Rank order for your profile:

Instahyre - curated, India product companies, recruiters reach out. Best fit.
Wellfound - startups, remote, Node-heavy. Free.
workatastartup.com (YC) - Node-native seed/Series A. Free. Barely used by Indian devs. Underpriced.
Hirist - tech-only India, less noise than Naukri.
Cutshort - startups, decent.
Weekday.works - referral-graph based.
Company careers page direct - highest signal per application. Wobot, CoverForce, do this.
r/developersIndia monthly hiring thread - free, low volume, real.
GDG Kolkata network - your actual edge. Using at ~20%.