Mobile Core Network Engineer

telnyx54· Wireless Mobile
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📍 Dublin, Ireland

About this role

About Telnyx

Telnyx is an industry leader that's not just imagining the future of global connectivity—we're building it. From architecting and amplifying the reach of a private, global, multi-cloud IP network, to bringing hyperlocal edge technology right to your fingertips through intuitive APIs, we're shaping a new era of seamless interconnection between people, devices, and applications.

We're driven by a desire to transform and modernize what's antiquated, automate the manual, and solve real-world problems through innovative connectivity solutions. As a testament to our success, we're proud to stand as a financially stable and profitable company. Our robust profitability allows us not only to invest in pioneering technologies but also to foster an environment of continuous learning and growth for our team.

Our collective vision is a world where borderless connectivity fuels limitless innovation. By joining us, you can be part of laying the foundations for this interconnected future. We're currently seeking passionate individuals who are excited about the opportunity to contribute to an industry-shaping company while growing their own skills and careers.

The Role

We’re looking for a Mobile Core Network Engineer to join the team responsible for Telnyx’s global mobile core network. You’ll own the infrastructure that powers our wireless platform — keeping it reliable, scalable, and ready for what comes next. This is a hands-on role spanning network operations, deployment automation, and incident response.

What You’ll Do

Network Operations & Infrastructure

  • Deliver and maintain core network services across global datacenters — ensuring high availability of PGWs, DRAs, GTP proxies, HSS, and STPs

  • Design redundancy patterns (failover, active-active, disaster recovery) and drive service localisation in new regions

  • Manage the GTP proxy fleet and DRA infrastructure: routing rules, IMSI translation, realm routing, and peer management

  • Monitor traffic growth, forecast demand, and scale infrastructure ahead of need

Automation & Deployment

  • Build and maintain Ansible playbooks and CI/CD pipelines for consistent, repeatable infrastructure changes

  • Operate and evolve the signalling plane — Diameter, GTP-C/U, SS7 MAP — across roaming partner interconnects

  • Design and maintain network connectivity: GRX/IPX peering, inter-datacenter tunnels, SCTP multihoming, and firewall rules

Observability & On-Call

  • Build dashboards and alerting to catch issues before they become incidents

  • Participate in on-call rotation for wireless infrastructure incidents

What We’re Looking For

  • Solid understanding of 3GPP EPC architecture: PGW, SGW, HSS, DRA, PCRF, STP, and their interfaces (S6a, S8, S5, Gx, S1-MME)

  • Experience operating and troubleshooting mobile core network elements in production

  • Strong networking fundamentals: IP routing, BGP/OSPF, VLANs, GRE/IPsec, SCTP, and packet-level troubleshooting (tcpdump/tshark)

  • Strong Linux skills: systemd, network configuration, performance tuning, and scripting

  • Hands-on experience with infrastructure automation — Ansible, Terraform, or equivalent

  • Familiarity with containerised environments (Docker, Kubernetes) and CI/CD pipelines

  • Experience with monitoring stacks: Prometheus, Grafana, Alertmanager

  • Experience with AWS or similar cloud infrastructure

Nice to Have

  • Experience with Diameter Routing Agents (freeDiameter or commercial DRAs) or GTP proxy platforms

  • Knowledge of multi-IMSI SIM architectures, VoLTE/IMS, or roaming models (S8HR, LBO)

  • Familiarity with IPX/GRX peering, GSMA roaming standards (IR.34), or network automation tooling (Netbox, NAPALM)

  • Experience with Elixir, Go, or Python in a network infrastructure context

 

 

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Frequently Asked Questions

Is the salary disclosed for the Mobile Core Network Engineer position at telnyx54?
The salary for this Mobile Core Network Engineer role at telnyx54 is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Mobile Core Network Engineer position at telnyx54 located?
This Mobile Core Network Engineer role at telnyx54 is based in Dublin, Ireland. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Which team or department does the Mobile Core Network Engineer at telnyx54 belong to?
This Mobile Core Network Engineer position is part of the Wireless Mobile department at telnyx54. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Mobile Core Network Engineer position at telnyx54?
Click the "Apply Now" button on this page. You will be redirected to telnyx54's official application portal hosted on greenhouse where you can submit your application directly.
When was the Mobile Core Network Engineer job at telnyx54 posted?
This Mobile Core Network Engineer position at telnyx54 was posted on Jan 14, 2021. Apply as soon as possible — early applications are often reviewed first.
Mobile Core Network Engineer
telnyx54
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