Senior Software Engineer - NBA

We are seeking an accomplished Senior Software Engineer to design, implement, and operate mission-critical stateful services that form the backbone of real-time, automated decisioning and personalization platforms. These systems are responsible for maintaining authoritative state, orchestrating lifecycle transitions, and ensuring reliable downstream effects—often in high-concurrency, low-latency environments.

This position is ideal for engineers with a strong grasp of state machines, idempotency, distributed systems, and “exactly-once” execution semantics. You will also employ advanced AI-assisted and agentic engineering tools to drive correctness, velocity, resilience, and scalability.

• Design, build, and maintain explicit state machines governing:
• Lifecycle transitions (e.g., open → in progress → completed → suppressed)
• Validation of permissible transitions
• Time-based and event-driven changes
• Ensure state machines are:
• Clearly modeled and not hidden in code logic
• Deterministic, reproducible, and auditable
• Easily understood and testable
• Robust against illegal or duplicate transitions through comprehensive validation

• Architect and manage transactional state stores serving as the single source of truth
• Support safe, high-concurrency read/write operations
• Uphold system in variants across partial failures and recovery scenarios
• Implement robust idempotency controls so:
• Requests can be safely retried
• Commands execute at most once
• Duplicate events do not compromise state integrity
• Develop APIs and workflows resilient to retries, restarts, and replay events

• Employ the outbox pattern to guarantee atomicity of state updates and event publication
• Prevent loss or duplication of side effects
• Maintain clear separation between state mutation and downstream event delivery
• Facilitate replay, backfill, and recovery operations without breaching state guarantees
• Integrate seamlessly with messaging and streaming platforms, ensuring fault tolerance

• Design for correctness under concurrent updates, network partitions, partial failures, and service redeployments
• Apply expertise in: