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Khawaja Hammad

@khawajahammad

Senior Data Engineer who built scalable data pipelines and dimensional models at Dubizzle labs and ALDI DX.

At ALDI DX, I developed Python and FastAPI backend services, built semantic search and RAG pipelines, and implemented a medallion data layer with Databricks and Azure Data Factory.

At Dubizzle labs, I developed data layers for OLX PK and dubizzle EG/LB, automated IFRS reporting for OLX PK, and led dimensional modeling for the MENAP Data Warehouse. I also improved ad upload speed 10x at Kavtech Solutions by migrating from the Google AdWords API to the Google Ads API.

Experience

Work history, roles, and key accomplishments

AI Data Engineer

ALDI DX

Dec 2024 - Jul 2026 (1 year 7 months)

Developed and maintained backend services using FastAPI and Python with integrated Swagger documentation. Designed and deployed fault-tolerant AWS solutions and built RAG pipelines using LangChain and pgvector.

fastAPI Python Swagger AWS Lang Chain Pgvector RAG Databricks Azure Data Factory LLM Testing

Senior Data Engineer - L2

Yotascale

Sep 2023 - Nov 2024 (1 year 2 months)

Leveraged Python, Pandas, PySpark, and Apache Spark on AWS EMR for scalable data transformation. Built and orchestrated Kubeflow MLOps pipelines and deployed Docker images to AWS ECR via Bitbucket CI/CD.

Python Pandas PySpark Apache Spark Amazon EMR Kubeflow Docker AWS ECR Bitbucket CI CD Datadog Prophet RMSE MSE

Senior Data Engineer

Dubizzle Labs

Dec 2021 - Aug 2023 (1 year 8 months)

Developed Application (Gold) and Operational (Silver) data layers in the data warehouse for OLX PK and dubizzle EG/LB. Integrated fact revenue with CRM, improving MENAP reporting accuracy by 90%+ and automated IFRS reporting.

Data Warehouse Dimensional Modeling CRM Periscope S3 OpenSearch Matillion Google Analytics BI Reporting

Data Engineer

Kavtech Solutions

Apr 2021 - Nov 2021 (7 months)

Led migration from Google AdWords API to Google Ads API, boosting ad upload speed 10x and reducing server costs. Optimized data workflows using SQL and Pentaho and documented code for team onboarding.

Google Ads APIs SQL Pentaho Performance Optimization Documentation Training