📍
Location:
India - Remote🕒
Type:
Full-time💼
Department:
Infrastructure Team - Technology💻
Work Setup:
Remote
About ZIWO
ZIWO
is a leading
Omnichannel Cloud Contact Center Software (CCAAS)
supporting customer communications across
Phone, WhatsApp, SMS
, and more. Our platform integrates seamlessly with most CRMs and third-party apps via
open APIs
and serves businesses in
145+ countries
, including across the GCC.As a fast-growing B2B SaaS provider, ZIWO is redefining cloud contact center technology by delivering carrier-grade voice infrastructure, high-availability systems, and globally reliable network performance.
About The Role
We are seeking an experienced
VOIP & Network Engineer
to join our Infrastructure team. This senior-level role focuses on designing, deploying, and optimizing
carrier-grade VoIP systems
and ensuring the reliability, stability, and performance of ZIWO’s global voice and network stack.You will work across VoIP technologies, cloud networking, and modern containerized environments, contributing to a platform that powers mission-critical communications worldwide.
What You’ll Be Doing
- Design, build, and deploy carrier-grade VoIP infrastructure.
- Deploy and manage VoIP, SIP, PBX, and unified communications platforms (FreeSwitch / Asterisk / Kamailio).
- Integrate voice systems with network infrastructure and external applications.
- Optimize call routing, QoS, and voice-specific security protocols.
- Deploy and manage VoIP/Network solutions in Docker / Kubernetes environments.
- Implement systems to monitor voice quality using tools like Homer, and ensure SLA-driven voice performance.
- Configure LAN/WAN environments: routers, switches, firewalls, VLANs, VPNs, SD-WAN, load balancers.
- Monitor network performance and troubleshoot issues related to latency, jitter, packet loss, and downtime.
- Implement SIP trunking, SBCs, number routing, and modern IP-based call flow architectures.
- Plan and execute migrations from legacy telephony (analog/PRI) to IP-based platforms.
- Use tools such as Wireshark, SolarWinds, and platform-level diagnostics to debug complex voice issues (call drops, one-way audio, registration failures).
- Design and maintain failover systems, redundant SIP trunks, and resilient routing plans.
- Maintain services post-launch by monitoring availability, latency, and system health.
- Automate workflows to remove manual or error-prone processes.
- Apply cloud tooling (AWS, OCI, and others) to improve time-to-market.
- Participate in on-call rotations for alerts and incidents outside normal hours.
What You Bring
Core Qualifications
- 5–10 years of experience in VoIP & Network Engineering.
- B.S. in Computer Science or equivalent.
- Proven experience building and maintaining VoIP stacks and unified communication systems.
- Strong programming/scripting experience (Python or Go)
- Excellent English communication skills.
Technical Competencies
Carrier-grade VoIP Deployment Experience With
- FreeSwitch, Asterisk, Kamailio
- SIP protocols, RTP handling, SBC configuration
Network Engineering Proficiency
- LAN/WAN, routers, switches, firewalls
- VLANs, VPNs, SD-WAN
- Load balancing and redundancy
Experience With
- Docker / Kubernetes for VoIP workloads
- Voice monitoring systems (Homer)
- Network performance monitoring & troubleshooting
Strong Knowledge Of
- Linux (Ubuntu)
- Ansible, Terraform
- PostgreSQL
- AWS / OCI
- Git & Git Flows
- Monitoring tools: InfluxDB, Prometheus, Elasticsearch
Bonus Skills
- Experience with OPNsense (routing, firewalling, HA setups).
- Deep understanding of networking protocols: TCP/IP, UDP, BGP, OSPF, MPLS.
- Cloud-native networking: VPC/VCN, security groups, NACLs, Transit Gateway, Direct Connect, ExpressRoute.
- Mastery of troubleshooting tools: tcpdump, iptraf, mtr.
- Experience with IaC for networking using Terraform or Ansible.
- Strong background in SIP, RTP, SBCs, and telco-grade reliability.
- Experience operating high-availability telephony or VoIP systems at global scale.
Why Join ZIWO?
- Competitive salary & comprehensive benefits
- Dynamic, collaborative, multicultural environment
- Work on mission-critical global communication infrastructure
- Growth opportunities in cloud, infrastructure, telephony, and networking
- Contribute to a platform used in 145+ countries
- Be part of an innovative SaaS company shaping the future of cloud contact centers
ZIWO is an
equal-opportunity employer
. We value and seek diversity at every level of the organization and believe it drives creativity, innovation, and excellence.
