Sr. Software Engineer II, Backend (Rust)

Disclaimer: 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: .JOIN US ON OUR MISSION TO BECOME THE #1 RETAIL TRADING PLATFORM IN THE WORLDWelcome 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. 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 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. 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? Take it from our employees. 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. What you'll do:NinjaTrader's identity and verification platform is built in Rust, and it sits on the critical path for every new customer we bring on. We're hiring a Sr. Software Engineer II with deep Rust expertise to own that surface end to end: the provider/vendor integrations, the verification logic, and the asynchronous delivery of outcomes into the systems that act on them.You'll be NinjaTrader's Rust authority for the onboarding domain while working alongside Rust engineers across the wider Payward organization. As the senior-most Rust engineer on the Onboarding squad, your work will significantly impact approval rates, time-to-funding, and our ability to extend the platform into new markets.In this role you will:Design, develop, and maintain Rust services and crates that power account creation, identity verification, and KYC/CIP decisioningBuild integrations with identity, fraud, and screening providers, including response modeling, deserialization, and fixture-based scenarios that make third-party behavior deterministically testableWrite the determination logic as pure, table-tested functions, with one authoritative definition of each rule rather than the same rule reimplemented in three placesDesign asynchronous, task-based delivery of outcomes to downstream systems: idempotency keys, retry and resumption semantics, and completion gates that wait on a real receipt instead of assuming successOwn data-handling correctness for flows carrying PII and identity documents, covering redaction and minimal projections, encryption in transit and at rest, secret management, and audit loggingExpress market and product differences as policy and configuration, so supporting a new jurisdiction is a policy change rather than a refactorOperate what you build: instrumentation, structured logging, alerting, and incident response for services where a silent failure quietly stops customers from fundingDesign and implement scalable, reliable service architecture, using cloud-based infrastructure such as Google Cloud Platform and KubernetesAct as the onboarding domain's authority during cross-functional Rust design reviews, brokering technical contracts with external squads and mentoring internal engineers as they grow their Rust proficiencyWhat you'll need:6+ years of professional software development experience, including substantial production RustStrong command of Rust in production: ownership and lifetimes, error modeling, trait design, and the async ecosystem (tokio), plus serde and a SQL layer such as sqlx or dieselDemonstrated ability to write highly testable Rust, including pure functions at decision boundaries, table-driven tests, fixture-based integration testing, and strict contract testsProven experience designing and event-driven service integrations, including versioning and backward compatibilityExperience handling sensitive data under real constraints (encryption, secret management, least-privilege access, and audit requirements) in containerized cloud environments such as Docker and KubernetesDemonstrated 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 shipsExcellent communication, including driving technical contracts to agreement with teams outside your reporting line, and full ownership of what you shipBachelor's or Master's degree in Computer Science, Software Engineering, or a related field (or equivalent practical experience)Bonus Points for:Experience with identity verification, KYC/AML, CIP, or fraud and risk decisioning systemsExperience in fintech, trading, brokerage, or crypto, particularly in a regulated financial services environmentExperience in a large Rust monorepo with shared crates, workspace tooling, and multi-team code ownershipFamiliarity with policy-driven flow engines (YAML or JSON defined workflows), schema-driven contracts such as gRPC or protobuf, and feature flagging platforms such as StatsigPassion for futures, crypto, derivatives and trading technologies is a strong plusCompensation:The salary range for this role will be $140,000.00 - $190,000.00 USD. In 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 Fridays. In addition to these weekly remote days, we offer:20 additional flex remote days annually5 Company Wide Office-Optional weeks tied to major holidaysOur Core Benefits Include:Generous PTO7 Paid Holidays Annually + 5 Conditional Holidays Annually1 Service Day Annually401k with 3.5% Company MatchPaid Parental Bonding LeaveHealth, Vision, Dental CoverageLife and Disability Insurance Covered 100% by NinjaTraderWe 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.