Mainstay Tech Stack

Market intelligence and operations platform for single-family rental owners

Real Estate San Francisco, California 51–200 employees Founded 2024 Privately Held

Mainstay spun out from Opendoor in 2024 to build data and operational tools for the single-family rental market. The tech stack reveals a data-first orientation—Snowflake, Redshift, BigQuery, Python, Spark, and SageMaker sit alongside Salesforce and React—suggesting the company is balancing analytical infrastructure with customer-facing products. Active hiring across ops, sales, and engineering, combined with projects focused on data modeling and operating-system scaling, indicates Mainstay is moving quickly to operationalize workflows and automate manual processes that plague the rental ecosystem.

Tech Stack 21 technologies

Core StackSalesforce Slack Snowflake Redshift BigQuery Python Apache Spark Terraform Docker AWS SageMaker MLflow TypeScript React Google Workspace macOS SQL Excel

What Mainstay Is Building

◆Challenges

Building a pool of qualified agents
Scaling operating system
Modernizing legacy workflows
Meeting fluctuating customer demand
Process maturity
Tooling adoption
Client delivery challenges
Modernize and automate legacy workflows
Operational reliability
Execution rigor

▲Active Projects

Modernize legacy workflows
Building data products
Architecting durable data models
Designing data workflows
Operating system scaling
Tooling rollout
Analytics backbone
Pilot new concepts and scale winners
Core operational functions improvement
Client onboarding and expansion

Hiring Activity

Steady15 roles · 5 in 30d

Department

Ops

Sales

Engineering

Data

Operations

Seniority

Mid

Senior

Director

Lead

Staff

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About Mainstay

Mainstay provides data intelligence and operational tools for owners, operators, and residents in the single-family rental market. Founded in 2024 as a spinout from Opendoor, the company operates from San Francisco with 51–200 employees. The product combines market analytics (powered by data warehousing and ML infrastructure) with purpose-built operational software. Current focus areas include modernizing legacy workflows, scaling the core operating system, building data products, and improving client onboarding and retention. The organization is addressing core pain points around process maturity, tooling adoption, and operational reliability.

HeadquartersSan Francisco, California

Company Size51–200 employees

Founded2024

Hiring MarketsUnited States

Frequently Asked Questions

What is Mainstay's tech stack?

Mainstay uses Salesforce, Snowflake, Redshift, BigQuery, Python, Apache Spark, SageMaker, React, TypeScript, Terraform, Docker, and AWS. The emphasis on data warehousing (Snowflake/Redshift/BigQuery) and ML infrastructure (SageMaker/MLflow) reflects a data-driven product strategy.

Where is Mainstay headquartered?

Mainstay is headquartered in San Francisco, California. The company was founded in 2024 as an independent spinout from Opendoor and hires across the United States.