Senior Packet 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?Key responsibilities: To act as a Subject Matter Expert (SME) in all 3G/4G/5G mobile Packet Switched (PS) network elements like PGW, GGSN, MME, ePDG, SGSN and other Packet Core elements. Making recommendations for improvements in all aspects of the core functions and elements. Configuration and software version management of the assigned mobile core network elements. Supporting management of the relevant mobile core network element vendors. Supporting Roaming & Carrier Relations to implement new roaming and wholesale implementation, including IREG testing. Providing support to Pre-Sales (Solution Architects) through peer-review of proposed solutions to customer. Working with Solution Architects and the Head of Telecom to work into High Level Design (HLD) documentation. Convert HLD into LLD and specific core element changes to implement customer specific solution. Support the Network Operations Centre (NOC) with live wholesale customer support, including both proactive and reactive identification / troubleshooting and resolution of issues of packet core issues. Developing skills and expertise across the infrastructure components and new technologies. Key Qualifications Bachelors or Master’s degree in Computer Science or Engineering. Minimum of 5-8 years working in the telecommunications industry designing, integrating and managing Packet Switched network propositions for e.g. a NEP or carrier / MNO / MVNO. Minimum of three years of systems integration, management and/or technical support of mobile core network components. Demonstrable experience of managing & configuring Packet Switched network elements including GGSN, P-GW, SGSN, S-GW, PCRF & MME. Circuit Switched (CS) network elements, interfaces and messaging for both 3G/WCDMA and 4G/LTE networks, including IMS CSFB and PCRF. Voice SIP / RTP, ISUP and voice convergence technologies, including IMS (including VoLTE and VoWiFi). IP networking, including IPv4 and IPv6, VPN IPSec and Point-to-Point (e.g. to CCNA standard). In-depth knowledge of data core network architecture (including MNO and MVNO / MVNE infrastructure architecture) as well as network topology, including ability to describe the key elements of a mobile network and understand how the components function and interact as well as how mobile data sessions work. Experience of capacity management and dimensioning of all Packet Core network nodes Be able to derive call flows and interactions of each core element as required by each customer solution. In-depth understanding of 3GPP, ITU-T and ANSI standards. Understanding of roaming agreements and IR.21, including IREG testing. RADIUS and Diameter for both signaling and charging scenarios. Trouble shooting and fault detection. Proactive and preventative maintenance. IP and SS7 network security. Familiarity with BSS platforms and provisioning systems. Successful track record of designing compelling technical solutions based on commercial needs of the customers.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. #J-18808-Ljbffr