Mainstay

Full-stack Engineer

• Mainstay: market intelligence platform for buying, managing, and selling homes in the single-family rental industry, aggregating and standardizing data from 50+ sources
• Role: Senior full-stack software engineer focused on Applied AI, designing, building, and shipping AI-powered workflow management systems and tools
• Responsibilities include fine-tuning and optimizing models, designing retrieval pipelines and guardrails, building scalable backend services, and creating user-facing product experiences
• Work closely with product managers, designers, and operators to bring AI features from idea to launch while balancing innovation with stability
• Monitor LLM performance, safety, and cost in production; tune prompts and implement retrieval strategies such as RAG and vector stores; mentor other engineers

Senior Software Engineer, Applied AI