Data Modeller

Harnham; Slough; Hybrid; GBP 39,000 - 65,000; Full time

Job summary

Harnham is seeking a Data Modeller in London with a focus on developing and maintaining conceptual, logical, and physical data models to support major business initiatives.

You will collaborate with data engineers, analysts, and governance teams to shape data standards and modernise platforms, with a clear path toward a Data Architect role through mentoring and hands‑on experience.

Qualifications

• Strong commercial experience in data modelling across enterprise environments.
• Experience with dimensional modelling, Kimball, or Data Vault.
• Exposure to cloud data platforms, ideally Microsoft ecosystem.
• Familiarity with DBT, Python, PySpark is beneficial.
• Experience in data transformation or modernisation programmes.

Responsibilities

• Develop and maintain conceptual, logical, and physical data models to support key business initiatives.
• Contribute to the design and evolution of data architecture standards and best practices.
• Work across multiple projects, ensuring consistency in modelling approaches and data structures.
• Collaborate with data engineers, analysts, and governance teams to deliver high‑quality data solutions.
• Support the transition towards modern, cloud‑based data platforms and architectural frameworks.
• Engage with stakeholders to translate business requirements into structured data models.
• Learn and develop towards a Data Architect role through mentoring and hands‑on experience.

Skills

Data modelling

Dimensional modelling

Kimball modelling

Data Vault modelling

Cloud data platforms

Microsoft ecosystem

DBT

Python

PySpark

Stakeholder engagement

Tools

DBT

Python

PySpark

Job description

Data Modeller

London (Hybrid, 2 days per week onsite) | Up to £65,000 + benefits

This is a rare opportunity to join an organisation undertaking a major data and digital transformation, with a clear path from data modelling into data architecture. You will step into a role designed for long‑term growth, working closely with senior architects and influencing how data is structured and used across the business.

The Company

They are a large, highly regulated organisation responsible for maintaining professional standards across a significant workforce in the UK. With a strong focus on public impact, they are investing heavily in modernising their data platforms, governance, and architecture. Their data function plays a critical role in driving informed decision‑making and improving organisational outcomes. You will join a collaborative, forward‑thinking team committed to building scalable and robust data solutions.

The Role

• Develop and maintain conceptual, logical, and physical data models to support key business initiatives
• Contribute to the design and evolution of data architecture standards and best practices
• Work across multiple projects, ensuring consistency in modelling approaches and data structures
• Collaborate with data engineers, analysts, and governance teams to deliver high‑quality data solutions
• Support the transition towards modern, cloud‑based data platforms and architectural frameworks
• Engage with stakeholders to translate business requirements into structured data models
• Learn and develop towards a Data Architect role through mentoring and hands‑on experience

Your Skills and Experience

• Strong commercial experience in data modelling across enterprise environments
• Experience with data modelling methodologies such as dimensional modelling, Kimball, or Data Vault
• Exposure to modern cloud data platforms, ideally within the Microsoft ecosystem
• Familiarity with tools such as DBT, Python, or PySpark is beneficial
• Experience working in data transformation or modernisation programmes
• Understanding of architecture principles or a clear interest in developing into a Data Architect
• Confidence engaging with both technical and non‑technical stakeholders

What They Offer

• Salary up to £65,000 with flexibility for highly relevant experience
• Hybrid working model with a central London office location
• Clear progression pathway into Data Architecture
• Mentorship from experienced architecture leadership
• Opportunity to shape data standards within a large‑scale organisation
• Collaborative team environment with strong cross‑functional exposure