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Emre KABALCI

@emrekabalci

I build and modernize large-scale data platforms, delivering reliable migrations, faster pipelines, and measurable cost savings.

Turkey

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At Udemy, I own the data layer for organizational and subscription domains, including one of the company’s first production data contracts. I also build marketing pipelines that guide ad-spend decisions across Google, Bing, LinkedIn, Meta, and Reddit Ads.

I migrated daily production ETL from dbt Cloud to dbt Core with zero disruption, saving $200K+ annually. I built replacement tooling for ad-hoc runs, run statistics, and backfills, while reducing monthly SEV issues by 47% through optimized models and dashboards.

I’ve led complex modernization work across Udemy and n11.com, from a zero-defect payment monolith-to-microservices rollout to an Oracle-to-GCP migration. At n11.com, I built a parallelized Python extraction tool that cut a 700M+ row table transfer time by 71%.

Earlier, I re-engineered telecom data warehousing and ETL systems for Turkcell Superonline, Zain Telecom, and Turkcell. I’ve replaced fragile pipelines, shortened daily processing from hours to minutes, built data-quality monitoring, and mentored engineers through high-stakes delivery.

Experience

Work history, roles, and key accomplishments

Current

Staff Data Engineer

Current

Udemy

Mar 2023 - Present (3 years 6 months)

Owns the data layer for Udemy's organizational and subscription data domain, delivering one of the first production data contracts. Led migration of daily ETL from dbt Cloud to dbt Core, saving $200K+ annually, and reduced SEV issues by 47%.

SQL Python Spark Databricks DBT Fivetran Airflow Data Modeling Data contracts Cloud Migration

Senior Data Engineer

Udemy

Aug 2021 - Mar 2023 (1 year 7 months)

Led Chartio-to-Looker migration and contributed to a company-wide payment monolith-to-microservices migration, ensuring zero-defect rollout. Adopted Airflow and migrated core workloads to Databricks Delta tables.

SQL Looker Snowflake Airflow Databricks Data Migration Data Modeling

Senior Data Engineer

n11.com

Dec 2020 - Jul 2021 (7 months)

Supported ETL and reporting on on-premise Oracle and GCP BigQuery. Built a parallelized Python-based Oracle extraction tool, cutting transfer time by 71%, and led the technical launch of an Oracle-to-GCP migration.

SQL Python Oracle BigQuery Airflow Dataproc Kafka Microstrategy Data Migration

Data Engineer

i2i Systems

Jul 2017 - Dec 2020 (3 years 5 months)

Re-engineered the data warehouse for Turkcell Superonline, replacing ODI-based ETL with an Ab Initio pipeline, cutting daily runtime to under 5 hours. Wrote a custom Ab Initio component to resolve charset mismatches.

SQL Ab Initio ODI Data Modeling ETL TMF

BI & DWH Consultant

Intellica

Jun 2016 - Jun 2017 (1 year)

Redesigned a DWH staging layer for Zain Telecom, diagnosing and fixing chronic data-loss issues in CDR ingestion. Wrote a Unix file-compaction script that cut daily ETL runtime from 15-18 hours to 3-3.5 hours.

SQL ODI Unix ETL Data Warehouse Data Quality

BI & DWH Developer

Turkcell

Jul 2014 - May 2016 (1 year 10 months)

Developed PL/SQL package-based data solutions for Finance and Marketing teams. Built a self-service tariff rate-management platform that contributed 200M+ TL in incremental revenue.

Pl SQL Oracle APEX ODI Ab Initio Data Warehouse