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# Principal Data Engineer

- **Company:** Harnham
- **Location:** London, UK
- **Salary:** £90,000.0 - £110,000.0
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Continuous Integration, Information Engineering, Data Transformation, DevOps, Operational Databases, Software Engineering, SQL Databases, Snowflake, Data Management
- **Published:** October 14, 2026
- **Apply:** https://www.reed.co.uk/jobs/principal-data-engineer/57455570

## About the Role

The successful Principal Data Engineer will have the following skills and experience:

 * Strong commercial experience in Data Engineering and modern software engineering practices
 * Expertise working with AWS cloud services
 * Experience building and scaling solutions within Snowflake
 * Strong knowledge of dbt and modern data transformation methodologies
 * Excellent SQL and data modelling capabilities
 * Experience with CI/CD, DevOps practices, testing, monitoring, and operational support
 * Ability to lead technical discussions and influence engineering decisions across teams
 * Experience managing, coaching, or mentoring engineers
 * Strong stakeholder management and communication skills
 * Ability to thrive within large, complex organisational environments

## Description

This is an opportunity to join a large-scale organisation undergoing an exciting transformation of its data capabilities. You'll play a key role in shaping engineering standards, influencing technical direction, and leading the delivery of business-critical data products within a modern cloud environment., As a Principal Data Engineer, you will combine hands-on engineering with technical leadership, people management, and stakeholder engagement.

Specifically, you can expect to be involved in the following:

 * Providing technical leadership across Data Engineering, Software Engineering, and DevOps practices
 * Building, improving, and maintaining scalable data platforms and pipelines
 * Working closely with engineering teams to establish best practices, standards, and delivery frameworks
 * Troubleshooting complex technical challenges and helping unblock delivery teams
 * Leading, coaching, and mentoring engineers to support their professional development
 * Driving continuous improvement across data products, tooling, and engineering processes
 * Collaborating with senior stakeholders to align technical solutions with business objectives
 * Supporting the ongoing evolution of a modern cloud-based data ecosystem using AWS, Snowflake, and dbt
 * Contributing to the operation, monitoring, optimisation, and reliability of production data systems