Available for Data Engineering roles in Ireland

Hi, I'm Mohan

Azure Data Engineer | Power BI Analyst | AI for Business

Microsoft certified data professional with 3+ years of Cognizant experience. I build cloud data pipelines, analytics dashboards, semantic models, RPA automations and AI-enabled data products using Azure, Microsoft Fabric, Databricks, SQL, Python, Power BI and Supabase.

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3+Years experience

82K+CORDIS records processed

50+SQL workloads migrated

Azure

Fabric

Power BI

Python

SQL

Spark

About

Data Engineering With Business Impact

Focused on reliable, analytics-ready data products across cloud, BI, automation and AI use cases.

Profile

Based in Dublin, Ireland. MSc in Artificial Intelligence for Business at National College of Ireland. Prior Cognizant experience supporting healthcare and finance clients including Optum Finance and CareSource.

My recent focus is Microsoft Fabric, CORDIS open data engineering, Power BI semantic modelling, portable ETL, Supabase/Next.js web apps and UiPath process automation.

Core Skills

Azure Data FactoryAzure DatabricksMicrosoft FabricLakehousePySparkSQL ServerPower BIDAXSSISSSRSPythonUiPathSupabaseNext.jsData ModellingETL/ELT

Experience

Professional Journey

Enterprise data engineering, BI reporting, migration and data validation experience.

Optum Finance / UnitedHealth Group

Azure Data Engineer / Associate Engineer @ Cognizant | Jul 2024 - Dec 2024

Built Azure Databricks pipelines using Apache Spark, PySpark, Spark SQL, Azure SQL and Databricks Jobs to ingest, transform and validate finance datasets for 5+ business units.
Migrated 50+ SQL scripts into configuration-driven Databricks notebooks while preserving joins, filters, reconciliation rules and report output structures.
Designed PySpark transformations for joins, aggregations, deduplication, schema alignment, NULL handling, audit columns and automated row-count checks across 20+ datasets.
Improved pipeline performance by 25% through Spark SQL refactoring, partition-aware transformations and notebook parameterisation.
Built Power BI dashboards and DAX measures on curated finance datasets, helping stakeholders monitor 10+ KPIs and reduce manual Excel reporting by about 30%.

CareSource BI Reporting 2.0

Cloud Migration Engineer / Associate Engineer @ Cognizant | Oct 2023 - Jun 2024

Delivered a cloud migration POC from on-premises SSIS/SSRS to Azure Databricks and Power BI, improving report performance by 30% and supporting client sign-off.
Re-engineered legacy SSIS ETL logic into modular Databricks SQL and PySpark ELT pipelines with parameterised notebooks and reusable transformations.
Reconciled 10M+ records between SQL Server, SSIS outputs and Databricks datasets using row counts, aggregate comparisons, exception reports and source-to-target rules.
Rebuilt 10+ SSIS/SSRS workflows as cloud-native Databricks pipelines while maintaining HIPAA-aware data handling and reporting validation discipline.

CareSource Reporting

Programmer Analyst - Data Engineering & BI @ Cognizant | Nov 2021 - Sep 2023

Developed 200+ T-SQL stored procedures, views, functions, indexed views, triggers and constraints for healthcare finance, claims, provider and member reporting.
Built and supported 120+ SSIS workloads integrating SQL Server, flat files, Excel, ODBC and OLE DB sources into reporting-ready datasets.
Designed 30+ SSRS paginated reports with drill-down views, matrix layouts, grouped tablix regions and parameterised filters.
Improved average query performance by 20% through indexing, execution-plan review, join optimisation and stored procedure refactoring.
Supported 200+ report and ETL releases across DEV, INT, CRT, UAT, EUAT, PRE-PROD and PROD environments.

Portfolio