Koah
Software Engineer - Backend
$180K–$250K
San Francisco · On-site · Full-time · Posted Mar 27, 2026
About the job
Build and evolve backend systems for Koah’s advertising marketplace, including real-time auctions, ad decisioning, data models, and low-latency frequency capping.
What you'll do
- Develop scalable data models and schemas for ad requests, engagement tracking, and high-volume bidding.
- Build and improve real-time auction and ad-decisioning systems, including performance and reliability.
- Work with product and data science to turn ambiguous problems into measurable outcomes.
Nice to have
- Enjoy debugging and optimizing performance, creating useful abstractions, and experimenting with reliable systems.
- Want ownership of foundational systems and enjoy cross-functional collaboration.
Pay
$180K – $250K USD base salary
Tools
Terraform, AWS, PostgreSQL, ClickHouse, Redis, Kafka, Python, Ruby on Rails
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