We're a stealth-stage startup building a dual-sided, event-driven SaaS platform in one of the fastest-scaling B2B verticals in the GCC. The platform sits at the intersection of real-time data orchestration, LLM-powered decision engines, and multi-tenant financial computation. This role is pure technical ownership architecture, stack, infrastructure, and team are yours to define and build from Day 1.

• Design and ship a multi-tenant SaaS architecture with row-level data isolation, RBAC, and column-level PII encryption compliant with UAE PDPL and regional data residency requirements
• Build and own a bi-directional event-driven sync layer sub-5s propagation, 1,000+ events/second throughput, with failure recovery and event replay logic
• Engineer a configurable financial computation engine waterfall logic, retroactive recalculation across open records, VAT handling, and a fully auditable immutable transaction ledger
• Integra...