Senior Software Engineer

Mainstay Labs Inc.

96d

About The Position

Mainstay is the leading market intelligence platform purpose-built for buying, managing, and selling homes in the single-family rental industry. We empower informed decision-making and unlock opportunities for owners, operators, and residents by aggregating and standardizing data from over 50 unique sources. Originally founded within Opendoor, Mainstay launched as an independent company in 2024, driven by our mission to simplify the complex and bring clarity and trust to the single-family rental ecosystem. Join us as we reshape the future of the industry! As a full-stack senior software engineer, you will have maximum agency, tight feedback loops with customers, and face product challenges that directly translate to business value. You’ll have the opportunity to design, build, and ship complex systems and tools that enable teams to execute at scale.

Requirements

• 5+ years of experience building and delivering production-grade software, ideally in fast-paced, high-growth startup environments.
• Strong full-stack engineering skills, with a focus on backend scalability and system reliability.
• Experience designing, building, and evolving scalable systems and services.
• Clear, concise communicator - essential for our remote, highly collaborative team.
• Proactive and ownership-driven - comfortable navigating ambiguity and shifting priorities.
• Customer-focused mindset with a drive to build solutions that solve real problems.
• Strong Python background; experience with TypeScript and React is also a plus.
• Experience with workflow automation or complex data integration is a plus.

Nice To Haves

• Experience with workflow automation or complex data integration.

Responsibilities

• Contribute to all phases of product development, from ideation and prototyping to implementation and iteration.
• Build and evolve both frontend product experiences and backend services that power them.
• Design reliable and scalable backend services to support new features in production.
• Modernize and automate legacy workflows in the real estate industry.
• Define and ship useful features in partnership with cross-functional teams.
• Mentor and support the growth of other engineers on the team.
• Collaborate closely with product managers, designers, and operators to identify and solve customer pain points.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior