Koahlabs

Software Engineer - Backend

San Francisco

Sponsorship not specifiedDetected 116 days ago

TypeScriptPythonRubyReactReact NativeFlutteriOSAndroidRailsPostgreSQLRedisAWSTerraformGrafanaKafkaA/B Testing

About the role

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.
We move quickly, operate with high trust, and care deeply about craft.

you'll ship code that shapes the company and the ecosystem we're building.
Build scalable data models that support multiple impressions for an ad request allowing us to align publisher and advertiser interests
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

Design abstractions that allow us to experiment and ship new formats that allow for a flexible way of tracking engagement events

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 Stack
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.
Working at Koah means joining at the ground floor: you'll ship code that shapes the company and the ecosystem we're building.
Infra: Terraform, AWS, LGTM (Loki, Grafana, Tempo, Mimir), Tailscale, Cloudflare
Data: PostgreSQL, ClickHouse, Redis, Kafka, Python
Core Application: Ruby on Rails, React, TypeScript
SDKs: Flutter, React Native, Android, iOS
Example projects
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 on

This listing is sourced directly from Koahlabs's careers page and normalized into a canonical job model.