Senior Backend Data Test Engineer

Job Title: IT - Test Engineer II

Location work will be performed: MDT200 - MD P0 - Teleworker
Job Description:

The Senior Backend Data Test Engineer will be responsible for validating large-scale data systems, ensuring data accuracy, integrity, and consistency across backend platforms and corresponding frontend/UI applications. This requires deep expertise in backend database testing, ETL verification, bigdata technologies, and data quality analysis within a CMS high-priority application. The engineer will work closely with Data Coaches/Analysts/DBA and Scrum/Kanban teams to ensure alignment with program standards, backend-frontend requirements, and Agile delivery expectations.

Primary Responsibilities
Perform comprehensive ETL and backend data validation across bigdata technologies including Databricks, Snowflake, PostgreSQL, and related platforms.
Analyze, interpret, and validate complex CMS datasets, including Shared Systems Claims, Final Action Indicator logic, Provider data, and Beneficiary data etc.
Validate data sourced from CMS s Integrated Data Repository (IDR) and OnePI (Program Integrity) tools as they relate to Fraud Prevention System (FPS) data workflows.
Conduct detailed data comparison and reconciliation between backend datasets (PostgreSQL/Snowflake) and corresponding Frontend/UI outputs and/or Databricks Unity Catalog results.
Collaborate with Business Analysts, DBAs, Developers, DevOps engineers, and Scrum/Kanban teams to ensure system reliability, data accuracy, and optimal performance.
Ensure adherence to CMS Testing Framework standards, organizational SDLC processes, quality procedures, and regulatory compliance requirements.
Participate in functional UI validations as needed to support endtoend data integrity across user-facing components.
Independently develop, execute, and maintain detailed backend test plans, test cases, and validation scenarios with zero or minimal supervision.
Design and execute APIbased test scenarios to validate backend services and data flows.
Actively participate in Agile ceremonies including Daily Standups, Sprint Planning, Backlog Refinement, PI Planning, Sprint Reviews/Demos, and Retrospectives.
Provide support, mentorship, and knowledge sharing to other backend and functional testing team members.
Required Qualifications (Must have)
Minimum of 5+ years of direct experience as a Backend/Data Tester.
Strong expertise in backend database testing using PostgreSQL, Snowflake, and advanced SQL.
Experience performing data validation within a bigdata environment (Databricks, Snowflake, etc.).
Proficiency with collaboration tools such as Jira, Confluence, and Slack.
Solid experience working within Agile or SAFe methodologies.
Handson experience writing user stories, defect tickets, and clear acceptance criteria.
Ability to create detailed test cases based on user stories and functional requirements.
Strong communication skills with the ability to collaborate effectively with Product Owners, DBAs, and Developers.
Proven ability to work independently, take initiative, and manage tasks with minimal direction.