Software Engineer - Platform
Company websitekoahlabs.com (Koah, opens in new tab)
Base salary $180K to $250K
Employer-published annual base salary, USD. Advertised base range in San Francisco, CA +1 more
You apply on the employer's own site. Six Figure Work does not handle applications.
- LocationSan Francisco, CA +1 more
- WorkplaceOn-site
- Status at last checkSource accepting applications when checked
- Last checked (2 h ago) · observed since
All places named
- San Francisco, CA
- New York, NY
About this job
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
The Role
We are looking for strong engineers with experience and interest in designing, building, and maintaining the infrastructure that make up our adtech platform.
You might be a fit if
You have maintained or operated serious systems in production at scale
You are detail-oriented and care about performance
You enjoy diving deep into problems and owning the platform layer that powers our product
You enjoy experimentation, measuring, and creating reliable systems
You want to own a breadth of systems
Source: Koah on Ashby · View original posting (opens in new tab)
Pay in context
This role's base floor ($180,000) is above 50% of the 4,201 Software Engineering roles in California listed on this site; 172 others list the same floor. Their median floor is $176,400; the middle half runs from $149,100 to $204,000.
Only jobs on this site count, and each one publishes a base salary of $100,000 or more, so this compares six-figure jobs with each other, not with the whole market. Computed Nov 6, 2026.
This listingSoftware Engineer - Platform$180K to $250K
Software Engineer - Product$180K to $250K
Software Engineer - Backend$180K to $250K
Data Scientist$180K to $250K
Applied Scientist$200K to $300K
Software Engineer, Early Career$120K to $160K
Chart as a table
| Role | Published base |
|---|---|
| Software Engineer - Platform (this listing) | $180K - $250K |
| Software Engineer - Product | $180K - $250K |
| Software Engineer - Backend | $180K - $250K |
| Data Scientist | $180K - $250K |
| Applied Scientist | $200K - $300K |
| Software Engineer, Early Career | $120K - $160K |
Observed changes
- First observed on the employer's board
- Began meeting the published-salary criteria
- Observed since
- Employer-stated posting date
- 2026-01-02
Where this pay comes from
Location as the employer wrote it: San Francisco • New York
USD 180,000 – 250,000 · 1 YEAR · Salary
- Method
- Structured pay field published by the employer
- Checked
- Rule set
- us-base-v2
The employer's job board publishes this pay as a dedicated data field. We read the field directly; no interpretation was needed.
What we verified
- The pay figures come from the employer's own listing, quoted exactly above.
- The pay is an annual base salary in US dollars with a minimum of at least $100,000.
- The role was publicly listed on the employer's job board when last checked.
We do not verify what the employer will actually offer, whether the employer is still recruiting for the role, or anything beyond what the employer published. Full methodology.