Senior Mobile Core Architect

OXIO is a telecom-as-a-service platform that enables brands and enterprises to own and operate proprietary mobile networks. We are seeking a Senior Mobile Core Architect to join our team in France. The ideal candidate will have at least 10 years of experience in core network domains, including SS7, Sigtran, Diameter, and packet-switched communications protocols. The role requires strong technical skills, adaptability, and good communication skills.

Requirements

• At least 10 years' experience in the core network domain with a mobile network
• Holding a BSc degree in Telecommunication or Computer Science (post-graduate studies are a bonus)
• 10+ years core telecommunications network experience
• 10+ years of experience with SS7, Sigtran, Diameter, Packet Switched (GGSN/PGw, GTP, GRX, IPX, etc.)
• Circuit switched communications protocols such as SS7 (including SCCP, TCAP, MAP and CAMEL phases 1 to 4), SCTP (SIGTRAN), Diameter
• Voice SIP / RTP, ISUP and voice convergence technologies, including IMS (including VoLTE and VoWiFi)
• Knowledge (general) in Voice Mail, IVR and PBX systems / softphones (secondary)
• Hands on with sniffers, Wireshark and testing tools in advanced mode
• Hands on with Linux/Unix based systems (you can find your way around a linux shell)
• Understanding of 3GPP, ITU-T and ANSI standards
• Understanding of roaming agreements and IR.21, including IREG testing
• Online Charging System (OCS) and CAMEL in billing and call control
• Strong writing and documentation skills are needed to develop reports
• Adaptability and responding to change
• Be able to work under pressure
• You are fluent in English (written and spoken)
• Ready to work on morning/afternoon shifts
• Good interaction with external customers and internal teams
• 2+ years scripting experience (Python, Bash, etc.)

Benefits

• Generous Paid Time Off
• 401k Matching
• Retirement Plan
• Visa Sponsorship