Experience working in a high-velocity software development organization Proficient at building software that powers and relies on the web (real-time browser networking, optimizing proxies, scrapers) Ability to build high-quality REST APIs (Python preferred, TypeScript/Go OK) Proficient with relational databases and application-style SQL Ability to write SQL by hand, including joins and aggregations Proficient writing unit tests and designing for testability Experience with designing, building and operating cloud services (application load balancers, cloud storage, message queues)