Specialized Testing

Data Pipeline Testing

Validating data integrity across every stage of your pipeline.

ETL PIPELINE — DATA QUALITY RUN
SRC
Postgres prod
2.4M rows
TF
Transform
✓ 48 rules
DST
Snowflake DW
⚠ 3 nulls
Row count2,400,000 = 2,400,000
Schema match22/22 columns valid
Null rateemail: 0.012% (above threshold)
Dupes0 duplicates detected
Overview

What this engagement covers.

Data pipeline failures are silent — bad data flows downstream without errors before anyone notices. We build assertion suites covering schema correctness, row counts, null rates, referential integrity, and transformation logic.

Schema validation

Source and target schemas verified against contracts on every pipeline run.

Row count reconciliation

Input-to-output record counts compared with tolerance thresholds.

Data quality assertions

Null rates, duplicate detection, and range validation per column.

Transformation logic testing

Business rules verified with known input/output pairs.

Schema drift detection

Upstream schema changes detected before they corrupt downstream tables.

SLA monitoring

Pipeline completion time and data freshness tracked against defined SLAs.

Primary tooling
dbt tests · Great Expectations · Soda · Apache Airflow · custom SQL assertions
Deliverables
Assertion suite, schema contract documentation, data quality dashboard, SLA report
Start Here

Ready to get started?

A 30-minute working session to understand your stack, release cadence, and risk profile. A written scope follows within three business days.