Data Engineering & ETL/ELT
Design, build, tune, and modernize reliable pipelines—from flat-file ingestion and CDC to warehouse transformations and orchestration.
DATA ENGINEERING • SQL • AUTOMATION
Build faster data systems. Automate repetitive work. Make your data useful.
Senior-level consulting for data engineering, ETL/ELT, SQL performance optimization, data migration and modernization, data warehousing and modeling, end-to-end automation, cloud cost optimization, and reporting automation.
10+ years Data & SQL Experience
7+ years ETL Engineering
Enterprise Migrations & Modernization
FROM BOTTLENECK TO BUSINESS VALUE
Practical engineering for real data problems.
Whether the issue is a slow SQL workload, fragile ETL process, manual spreadsheet routine, legacy migration, or reporting pipeline that needs to be automated, I focus on solutions that are maintainable, measurable, and built around the way your business actually works.
SERVICES
Consulting where data meets execution.
Available for focused projects, modernization initiatives, troubleshooting, and fractional engineering support.
SQL Query Tuning & Optimization
Deep SQL performance work focused on slow queries, stored procedures, inefficient transformations, dynamic SQL, incremental processing, and warehouse cost/runtime reduction.
Data Migration & Modernization
Plan and execute database and ETL migrations while preserving data integrity, reducing operational risk, and improving the target architecture.
End-to-End Automation & Scripting
Replace repetitive manual work with maintainable automation for file handling, scheduling, data extraction, validation, alerts, and operational workflows.
Reporting & Excel Automation
Automate recurring reports and spreadsheet-heavy processes, build reporting datasets, and deliver business intelligence through Power BI, SSRS, and Excel macros.
Data Modeling & Warehousing
Design analytical models and warehouse structures using dimensional modeling and modern data architecture patterns, with attention to performance, history, quality, and maintainability.
SELECTED IMPACT
Engineering tied to measurable outcomes.
Examples from enterprise data engineering and modernization work.
MIGRATION
Oracle to Snowflake & ETL platform modernization
Led migrations spanning Oracle to Snowflake, Informatica to Matillion, and Matillion processing to native Snowflake Tasks and Procedures.
AUTOMATION
Configuration-driven data onboarding
Engineered a dynamic load framework that automatically onboards new tables and columns through configuration rather than recurring manual code changes.
REPORTING
From manual processes to repeatable delivery
Built Power BI/SSRS reporting solutions and automated recurring report workflows, including weekly Excel processes using macros.
TECHNICAL EXPERTISE
Broad enough for the stack. Deep where performance matters.
Hands-on experience across relational databases, cloud data platforms, ETL tools, scripting, reporting, orchestration, and data architecture.
Databases & Platforms
Snowflake, Oracle, Microsoft SQL Server, PostgreSQL
ETL / Transformation
Informatica PowerCenter & IICS, Azure Data Factory, Matillion, DBT, Snowflake Tasks & Procedures
Scripting & SQL
Python, SQL, T-SQL, PL/SQL, PowerShell, Bash/Korn Shell, Batch
Data Modeling & Warehousing
Dimensional modeling using Kimball principles; fact and dimension tables; star and snowflake schemas; SCD Type 1 & Type 2 patterns; Data Vault 2.0; Medallion architecture; CDC and incremental loading
Reporting & Business Automation
Power BI, Microsoft SSRS Report Builder, Excel macros, ad-hoc extracts and repeatable reporting workflows
Engineering Practices
Git, Bitbucket, CI/CD, data quality, testing, lineage, governance, alerting, documentation
ABOUT
Senior data engineering experience without requiring another full-time hire.
I'm Mir Atah Ali, a Senior Data Engineer, ETL Architect, and Data Architect with more than a decade of experience in SQL development, data engineering, and data architecture.
My work spans enterprise pipeline development, performance tuning, database and ETL migrations, data warehousing, reporting, and automation. I specialize in taking data processes that are slow, manual, expensive, or difficult to maintain and engineering a cleaner path forward.
Engagements can range from a targeted SQL or automation problem to larger migration and data-platform initiatives.
START A CONVERSATION
Have a data bottleneck, migration, or repetitive process?
Tell me what you're trying to improve. We can discuss whether a focused consulting engagement makes sense.