Software Engineer

Koah Labs Engineering RoleKoah 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:Infra: Terraform, AWS, LGTM (Loki, Grafana, Tempo, Mimir), Tailscale, CloudflareData: PostgreSQL, ClickHouse, Redis, Kafka, PythonCore Application: Ruby on Rails, React, TypeScriptSDKs: iOS, Android, Web, Flutter, React NativeIn this role, you will:Help shape the foundation of our engineering organizationLead initiatives across the stack, with high agency in product direction and technical designDive deeply into technically challenging and rewarding work, whether it is optimizing our matching algorithms or creating world class experiences that reach millions of usersPartner with cross functional stakeholders in data and GTM to drive product direction that our customers needEmbrace an experimentation mindset - we are constantly trying to learn about how users are interacting with AI-native products, and use data from these experiments to drive our work.You might thrive in this role if you:Have experience building and scaling production quality systems and experiencesAre comfortable working across the stack, tackling new tasks out of your comfort zone, and can handle ambiguityWork well in-person and enjoy fast feedback loopsEnjoy breaking down problems and testing your hypothesesGet excited about end-to-end ownership within high agency environmentsHave been a startup founder or an early-stage engineer