Rajib Kumer Das

•• Leading nationwide network & security systems maintenance for Bangladesh’s 2nd-largest telecom operator, supporting 60M+ subscribers and 2000+ devices. •• Managing E2E network operations across IP core, CS, PS, and RAN domains, including routers, switches, firewalls, and security platforms. •• Administer anti-DDoS systems to protect against large-scale attacks. •• Implement preventive measures to improve network stability and reduce outages. •• Conduct customer training and knowledge transfer.

•• Led implementation and maintenance of multi-vendor networks, including routers, firewalls, load balancers, and wireless systems. •• Delivered L3 support for thousands of devices across telecom, enterprise, and government networks. •• Migrated 1000+ services for the 2nd-largest telecom operator, improving reliability and performance. •• Deployed edge network for the largest telecom operator with only 30 seconds of downtime during service migration.

•• Served as POC for core network, security, and incident resolution across all 64 districts of Bangladesh. •• Implemented low-latency call center network serving 50 million customers nationwide. •• Deployed full campus network for Bangladesh Military Institute of Science and Technology (MIST). •• Recommended hardware upgrades for 100+ devices including routers, switches, firewalls, and wireless systems.

•• Monitored and supported IIG and ISP networks across all 64 districts of Bangladesh. •• Oversaw 50+ ISP uplinks and 1000+ end customers, resolving incidents and service issues. •• Configured and maintained core and aggregation networks for IIG and ISP infrastructure.

•• Deployed routers and switches based on MoP and LLD documentation. •• Installed, configured, and troubleshot LAN environments for multiple business clients. •• Contributed to the design and rollout of reliable intranet and internal network solutions.