Senior Test Engineer ensuring product quality through testing and evaluation practices in Agile teams. Mentoring junior engineers and supporting product quality aligned to user stories and acceptance criteria.
About the role
- Senior Software Test Engineer designing and maintaining Python-based test automation frameworks for NinjaTrader. Collaborating with developers to enhance services observability and testability.
Responsibilities
- Design, architect, and maintain a scalable, extensible Python-based test automation framework using PyTest
- Define automation strategy and quality gates for back-office services and workflows
- Write and maintain robust functional test suites for backend and service-layer applications
- Evaluate existing test coverage, identify systemic gaps, and implement additional functional and integration tests
- Develop integration tests across Python-based services, GCP Pub/Sub messaging systems, and Oracle databases
- Design test data management strategies for complex distributed workflows
- Implement mocks and stubs for middleware, databases, and third-party dependencies to enable isolated and deterministic testing
- Partner with developers to build automation-friendly services and improve system observability and testability
- Improve overall test reliability by identifying, debugging, and eliminating flaky tests
- Lead code reviews for automation and proactively drive improvements in test coverage, maintainability, and engineering standards
- Integrate automated test execution into CI/CD pipelines with single-click batch execution and automated reporting
- Define and implement build certification and deployment validation processes across environments
- Debug production issues using logs, database traces, and service telemetry to enhance test coverage and prevent regressions
- Contribute to performance, resilience, and fault-tolerance testing strategies for distributed systems
- Mentor QA engineers and developers on automation design principles, framework usage, and best practices
- Enforce adherence to NinjaTrader SDLC and information security standards
- Work ahead of feature delivery to ensure test architecture evolves alongside system complexity
Requirements
- 5+ years of experience in QA automation and software testing, with demonstrated senior-level ownership of automation initiatives
- Strong expertise in Python test automation frameworks such as PyTest (Robot Framework experience is a plus)
- Proven experience designing automation frameworks from the ground up
- Deep experience testing backend services, REST APIs, and distributed systems
- Hands-on experience validating event-driven architectures using messaging platforms such as GCP Pub/Sub
- Strong experience with relational databases (Oracle preferred), including data validation and complex query verification
- Solid understanding of system testing methodologies, SDLC/STLC, and automation best practices
- Experience designing and implementing integration testing strategies across asynchronous systems
- Proficiency with Linux command-line tools and log analysis
- Experience integrating automation into CI/CD tools such as Jenkins or GitHub Actions
- Familiarity with infrastructure-as-code tools such as Terraform or Ansible
- Experience testing cloud-native applications (GCP preferred)
- Exposure to performance, load, or resilience testing in distributed systems
- Financial trading systems experience is a plus
- Excellent communication, collaboration, and analytical problem-solving skills
- Demonstrated ability to mentor engineers and influence quality practices across teams
Benefits
- 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
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