engineer Profiles
Match the seniority to your SIP infrastructure needs.
Kamailio SIP Engineer
$25–$35/hr- SIP registrar & user location
- Authentication (auth_db, digest)
- Request/reply routing logic
- NAT traversal & RTPEngine
Senior Edge Proxy Architect
$35–$45/hr- TOPOS topology hiding
- STIR/SHAKEN implementation
- Anti-fraud & rate limiting (HTABLE)
- TLS/SRTP edge security
- Multi-node HA clustering
WebRTC Gateway Engineer
$35–$55/hr- WebSocket transport (websocket.so)
- WebRTC-to-SIP bridging
- Browser client registration
- ICE/STUN/TURN coordination
- Media gateway orchestration
Full Kamailio Expertise Stack
Nine domains across edge, security, and gateway.
SIP Edge Proxy
Registration, authentication, request routing, record-route, loose routing, sequential requests
WebSocket / WebRTC
websocket.so transport, SIP-over-WebSocket (RFC 7118), browser WebRTC client gateway
TOPOS Topology Hiding
Hide internal network topology, rewrite Via/Contact headers, protect media server cluster
STIR/SHAKEN
PASSporT token generation/validation, Identity header injection, FCC caller ID compliance
HTABLE & State
In-memory hash tables, rate limiting, call counters, temporary state without DB hits
Dispatcher Routing
Load balancing to FreeSWITCH/Asterisk clusters, health checks, failover, weight-based routing
Security & Anti-Fraud
Pike module flood protection, fail2ban integration, fraud detection, TLS/SRTP enforcement
Database Backends
MySQL, PostgreSQL, Redis for user location, auth, dialog, and distributed state
Monitoring
siptrace/HEP to Homer, sipcapture, Prometheus metrics, real-time call trace analysis
Frequently Asked Questions
How much does it cost to hire a Kamailio developer?
From $25/hr for mid-level, $35–$55/hr for senior SIP architects — 60–70% less than US/UK rates. Kamailio expertise is scarce, making this exceptional value. NDA Day 1, 48-hour onboarding, full IP ownership.
What can a Kamailio developer build for me?
SIP edge proxies, WebRTC-to-SIP gateways, large-scale SIP registrars, SBCs with TOPOS topology hiding, STIR/SHAKEN caller ID authentication, anti-fraud/rate-limiting layers, and high-availability SIP infrastructure.
Is Kamailio the best choice for a WebRTC gateway?
Yes — Kamailio's websocket.so module is the community's most battle-tested choice for WebRTC-to-SIP gateways. Browser clients connect via SIP-over-WebSocket and Kamailio bridges them to SIP/PSTN. We've deployed many production Kamailio WebRTC gateways.
Can you implement STIR/SHAKEN with Kamailio?
Yes. Kamailio's stir_shaken module handles PASSporT token generation/validation, Identity header injection, and attestation — meeting US FCC caller ID authentication requirements for robocall mitigation compliance.
Should I use Kamailio or OpenSIPS?
Both are excellent (both forked from OpenSER). Kamailio excels at SIP edge proxy, WebRTC gateways, and high-throughput registration. OpenSIPS excels at carrier routing and REST-driven CPaaS. Many production setups use both — Kamailio edge + OpenSIPS routing. We advise based on your specific use case.
Ready to Hire a Kamailio Expert?
Tell us your SIP edge requirements. We'll match you with the right engineer in 24 hours. Free technical call, NDA before discussion.