Senior Mobile Core Architect

OXIO is the world's first telecom-as-a-service (TaaS) platform. We are democratizing telecom and making it easily accessible for brands and enterprises to fully own and operate proprietary mobile networks designed to support their own customers needs. Our TaaS solution combines multiple existing networks into one single platform that can be seamlessly managed in the cloud as a modern SaaS offering. And it gets better - with full network access comes unparalleled business intelligence and insights to help enterprises better understand customer and machine (M2M) behavior. With a continuous focus on innovation, any company can build a powerful telecom presence with OXIO, and in addition help them glean unique customer insights like never before.

OXIO was recently selected by Forbes as one of the Best Start-Up Employers to work for in 2023. Are you ready to join us?

As part of the mobile core team, you will take care of our cloud mobile platform; you will have the following responsibilities:

• Configuration of STPs, DRAs, HLR/HSS, SMSC, SGSN, GGSN/PGW, SBC, etc. Along with the team, you will be responsible for being able to manage all equipment on our network.

• Using dashboards (and building new ones) to clearly and quickly discover issues and patterns

• Accountable and responsible to follow the communications procedures in place when handling an incident. Communication is both internal within our company and external to our third-party providers.

• Drive the implementation of telecom interconnection in relationship with our providers

• Maintenance, troubleshooting, security audits, and emergency response

• Wireshark tracing of critical infrastructure to debug issues

• Occasional on-call requirements

At least 10 years' experience in the core network domain with a mobile networks

• 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, including ability to design and configure voice and messaging flows

• 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.)

OXIO is committed to fostering a diverse, equitable, and inclusive workplace where all employees feel valued and empowered. We believe that diversity in all its forms drives innovation and creativity, and we strive to create an environment that reflects and celebrates the unique backgrounds, perspectives, and talents of our employees. We do not discriminate against any employee or applicant for employment based on race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, genetic information, veteran status, or any other characteristic protected by applicable federal, state, or local law. We are dedicated to providing a work environment free from discrimination and harassment. We committed to ensuring that all qualified applicants have an equal opportunity to apply for job openings. If you need assistance or an accommodation due to a disability, please contact us at for more information.