Experience with LAMP stack, node servers, or other modern web app development stacks Experience with OOP concepts and design patterns Proficiency in a modern web-based language and environment Experience crafting efficient SQL queries Strong knowledge of security best practices (CSRF, XSS, encryption, SQL injection) Experience with PHP (8+) and modern PHP development (Bonus) Experience with cross-client email design (Bonus) Experience with queues and asynchronous processing (Bonus) Experience with test-driven development (Bonus) Experience with PCI & other data security compliance (Bonus) Experience debugging performance/stability issues (Bonus) Experience with AWS (Bonus) Experience with Docker (Bonus) Experience with Elasticsearch or other NoSQL datastores (Bonus)