Abhishek Sagar
Staff Software Engineer at Calix
Bengaluru, Karnataka, India
Summary
👤
Senior🎓
Top SchoolAbhishek Sagar is a Staff Software Engineer based in Bengaluru with ~9 years of hands-on experience building and evolving high-performance network protocol software across Calix, Cisco, Juniper and Brocade. He specializes in advanced L2/L3 multicast and unicast routing (PIM, IGMP/MLD, ISIS, Segment Routing, SRTE), MPLS tunneling, and resilient fast-reroute mechanisms (LFA, rLFA, TILFA, PPLFA), and has driven feature work from SR prefix/adjacency SIDs to distributed CSPF and PCE integration. At Cisco he contributed to next-generation firewall features and IPv6 platform integrations for cloud/remote VPN scenarios, demonstrating a cross-domain fluency in routing and security. He is comfortable implementing low-level protocol mechanics and systems-level HA (NSR) while also delivering pragmatic product features like V6 DHCP proxy and policy-based adaptive routing. A dual IIT Bombay MTech graduate, he pairs deep routing protocol expertise with practical engineering that ships in carrier-grade products. An interesting detail: his career spans both chipset-scale multicast implementations and cloud-hosted firewall verifications, giving him rare end-to-end visibility from data plane to orchestration.
9 years of coding experience
11 years of employment as a software developer
Intermediate, Science, Intermediate, Science at Dayawati modi academyBachelor of Technology (BTech), Computer Science, Bachelor of Technology (BTech), Computer Science at Harcourt Butler Technological Institute, KanpurIndian Institute of Technology BombayMetric (10th), Mathematics and Computer Science, Metric (10th), Mathematics and Computer Science at St thomas english medium school
English
Stackoverflow
1,219reputation
187kreached
23answers
82questions
Github Skills (23)
tcp10
traffic10
mutex6
pthreads6
posix6
locking6
linux6
network-programming6
gns36
visual-studio-code6
hadoop6
apache6
async6
asynchronous5
simulator4
Programming languages (3)
Github contributions (5)
sachinites/Algo
Mar 2017 - Mar 2022
Contributions:3 pushes, 1 branch in 5 years 1 month
sachinites/SPFComputation
Aug 2017 - Feb 2022
Contributions:312 commits, 283 pushes, 20 branches in 4 years 6 months
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