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Harnham

Data Wrangler (Contract)

Hybrid

London, United kingdom

£ 800 /day

Freelance

06-03-2026

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Skills

Python Tableau SQL Data Engineering Problem-solving Decision-making power bi AWS Analytics Snowflake Data Science

Job Specifications

London (Hybrid - 2-3 days onsite)

£600-£700 per day | Inside IR35
Initial contract until June with strong extension potential

Harnham are supporting a large-scale transformation programme within a global transport and logistics group, as they continue to scale their data and AI capabilities across multiple operational functions.

This role sits within a high-impact transformation team focused on building analytical products and optimisation solutions to improve complex operational processes and supply chain performance.

The team is delivering data-driven solutions across operational domains, with the long-term goal of scaling these products across other business units.

The Role

This position bridges data engineering and analytics, focusing on preparing, analysing, and validating data before it feeds into a cloud-based analytics platform.

You will transform complex operational datasets into actionable insights and dashboards, supporting rapid decision-making.

The environment is highly collaborative, with analysts and engineers problem-solving together to tackle complex operational challenges and deliver high-value prototypes.

Key Responsibilities

Analyse and prepare datasets prior to ETL ingestion

Work with SQL, Python, and Snowflake to explore, clean, and validate operational data

Build prototypes and MVP dashboards to demonstrate value quickly

Collaborate with analytics and optimisation teams on modelling initiatives

Deliver clear visualisations and insights for operational stakeholders

Identify data issues and ensure trustworthiness

Support optimisation of resource planning, logistics, and operations

Skills & Experience

Required:

Strong SQL and Python skills

Experience with Snowflake or modern cloud data platforms

Experience preparing and analysing data pre-ETL

Experience building dashboards or visualisations (Power BI, Tableau, Looker, or similar)

Strong analytical mindset with the ability to translate data into business value

Preferred:

Experience with AWS environments

Familiarity with modern ETL frameworks

Experience collaborating with data science or optimisation teams

Candidate Profile

The ideal candidate will be:

Highly analytical and proactive

Comfortable in fast-moving, ambiguous environments

Able to turn imperfect data into usable insights

Confident communicating with stakeholders across multiple functions

Why Join This Programme?

Work on a major operational transformation programme

Build analytics products that directly influence high-value decisions

Collaborate with cross-functional analytics, engineering, and operations teams

Opportunity for long-term contract extensions and future projects

Interested?

Apply via Harnham or contact us directly for a confidential discussion about this opportunity.

About the Company

Harnham provides specialist Data and AI recruitment and staffing services, along with bespoke training solutions, across multiple industry verticals, operating in the UK, the USA and EU - contact us today to discuss your requirements: info@harnham.com Our recruitment and talent teams cover all aspects of the data and AI pipeline, from collection to consumption, across multiple data roles and functions. Whether you need full-time staff, contract talent, specialized training, Data-qualified graduates, or C-suite executives... Know more