Company Description
Guardant Health is a leading precision oncology company focused on helping conquer cancer globally through use of its proprietary tests, vast data sets and advanced analytics. The Guardant Health oncology platform leverages capabilities to drive commercial adoption, improve patient clinical outcomes and lower healthcare costs across all stages of the cancer care continuum. Guardant Health has commercially launched Guardant360, Guardant360 CDx, Guardant360 TissueNext, Guardant360 Response, and GuardantOMNI tests for advanced stage cancer patients, and Guardant Reveal for early-stage cancer patients. The Guardant Health screening portfolio, including the Shield test, aims to address the needs of individuals eligible for cancer screening.
Job Description
We are looking for a highly skilled Senior Software Engineer in Test with strong expertise in SQL,
Data Analysis, and Cloud platforms. The role focuses on validating data engineering pipelines,
ensuring data accuracy, and delivering high-quality analytics solutions. The ideal candidate should
have a strong analytical data mindset and experience working with modern data platforms.
Essential Duties and Responsibilities:
Must Have
- Design and execute test strategies for data pipelines and analytics systems
- Perform end-to-end data validation including source-to-target reconciliation
- Write complex SQL queries (CTEs, joins, aggregations, window functions) for validating transformations
- Validate business logic and ensure data accuracy across layers
- Validate Tableau dashboards including KPIs, filters, calculated fields, and data consistency
- Collaborate with data engineers, product managers, and stakeholders
- Build automation scripts using Python for data validation and regression
- Collaborate with data engineering teams to validate data platform functionality
- Experience working with CI/CD pipelines (e.g., Jenkins, GitHub Actions) and automation frameworks
Highly Desired
- Lead test planning, test case design, and execution for data systems
- Work closely with cross-functional teams for requirement validation
- Participate in Agile ceremonies and drive QA best practices
Technology Stack
Primary Skills (Mandatory)
- Advanced SQL (CTEs, Joins, Aggregations, Window Functions)
- Data Analysis and Data Validation
- Cloud Platforms (AWS/Azure/GCP)
Secondary Skills
- Python for automation and data validation
- Data & Visualization
- Experience validating Tableau dashboards including KPIs, filters, and calculated fields
Big Data / Cloud Tools
- AWS ecosystem (S3, Athena, Glue, Airflow)
- Exposure to tools like Spark, Kafka is a plus
- Past Job Experience
- Experience in testing data platforms, ETL/ELT pipelines, and analytics systems
- Strong hands-on experience writing complex SQL queries beyond basic validation
- Experience working in Agile environments and collaborating across teams
Minimum Qualifications
- 5+ years of experience in QA/Data Testing roles
- Bachelor's degree in Computer Science or related field
- AI & Automation Mindset
- Working knowledge of AI tools such as ChatGPT, GitHub Copilot, Claude, Codex or similar tools
- Ability to leverage AI tools for generating SQL queries, test cases, and automation scripts
- Use AI tools to accelerate data validation, create test scenarios, and improve regression coverage
- Apply AI for root cause analysis, anomaly detection, and faster debugging of data issues
- Continuously explore AI-driven approaches to improve QA productivity and efficienc
Additional Information
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Please visit our career page at: http://www.guardanthealth.com/jobs/
