Sr. Software Engineer II, PlatformAPI

Disclaimer: Please be advised that the most accurate and up-to-date information about our open rolesincluding job descriptions compensation and benefitscan only be guaranteed on our official job board. For the latest listings and details please visit: US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLD

Welcome to the dynamic world of NinjaTrader! As an industry-leading trading platform and futures broker were empowering traders to take control of their financial destiny. How do we do it We provide cutting-edge products and services that enhance the trading journey. Whether a seasoned pro or just starting out NinjaTrader equips traders with award-winning software and brokerage services to navigate the worlds leading financial markets with confidence.

Our growth story is nothing short of exhilarating. Since 2003 NinjaTrader has been dedicated to understanding and supporting traders on their journey toward trading triumph. Through those efforts our user base has grown to over 2 million users and we have become the number one rated futures brokerage worldwide.

But were not stopping there. Were constantly evolving pushing boundaries and modernizing the futures industry. Our commitment to innovation means users will always have access to dynamic tools real-time support and a community of like-minded traders.

So why work at NinjaTrader Here youre not just part of a team; youre part of a movement. We empower employees to reach new heights in their careers by providing a dynamic culture focused on social connection professional development and employee recognition initiatives. Sounds too good to be trueTake it from our employees.

Join us as we redefine whats possible in trading advocate for our customers and continue our journey toward becoming the worlds top retail-focused trading platform in the world.

What youll do:

NinjaTrader is investing in the platform that takes a prospective trader from initial sign-up to funded and trading on a modern and TypeScript service architecture. Were hiring a Sr. Software Engineer II to own the service layer it runs on.

Youll 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.

In this role you will:

• Design develop and maintain 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

What youll need:

• 6 years of professional software development experience building and operating backend services in production
• Bachelors or Masters degree in Computer Science Software Engineering or a related field (or equivalent practical experience)
• Deep 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

Bonus Points for:

• 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
• This is one of two backend openings on the Activation & Onboarding squad. If both look like a fit apply to whichever is closer to your strengths. We review candidates for both together.

Compensation:

The salary range for this role will be $140000.00 - $190000.00 addition this position will also receive an annual target bonus of 12%. Bonus pay at NinjaTrader is based on individual performance (50%) as well as company/team performance (50%).

Salary and bonus earnings are only two components of the total compensation package offered by NinjaTrader. NinjaTrader offers a 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) plus seven paid holidays.

Location:

This role is based in Chicago IL. *There may be remote flexibility for exceptional candidates in the following states: California Colorado Florida Georgia Illinois Indiana Minnesota Missouri Montana New Jersey New York North Carolina Ohio Oregon Pennsylvania South Carolina Texas Utah Vermont Virginia Washington Washington DC Wisconsin.

Hybrid:

For Chicago-based employees we follow a hybrid work schedule: In-office Tuesday through Thursday with remote work on Mondays and addition to these weekly remote days we offer:

• 20 additional flex remote days annually
• 5 Company Wide Office-Optional weeks tied to major holidays

Our Core Benefits Include:

• 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

We are committed to equal employment opportunity regardless of race color ancestry religion sex national origin sexual orientation age citizenship marital status disability gender gender identity or expression or veteran status. We are proud to be an equal opportunity workplace.