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Mainstay is hiring a
Senior/Staff Software Engineer

About Mainstay

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.

Job Description

We’re hiring 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), and shipping user-facing product features tied directly to real customer workflows. Stack: Python, TypeScript, React, AWS.

Remote

Remote Conditions

US only

Salary

Not Specified

Benefits

Not Specified

Tech Tags

AWSPythonReactTypescript

Senior Role

Date Listed

02 February, 2026 (3 months ago)
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