• Design, build, and maintain scalable backend services and APIs that support high-volume financial transactions and rewards workflows. • Own full feature delivery across core systems including payments, rewards, account services, and partner integrations. • Contribute to system architecture and technical design as the platform evolves and scales. • Collaborate with frontend and mobile engineers to support end-to-end feature development when fullstack work is required. • Improve reliability, performance, and observability across backend systems through testing, monitoring, and code quality practices. • Participate in sprint planning, technical reviews, and production support for mission-critical services.