Sr. Software Engineer II, Platform/API
NinjaTrader2 months ago
Base Salary
$140k - $190k/yr
Responsibilities
- Design, develop, and maintain Node.js and TypeScript backend services for account creation, identity verification, agreement handling, and funding hand-off.
- Build event-driven and asynchronous processing using message queues, pub/sub, and streaming pipelines.
- Implement idempotency, retries, resumability, deduplication, reconciliation, and correctness for long-running multi-step workflows.
- Design background task runners and job orchestration for downstream account creation and decisioning.
- Build operational tooling for inspecting in-flight state, targeted replay, and safe requeue of stalled applications.
- Define service-level expectations and implement monitoring and alerting for provider failures and applicant drop-off.
- Design and implement scalable, resilient service architecture using Google Cloud Platform and Kubernetes.
- Extend onboarding for new markets, brands, and account types through configurable jurisdiction-specific behavior.
- Coordinate technical direction with adjacent squads and coach Sr. Software Engineer I-level engineers through design reviews and pairing.
- Own workstreams through design, implementation, testing, deployment, on-call operation, and iteration.
Requirements
- 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, including asynchronous patterns, concurrency, and backpressure.
- Production experience with event-driven architecture, delivery guarantees, and poison-message handling using queues, pub/sub, or streaming platforms such as Kafka or Google Cloud Pub/Sub.
- Experience building idempotent and resumable workflows that remain correct under retries, partial failure, and out-of-order delivery.
- Strong SQL and schema-design skills plus hands-on experience with Docker, Kubernetes, and a major cloud platform.
- Demonstrated use of AI coding agents such as Codex, Cursor, and Claude Code, with the ability to review and validate assisted code.
- Excellent communication and end-to-end ownership.
- Preferred experience with identity verification, KYC/AML, fraud or risk decisioning, fintech, trading, brokerage, regulated financial services, third-party provider integrations, workflow or saga orchestration frameworks, and feature-flagging platforms such as Statsig.
- Passion for futures, derivatives, and trading technologies is preferred.
Benefits
- Salary range of $140,000.00–$190,000.00 USD plus an annual target bonus of 12%.
- 401(k) plan through ADP with up to a 3.5% company match.
- 18 days of annual paid time off accrual, plus seven paid holidays and other conditional holidays.
- Hybrid Chicago schedule with in-office work Tuesday through Thursday and remote work Monday and Friday.
- 20 additional flex remote days annually and five company-wide office-optional weeks tied to major holidays.
- Remote flexibility may be available for exceptional candidates in listed states.
- Generous PTO, one annual service day, paid parental bonding leave, health, vision, and dental coverage, and company-paid life and disability insurance.
Categories
About NinjaTrader
NinjaTrader builds a multi-device trading platform and runs a futures brokerage and clearing firm for active retail and professional traders. Its software offers advanced charting, strategy development, backtesting, and trade execution, and the brokerage earns commissions and fees. Founded in 2004 and headquartered in Chicago, it is part of Payward (Kraken).