Senior Software Engineer, Full Stack
Company websiteantithesis.com (Antithesis, opens in new tab)
Base salary $160K to $220K
Employer-published annual base salary, USD. Advertised base range in Vienna, VA
You apply on the employer's own site. Six Figure Work does not handle applications.
- LocationVienna, VA
- WorkplaceOn-site
- Status at last checkSource accepting applications when checked
- Last checked (3 h ago) · observed since
About this job
About Antithesis:
We've been quietly reinventing how the world thinks about software reliability, and we're just getting started! At Antithesis, we start at the foundations – we run entire software systems inside a deterministic simulation and break them in every way imaginable. Every issue then comes with a perfect reproduction, so you can identify root causes fast instead of spending days trying to recreate what went wrong.
The rise of AI-generated code has made this work more urgent than ever. Agents can write code faster than any human, but speed doesn't matter much when the output is buggy, stuck in review, or slipping through undetected. The verification bottleneck is real, it's growing, and solving it is one of the most consequential problems in software right now. That's what you'd be working on.
We're well-funded and deeply technical, the kind of place where the hardest problems get the most attention and the best ideas win regardless of who has them. If you want to do work that actually moves the needle on how reliable software can be, keep reading.
About the Role:
Antithesis is looking for a Full Stack Engineer to join our engineering team. This role primarily focuses on the Notebook - the reactive computing platform that all Antithesis UX is built on top of. As a Notebook Engineer, you will do a mix of deeply technical and heavily product-focused work.
What You’ll Do:
Make improvements to a reactive engine for executing Javascript (imagine Jupyter where everything auto recalcs).
Own a new feature, from the front end to the data layer. This includes adding features as needed to our custom database (or proxy, or API server) to get the feature done.
Create Property Based Tests and Antithesis workloads to test the things you create.
Work with our product managers to design and scope features.
Develop build and deployment logic in Nix.
What We’re Looking For:
Experience working with complex customer facing-products.
Be very comfortable with Typescript, and ready to pick up a bit of Rust work.
Have strong technical skills and a solid programming background in algorithms and data structures.
Experience building static and dynamic websites
Understanding of how the internet and browsers work
(bonus) experience with Nix
(bonus) have ideas about leveraging AI effectively
(bonus) a prior history with PBT
Source: Antithesis on Ashby · View original posting (opens in new tab)
Pay in context
This role's base floor ($160,000) is above 50% of the 527 Software Engineering roles in Virginia listed on this site; 2 others list the same floor. Their median floor is $159,000; the middle half runs from $131,278 to $179,700.
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 listingSenior Software Engineer, Full Stack$160K to $220K
Contracts Manager$160K to $180K
Applied AI Software Engineer$155K to $185K
Senior Systems Engineer, Database$170K to $250K
Senior Solutions Engineer$175K to $220K
Engineering Manager$185K to $250K
Billing & Revenue Ops Manager$130K to $160K
Chart as a table
| Role | Published base |
|---|---|
| Senior Software Engineer, Full Stack (this listing) | $160K - $220K |
| Contracts Manager | $160K - $180K |
| Applied AI Software Engineer | $155K - $185K |
| Senior Systems Engineer, Database | $170K - $250K |
| Senior Solutions Engineer | $175K - $220K |
| Engineering Manager | $185K - $250K |
| Billing & Revenue Ops Manager | $130K - $160K |
Observed changes
- Began meeting the published-salary criteria
- First observed on the employer's board
- Observed since
- Employer-stated posting date
- 2026-10-07
Where this pay comes from
Location as the employer wrote it: Vienna, VA, USA
USD 160,000 – 220,000 · 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.