Software Engineer - Backend
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Who We Are:
- Koah Labs is building the ad network to power the next generation of AI-native products. Our mission is to help publishers monetize and help advertisers reach the right audience — without compromising speed, UX, or privacy.
- We’re a small, tight-knit team in San Francisco with backgrounds at X, Apple, Meta and early-stage startups. We’ve raised from top investors and are growing fast with real traction on both the publisher and advertiser sides of the marketplace.
- Working at Koah means joining at the ground floor: you’ll ship code that shapes the company and the ecosystem we’re building. We move quickly, operate with high trust, and care deeply about craft.
- Our StackInfra: Terraform, AWS, LGTM (Loki, Grafana, Tempo, Mimir), Tailscale, Cloudflare
- Data: PostgreSQL, ClickHouse, Redis, Kafka, PythonCore Application: Ruby on Rails, React, TypeScriptSDKs: Flutter, React Native, Android, iOSExample projects
- Build scalable data models that support multiple impressions for an ad request allowing us to align publisher and advertiser interests
- Design abstractions that allow us to experiment and ship new formats that allow for a flexible way of tracking engagement events
- Build a low-latency frequency capping system to improve an end user's experience and prevent ad fatigue
- Create schemas to represent high-volume ad bidding with ad exchanges to increase the diversity of the ad demand on platform
- You might be a fit if You like debugging and optimizing performance
- You are detail oriented and like to create good abstractions that others rely onYou enjoy experimentation, measuring, and creating reliable systems
Compensation Range: $180K - $250K