Sr. Software Engineer I, Evaluation Services (Scala)

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;">We are seeking a Sr. Software Engineer to join our Evaluation Services team. Our Evaluation Services business powers funded trader programs that give aspiring traders a pathway to professional trading capital. In this role, you will design, build, and maintain the Scala-based backend systems that power our auto-liquidation engine, risk evaluation, and trading services—the core systems our platform and our partners depend on. You will own complex backend problems end-to-end and work alongside Trading Services Engineers, frontend engineers, QA, and solutions engineers to deliver high-quality, production-ready features in a fast-paced environment.</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 and implement backend services in Scala for evaluation, risk, and trading services workloads—including real-time auto-liquidation, account state management, and post-trade processing</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Build and evolve actor-based systems (Akka or similar) that handle high-throughput market data, position changes, and event-driven workflows</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Own significant features end-to-end: from technical spec through implementation, code review, and production hand-off</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Design data models and database changes (PostgreSQL, including JSONB where appropriate), and contribute to the shared master schema, Protobuf, and SQL repositories</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Diagnose and resolve complex backend issues—including production incidents—by analyzing logs, tracing distributed flows, and reproducing edge cases under realistic load</span></li> <li><span style="font-family: verdana, geneva, sans-serif; font-size: 12pt;">Drive code quality across the team: thorough PR reviews, clear acceptance criteria, dev-testing discipline, and proper instrumentation and observability</span></l