Senior Data QA Engineer

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

Benefits offered by this job

37 days annual leave

Vitality private healthcare

£500 learning fund

Monthly free lunch

Job summary

Searchland is a high-growth prop-tech SaaS company delivering real-time property data to developers, agents and planners. We seek a Senior Data QA Engineer to own data accuracy, recency and reliability across our expansive UK datasets and pipelines.

You will harden validation, improve anomaly detection, keep scrapers healthy, and ship practical tooling to empower the team. This role blends data, engineering and AI-assisted coding to raise our quality bar.

Qualifications

• Strong Python and SQL with hands-on experience with dbt and BigQuery.
• Track record designing data quality checks - validation, anomaly detection, freshness and coverage monitoring.
• Experience running production web scraping at scale - Playwright, proxies, anti-bot evasion, and monitoring scraper health.

Responsibilities

• Design and build data quality checks - validation, anomaly detection, freshness and coverage monitoring across 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 using AI-assisted coding tools to move quickly.
• 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 data and engineering to raise the overall quality bar.

Skills

Python

SQL

Data quality checks

AI-assisted coding tools

Dagster

Airflow/Prefect

Playwright

BigQuery

TypeScript/Node

Tools

Playwright

Dagster

Airflow

Prefect

dbt

BigQuery

Job description

Role: Senior Data QA Engineer

Reporting To: Head of Data

Salary: £75,000–£85,000, dependent on experience

Working Location: 1 - 2 days a week, hybrid to London office

PropTech | SaaS | Data Engineering

About Searchland

Searchland is a high-growth, B2B prop-tech company transforming how businesses and individuals access and leverage property data. Our platform empowers property developers, land agents, architects, and planners with real-time insights, helping them make smarter, data-driven decisions when acquiring and developing land.

In just six years, we’ve built one of the UK’s most advanced property data pipelines, integrating thousands of data sources and processing terabytes of information with less than 24-hour latency. Our cutting-edge platform is shaping the future of property intelligence.

About The Role

We're looking for a Senior Data QA Engineer to take ownership of the accuracy, recency and reliability of the data that powers our products. Over the past six years we have built one of the largest property data databases in the UK, across 1000s of different datasets with many different collection techniques, along with internal QA tools.

This role will specialise in taking our QA systems further: hardening the validation and anomaly detection that catches problems before our customers do, keeping our scrapers healthy and resilient as sources change under us, and shipping fast, practical tooling that makes the whole team more effective.

This is a role for someone who loves the \"why does this look wrong\" puzzle and wants to own and raise an existing quality bar rather than maintain someone else's.

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 (Playwright, proxy management, anti-bot handling) and keep scraper health visible and actionable


• Build and maintain data orchestration workflows (Dagster or similar) that are reliable and easy to debug


• Develop fast, pragmatic internal QA tools - using AI-assisted coding tools like Claude Code to move quickly — 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

What You'll Bring

• 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

Nice to have

• Geospatial data experience (PostGIS, GeoPandas, GDAL)


• GCP experience (GCS, Kubernetes/Docker)


• UK planning or property domain knowledge

Why Join Us?

Time Off

Rest properly. 37 days off in total, including your birthday and a full Christmas shutdown

Flexibility & Equipment

We offer flexible and hybrid working as well as WFH equipment provided so you can work well no matter the where

Growth & Development

We invest in your progression with a £500 annual fund to spend on courses, conferences or qualifications.

Health & Wellbeing

Your health matters. We cover it – physically, dentally and mentally with Vitality private healthcare

Culture & Perks

We work hard and we celebrate together – food, fun and plenty of team moments including a monthly free lunch and team activities & events

Fair & Transparent Compensation

We always share our salary ranges, progression frameworks and have a salary sacrifice pension scheme

Culture & Perks

We work hard and we celebrate together – food, fun and plenty of team moments including a free lunch (first week of every month) and monthly team activities & events

Our Commitment to Inclusion

We are committed to creating an inclusive and diverse workplace where everyone feels valued and empowered to thrive. We welcome applications from all backgrounds, regardless of race, ethnicity, gender, sexual orientation, disability, age, religion, or any other characteristic. If you require any adjustments during the recruitment process, please let us know—we are happy to support you.