Senior Data Testing Engineer – Snowflake & AI Testing

Cognizant Technology Solutions; Boston (MA); Hybrid; USD 100,000 - 115,000; Full time

Benefits offered by this job

Hybrid work model

Health insurance

401(k) with company match

Paid time off and parental leave

Job summary

Cognizant Technology Solutions in Boston is seeking a Senior Data Testing Engineer to ensure quality of enterprise data platforms, pipelines, and AI-enabled solutions. You will design automated testing for Snowflake environments, validate ETL/ELT processes, and drive data quality across the stack.

Collaborate with Data Engineering, Analytics, and Product teams; contribute to CI/CD integration, performance validation, and AI testing practices such as Snowflake Cortex.

Qualifications

• Bachelor's degree or equivalent work experience.
• 7+ years in data QA/testing or data engineering with focus on validation.
• Deep Snowflake experience including architecture and performance.
• Advanced SQL and complex query development.
• Experience with ETL/ELT pipelines and data integration tools.
• CI/CD experience and automated testing design.
• Strong data warehousing and dimensional modeling knowledge.
• Agile teamwork and stakeholder communication.

Responsibilities

• Design, develop, and maintain automated testing frameworks for data platforms.
• Validate data transformations to ensure accuracy and integrity.
• Perform source-to-target data validation and end-to-end quality checks.
• Develop complex SQL queries to validate models and reports.
• Collaborate with Data Engineering, Analytics, Product, and Business teams.
• Integrate automated testing into CI/CD pipelines.
• Mentor junior QA/Data Testing Engineers.

Skills

Snowflake

SQL

Automated data testing

ETL/ELT testing

Data quality

CI/CD

Agile delivery

Data pipelines

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, Data Analytics, or related field

Tools

dbt

Fivetran

Job description

Senior Data Testing Engineer – Snowflake & AI Testing

About Cognizant Cognizant (NASDAQ: CTSH) is one of the world's leading professional services companies, helping clients modernize technology, reimagine processes, and transform experiences so they can stay ahead in a rapidly changing world. Our associates work with some of the world's most recognized organizations to deliver innovative solutions across digital engineering, cloud, data, AI, and business transformation. At Cognizant, we foster an inclusive, collaborative, and high‑performing culture where diverse perspectives drive innovation and create meaningful impact for our clients.

Job Summary

Cognizant is seeking an experienced Senior Data Testing Engineer to join our Data Engineering and Quality Assurance team. In this role, you will be responsible for ensuring the quality, integrity, reliability, and performance of enterprise data platforms, data pipelines, and AI‑powered solutions. The ideal candidate will possess deep expertise in Snowflake, advanced SQL, and automated data testing methodologies, along with experience validating complex ETL/ELT pipelines. This role requires a strong quality mindset, excellent analytical skills, and the ability to collaborate with cross‑functional teams to deliver high‑quality data products. Experience or familiarity with Snowflake Cortex AI and AI testing practices is highly desirable.

Key Responsibilities

• Design, develop, and maintain scalable automated testing frameworks for data platforms, data warehouses, data lakes, and ETL/ELT processes.
• Validate data transformations and business rules to ensure accuracy, completeness, consistency, and integrity across systems.
• Perform source‑to‑target data validation, reconciliation, and end‑to‑end data quality testing.
• Develop and execute complex SQL queries to validate data models, transformations, and reporting outputs.
• Conduct performance validation and testing to ensure efficient utilization of Snowflake resources and optimal platform performance.
• Collaborate with Data Engineering, Analytics, Product, and Business teams to define testing strategies and quality standards.
• Integrate automated testing solutions into CI/CD pipelines to support continuous testing and rapid deployment of data assets.
• Identify, document, prioritize, and track defects through resolution while driving root‑cause analysis and process improvements.
• Support testing and validation of AI‑driven data solutions, including applications leveraging Snowflake Cortex AI capabilities.
• Create and maintain test plans, test cases, automation assets, and quality metrics documentation.
• Mentor and guide junior QA and Data Testing Engineers on testing best practices, automation techniques, and Snowflake technologies.
• Contribute to continuous improvement initiatives focused on data quality, testing efficiency, and engineering excellence.

