Software Engineer - Test Automation (SDET)
Company websitemach9.ai (Mach9, opens in new tab)
Base salary $130K to $170K
Employer-published annual base salary, USD. Advertised base range in San Francisco, CA
You apply on the employer's own site. Six Figure Work does not handle applications.
- LocationSan Francisco, CA
- WorkplaceOn-site
- Status at last checkSource accepting applications when checked
- Last checked (3 h ago) · observed since
About this job
The role
At Mach9, Test Automation Engineers protect the workflows that civil engineers and surveyors rely on when they work in our browser-based 3D CAD platform. Coding agents do a growing share of our development work, but that only works when we have automated checks that return fast, trustworthy answers. You'll own the accuracy of those answers — giving us coverage that spans from data upload to deliverable export — and the test infrastructure it runs on.
This role is ideal for engineers who have built and maintained automated test suites for production web applications and can chase a failure through app code and infrastructure all the way to its root cause.
Working closely with our platform engineers, you'll help us ship confidently while shipping quickly. Success in this role will mean that our regressions will be caught by tests rather than by customers, and our engineers and agents will move faster because they'll know that your tests tell them immediately when they break something.
Where you will make an impact
Grow automated coverage across our CAD editor and drive pages
Evolve our test infrastructure and CI so our test suite stays fast and reliable as its coverage grows
Build tools for coding agents to reproduce the failures and artifacts that they need to diagnose regressions and verify fixes
Root out flaky tests so a failing build always means there's a real bug
Make our 3D editor more testable so we can automatically test our users' CAD workflows
Help other engineers write testable code and durable tests to go with every feature
What you bring
3+ years building and maintaining automated test suites for production web applications with Playwright, Cypress, WebdriverIO, or similar
Proficiency in TypeScript or JavaScript, and comfort reading and changing application code
Experience building or substantially evolving an E2E test framework: fixtures, test data, isolation, parallel execution, and flakiness control
Experience integrating tests into CI and keeping pipelines fast and reliable
Interest in AI-assisted development and using agents to improve software quality
Experience with performance regression tracking
Experience testing CAD, 3D, geospatial, mapping, high performance editor, or gaming products
About Mach9
Mach9 is transforming civil infrastructure design with AI-powered geospatial tools. Our platform accelerates the creation of engineering deliverables from raw data, cutting manual drafting time by 96×. Trusted by global leaders in engineering and construction, we're backed by Y Combinator, Quiet Capital, and top founders and executives from Cruise, Autodesk, Adobe, and DoorDash.
We believe the needs of a startup benefit from an in-person culture. The team works from our office in SoMa five days a week, with flexibility when needed. Visa sponsorship is available for this role.
Source: Mach9 on Ashby · View original posting (opens in new tab)
Pay in context
This role's base floor ($130,000) is above 11% of the 4,198 Software Engineering roles in California listed on this site; 55 others list the same floor. Their median floor is $176,550; the middle half runs from $149,200 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 - Test Automation (SDET)$130K to $170K
Software Engineer - 3D Graphics$130K to $180K
Head of Growth$180K to $220K
Chart as a table
| Role | Published base |
|---|---|
| Software Engineer - Test Automation (SDET) (this listing) | $130K - $170K |
| Software Engineer - 3D Graphics | $130K - $180K |
| Head of Growth | $180K - $220K |
Observed changes
- First observed on the employer's board
- Began meeting the published-salary criteria
- Observed since
- Employer-stated posting date
- 2026-09-04
Where this pay comes from
Location as the employer wrote it: San Francisco
USD 130,000 – 170,000 · 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.