Senior Software Engineer II (ML Ops), Marketplace (Copy) (Copy)

Apartment List is a marketplace company helping property partners list and manage rental properties for prospective renters. The Senior Software Engineer II will own scalable backend services and deliver full-stack features for the Lister experience, while shaping technical direction, mentoring engineers, and partnering with product, design, analytics, and other engineering teams.

Responsibilities:

• Own the design and delivery of scalable backend services that power the Lister experience, from architecture decisions through production reliability
• Drive full-stack feature delivery — from Kotlin/Ruby services to TypeScript/React interfaces — in close partnership with product, design, and analytics
• Shape technical solutions for ambiguous problems, weighing speed against long-term maintainability and making the call
• Partner with engineering teams across Apartment List to keep solutions consistent and cohesive for both renters and property partners
• Raise the technical bar for the team through code reviews, pairing, and design discussions — mentoring engineers earlier in their careers
• Contribute to Lister's technical roadmap, surfacing tradeoffs and opportunities that product and engineering leadership should know about

Requirements:

• 5+ years of professional software engineering experience in organizations that prioritize quality, scalability, and performance
• Strong grounding in computer science fundamentals — data structures, algorithms, and distributed systems
• Demonstrated experience designing and implementing RESTful APIs
• Experience with relational databases and data modeling
• Working proficiency in at least one of Kotlin, Ruby, or TypeScript, with willingness to build fluency in the others
• Experience working across the stack, from backend services through frontend applications
• Practical experience using AI-assisted development tools (e.g., Copilot, Claude Code, or similar) to speed up real engineering work, with sound judgment about when and how to apply them
• Demonstrated ability to communicate and collaborate effectively with product managers, designers, and analysts
• Mentorship experience for other engineers
• Experience with search or recommendation systems
• Experience working in an online marketplace
• Familiarity with real-time systems, particularly in the context of optimizing latency and performance