Hybrid Principal Data Engineer – AWS/Snowflake/dbt

Harnham; Greater London; On-site; GBP 90,000 - 110,000; Full time

Benefits offered by this job

Hybrid work model (3 days in office)

Competitive salary (£90k–£110k)

Collaborative, growth-focused culture

Job summary

Harnham is seeking a Principal Data Engineer in London/Harmondsworth to combine hands-on engineering with technical leadership and people management. You will lead data engineering initiatives, shape engineering standards, and drive delivery of data products in a modern cloud environment.

You will mentor engineers, establish best practices, and partner with senior stakeholders to align technical solutions with business objectives, all while shaping a scalable cloud data ecosystem using AWS,

Qualifications

• 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.

Responsibilities

• 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.

Skills

Data engineering leadership

Stakeholder management

SQL

Data modelling

CI/CD

DevOps practices

Mentoring

Technical influence

Tools

AWS

Snowflake

dbt

Job description

Harnham is seeking a Principal Data Engineer in London/Harmondsworth to combine hands-on engineering with technical leadership and people management. You will lead data engineering initiatives, shape engineering standards, and drive delivery of data products in a modern cloud environment.

You will mentor engineers, establish best practices, and partner with senior stakeholders to align technical solutions with business objectives, all while shaping a scalable cloud data ecosystem using AWS,