Tech Lead (IC) – Architecting the Next Billion-User Systems

About Us
We’re Primetrace Technologies
- the team behind: Crafto – 100M+ downloads
- https://crafto.app/ Kutumb – 100M+ downloads
- https://kutumbapp.com/ We build products used by tens of millions. And we don’t have the luxury of things “just working.” They have to scale, survive, and stay fast — always. About Role:
• This isn’t a “manage the team” role. This is a build, break, scale, and own every damn line of backend logic role.
• Our systems run on Node.js and AWS, and your job is to make them bulletproof under traffic.
• If you’re the kind of engineer who gets angry when a request takes 500 ms... keep reading. What You’ll D
• Architect Node.js systems that scale from zero to millions
- resilient, battle-tested, and ready for anything.
• Tear apart bottlenecks before they become outages.
• Build a backend that auto-heals, scales without begging, and doesn’t melt at 1M RPM.
• Own the full lifecycle
- from feature idea to scaling in production.
• Guide engineers, set the technical bar, and call out flawed designs.
• Think ahead: design for chaos, failovers, and ugly realities before they happen. You’re Built for This If




• You’ve watched a system catch fire and brought it back with grit and caffeine.
• You’ve scaled services under brutal load and lived to tell the story.
• You know Node.js beyond frameworks
- profiling, event loop internals, async churn.
• You can rip apart AWS quirks (RDS slow queries, ElastiCache meltdowns, S3 limits) in your sleep.
• You don’t wait for instructions
- you see a mess and fix it. Bonus XP (Things That Impress Us)
• You’ve taken systems to 100M+ users or 6-digit RPS.
• You’ve crushed AWS bills without slowing down a single request.
• You’ve built real-time madness: Kafka, Kinesis, WebSockets.
• You’ve designed secure-by-default infra: IAM, VPC, KMS. What’s In It For You
• Total ownership. Your code decides if we scale or die.
• Zero politics, zero handholding. Just outcomes.
• Massive visibility. If you’re positive, everyone will know it.
• Work with a team that’s already shipped to 100M+ people
- and is doing it again.
• If you’ve fought fires in production, debugged chaos at 3 AM, and still wanted more
- you’re our kind of engineer.

📌 Tech Lead (Bengaluru)
🏢 Primetrace
📍 Bengaluru