Koah
Software Engineer, Early Career
- Location
- San Francisco, CA, US
- Arrangement
- On-site
- Employment type
- Full-time
- Posted
- 18 August 2026 (about a month ago)
Checked 29 days agoApplications go to the employer, never to RoleSprint
About this role
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: 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 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.
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 https://app.notion.com/p/Koah-Labs-Take-Home-OA-3c6cbbc66b0f8027bcbec3ff8ccd25d0
Work location
- San Francisco, CA, US
Related jobs
Ready to make a decision?
This role is either worth your time or it isn’t.
Analyze the posting against your experience, see the gaps clearly, and build the right materials only if the opportunity makes sense.
Nothing is submitted automatically. You choose what happens next.
About this listing
Published on Ashby under the board identifier Koahlabs, which is the name the employer’s own job board carries. RoleSprint has not verified the company’s registered or trading name, so it is shown exactly as published rather than tidied up.
RoleSprint is not the employer and not a recruiter. Applications are made on the employer’s own site and never reach us; what RoleSprint does is help you decide whether a role is worth your time and prepare for it if it is.
Published 18 August 2026, last checked 29 days ago. A posting stops being advertised here 90 days after the employer published it, and one the employer takes down is marked closed rather than quietly removed.