Software Engineer Data ML at Koah Labs

Who we areKoah 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.Were a small tight-knit team in San Francisco with backgrounds at X Apple and early-stage startups. Weve raised $5.7M from top investors and are growing fast with real traction on both the publisher and advertiser sides.Working at Koah means joining at the ground floor: youll ship code that shapes the company and the ecosystem were building. We move quickly operate with high trust and care deeply about craft.ToolingInfra: Render (app workers) AWS (RDS S3 Kafka) Grafana for metrics and logsData: PostgreSQL (primary) ClickHouse (analytics) Redis (caching & rate limiting)Core Stack: Ruby on Rails React TypeScriptSDKs: Flutter React Native Android (Kotlin Compose) iOS (Swift)Were looking for engineers who like digging into systems and making them fast reliable and easy to operate. Youll help us deliver ads quickly track performance accurately and scale the platform as we grow. Were building systems that will soon operate at the scale of modern analytics platforms high-volume low-latency and deeply queryable.Example projectsBuild data pipelines using Debezium to stream real-time changes from PostgreSQL to our OLAP database for analytics workloadsReduce p99 latency in critical write paths by optimizing SQL query execution plans implementing robust retry mechanisms and enforcing strict timeouts for third-party servicesTune conversion and clickthrough rate metrics in our core ad matcher from analyzing impression and click dataEnhance ad matching algorithms using regression analysis to identify data patterns and develop hypotheses for new predictive features that improve conversion likelihoodSet up experiment tracking and observability with logs and custom metrics that make it easy for us to understand why certain ads are chosenYou might be a fit if You like debugging and optimizing performanceYou are detail oriented and use data to support your claimsYou enjoy digging deeply and owning the platform side supporting productYou enjoy experimentation measuring and creating reliable systemsIf youre interested please send an email to with your full name email address and resume. Key Skills Anti Money Laundering,Employee Relations,Actuarial,Attorney At Law,Big Data,Filing Employment Type : Full-Time Department / Functional Area: Engineering Experience: years Vacancy: 1 Monthly Salary Salary: 180 - 300