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Kevin El Hajj

@kevinelhajj

Senior Data Engineer at TotalCare, built a centralized healthcare data warehouse and contributes to conversational analytics.

Lebanon

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At TotalCare, I designed and developed a centralized healthcare data warehouse from scratch, bringing claims, payments, billing, and operational data into a unified analytical platform. I also architected Python, SQL, and Apache Airflow pipelines and designed dimensional models for healthcare and financial analytics.

At Constellation Consulting Group, I delivered data engineering and analytics solutions, including incremental processing improvements that reduced processing time by up to 80% for targeted workloads. At InMobiles Holding S.A.L, my data modeling and optimization work improved reporting performance by approximately 40%.

I'm currently contributing to an AI-powered analytics chatbot at TotalCare, intended to let authorized business users query enterprise data in natural language with attention to PHI protection and HIPAA requirements. I also review junior engineers’ code and contribute to architecture discussions and engineering practices.

Experience

Work history, roles, and key accomplishments

Current

Senior Data Engineer

Current

TotalCare

Nov 2025 - Present (1 year)

Designed and developed a centralized enterprise data warehouse from scratch, consolidating healthcare, billing, claims, payment, and operational data. Architected scalable ETL/ELT pipelines using Python, SQL, and Apache Airflow, and contributed to an AI-powered data analytics chatbot.

Python SQL Airflow Data Warehouse ETL ELT Dimensional Modeling Data Governance AI Natural Language Processing HIPAA

Senior Data Engineer

SABIS

Mar 2025 - Oct 2025 (7 months)

Designed, developed, and maintained enterprise ETL/ELT pipelines using Apache Airflow, Microsoft Fabric, and Azure Data Factory. Developed optimized SQL-based analytical datasets and implemented automated data validation and monitoring.

Airflow Microsoft Fabric Azure Data Factory SQL ETL ELT Data Validation Monitoring Python

Senior Data Engineer

Constellation Consulting Group

Feb 2023 - Feb 2025 (2 years)

Delivered end-to-end data engineering, data warehousing, and analytics solutions for enterprise and government-related initiatives. Implemented incremental loading and optimization strategies, reducing processing time by up to 80% for high-volume workloads.

Microsoft Fabric SQL Python Power BI Data Warehouse Dimensional Modeling Data Governance Data Quality Incremental Loading

Data Engineer

InMobiles Holding S.A.L

Mar 2021 - Jan 2023 (1 year 10 months)

Designed and implemented ETL pipelines using SSIS, ODI, and SQL. Developed dimensional data models and materialized views, improving reporting performance by approximately 40%.

SSIS ODI SQL ETL Dimensional Modeling Data Quality Query Optimization

Backend Developer

TenTime

Sep 2018 - Feb 2021 (2 years 5 months)

Developed and maintained scalable RESTful APIs and backend services supporting over 50,000 concurrent users. Integrated Elasticsearch for improved search functionality and implemented logging and monitoring.