Lakehouse Data Engineer — FinTech Analytics Platform

Commit; Warszawa; Hybrid; PLN 180,000 - 270,000; Full time

Job summary

Commit is seeking a Middle Data Engineer to own our data lake and lakehouse architecture, spanning bronze/silver/gold layers and Iceberg/Delta tables. You’ll land data via CDC streaming and ensure accurate, governance-driven data across AWS S3/Snowflake/Databricks for analytics, finance and regulatory teams.

Hybrid work in Kraków with 2 days onsite. You will optimize storage and processing for TB+ scale, enforce retention and GDPR rules, and maintain data quality with drift detection and

Qualifications

• 3+ years hands-on in a production lakehouse environment.
• Lakehouse architecture with bronze/silver/gold, open table formats, schema evolution.
• Data layout & query optimization at TB+ scale with partitioning, compaction, and sizing.
• Cloud lakehouse/DWH in production using Snowflake, Databricks, or BigQuery.
• CDC & streaming ingestion with Kafka + Debezium, handling late/duplicate events.
• Strong SQL and data modeling for financial ledgers.
• Governance: catalogs, lineage, access control, PII masking, retention.
• Cloud object storage (S3 or GCS) with tiering/archival.
• Python and an orchestrator (Airflow or Dagster).

Responsibilities

• Own the lakehouse architecture and data models for reliability and cost.
• Land operational data via CDC streaming, handle out-of-order events.
• Design data layout for speed and cost; optimize queries on major engines.
• Own retention, archival, and regulatory compliance incl. GDPR deletion.
• Ensure data freshness, drift detection, and reconciliation with source systems.
• Governance of catalogs, lineage, access controls, and audit trails.
• Monitor ingestion health, anomalies, and cloud spend.

Skills

Lakehouse

SQL mastery

CDC streaming

Python

Airflow

Tools

Snowflake

Databricks

Trino/Athena/Snowflake

Job description

Commit is seeking a Middle Data Engineer to own our data lake and lakehouse architecture, spanning bronze/silver/gold layers and Iceberg/Delta tables. You’ll land data via CDC streaming and ensure accurate, governance-driven data across AWS S3/Snowflake/Databricks for analytics, finance and regulatory teams.

Hybrid work in Kraków with 2 days onsite. You will optimize storage and processing for TB+ scale, enforce retention and GDPR rules, and maintain data quality with drift detection and