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Senior Software Engineer at Mainstay Labs Inc.. Remote Location: United States | Remote. About Mainstay. Are you ready to be a part of something groundbreaking? 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!. About the role. What you should expect as a full-stack senior software engineer: maximum agency, tight feedback loops with customers, and no shortage of 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.. We're looking for someone who can build robust, reliable, and production-ready features end to end, from backend systems and retrieval pipelines to user-facing product experiences. Our products are built with Python, TypeScript, and React on AWS.. What you'll do. In this role, you'll shape solutions from the ground up - owning backend and frontend design, automating complex workflows, and directly applying user feedback. You'll help set technical direction for the team, mentor other engineers, and turn big ideas into products that create real impact for our customers and the business.. In this role, you will:. 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 we’re looking for. 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.. #LI-AW. Mainstay Built on Trust. At Mainstay, trust is at the core of everything we do. We build trust with everyone -- from candidates to employees to partners. We believe in fairness and openness throughout our hiring process, evaluating candidates based on qualifications without regard to race, color, religion, national origin, age, gender, marital status, disability, veteran status, sexual orientation, gender identity, or any other protected status. Our privacy practices describe how we handle applicant information, you can find the policy details for . California residents here. .. We are committed to providing reasonable accommodations throughout our recruitment processes for candidates with disabilities, pregnancy, religious beliefs, or other reasons protected by applicable laws. If you require assistance or a reasonable accommodation, please contact us at [email protected]