Koah
MarTech & AdTechDirect Ashby career site

Software Engineer, Early Career

Location
San Francisco, CA · On-site
Job type
Full-time
Level
Entry level
Listed
30 days ago

Skills & highlights for this role

  • Ruby on Rails
  • React
  • TypeScript

Also useful

  • PostgreSQL
  • ClickHouse
  • Kafka
  • Terraform

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: iOS, Android, Web, Flutter, React Native

In this role, you will

  • Help shape core ad experiences and shape how people see ads across our ad network
  • Tackle meaningful challenges with increasing autonomy, crafting code that millions of users will experience
  • Take ownership of projects that matter, make critical technical decisions, and contribute your unique perspective to our product vision.
  • Work alongside passionate experts across design, product, and data to create the advertising experience in this new era

You might thrive in this role if you

  • Enjoy proactively communicating with both technical and non-technical stakeholders
  • Are comfortable working across the stack, tackling new tasks out of your comfort zone, and can handle ambiguity
  • Work well in-person and enjoy fast feedback loops
  • Enjoy breaking down problems and testing your hypotheses
  • Get excited about end-to-end ownership within high agency environments

Want to Stand Out?

  • We’ve put together a short, optional take-home assessment. It’s not required to apply, but completing it is highly encouraged and will help us prioritize reviewing your application.
  • Complete the optional take-home assessment

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.

Equal opportunity and legal notices

We receive a high volume of applications, and we want to give everyone a fair chance to show us what they can do beyond their resume.

Read the original posting

From Koah's careers page, first listed on Rolev.ai on October 10, 2026. Rolev.ai is not the employer.

How Rolev.ai helps with this application

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Common questions

Where is the Software Engineer, Early Career job at Koah located?

This Software Engineer, Early Career position at Koah is located in San Francisco, CA (On-site). Always check Koah's application page for specific state eligibility or relocation policies.

What qualifications are required for Software Engineer, Early Career at Koah?

For the Software Engineer, Early Career role, Koah highlights experience with Ruby on Rails, React, TypeScript. Rolev.ai can score your existing resume against these requirements and show any skill gaps before you apply.

How do I apply for the Software Engineer, Early Career position at Koah?

This listing links directly to Koah's Ashby application page. You can apply directly on Koah's site, or use Rolev.ai to check your resume fit, generate a zero-hallucination tailored resume and cover letter for this posting, and autofill the Ashby application form in 1 click with the Rolev.ai Chrome extension. You always review the form and press Submit yourself.

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