Senior Software Engineer - NBA

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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.

• 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:
  • Idempotency keys
  • Optimistic and pessimistic locking strategies
  • Event ordering and causality
• Balance rigorous correctness with performance and latency requirements

• Leverage AI-powered and agentic tools to:
  • Automatically generate and validate state transition tests
  • Probe edge cases and concurrency challenges
  • Assist in code reviews, refactoring, and documentation
  • Accelerate debugging, incident analysis, and root cause discovery
• Use AI responsibly to enhance productivity while maintaining clarity and system integrity

• Engineer services with robust observability through:
  • Structured logging, metrics, and alerting
  • Distributed tracing
• Ensure all state transitions and emitted events are:
  • Fully traceable and reproducible
  • Auditable for compliance and investigative needs

• Partner with platform, data, and quality engineering teams to assure end-to-end reliability
• Participate in architecture and design reviews to elevate system quality standards
• Mentor and guide engineers on best practices for safe, reliable, and maintainable distributed systems

• Bachelor's degree in computer science or related field
• 6+ years of experience in backend or platform engineering
• Demonstrated hands-on expertise with:
  • State machine modeling and lifecycle management
  • Transactional state stores
  • Idempotent API and workflow design
• In-depth understanding of:
  • Exactly-once or effectively once processing
  • Failure modes in distributed environments
• Proficiency in one or more contemporary languages (e.g., Java, Kotlin, Go, Python)
• Experience with AI-assisted development tools for productivity and code quality

• Experience with outbox, transactional messaging, or event sourcing patterns
• Familiarity with low-latency, high-throughput architectures
• Operational experience in systems requiring strict auditability and correctness
• Background in regulated or mission-critical domains

• State transitions are precise, deterministic, and resilient to retries
• Side effects reliably occur exactly…