We are about to kick-off a green-field Direct Sales Agent management product and I need a senior mobile architect to design the technical foundation before any code is written. The app must launch on both iOS and Android from day one and stay flexible enough to serve multiple Banking and NBFC clients through simple configuration. Core business capabilities to support in the first release are clear: agent/client onboarding and management, granular performance tracking, and tight integration with core banking or financial systems. Looking ahead, we already know the platform will have to plug into payment gateways, CRM systems, data-analytics tools, a Loan Origination System, and even an ERP layer such as SAP, so the architecture cannot be monolithic. I expect you to map out an opinionated yet future-proof blueprint that covers: • Recommended mobile stack (native, Flutter, React Native—or a justified mix) with an explanation of how it will meet performance, security, and compliance needs. • Scalable backend and integration strategy (micro-services vs serverless, API gateway patterns, OAuth2/SSO, message queues, etc.). • Multi-tenant configuration model so onboarding a new bank is a matter of settings, not rewrites. • Data, caching, and analytics approach that handles both offline mode and near-real-time dashboards for agent performance. • CI/CD pipeline outline, automated testing strategy, store-deployment workflow, and observability plan. • Security hardening guidelines suitable for regulated financial environments. Deliverables 1. Comprehensive architecture document (diagrams, tech stack justification, growth roadmap). 2. High-level API contract set for the first-wave integrations (banking core, payments, CRM, analytics, LOS, SAP). 3. Skeleton project or proof-of-concept repositories that compile on iOS and Android and demonstrate modular plug-in capability. 4. Acceptance checklist so future development teams can validate compliance with your design. Acceptance criteria • The POC builds and runs on current iOS & Android versions without platform-specific rewrites. • New tenant settings can be added through config files only. • External service adapters are abstracted behind documented interfaces. • All components pass baseline unit tests and static security scans. If this sounds like the sort of architectural challenge you enjoy, let’s talk.