Senior DevOps / Voice Infrastructure Engineer

About us

Mad Devs is a full-stack team specializing in developing and administering large-scale IT products across various industries. Many of our products are used in Europe, the USA, and Southeast Asia. We are passionate about tackling complex challenges and delivering innovative solutions that make a significant global impact.
#LINKD

Responsibilities:

Design, deploy, and maintain SIP/VoIP infrastructure (Asterisk, FreeSWITCH, Kamailio) for AI Agents
Integrate voice platforms with cloud services (GCP, AWS) and internal AI pipelines
Ensure high availability and low latency of voice services (HA, load balancing, failover)
Manage cloud infrastructure via IaC (Terraform) and container orchestration in Kubernetes
Set up call quality monitoring (MOS, jitter, packet loss) and alerting with Grafana / Victoria Metrics
Build and optimize CI/CD pipelines (GitHub Actions, ArgoCD) for voice services
Harden voice infrastructure security: encryption (SRTP, TLS), toll fraud prevention, DoS protection
Integrate with PSTN/SIP trunk providers, manage DID numbers and call routing

It will be a plus:

WebRTC protocol
AI/TTS/STT integrations (Google TTS, Deepgram, Whisper)
AWS or GCP Professional certification
Compliance experience: HIPAA, GDPR, SOC 2
Ansible or other configuration management tools
Service mesh experience (Linkerd or Istio)
Python or Bash scripting for automation

Requirements:

3+ years of hands-on experience with Asterisk or FreeSWITCH
Deep knowledge of SIP, RTP, SRTP protocols
Experience with SIP proxies — Kamailio or OpenSIPS
WebRTC integrations
Trunk configuration, dialplan design, codec negotiation
GCP and/or AWS hands-on experience (2+ years)
Kubernetes (GKE or EKS) in production environments
Terraform — custom modules, multi-environment setups
Docker, Docker Compose
CI/CD: GitHub Actions, ArgoCD / Flux
Prometheus / Victoria Metrics, Grafana dashboards and alerting
Loki or ELK for log aggregation, voice quality metrics (QoS, MOS)
Kafka or RabbitMQ, Redis, PostgreSQL, ClickHouse
English and Russian at B2 level, for communication with stakeholders and team
Location: any, except Russia and Belarus

Why Join us

At Mad Devs, you will be part of a company that values creativity, strategic thinking, and continuous improvement. You will work on meaningful projects that impact millions of users worldwide alongside a talented and supportive team. By joining our team, you will have the opportunity to make a real impact, grow your career, and contribute to developing cutting-edge solutions in the world of backend engineering.