Senior Software Engineer responsible for developing scalable, resilient web-based solutions for AppFolio's SaaS leasing platform. You will lead technical projects end-to-end, mentor engineers, optimize algorithms and database queries for performance, and drive engineering excellence through TDD and CI/CD practices. The role requires 5+ years building and scaling web applications, proficiency in modern languages (Ruby, Java, or Python), and experience leading cross-functional technical initiatives. You'll work across the full development stack while championing clean architecture, automated testing, and continuous improvement.