Sr. Software Engineer II, Backend (Rust)

JobCubby; Chicago, Northern (IL, KY); Hybrid; USD 140,000 - 190,000; Full time

Benefits offered by this job

Generous PTO

Health insurance

401k with match

Parental leave

Holiday pay

Job summary

NinjaTrader is seeking a highly skilled Rust Engineer to design, implement, and maintain backend services that power account creation, identity verification, and KYC/CIP decisioning. You will build robust integrations with identity providers and ensure deterministic, testable behavior across distributed components.

The role emphasizes secure data handling, exposure of policy-driven configurations, and scalable cloud architecture on GCP with Kubernetes.

Qualifications

• 6+ years of professional software development experience.
• Strong production Rust: ownership, lifetimes, error modeling, async (tokio).
• Experience with HTTP and event-driven service integrations; backward compatibility.

Responsibilities

• Design, develop, and maintain Rust services powering account creation, identity verification, and KYC/CIP decisioning.
• Build integrations with identity, fraud, and screening providers; fixture-based scenarios for deterministic testing.
• Write the determination logic as pure, table-tested functions with a single authoritative rule definition.
• Design asynchronous delivery of outcomes to downstream systems with idempotency, retries, and completion gates.
• Own data handling for PII and identity documents with encryption, secret management, and audit logging.
• Policy-driven configuration to express market/product differences and enable jurisdiction support.
• Operate services with instrumentation, logging, alerts, and incident response.
• Design scalable, reliable cloud architecture using GCP and Kubernetes.
• Mentor engineers and lead Rust design reviews in onboarding domain.

Skills

Rust

Async Rust

HTTP/REST

Security

Testing

Kubernetes

Docker

CI/CD

Communication

Education

Bachelors or Masters in CS/SE

Tools

Docker

Kubernetes

sqlx

diesel

serde

Tokio

gRPC/Protobuf

Job description

JOIN 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, 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.

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:

• Design, develop, and maintain Rust services and crates that power account creation, identity verification, and KYC/CIP decisioning
• Build integrations with identity, fraud, and screening providers, including response modeling, deserialization, and fixture-based scenarios that make third-party behavior deterministically testable
• Write the determination logic as pure, table-tested functions, with one authoritative definition of each rule rather than the same rule reimplemented in three places
• Design 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 success
• Own 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 logging
• Express market and product differences as policy and configuration, so supporting a new jurisdiction is a policy change rather than a refactor
• Operate what you build: instrumentation, structured logging, alerting, and incident response for services where a silent failure quietly stops customers from funding
• Design and implement scalable, reliable service architecture, using cloud-based infrastructure such as Google Cloud Platform and Kubernetes
• Act 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 proficiency

What you'll need:

• 6+ years of professional software development experience, including substantial production Rust
• Strong 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 diesel
• Demonstrated ability to write highly testable Rust, including pure functions at decision boundaries, table-driven tests, fixture-based integration testing, and strict contract tests
• Proven experience designing HTTP and event-driven service integrations, including versioning and backward compatibility
• Experience handling sensitive data under real constraints (encryption, secret management, least-privilege access, and audit requirements) in containerized cloud environments such as Docker and Kubernetes
• 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, including driving technical contracts to agreement with teams outside your reporting line, and full ownership of what you ship
• Bachelor'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 systems
• Experience in fintech, trading, brokerage, or crypto, particularly in a regulated financial services environment
• Experience in a large Rust monorepo with shared crates, workspace tooling, and multi-team code ownership
• Familiarity with policy-driven flow engines (YAML or JSON defined workflows), schema-driven contracts such as gRPC or protobuf, and feature flagging platforms such as Statsig
• Passion for futures, crypto, derivatives and trading technologies is a strong plus

Compensation:

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 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.