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Our mission is to help publishers monetize and help advertisers reach the right audience - without compromising speed, UX, or privacy.\nWe’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.\nWorking 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.\nOur Stack\nInfra: Terraform, AWS, LGTM (Loki, Grafana, Tempo, Mimir), Tailscale, Cloudflare\n\nData: PostgreSQL, ClickHouse, Redis, Kafka, Python\n\nCore Application: Ruby on Rails, React, TypeScript\n\nSDKs: iOS, Android, Web, Flutter, React Native\n\nIn this role, you will:\nHelp shape the foundation of our engineering organization\n\nLead initiatives across the stack, with high agency in product direction and technical design\n\nDive deeply into technically challenging and rewarding work, whether it is optimizing our matching algorithms or creating world class experiences that reach millions of users\n\nPartner with cross functional stakeholders in data and GTM to drive product direction that our customers need\n\nEmbrace 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.\n\nYou might 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