Software Engineer - Backend

KoahSan Francisco, California

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Overview

Schedule

Full-time

Career level

Senior-level

Job Description

Who We Are

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, 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, Cloudflare
Data: PostgreSQL, ClickHouse, Redis, Kafka, Python
Core Application: Ruby on Rails, React, TypeScript
SDKs: Flutter, React Native, Android, iOS

Example projects

Build scalable data models that support multiple impressions for an ad request allowing us to align publisher and advertiser interests
Design abstractions that allow us to experiment and ship new formats that allow for a flexible way of tracking engagement events
Build a low-latency frequency capping system to improve an end user's experience and prevent ad fatigue
Create schemas to represent high-volume ad bidding with ad exchanges to increase the diversity of the ad demand on platform

You might be a fit if

You like debugging and optimizing performance
You are detail oriented and like to create good abstractions that others rely on
You enjoy experimentation, measuring, and creating reliable systems

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FAQs About Software Engineer - Backend Jobs at Koah

What is the work location for this position at Koah?

This job at Koah is located in San Francisco, California, according to the details provided by the employer. Some roles may also include multiple work locations depending on the requirement.

What pay range can candidates expect for this role at Koah?

Employer has not shared pay details for this role.

What employment applies to this position at Koah?

Koah lists this role as a Full-time position.

What experience level is required for this role at Koah?

Koah is looking for a candidate with "Senior-level" experience level.

What is the process to apply for this position at Koah?

You can apply for this role at Koah either through Sonara's automated application system, which helps you submit applications 10X faster with minimal effort, or by applying manually using the direct link on the job page.