Software Engineer in Test III

Own quality end-to-end for an assigned product squad: from test strategy through release confidence

Partner with developers and product managers at the design stage to define acceptance criteria and build testability into features from the start

Design, develop, and maintain Playwright-based automated tests following Page Object Model (POM) patterns and the team's established automation architecture

Write and maintain automation in TypeScript/JavaScript, contributing to shared frameworks and raising coverage standards across the team

Collaborate with engineers on system design, API contracts, and application architecture to ensure observable, testable behavior

Own your squad's test reliability—identify, analyze, and eliminate flakiness with the same urgency as a production bug

Integrate tests into CI/CD pipelines using tagging strategies (e.g., smoke, regression) so every deployment ships with clear quality gates

Apply AI-assisted development tools—code generation, test generation, failure analysis—to improve coverage and productivity

Perform manual and exploratory testing where it adds signal that automation cannot, and convert findings into durable automated coverage

Contribute to junior QA team members' growth through code reviews, pairing, and direct feedback

Uphold NinjaTrader SDLC and information security standards

What you'll need:

5+ years of experience in QA engineering and test automation

Strong hands-on experience with Playwright

Solid experience writing automation in TypeScript or JavaScript

Experience building and maintaining tests using Page Object Model or modular test architecture

Demonstrated experience working with engineers on testability-by-design—shaping application architecture and API design to support reliable automation

Experience integrating automated tests into CI/CD pipelines

Strong understanding of test design principles and the software testing life cycle

Proven proficiency with AI-assisted engineering tools (e.g., code generation, test generation, debugging assistants) applied responsibly in a production QA context

Ability to own quality for a product area independently, with minimal oversight

Strong communication skills—comfortable as a peer to engineers and product managers

Bonus points for:

Experience testing real-time or data-intensive web applications

API automation testing experience

Accessibility testing knowledge (WCAG standards)

Experience in trading platforms or fintech

Compensation:

The salary range for this role will be $82,000.00 - $132,000.00 USD. In addition, this position will also receive an annual target bonus of 10%. 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. We are not open to remote candidates for this role

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.