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NinjaTrader Verified 37h ago

Sr. Software Engineer II, Platform/API

Chicago, ILAll locationsChicago, ILNew York, NYChicago or Remote* Hybrid

$140,000–$190,000 a year
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Pay$140,000–$190,000
TypeNot specified
Work settingHybrid
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About the role

You'll own how those services are designed, deployed, and operated: event-driven orchestration, background processing, third-party integrations, and the reliability engineering that keeps a multi-step flow dependable at scale. As a senior engineer on the Activation & Onboarding squad, your work will significantly impact account approvals, time-to-funding, and how quickly we can open the platform to new markets.

What you'll bring

  • 6+ years of professional software development experience building and operating backend services in production
  • Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience)
  • Deep Node.js and TypeScript expertise, with strong command of asynchronous patterns, concurrency, and backpressure
  • Proven production experience with event-driven architecture, including delivery guarantees and poison-message handling, on message queues, pub/sub, or streaming platforms such as Kafka or Google Cloud Pub/Sub
  • Demonstrated experience building idempotent, resumable workflows that stay correct under retries, partial failure, and out-of-order delivery
  • Strong SQL and schema design, plus hands-on experience with Docker, Kubernetes, and a major cloud platform
  • Demonstrated use of AI coding agents (Codex, Cursor, Claude Code) as a standard part of your engineering workflow, with the judgment to review and validate AI-assisted code before it ships
  • Excellent communication and the ownership to run a workstream end to end: design, implement, test, deploy, operate on-call, and iterate
  • Experience with identity verification, KYC/AML, or fraud and risk decisioning systems
  • Experience in fintech, trading, or brokerage, particularly in a regulated financial services environment
  • Experience integrating third-party providers whose contracts and failure modes you do not control
  • Familiarity with workflow or saga orchestration frameworks, and with feature flagging platforms such as Statsig

Benefits

401(k)Disability InsurancePaid HolidaysPaid Time Off

Locations

Chicago, ILNew York, NYChicago or Remote*

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