Hi, I'mMohamedAbdelhalim

Koinz

2026 — Present · Cairo, Egypt

Maintain and scale core data infrastructure supporting company-wide analytics and reporting.

• ◆Optimize ClickHouse query and cluster performance through schema, indexing, and partitioning improvements.
• ◆Design and maintain data marts in ClickHouse for reporting and analytical use cases across teams.
• ◆Build and maintain Apache Spark pipelines for large-scale data processing and transformation.
• ◆Orchestrate and monitor data workflows using Apache Airflow, ensuring reliable and timely pipeline execution.

4Sale International Co. (4Sale)

2025 — 2026 · Cairo, Egypt

Own and operate backend and analytics systems supporting growth, marketing, and product teams across Kuwait's largest classifieds marketplace.

• ◆Reduced analytics query latency from 10+ minutes to under 5 seconds by building a time-series analytics layer with TimescaleDB.
• ◆Cut storage footprint by ~50% through continuous aggregates and data retention strategies.
• ◆Built event-driven backend services on AWS, reducing incorrect push notifications by 30% and improving system reliability.
• ◆Reduced P95 API latency from ~1.6 seconds to under 450 ms on production services.
• ◆Built an internal scheduling platform on top of EventBridge, replacing ad-hoc automation scripts with a centralized and observable solution.
• ◆Built internal tooling that helped teams investigate metric changes faster and reduced time spent on root-cause analysis.
• ◆Diagnosed and fixed production data quality issues, restoring trust in analytics used for business decision-making.

Orange Digital Center

2024 · Egypt

• ◆Built and optimized data processing workflows using Apache Spark and Hive.
• ◆Worked with distributed systems and large-scale datasets across the Hadoop ecosystem.
• ◆Improved analytical workloads and reporting pipelines through query and data processing optimizations.