Job Opportunities API

Job Description: About Organization Rakuten Symphony is at the forefront of revolutionizing the telecommunications industry, building the future of mobile networks with innovative, cloud-native, and Open RAN solutions. Our mission is to empower operators globally to deliver cutting-edge services efficiently and at scale. Job Duties • Kernel-Level Optimization:   Conduct deep-dive performance tuning (sysctl, tuna, /proc) to optimize RHEL for real-time (RT) workloads. • RAN Workload Tuning:   Configure and tune vCU/vDU components, implementing CPU isolation (isolcpus), IRQ affinity, and NUMA alignment to achieve deterministic performance. • Network Acceleration:   Optimize packet processing using DPDK and SR-IOV to bypass kernel bottlenecks for high-throughput RAN traffic. • Advanced Troubleshooting:   Lead Root Cause Analysis (RCA) for high-severity incidents using advanced tracing tools (ftrace, trace-cmd, perf). • Automation & Hardening:   Develop complex Ansible playbooks to automate kernel hardening and performance profile deployments across large-scale clusters. • Lifecycle Management:   Manage vulnerability patching, OS upgrades, and hardware-software interaction (Intel RDT, CAT, BIOS-level tuning). • Virtualization:   Expert management of KVM/QEMU, Red Hat OpenShift Virtualization, and containerized vDU pods within Kubernetes. Technical Skills & Tools • Core:   Kubernetes, Linux (RHEL 8/9, Rocky Linux), Docker, Helm, Git • Hardware:   Supermicro, Dell iDRAC, HP • Automation:   Ansible, Python, Shell • Monitoring/Diagnostics:   top, htop, vmstat, iostat, pqos, ftrace, perf • Certifications:   RHEL, CKA (Certified Kubernetes Administrator) Minimum Qualifications • Experience:   8–12 years of relevant experience in telecommunications infrastructure engineering or SRE, with a proven track record in large-scale, complex environments. • Kubernetes & Virtualization:   Deep knowledge of bare-metal Kubernetes deployments and virtualization in development/production environments. • Networking:   Expertise in host-level networking, DNS/DHCP architecture, TLS management, load balancing, and advanced container networking. • SRE Practices:   Proven application of SRE principles, including major incident leadership, capacity/scalability strategy, and advanced change management. • Security:   Strong architectural knowledge of security hardening, RBAC models, pod security mechanisms, and secret management. • Technical Depth:   In-depth knowledge of process scheduling (SCHED_DEADLINE, SCHED_FIFO), memory management, and I/O schedulers. Languages: English (Overall - 3 - Advanced)