Senior Data Engineer

Cognify Search; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Job summary

Cognify Search in London is seeking a Principal Data Engineer to shape data as a product in a fast-growing AI SaaS start-up. You will own data pipelines, contribute to platform evolution, and work across product, data, and engineering teams to deliver high-impact analytics.

You’ll build scalable ETL pipelines using Python, SQL and PySpark, integrate complex systems, and turn real-world data challenges into clean, scalable solutions.

Qualifications

• Building complex ETL pipelines.
• Proficient in Python, SQL and PySpark.
• Experience integrating complex systems.

Responsibilities

• Building and optimising scalable data pipelines.
• Integrating complex systems.
• Turning messy, real-world problems into clean technical solutions.
• Contributing to new features as the platform evolves.

Skills

Python

SQL

PySpark

Job description

AI SaaS Start-up | Data as a Product | London (Hybrid)

We’re hiring for a unique opportunity at a fast-growing SaaS start-up with a standout product and serious traction. Backed by high-profile investors and already profitable, they’re scaling their team to meet demand across multiple levels, including:

• Principal Data Engineer

This is your chance to get in early.

We are looking for engineers who want visible impact, loves solving problems at the intersection of data and product, and wants real ownership in a fast-scaling company.

Here, data isn't a support function, it's the product.

You’ll help complex organisations implement and expand a platform that's reshaping how the industry operates through advanced analytics and AI to drive real-time decision-making.

You’ll be:

• Building and optimising scalable data pipelines
• Integrating complex systems
• Turning messy, real-world problems into clean technical solutions.
• Contributing to new features as the platform evolves

Requirements:

• Building complex ETL pipelines
• Python, SQL and PySpark expertise

Why now?

The company is scaling rapidly across industries.

Join now and you’ll:

• Shape how the platform evolves
• Learn directly from senior technical and business leaders
• Take on real responsibility and have meaningful progression