Rakuten Symphony is a Rakuten Group company, providing global B2B services for the mobile telco industry and enabling next-generation, cloud-based, international mobile services.
Building on the technology Rakuten used to launch Japan’s newest mobile network, we are taking our mobile offering global. Let’s build the future of mobile telecommunications together!
Job Purpose
We are seeking a highly experienced and self-driven Senior Network & Cloud Infrastructure Engineer to join our global IT infrastructure team. The ideal candidate will be responsible for designing, implementing, automating, and supporting advanced networking solutions across multi-vendor environments with a focus on mobile network technologies (4G/5G), automation, cloud integration, and security. This role involves collaboration with telecom clients, managing high-performance network infrastructures, and delivering end-to-end solutions.
Key Responsibilities
* Design, deploy, and support advanced network infrastructures including mobile backhaul/fronthaul for 4G/5G networks.
* Configure and troubleshoot routers, switches, and firewalls (Cisco Nexus, Cisco IOS XR and DZS C1216 series).
* Implement advanced routing protocols: BGP, OSPF, IS-IS, IPv6.
* Perform device hardening and vulnerability assessments for compliance and security.
* Build and maintain network automation scripts using Python, Ansible, REST APIs, and YAML/JSON templates.
* Well versed with implementing IEEE 1588v2 along with SyncE for synchronization in 4G/5G networks.
* Oversee Zero Touch Provisioning and fault/performance management integration with OSS tools.
* Troubleshoot complex network issues using tools such as Wireshark, Spirent, IXIA and Calnex.
* Lead change management processes including software release coordination and documentation (MOP, RCA).
* Manage customer-facing engagements and PoCs for new product introduction.
* Work and manage operational TT’s for the relevant network elements.
Required Qualification & Skills
* Bachelor’s degree in electrical/Electronics/Computer Engineering or related field.
* Certifications: CCNA (required), IEEE 1588v2 and Dasan's STU expertise.
* 10+ years of experience in network administration, design, and support.
* Experience with firewalls: Cisco ASA, Palo Alto, Checkpoint.
* Hands-on experience with VPN technologies (Site-to-Site, SSL, AnyConnect, DMVPN).
* Strong background in enterprise and service provider-grade environments.
Soft Skills
* Excellent communication and documentation skills.
* Strong analytical, troubleshooting, and problem-solving abilities.
* Ability to work independently and in cross-functional teams.
* International mindset with experience working in multicultural environments.
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