Functional programming experience in Ruby, Python, or Javascript/Node.js. System design experience with focus on scale and resilience. Experience with MVC frameworks (Rails, Django, Pyramid, etc.). Ability to work on both front-end and back-end. Experience with modern front-end frameworks (React, Vue.js). SQL database experience (PostgreSQL, MySQL, SQLite). Experience with deployments to Heroku, AWS, or similar. Experience balancing swift and long-term code maintainability. 8+ years of hands-on development experience.