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Founding Software Engineer (Data/ML)

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Koah Labs

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Location:
United States , San Francisco

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Contract Type:
Not provided

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Salary:

150000.00 - 300000.00 USD / Year

Job Description:

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, and early-stage startups. We’ve 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: 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.

Job Responsibility:

  • Build data pipelines using Debezium to stream real-time changes from PostgreSQL to our OLAP database for analytics workloads
  • Reduce p99 latency in critical write paths by optimizing SQL query execution plans, implementing robust retry mechanisms, and enforcing strict timeouts for third-party services
  • Tune conversion and clickthrough rate metrics in our core ad matcher from analyzing impression and click data
  • Enhance ad matching algorithms using regression analysis to identify data patterns and develop hypotheses for new predictive features that improve conversion likelihood
  • Set up experiment tracking and observability with logs and custom metrics that make it easy for us to understand why certain ads are chosen

Requirements:

  • You like debugging and optimizing performance
  • You are detail oriented and use data to support your claims
  • You enjoy digging deeply and owning the platform side supporting product
  • You enjoy experimentation, measuring, and creating reliable systems
What we offer:
  • Meaningful Equity
  • Offers Bonus

Additional Information:

Job Posted:
December 09, 2025

Employment Type:
Fulltime
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