Required Qualifications

• Bachelor's degree in Computer Science, Information Technology, Engineering, Data Analytics, or a related field, or equivalent work experience.
• 7+ years of experience in Data Quality Assurance, Data Testing, or Data Engineering with a significant focus on testing and validation.
• Deep hands‑on experience with Snowflake, including architecture, data structures, performance optimization, and best practices.
• Advanced proficiency in SQL and experience developing complex queries for data validation and analysis.
• Strong experience testing complex ETL/ELT pipelines and modern data integration solutions.
• Experience working with tools and frameworks such as dbt, Fivetran, or similar data engineering technologies.
• Experience designing and implementing automated data testing frameworks.
• Strong understanding of data warehousing concepts, dimensional modeling, and data quality principles.
• Experience integrating automated testing into CI/CD environments.
• Excellent analytical, troubleshooting, and problem‑solving skills with strong attention to detail.
• Strong communication and stakeholder management skills with experience working in Agile delivery teams.

Preferred Qualifications

• Hands‑on experience or strong familiarity with Snowflake Cortex AI.
• Experience testing AI, machine learning, or generative AI‑enabled applications.
• Knowledge of cloud‑based data architectures and modern data platforms.
• Experience with data observability, monitoring, and quality management tools.
• Relevant Snowflake, cloud, or data engineering certifications.

Why Cognizant

• Work on enterprise‑scale data and analytics platforms
• Collaborate with global teams and industry‑leading clients
• Grow your career in a high‑impact, data‑driven environment
• Be part of a culture focused on innovation, inclusion, and excellence

Equal Opportunity Employer Statement

Cognizant is an equal opportunity employer. We are committed to fostering a workplace where all employees are valued, respected, and empowered to succeed. Employment decisions are made without regard to race, color, religion, sex, gender identity or expression, sexual orientation, national origin, disability, veteran status, or any other protected characteristic under applicable law. We are committed to providing reasonable accommodations for qualified individuals with disabilities during the application and employment process. Please contact us if you require accommodation or assistance.

Compensation

Base Salary Range: $100,000 – $115,000 per year Final compensation is based on experience, skills, and location Eligible for performance‑based bonuses and incentive compensation

Benefits

• Health & Wellness: Medical, dental, and vision insurance
• Financial Security: 401(k) with company match, life insurance, disability coverage
• Time Off: Generous PTO, paid holidays, and parental leave
• Learning & Development: Training programs, certifications, and career advancement opportunities
• Flexible Work Model: Hybrid work environment supporting work‑life balance
• Employee Programs: Wellness initiatives, employee resource groups, and recognition programs

What’s Next

Why Join Cognizant? Work on enterprise‑scale data and analytics platforms Collaborate with global teams and industry‑leading clients Grow your career in a high‑impact, data‑driven environment Be part of a culture focused on innovation, inclusion, and excellence About Cognizant: Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full‑stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast‑changing world. See how at cognizant.ai or @cognizant. Bachelor's degree in Computer Science, Information Technology, Engineering, Data Analytics, or a related field, or equivalent work experience., 7+ years of experience in Data Quality Assurance, Data Testing, or Data Engineering with a significant focus on testing and validation., Deep hands‑on experience with Snowflake, including architecture, data structures, performance optimization, and best practices., Advanced proficiency in SQL and experience developing complex queries for data validation and analysis., Strong experience testing complex ETL/ELT pipelines and modern data platforms., Experience working with tools and frameworks such as dbt, Fivetran, or similar data engineering technologies., Experience designing and implementing automated data testing frameworks., Strong understanding of data warehousing concepts, dimensional modeling, and data quality principles., Experience integrating automated testing into CI/CD environments., Excellent analytical, troubleshooting, and problem‑solving skills with strong attention to detail., Strong communication and stakeholder management skills with experience working in Agile delivery teams.