--- title: 'Senior Data Engineer at Mainstay Labs Inc.' canonical: 'https://feeny.ai/job/senior-data-engineer-mainstay-labs-inc-remote-whyvw163q67n' type: 'job' last_seen: '2026-10-25' --- # Senior Data Engineer at Mainstay Labs Inc. - **Company:** Mainstay Labs Inc. - **Location:** Remote - **Employment:** full-time - **Work type:** remote - **Posted:** 2026-10-23 - **Last confirmed live:** 2026-10-25 - **Apply:** https://jobs.ashbyhq.com/mainstay/a75d839c-8b16-4b40-b9b2-94a4fec8e737 ## Job description ## About Mainstay Mainstay is the leading market intelligence platform purpose built for buying, managing, and selling homes in the single family rental industry. As an AI native company, we turn complex data into clarity that helps the industry move forward with confidence. Founded within Opendoor, Mainstay launched as an independent company in 2024 and recently raised a Series A round led by Khosla Ventures. Ready to shape the future of real estate with AI? Join Mainstay and help us redefine what’s possible in the single family rental space. If you thrive on solving complex problems and want to make a tangible impact in a fast-growing industry, we’d love to hear from you - apply now and let’s move the industry forward, together! What you’ll do: As a Senior Data Engineer on the Data Platform team, you will be responsible for building data products in partnership with our data science and product teams. This is a rare opportunity where your data engineering output will be the shipped product and not just an internal resource. Our customers are businesses operating in the single-family home market and our goal is to provide them with high quality data to inform underwriting, leasing, vendor management, and more. We’re a small team dedicated to quality engineering and are looking for a technical leader to help us evolve our products and establish best practices. You’re expected to: - Architect durable data models with intuitive representations of residential real estate - Design graceful and reliable workflows to generate data assets - Inform the overall architecture of our data platform - Establish standards and best practices for data engineering - Become a domain expert in real estate ## What we’re looking for - 6+ years of experience working in data engineering or software engineering - Expertise in data architecture, data modeling, and building data pipelines at scale - Proficiency in SQL, Python, and/or Spark - Expertise in cloud data warehouses such as Snowflake, Redshift, BigQuery - Experience scheduling and operating batch data processing workflows Bonus points if you have: - Airflow, Prefect, Dagster, or a similar orchestration system - Data Warehouse (DWH) architecture and Change Data Capture (CDC) modeling techniques - Web scraping and data extraction from public or semi-structured sources - Experience with AI/ML platforms such as SageMaker, MLflow, or similar - Hands-on experience managing data platform infrastructure, with proficiency in tools such as Terraform, Docker, and AWS services 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](https://mainstay.io/privacy). 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 mainstay-recruiting@opendoor.com ## About Mainstay Labs Inc. ## Core Business - **Primary industry**: Residential real estate technology / property technology (PropTech) - **Target customers**: B2B – real estate agents, brokerages, single-family rental investors, and property managers (SMB to enterprise) - **Mission or purpose**: To be the system of intelligence for residential real estate, delivering better data, better decisions, and better outcomes across every stage of home ownership. ## Products & Services - **Mainstay Platform**: A unified system that covers the full lifecycle of a single-family rental property – buying, owning, and selling. Key features include: - **Listing & Distribution**: Agents can set their own rules (MLS or exclusive), and inventory is automatically distributed across networks. - **Offer Management**: Compare offers side-by-side with terms, contingencies, and net proceeds. - **Market Intelligence**: Aggregates and standardizes data from multiple sources to provide actionable insights for investors and property managers. - **Inventory Edge**: Gives brokerages early access to exclusive listings, serving as a recruiting and retention tool for top producers. ## Market Standing - **Valuation**: Not publicly disclosed - **Key Metric**: - Total funding: **$24.9 million** (per LinkedIn and initial Series A announcement) or **$44 million** (per PitchBook, which may include a later round in December 2025) – conflicting reports exist. - Headcount: **147 employees** (PitchBook, Built In) – up 27.6% year-over-year (LinkedIn) - **Notable Investors/Partners**: Khosla Ventures, Era Ventures, FJ Labs, Parker89, Clocktower Ventures, Inspired Capital, and the largest residential real estate platforms. - **Growth Signals**: - Monthly website traffic of ~10,120 visits with **226.5% year-over-year growth**. - 8 active job postings (as of mid-2025), with quarterly job posting growth of +14.3%. - Spun out of Opendoor, leveraging proven technology and data assets. ## Competitive Advantages - **Opendoor heritage**: Built on years of real estate data and transaction experience, giving Mainstay a head start in data quality and workflow design. - **End-to-end platform**: Connects buying, owning, and selling in a single system – a rare integration in the fragmented single-family rental market. - **Exclusive inventory network**: Brokerages can offer agents early access to off-market listings, a powerful differentiator for recruiting top talent. - **Data-driven intelligence**: Aggregates and normalizes data from disparate sources to provide a single source of truth for decision-making. ## Strategic Focus - **Current priorities**: Deepening the platform’s capabilities for small to mid-sized owner/operators, expanding market coverage, and scaling the team to support rapid customer growth. - **Direction for growth**: Continue building the “system of intelligence” for residential real estate, with emphasis on automation, predictive analytics, and seamless integration across the ownership lifecycle. ## Why Work Here - **Culture & work model**: All roles are remote within the United States (unless specified otherwise). The company emphasizes a small, high-impact team environment (“Small team. Hard problem.”). - **Perks & benefits** (per Built In and LinkedIn): - Competitive compensation with company equity - Health, dental, and vision insurance; Flexible Spending Account (FSA) - 401(k) plan - Generous parental leave and family medical leave - Life insurance and disability coverage - Customized development tracks and job training/conference support - **Engineering culture**: Modern tech stack (React, Python, Django, Kubernetes, Snowflake, GraphQL, etc.) and a focus on solving complex data challenges. The company values autonomy and ownership. - **Employee sentiment**: 3.6/5 on LinkedIn (2 reviews), with strong scores for work-life balance (4.1) and culture (3.6), though compensation rated lower (2.6). ## Sources 1. [mainstay.io](https://www.mainstay.io/) – Company homepage and product description 2. [LinkedIn](https://www.linkedin.com/company/mainstay-io) – Company details, funding, headcount, and employee growth 3. [PitchBook](https://pitchbook.com/profiles/company/616535-20) – Valuation, funding history, and investor list 4. 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