Bhuvaneshkumar Mahalingam

Senior Quality Assurance & Data Migration Professional with over 10 years of experience spanning ETL/ELT Testing, Cloud Data Migration, Data Engineering, Data Quality, and QA Governance across Banking & Financial Services. Expertise in Oracle-to-Snowflake/GCP migrations, BigQuery, DBT, Python-based validation, data reconciliation, & pipeline testing, ensuring end-to-end data integrity. Proven track record in QA automation and validation optimization, reducing manual QA effort by 70%+ through reusable Python utilities and automated data quality workflows.

Skilled in Cloud Data Engineering, including data pipeline development, CI/CD workflows, job scheduling, CDC validation, & automated QA orchestration using Airflow/Cloud Composer. Experienced in team leadership, stakeholder management, dashboard/API/UI validation, test governance, and Agile delivery, driving quality outcomes across complex enterprise data transformation initiatives.

Contractor at Trigent (2026-06 – Present)

• Leading a team of 8 members, overseeing ELT/ETL testing, cloud data migration, data engineering, and data validation activities across enterprise data platforms.
• Managing Oracle-to-Snowflake & Oracle-to-GCP data migration initiatives, ensuring data integrity, reconciliation, transformation accuracy, & end-to-end validation.
• Supporting Talent Acquisition data and analytics initiatives, validating dashboards, reports, APIs, HRIS integrations, events, and UI workflows associated with migration from Greenhouse to the new Ashby platforms.
• Contributing to data engineering & CI/CD initiatives, including data pipeline creation, job scheduling, and deployment workflows using CircleCI, Git, & GitHub.
• Performing ELT/ETL, API, UI, dashboard, and integration testing, collaborating with cross-functional stakeholders to identify discrepancies and ensure production readiness.
• Driving quality assurance and delivery governance while coordinating team activities, stakeholder requirements, defect resolution, & timely project execution.
• Define & maintain reusable data validation rules & quality checkpoints, standardizing QA practices across cloud migration & enterprise data transformation programs.
• Build executive-ready QA and migration dashboards tracking defect trends, reconciliation status, data quality exceptions, test progress, & release readiness across workstreams.
• Drive risk-based testing & quality gates across migration releases, prioritizing critical data flows & proactively identifying quality risks before production deployment.

Senior Associate at Cognizant Technology Solutions (2023-03 – 2026-06)

• Automated Oracle-to-Snowflake/GCP data validation using Python, covering schema comparison, data profiling, record counts, and anomaly detection.
• Developed Python-based ETL utilities for data extraction, transformation, and loading across Oracle, GCS, and BigQuery environments.
• Integrated automated validation scripts with Cloud Composer/Airflow DAGs, enabling scheduled and metadata-driven data quality checks.
• Implemented CDC and incremental load validation, with automated reporting, logging, exception handling, and stakeholder alerts.
• Reduced manual QA effort by 70%+ through reusable Python automation modules, enhancing migration accuracy and accelerating cloud data validation.

Consultant Quality Analyst at Mastech InfoTrellis (2022-06 – 2023-01)

• Led User Story grooming, test planning, script reviews, and TDM requests, ensuring comprehensive QA readiness.
• Oversaw Oracle-to-GCP data migration validation, verifying counts, staging, formats, file types, and target data accuracy.
• Validated ETL workflows and transformation logic, reconciling source-to-target records and ensuring accurate data movement.
• Collaborated with developers, business stakeholders, and QA teams to strengthen requirements, testability, and solution quality.
• Managed project team streams and delivery activities, ensuring timely execution of client engagements and quality outcomes.

Senior Test Engineer at Maveric Systems (2020-02 – 2022-06)

• Executed SIT, UAT, sanity, regression, and end-to-end testing across sprint-based Agile delivery cycles.
• Validated Ab Initio GDE graph reports and data processing outcomes to ensure functional and data accuracy.
• Translated business and system requirements into comprehensive test scenarios, test cases, and data requirements.
• Managed defect identification, analysis, and tracking through HP ALM and Jira, supporting timely resolution and closure.
• Collaborated with product managers, developers, device manufacturers, and stakeholders to enhance testing coverage and product quality.

QA Engineer at Infosys (2016-02 – 2020-02)

• Performed RPA QA testing for Blue Prism implementations, validating business processes and automation workflows.
• Developed functional test plans and test cases covering regression, functional, usability, and system testing.
• Analyzed requirements and adapted test scenarios/scripts to accommodate change requests and evolving business needs.
• Investigated defects, performed root-cause analysis, and managed defect lifecycle through ALM for timely resolution.
• Supported Agile delivery ceremonies, client communications, status reporting, and cross-functional coordination throughout project lifecycles.

M.Sc. in Computer Science – Pollachi NGM College (2017)

B.Sc. in Computer Science – Pollachi NGM College (2014)