Sr Python Developer - AWS, Testing Experience - ZL

Python Developer - AWS, with QA Testing Experience

Location: Reston, VA or Washington, DC

Hybrid 3 days onsite

We are seeking a Python Developer - AWS, with QA Testing Experience for a contract position with strong expertise in testing, automation, and quantitative analysis to join the application team.

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Responsibilities:

This role involves designing and implementing automated test frameworks, validating complex models, generating test cases, performing functional and regression testing, and maintaining comprehensive documentation to ensure accuracy and reliability of analytical systems.

Technical Skills:

• Must have hands-on experience with AWS cloud services
• Python development experience
• Solid understanding of software testing methodologies combined with quantitative modeling principles.
• Automated Testing & Frameworks
  Design, develop, and maintain automated test scripts and frameworks for regression and performance testing of quantitative models and applications.
• Test Case Generation & Execution

Generate detailed test cases based on functional requirements, model specifications, and quantitative assumptions.

• Model Vetting & Validation. Perform rigorous testing of financial and analytical models, including sensitivity analysis, back-testing, and stress testing in AWS environments.
• Data Setup & Simulation
  Prepare datasets and execute model runs in AWS for validation and scenario analysis.
• Defect Resolution & Optimization
  Collaborate with development and modeling teams to identify, troubleshoot, and resolve defects in model logic and automation workflows.
• Documentation & Governance
  Document test plans, validation results, and maintain compliance with model governance standards.
• Continuous Improvement
  Enhance and optimize existing test automation processes, ensuring scalability and reproducibility.
• Cloud Integration
  Utilize AWS services (EC2, S3, Lambda) for deployment, testing environments, and automation pipelines.
• Quality Assurance
  Ensure code quality and testing rigor through best practices and continuous integration.
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Required Skills & Qualifications

Education:

• Bachelor s degree in computer science, Engineering, Applied Mathematics, or related discipline. Minimum 8 years of experience in software testing, automation, or quantitative engineering.
• Programming:
  Strong proficiency in Python for development and automation. Exposure to Java and R is desirable.
  Cloud Expertise:
  Hands-on experience with AWS services (EC2, S3, Lambda) and cloud-based testing environments.
• Testing Expertise:
  Ability to design and execute unit tests, integration tests, regression tests, and model validation tests.
  Experience in creating and managing test cases and documentation.
• Automation:
  Knowledge of test automation frameworks and tools (e.g., PyTest, Selenium, or similar). Familiarity with microservices and distributed systems is a plus.
• Quantitative Analysis:
  Understanding of statistical testing, model risk concepts, and performance metrics for analytical models.
• Version Control & CI/CD:
  Familiarity with Git and continuous integration/deployment pipelines.

Soft Skills:

• Strong analytical and problem-solving skills, excellent communication, and documentation abilities.