Sr. Software Engineer II, Platform/API

About this role

<div class="content-intro"><hr> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);"><span data-contrast="auto"><em><span style="color: rgb(255, 66, 0);"><strong>Disclaimer:</strong> </span>Please be advised that the most accurate and up-to-date information about our open roles—including job descriptions, compensation, and benefits—can only be guaranteed on our official job board. For the latest listings and details, please visit: <a href="https://job-boards.greenhouse.io/ninjatrader">https://job-boards.greenhouse.io/ninjatrader</a>.</em></span></span></p> <hr> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);"><span data-contrast="auto"><strong>JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLD</strong></span></span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;"><span data-contrast="auto">Welcome to the dynamic world of NinjaTrader! As an industry-leading trading platform and futures broker, we're 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 world's leading financial markets with confidence.&nbsp;</span><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}">&nbsp;</span></span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;"><span data-contrast="auto">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.</span>&nbsp;</span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;"><span data-contrast="auto">But we're not stopping there. We're 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.&nbsp;</span><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}">&nbsp;</span></span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;"><span data-contrast="auto">So, why work at NinjaTrader? Here, you're not just part of a team; you're 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 true?&nbsp;</span><a href="https://www.greatplacetowork.com/certified-company/7025362"><span data-contrast="none"><span data-ccp-charstyle="Hyperlink">Take it from our employees.</span></span></a><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}">&nbsp;</span></span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;"><span data-contrast="auto">Join us as we redefine what's possible in trading, advocate for our customers, and continue our journey toward becoming the world's top retail-focused trading platform in the world. </span><span data-ccp-props="{"201341983":0,"335559739":160,"335559740":259}">&nbsp;</span></span></p></div><p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt; color: rgb(255, 66, 0);"><strong>What you'll do:</strong></span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">NinjaTrader is investing in the platform that takes a prospective trader from initial sign-up to funded and trading, on a modern Node.js and TypeScript service architecture. We're hiring a Sr. Software Engineer II to own the service layer it runs on.</span></p> <p><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">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 &amp; Onboarding squad, your work will significantly impact account approvals, time-to-funding, and how quickly we can open the platform to new markets.</span></p> <p><strong><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">In this role you will:</span></strong></p> <ul> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Design, develop, and maintain Node.js and TypeScript services that orchestrate account creation, identity verification, agreement handling, and funding hand-off</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">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</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Own correctness in long-running, multi-step flows: idempotency, retry and resumption semantics, deduplication, and reconciliation for steps that cannot simply be replayed</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Design and evolve the background task runners and job orchestration that drive downstream account creation and decisioning</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Build the operational tooling the squad needs when an application stalls mid-flow: inspection of in-flight state, targeted replay, and safe requeue</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Define service-level expectations for th