Senior Data QA Engineer — Hybrid, BigQuery & Data Quality

Searchland; Greater London; Hybrid; GBP 75,000 - 85,000; Full time

Benefits offered by this job

Hybrid working

£500 annual learning budget

Private healthcare

Monthly team lunches

Salary transparency

Job summary

Searchland, a UK prop-tech SaaS data engineering company, is seeking a Senior Data QA Engineer to own data quality, validation, and anomaly detection across core pipelines.

The role is hybrid with 1–2 days per week in our London office. You’ll collaborate with the Head of Data and engineering teams to harden QA systems and keep scrapers healthy. Strong Python, SQL, dbt and BigQuery skills are essential, as is experience with Playwright and data orchestration tools.

Qualifications

• Strong Python and SQL with hands-on experience with dbt and BigQuery.
• A track record designing data quality checks - validation, anomaly detection, freshness and coverage monitoring.
• Experience running production web scraping at scale - Playwright (or equiv), proxies, anti-bot evasion, and monitoring scraper health.
• A fast, pragmatic builder mindset, fluent with AI-assisted coding tools (e.g. Claude Code).
• Experience with a data orchestrator - Dagster ideally, or Airflow/Prefect.
• Comfortable working in TypeScript/Node.

Responsibilities

• Design and build data quality checks - validation, anomaly detection, freshness and coverage monitoring - across our core data pipelines
• Own and improve production web scraping infrastructure and keep scraper health visible and actionable
• Build and maintain data orchestration workflows that are reliable and easy to debug
• Develop fast, pragmatic internal QA tools that help the team investigate and resolve data issues
• Work across Python, SQL, dbt and BigQuery to diagnose root causes, not just symptoms
• Get comfortable working in TypeScript/Node where internal tooling calls for it
• Partner across the data and engineering team to raise the overall quality bar, sharing context on what's fragile and why

Skills

Python

SQL

dbt

BigQuery

Data quality checks

Playwright

Tools

Dagster

Airflow

Prefect

Playwright

BigQuery

Job description

Searchland, a UK prop-tech SaaS data engineering company, is seeking a Senior Data QA Engineer to own data quality, validation, and anomaly detection across core pipelines.

The role is hybrid with 1–2 days per week in our London office. You’ll collaborate with the Head of Data and engineering teams to harden QA systems and keep scrapers healthy. Strong Python, SQL, dbt and BigQuery skills are essential, as is experience with Playwright and data orchestration tools.