Cloud & Telco Engineer – SIP, Reliability

NAIRON GmbH

. Run and harden the SIP edge, including Kamailio-based session border controllers, carrier and customer SIP trunks, PBX integrations, TLS, and SRTP .

Posted 10/31/2026full-timeRemote • GreeceMid-LevelSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in managing and hardening SIP edge infrastructure, including Kamailio-based session border controllers and VoIP technologies. Proficient in Kubernetes deployment on AWS and European clouds, with a strong focus on reliability and incident response in telecom environments.

Highest-signal resume keywords

SIP Proxy Routing LogicKubernetes In ProductionInfrastructure As Code Using TerraformLinux Networking And Packet-Level TroubleshootingProduction SIP Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

SIP TrunksNAT TraversalRTPCodecsDTMFKamailioAWS NetworkingLoad TestingCapacity PlanningIncident Response

Soft Skills

Calm During IncidentsOwnership Of Reliability Issues

Tools & Technologies

GitOpsArgo CDHelmTerraformSngrepWiresharkSIPpRTPengineFreeSWITCHAsterisk

Industry Keywords

TelecomVoIPReal-Time MediaMulti-Region SetupsCarrier InterconnectsNumber PortingWebRTC

Tech Stack

Tools & technologies

AWSCloudKubernetesLinuxPythonTerraformVoIPGo

About the role

Key responsibilities & impact

Run and harden the SIP edge, including Kamailio-based session border controllers, carrier and customer SIP trunks, PBX integrations, TLS, and SRTP
Implement redundancy and failover between zones and providers
Perform graceful draining and releases without dropping calls
Troubleshoot SIP and RTP call quality issues, including NAT traversal, codecs, DTMF, one-way audio, transfers, and re-INVITEs
Run Kubernetes on AWS and European clouds using GitOps, Argo CD, Helm, and Terraform
Handle observability and incident response through metrics, logs, traces, alerting, runbooks, and postmortems
Conduct load testing and capacity planning
Manage cost at the edge
Own reliability problems across the telco edge and cloud infrastructure supporting live calls

Requirements

What you’ll need

Several years running production infrastructure where downtime is visible to customers, ideally in telecom, VoIP, or real-time media
Production SIP experience: trunks, registrations, REFER, re-INVITE, NAT traversal, RTP, codecs, and DTMF
Experience with SIP proxy routing logic such as Kamailio or OpenSIPS; GUI-only PBX administration is insufficient
Linux networking and packet-level troubleshooting using sngrep, Wireshark, and SIPp
Kubernetes in production
Infrastructure as code using Terraform or similar
English proficiency, written and spoken, as the working language
Calm during incidents and able to identify and document root causes
Ownership of reliability issues through resolution
AWS networking, multi-region or multi-provider setups, RTPengine, FreeSWITCH, Asterisk, LiveKit, WebRTC, carrier interconnects, number porting, and Python or Go are nice to have

Benefits

Comp & perks

Flexible work setup: work fully remotely or from a co-working space
Company laptop and phone provided
Small, agile, collaborative team environment
Growth opportunities and ownership of the call path from carrier to AI agent
Permanent employment
40 hours/week