Own technical health of Phone Billing: identify bottlenecks, correctness/reliability risks
Drive end-to-end high-impact initiatives from problem definition to architecture, implementation
Architect for massive scale: core Phone platform components, CPaaS abstractions, provider adapters
Own Phone Billing: usage metering, rating, reserve/commit lifecycle, idempotency, reconciliation
Evolve Revenue Growth into configuration-driven, rules-based platform
Work with NestJS, Firestore, MongoDB, PostgreSQL, Redis, queuing systems, data warehousing

🎯 Requirements

8+ years backend engineering experience, 2+ years in Staff role
Deep expertise in distributed systems, event-driven architectures, asynchronous job processing
Experience with correctness-critical domains: metering, ledgers, billing, payments
Proven experience optimizing availability, performance, reliability
Strong relational/NoSQL data modeling
Experience designing policy- or rules-driven systems

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