About the role

What will you do at Bandwidth?

Who We Are:

Bandwidth, a prior “Best of EC” award winner, is a global software company that

helps enterprises deliver exceptional experiences through voice, messaging, and

emergency services. Reaching 65+ countries and over 90 percent of the global

economy, we're the only provider offering an owned communications cloud that

delivers advanced automation, AI integrations, global reach, and premium human

support. Bandwidth is trusted for mission-critical communications by the Global

2000, hyperscalers, and SaaS builders!

At Bandwidth, your music matters when you are part of the BAND. We celebrate

differences and encourage BANDmates to be their authentic selves. #jointheband

What We Are Looking For:

We are seeking a Senior VoIP Engineer with a modern engineering mindset to join

Bandwidth's Network Operations team. While you possess deep expertise in SIP and

carrier-grade environments, you view infrastructure through the lens of Software

Reliability Engineering (SRE). This role is critical for ensuring reliable,

secure, and automated SIP connectivity across multiple carrier platforms and

enterprise environments.

What You'll Do

* Platform Automation: Design and implement automation to reduce operational
burden, replacing manual workflows with scripting and Infrastructure as Code
(IaC).
* Voice Orchestration: Use tools like Ansible/AWX, Github, and Terraform to
automate the provisioning and scaling of voice services and carrier
interconnects.
* Carrier Interconnect Strategy: Design, deploy, and maintain SIP solutions
with global carriers to ensure reliability, compliance, and optimal routing.
* Advanced Observability: Act as the highest-level escalation point for complex
SIP/RTP problems. Use advanced tools like Empirix, Wireshark, SIPp, and HEPIC
to analyze call flows and media streams.
* System Integration: Collaborate with R&D teams to integrate SIP services from
SBC edge to custom voice core.
* Documentation & Mentorship: Maintain "Documentation as Code," including SIP
call flow diagrams and interconnect standards, while providing guidance to
junior staff on design and deployment methodologies.
What You Need:
* Experience: 5+ years of hands-on VoIP engineering experience, with a heavy
emphasis on carrier-grade SIP environments.
* SIP Mastery: Expert-level knowledge of SIP signaling (INVITE, BYE, etc.), SDP
negotiation, and RTP/RTCP.
* Automation Toolkit: 3+ years of proficiency in Python, Bash, Ansible, or
Github for automating provisioning and troubleshooting workflows.
* Infrastructure as Code: Experience using IaC tools to manage infrastructure
at scale.
* SIP Proxies: Hands-on experience with open-source SIP proxies (e.g.,
Kamailio, OpenSIPS) alongside traditional SBCs (e.g., Ribbon).
* Linux/OS: Linux proficiency for VoIP application performance and system
troubleshooting.
* Diagnostics: Proficiency with diagnostic tools such as Empirix, Wireshark,
SIPP, sngrep, and Homer/HEP.

Bonus Points

* Carrier Expertise: Direct experience with carrier-to-carrier SIP
interconnects and carrier-grade voice network design.
* Routing & Databases: Experience with Least Cost Routing and complex routing
logic.
* Voice Security: Familiarity with TLS, SRTP, and regulatory compliance
including STIR/SHAKEN and E911.
* Virtualized Infrastructure: Experience deploying voice services in
containerized or cloud-native environments.
* Networking: Solid knowledge of IP, DNS, and routing protocols.
The Whole Person Promise:
At Bandwidth, we’re pretty proud of our corporate culture, which is rooted in
our “Whole Person Promise.” We promise all employees that they can have
meaningful work AND a full life, and we provide a work environment geared toward
enriching your body, mind, and spirit. How do we do that? Well…
* 100% company-paid Medical, Vision, & Dental coverage for you and your family
with low deductibles and low out-of-pocket expenses.
* All new hires receive four weeks of PTO.
* PTO Embargo. When you take time off (of any kind!) you’re embargoed from
working. Bandmates and managers are not allowed to interrupt your PTO – not
even with email.
* Additional PTO can be earned throughout the year through volunteer hours and
Bandwidth challenges.
* “Mahalo moments” program grants additional time off for life’s most important
moments like graduations, buying a first home, getting married, wedding
anniversaries (every five years), and the birth of a grandchild.
* 90-Minute Workout Lunches and unlimited meetings with our very own
nutritionist.
Are you excited about the position and its responsibilities, but not sure if
you’re 100% qualified? Do you feel you can work to help us crush the mission? If
you answered ‘yes’ to both of these questions, we encourage you to apply! You
won’t want to miss the opportunity to be a part of the BAND.
Applicant Privacy Notice [https://www.bandwidth.com/applicant-privacy-notice]

Which skills does this role require?

VoIP EngineeringSIP SignalingCarrier InterconnectsSIP TrunkingInteroperability TestingAdvanced TroubleshootingRTPSession Border Controllers (SBCs)SIP ProxiesWiresharkPacket AnalysisLinux AdministrationScriptingSDP NegotiationCall Flow AnalysisAutomationVoIPNetwork OperationsInteroperabilitySBCsRibbonAudioCodesOracle/Acme PacketOpenSIPSKamailioSIPpHEPICEmpirixSDPLinuxPythonBashAnsibleENUMTerraform

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