Serhii Ponomarenko

I’m a Senior Full-Stack Engineer who owns product features end-to-end, from React UI through Go backend and Kubernetes deployment/config handling. I focus on complex security and data problems, including building custom authentication layers and handling heavy backend streaming data.

At Kubeshark, I implemented traffic network inspection/analysis features in the Dashboard UI, including a snapshot system (export PCAP with filters), an L4-to-L7 traffic hierarchy, and continuous dashboard filtering support for new traffic dissectors (GraphQL, DNS, TLS, L4-stream, plus 15+ more). I also delivered major performance work for network-capture scale by redesigning the live traffic store, cutting browser heap by ~4× (856MB→184MB) and enabling 700k+ entries where the prior limit was ~250k.

I pair back-end efforts with deep UI-level optimization and commercial UX—shipping plan management dialogs, pricing/trial flows, and Community-to-Enterprise plans backed by the Stripe API. I’ve also led deployment feature flags via Helm/Kubernetes, and previously worked across collaborative document editing and API development for profile/dashboard/feed/payment domains.