Principal Data Engineer – AI Platform & Data Infrastructure

Dex; Greater London; On-site; GBP 100,000 - 140,000; Full time

Job summary

Dex partners with a Confidential Company to recruit a Staff or Principal Data Engineer. The role owns the technical direction for significant areas of data infrastructure and blends software and data engineering with architectural leadership.

You'll be a deeply hands-on contributor, defining scalable data acquisition, processing, and integration patterns while building infrastructure for quality, security, and privacy across the platform.

Qualifications

• Extensive experience building data-intensive production systems.
• Ability to lead major technical work as an IC, coordinating engineers beyond own code.
• Strong judgement on distributed processing, storage, reliability, and operational complexity.
• Hands-on, debugging-focused with production instincts.

Responsibilities

• Design and implement scalable data acquisition, ingestion, processing, and integration systems for large datasets.
• Build core infra for data quality, sanitisation, security, and privacy across the platform.
• Establish reusable data patterns and frameworks for other engineers to build on robust foundations.
• Identify architectural limitations in existing data approaches and lead the transition to scalable, resilient solutions.
• Provide hands-on technical direction and mentorship, staying close to code and production systems.

Skills

Data architecture

Data pipelines

Distributed systems

Production debugging

Technical leadership

Tools

AI tooling

Job description

Dex partners with a Confidential Company to recruit a Staff or Principal Data Engineer. The role owns the technical direction for significant areas of data infrastructure and blends software and data engineering with architectural leadership.

You'll be a deeply hands-on contributor, defining scalable data acquisition, processing, and integration patterns while building infrastructure for quality, security, and privacy across the platform.