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IMS Product Manager & Operations-Rakuten Mobile,Inc.

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System Engineer
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Rakuten Mobile Network,Inc.
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00011650 Requisition #

Rakuten Mobile Network has been established in January, 2018 in order to launch the new mobile carrier and MNO business. It is about to start its service in 2019, it is recruiting competitive candidates.

 

Responsibilities:

  • Design of efficient solutions to providing IMS services over 5G/NR with fallback to 4G (along with possible downgrading of service) when not in 5G coverage.
Required Qualifications 
  • Expert-level knowledge of IMS architectures including routing theory and reference interfaces.
  • Detailed technical and product line knowledge of the Nokia suite of IMS elements, including CSCF, HSS, One-NDS, CSD DRA, and HSM
  • Experience with and understanding of Nokia virtualized deployment architecture DUs/VNFs and the individual virtual machines contained therein.
  • Advanced knowledge of the SIP protocol including commonly used headers and message flows.
  • Functional understanding IPv4, IPv6, transport protocols such as TCP, UDP, and SCTP, and upper-layer protocols such as LDAP and Diameter.
  • Demonstrated working knowledge of Linux-based operating systems.
  • Understanding of VMware design principles and deployment requirements.
  • Solid understanding of IMS components and data network elements.
  • Experience with orchestration tools such as, Cisco Network Services Orchestrator (NSO), Ansible, Chef, Puppet, Python, and HP NFV Director.
  • Meticulous attention to detail, with a results-oriented focus.
  • Excellent communications, interpersonal, organizational, and problem-solving skills.
  • Cisco, Openstack, and Redhat certifications.
  • Strong knowledge of multimedia real time communication protocols and performance requirements
  • Experience with designing end-to-end solutions/system for services and features including signaling protocols (e.g., SIP), interfaces and associated complete system behaviors.
  • Experience with handling inter-RAT mobility between 5G, LTE, and WiFi while maintaining ongoing IMS sessions with minimal impact to user experience
  • Design of efficient solutions to providing IMS services over 5G/NR with fallback to 4G (along with possible downgrading of service) when not in 5G coverage.
Preferred Qualifications 
  • Demonstrated ability to manage interdisciplinary projects involving both technical and non-technical teams.
  • Experience participating on project teams as both a leader and participant for long duration, complex technical projects.

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