Antithesis
Senior Software Engineer, Full Stack
$160K–$220K
Vienna, VA, USA · On-site · Senior · Full-time · Posted Oct 7, 2026
About the job
Build and improve Antithesis’s reactive Notebook platform, delivering features across its frontend, data layer, and supporting infrastructure.
What you'll do
- Improve the reactive engine for executing JavaScript.
- Own features across the frontend and data layer, including changes to the custom database, proxy, or API server.
- Create property-based tests and Antithesis workloads; develop build and deployment logic in Nix.
What they ask for
- Experience working with complex customer-facing products.
- Comfort with TypeScript and willingness to take on some Rust work.
- Strong programming background in algorithms and data structures.
- Experience building static and dynamic websites, and understanding of the internet and browsers.
Nice to have
- Experience with Nix.
- Ideas about leveraging AI effectively or prior experience with PBT.
Pay
$160K – $220K USD base salary
Tools
JavaScript, Typescript, Rust, Nix
AI focus
The role focuses on software reliability and verification in the context of AI-generated code; leveraging AI effectively is a bonus.
Model-written summary · the original posting is authoritative