Role Overview
The Senior Data Migration Engineer serves as a hands-on technical contributor and delivery anchor, responsible for designing and implementing Python-based extract/load pipelines, dbt-based transformations, and Airflow-based orchestration for a large-scale migration from Informatica PowerCenter to a modern data stack.
Key Responsibilities
- Assess complex Informatica workflows including sessions, mappings, and parameterizations and translate them into equivalent Python EL scripts and dbt transformation models.
- Develop and maintain Python EL pipelines to land high-volume data, including billion-row tables, into the target warehouse using SQLAlchemy, cx_Oracle, pyodbc, and bulk export tools such as Oracle Data Pump and SQL Server BCP.
- Design and develop dbt transformation models based on Informatica mapping logic, incorporating dbt best practices including model layering, macros, incremental strategies, and snapshot patterns.
- Develop dbt-native tests as well as custom Python unit tests to validate transformation correctness and data quality.
- Develop Airflow DAGs to orchestrate Python EL and dbt scripts end-to-end, producing output that is functionally equivalent to the source Informatica workflows.
- Contribute to GitLab CI/CD pipeline for dbt and Airflow code, including lint gates, automated testing, and deployment to shared NAS.
- Perform peer code reviews and provide constructive technical feedback to fellow engineers.
- Troubleshoot performance issues and data discrepancies during SIT and UAT, including row-count reconciliation between source Oracle/SQL Server systems and the target warehouse.
- Contribute to technical documentation, runbooks, and handover materials.
Required Skills & Experience
- 5+ years of Oracle DBA Experience - Experience creating schema, synonyms, db links, and backup/restore. Deep understanding of performance tuning when running queries across db links
- 3+ years of hands-on dbt Core experience - model layering, macros, tests, incremental materializations
- Any number of years of Informatica PowerCenter experience - mappings, sessions, workflows, and parameterization
- Any number of years of Airflow experience - DAG authoring, task dependencies, and incorporation with scheduling tool
- 5+ years of Python experience, including production use of parallelism and batch data processing
- 5+ years of SQL experience - complex joins, window functions, aggregations across large datasets
- Experience with Oracle Data Pump (expdp/impdp) or SQL Server BCP / BULK INSERT for high-volume data movement
Preferred
- Experience with SQLAlchemy, cx Oracle, or pyodbc for Python-based database connectivity
- Experience mentoring junior and mid-level engineers in offshore delivery models
About NTT DATA
NTT DATA is a $30 billion trusted global innovator of business and technology services. We serve 75% of the Fortune Global 100 and are committed to helping clients innovate, optimize and transform for long term success. As a Global Top Employer, we have diverse experts in more than 50 countries and a robust partner ecosystem of established and start-up companies. Our services include business and technology consulting, data and artificial intelligence, industry solutions, as well as the development, implementation and management of applications, infrastructure and connectivity. We are one of the leading providers of digital and AI infrastructure in the world. NTT DATA is a part of NTT Group, which invests over $3.6 billion each year in R&D to help organizations and society move confidently and sustainably into the digital future.