Solutions Engineer – SS7 Signalling, IP Routing

This is a fully remote position, open to applicants in United Kingdom.

📋 Description

• Design and set up Signaling, DRA/DEA routing, peers, connections, realms, Diameter identities, and associated GT and point-code mappings.

• Convert IR.21/RAEX inputs into precise, version-controlled operational configurations.

• Plan interconnect IP addressing and manage DNS/ENUM, APN, realm resolution, firewall/ACL, and IPX peering modifications.

• Oversee end-to-end IREG-side testing for network registration, attach sequences, S6a/S6d/SGd authentication, SGd SMS, and NIDD when applicable.

• Examine signaling traces with Wireshark and troubleshoot failures across Skylo, the IPX provider, and partner MNO.

• Work collaboratively with Skylo IPX partners and MNO IPX teams to pinpoint routing and configuration issues at the component level.

• Establish practices for change control, peer review, rollback, and documentation.

• Develop Low-Level Design documents for each interconnection.

• Collaborate with Network Engineering, NOC, Security, Product, and external MNO technical teams throughout the go-live and stabilization phases.

• Transform MNO IR.21/RAEX profiles into production-ready Diameter connectivity and validate live traffic.

• Manage the operational technical path from interconnect design through DRA/DEA configuration, IP/DNS/ENUM readiness, IREG execution, troubleshooting, and operational handoff.

⛳️ Requirements

• Over 10 years of hands-on experience in mobile-core signaling, roaming interconnect, telecom solutions engineering, or network operations.

• Extensive technical knowledge of Diameter, including DRA/DEA configuration, realm routing, peer management, and S6a/S6d/SGd protocols.

• Strong understanding of IP interconnect fundamentals, including DNS/ENUM, routing, security controls, and firewall/ACL coordination over IPX/GRX networks.

• Advanced protocol analysis capabilities with the ability to interpret Wireshark traces to independently identify signaling failures.

• Demonstrated experience in converting complex IR.21/RAEX data into operational configurations and conducting structured IREG validation.

• A disciplined approach to change management, documentation, configuration integrity, and mitigating live production risks.

• Preferred: Experience with NB-IoT NTN, NIDD, MME registration troubleshooting, SS7/MAP, STP, or IoT roaming.

• Preferred: Practical experience with Signaling & IP configuration in Core networks.

• Preferred: Automation proficiency using Python, APIs, infrastructure as code, or network testing frameworks.

🏝️ Benefits

• Competitive compensation packages, including a stock option-based equity program.

• Comprehensive benefits package covering medical, dental, vision, and retirement plans.

• Monthly allowances for wellness and education reimbursement.

• A generous time-off policy.

• Holidays.

• Opportunity to work temporarily abroad.

• Flexible work arrangements.

• Commitment to equal opportunity and an inclusive workplace.