Senior Software Engineer (FBG Enterprises Opco, LLC, New York, NY) Architect and lead the end-to-end design of large-scale, multi-tier distributed systems, including authoring technical specs, conducting architecture/design reviews, and ensuring integration, performance, and scalability across services; Design and operate fault-tolerant, low-latency systems at internet scale, including data partitioning/sharding and consistency strategies, and recovery mechanisms (e.g., idempotent processing, b