Mobile Core Network Engineer

TL;DR

Mobile Core Network Engineer: Managing and scaling hirify.global’s global mobile core network infrastructure with an accent on 3GPP EPC architecture, signaling plane operations, and high-availability design. Focus on automating infrastructure deployments, optimizing network performance, and ensuring robust observability across global datacenter environments.

Location: Must be based in Dublin, Ireland

Company

hirify.global is an industry-leading company building a private, global, multi-cloud IP network that provides hyperlocal edge technology and innovative connectivity solutions through intuitive APIs.

What you will do

• Deliver and maintain core network services including PGWs, DRAs, GTP proxies, HSS, and STPs across global datacenters.
• Design redundancy patterns and service localization to ensure high availability and disaster recovery.
• Manage the GTP proxy fleet and DRA infrastructure, including IMSI translation and realm routing.
• Develop and maintain infrastructure automation using Ansible and CI/CD pipelines.
• Operate the signaling plane across roaming partner interconnects and manage complex network connectivity.
• Build monitoring dashboards and participate in on-call rotations to ensure infrastructure reliability.

Requirements

• Strong understanding of 3GPP EPC architecture: PGW, SGW, HSS, DRA, PCRF, STP, and associated interfaces.
• Hands-on experience troubleshooting mobile core network elements in a production environment.
• Deep networking fundamentals including IP routing, BGP/OSPF, VLANs, GRE/IPsec, SCTP, and packet-level debugging.
• Proficiency in Linux system administration, network configuration, and scripting.
• Experience with infrastructure automation tools like Ansible or Terraform.
• Familiarity with containerized environments (Docker, Kubernetes) and cloud infrastructure.

Nice to have

• Experience with Diameter Routing Agents or GTP proxy platforms.
• Knowledge of multi-IMSI SIM architectures, VoLTE/IMS, or roaming models.
• Familiarity with IPX/GRX peering and GSMA roaming standards.
• Programming experience with Elixir, Go, or Python in infrastructure contexts.

Culture & Benefits

• Contribution to an industry-shaping, financially stable, and profitable organization.
• Commitment to continuous learning and professional development.
• Exposure to cutting-edge connectivity technology and global network architecture.