Strong backend engineering expertise, ideally in Java (or Kotlin). Experience building distributed systems, APIs, or large-scale recommendation or personalization services. Understanding of microservice architecture and cloud infrastructure (AWS or GCP). Makes thoughtful, data-driven decisions. Experience working with machine learning–powered recommendations or routing engines (bonus). Familiarity with event-driven architectures or streaming platforms like Kafka or Pub/Sub (bonus). Background in customer onboarding, personalization, or journey optimization products (bonus).