Mainstay is a market intelligence platform for large real-estate operators. We’re an AI-native company focused on turning complex, messy, real-world data into systems customers actually trust to make financial decisions. Mainstay was incubated at Opendoor, spun out in 2024, and recently raised a Series A led by Khosla Ventures.
We’re hiring a Senior/Staff Software Engineers, but we care more about ownership and judgment than title.
You'll work on:
- Designing and evolving foundational data models used across the platform
- Building backend services, workflows, and automation systems end-to-end
- Applying AI/LLMs pragmatically (automation, reasoning over messy inputs, decision support)
- Shipping user-facing product features tied directly to real customer workflows
- Owning problems from idea → production → iteration
Stack: Python, TypeScript, React, AWS
Check out the roles at: https://www.mainstay.io/careers