Mainstay
Senior Full-Stack Software Engineer, AI
San Francisco Bay Area · Hybrid · Senior · Full-time · Posted Jul 27, 2026
- Experience
- 5+ years.
About the job
Build and operate full-stack, AI-powered workflow products and scalable services that make complex real estate data useful for investor decisions.
What you'll do
- Develop backend services, APIs, and product experiences for AI features and large real estate datasets.
- Evaluate LLM performance and improve production reliability, performance, and maintainability.
- Own product development end to end and collaborate across teams, including mentoring engineers.
What they ask for
- 5+ years building and shipping production-grade software in fast-paced, early-stage startups.
- Hands-on experience developing and deploying production-ready AI features.
- Strong full-stack skills with a backend-first orientation and deep experience designing and operating scalable backend systems, ideally in Python.
- Solid frontend experience with React or similar modern frameworks.
Nice to have
- Experience with data-heavy, analytics-driven, or workflow-oriented systems.
Tools
Python, TypeScript, FastAPI, Django, React, Next.js, Airflow, dbt
AI focus
Ship production AI features end to end, including retrieval pipelines and guardrails; evaluate and benchmark LLM latency, cost, accuracy, and hallucination rates.
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