Note: The job is a remote job and is open to candidates in USA. NinjaTrader is a retail trading platform and futures brokerage company. The Sr. Software Engineer II will own the backend service layer for activation and onboarding, designing and operating Node.js and TypeScript services, event-driven workflows, integrations, and resilient infrastructure. The role will also guide technical direction, expand onboarding capabilities, and coach other engineers.
Responsibilities
- Design, develop, and maintain Node.js and TypeScript services that orchestrate account creation, identity verification, agreement handling, and funding hand-off
- Build the event-driven and asynchronous processing that moves applicant and verification data between internal systems and outside providers, using message queues, pub/sub, and streaming pipelines
- Own correctness in long-running, multi-step flows: idempotency, retry and resumption semantics, deduplication, and reconciliation for steps that cannot simply be replayed
- Design and evolve the background task runners and job orchestration that drive downstream account creation and decisioning
- Build the operational tooling the squad needs when an application stalls mid-flow: inspection of in-flight state, targeted replay, and safe requeue
- Define service-level expectations for the flows you own, along with the monitoring and alerting that surface provider failures and applicant drop-off before a customer reports them
- Design and implement scalable, resilient service architecture, using cloud-based infrastructure such as Google Cloud Platform and Kubernetes
- Extend onboarding to new markets, brands, and account types, keeping jurisdiction-specific behavior configurable rather than forked
- Coordinate technical direction with engineers on adjacent squads whose systems consume your events, and coach engineers at the Sr. Software Engineer I level through design review and pairing
Skills
- 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
- Passion for futures, derivatives, and trading technologies is a strong plus
Benefits
- Annual target bonus of 12%
- 401K plan through ADP under which the company will match up to 3.5% of employee contributions
- Annual paid time off allowance accrues at a rate of 18 days per year (some positions may qualify for more)
- Seven paid holidays
- 20 additional flex remote days annually for Chicago-based employees
- 5 Company Wide Office-Optional weeks tied to major holidays
- Generous PTO
- 7 Paid Holidays Annually + 5 Conditional Holidays Annually
- 1 Service Day Annually
- 401k with 3.5% Company Match
- Paid Parental Bonding Leave
- Health, Vision, Dental Coverage
- Life and Disability Insurance Covered 100% by NinjaTrader
- For Chicago-based employees, we follow a hybrid work schedule: In-office Tuesday through Thursday, with remote work on Mondays and Fridays.
Company Overview
Company H1B Sponsorship