Call for submissions: Platform Engineering Meet-ups
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Call for submissions: Platform Engineering Meet-ups

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Nagesh

@nageshs

Sustainability @Scale

Submitted Oct 17, 2025

Session type: Talk (30 mins)

InMobi Ad Exchange operates at a vast scale with infrastructure stats like 500K vCPUs, 2M GB RAM, 5 PB data storage, 1.5M GB daily network egress, and 2.5M GB daily load balancer processing. These resources result in a cloud bill resembling a mobile number.

I will discuss how we created a foundational shift in the organisation by raising awareness of the second largest expense after employee salaries. How & why we built in-house solution instead of buying externally.
Finally, how we built safeguards to prevent fleet meltdown from spot evictions, balancing reliability and sustainability.

This session does not limit to basic strategies like cutting costs by eliminating waste such as shutting down idle resources, procuring CUDs, or applying retention policies on buckets, but on viewing the infrastructure bill through a business lens to understand unit economics, derive ROI, and optimise when it lacks sense.

Key Takeaways

  1. Modern approach to traditional FinOps
  2. How custom solutions balance reliability and sustainability at million QPS scale

Who Should Attend

  1. Architects responsible for scalable, fault-tolerant systems with sustainability constraints.
  2. DevOps and infrastructure engineers who manages large-scale model deployments and costs

About Me
Nagesh Sahu
Sr Staff @ InMobi
Ad Exchange

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