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Koah · 3 months ago

Software Engineer - Data / ML

San Francisco

Full-time

Onsite

Entry, Mid Level

$180K/yr - $300K/yr

Koah Labs is building the ad network to power the next generation of AI-native products. They are seeking a Software Engineer to help deliver ads quickly, track performance accurately, and scale the platform as they grow.

AdvertisingAdvertising PlatformsArtificial Intelligence (AI)Sales

Responsibilities

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

Qualification

PostgreSQLRuby on RailsAWSTypeScriptData pipelinesDebuggingPerformance optimizationExperimentation

Required

Experience with data pipelines and streaming technologies such as Debezium

Strong understanding of SQL and experience optimizing SQL query execution plans

Experience with PostgreSQL and OLAP databases

Ability to analyze data patterns and develop hypotheses for predictive features

Experience with performance debugging and optimization

Detail-oriented with a data-driven approach

Experience in building reliable systems and conducting experiments

Familiarity with ad matching algorithms and metrics tuning

Preferred

Experience with AWS services such as RDS and S3

Familiarity with Grafana for metrics and logs

Experience with Ruby on Rails, React, and TypeScript

Knowledge of caching and rate limiting using Redis

Experience with mobile SDKs such as Flutter, React Native, Android (Kotlin, Compose), and iOS (Swift)

Company

Koah

Koah is the GenAI Ad Network: Publishers can monetize AI chat without compromising UX — and advertisers can reach high-intent users with 1:1 engagement inside GenAI environments.

Founded in 2024

San Francisco, California, USA

2-10 employees

https://www.koahlabs.com/

Funding

Current Stage

Early Stage

Total Funding

$5M

Key Investors

Forerunner

2025-09-07Seed· $5M

2024-01-01Pre Seed

Company data provided by crunchbase