Senior Data Scientist

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Senior Data Scientist

Hybrid – 1/2 days a week in Guildford

Up to £80,000


About the Role

Our client is a specialist technology and analytics consultancy delivering advanced data science solutions into complex, mission-critical environments. Working across sectors such as aviation, defence and high-reliability systems, they help organisations turn challenging, data-rich problems into scalable, impactful solutions.


They are now looking for a Senior Data Scientist to take a leading role across a portfolio of technically demanding projects. You’ll operate end-to-end – shaping problem definitions, engineering data pipelines, developing advanced models, and ensuring outputs are robust, explainable and deployable in real-world settings.


This is a hands-on role for someone who enjoys technical depth, variety, and ownership, and who is comfortable applying the right techniques to each problem – from statistical analysis through to machine learning and deep learning models.


You’ll join a small, high-calibre team that values autonomy, flexibility and technical excellence. The environment combines the rigour of mission-critical work with a modern, product-led mindset — giving you the opportunity to build scalable solutions, launch new capabilities, and see your work make a tangible impact.


Key Responsibilities

  • Translating complex, ambiguous problem statements into clear, actionable data science solutions.
  • Owning the full data science lifecycle, from data ingestion and feature engineering through to modelling, evaluation and deployment.
  • Developing statistical, machine learning and deep learning models to support high-impact, real-world decision making.
  • Working with large, structured and unstructured datasets, combining and enriching multiple data sources.
  • Collaborating closely with other data scientists, engineers and stakeholders to deliver production-ready solutions.


Your work will focus on delivering high-value outcomes, including:

  • Advanced statistical and probabilistic modelling.
  • Machine learning and deep learning model development.
  • Building scalable, maintainable analytical pipelines.
  • Delivering insight and models that perform reliably in complex operational environments.


What We’re Looking For

  • Strong experience in Python and SQL, including libraries such as Pandas, NumPy and scikit-learn.
  • Experience working with deep learning frameworks such as PyTorch or TensorFlow.
  • A solid grounding in statistics and probability, with strong mathematical foundations (calculus and linear algebra highly advantageous).
  • Experience working across the full data science project lifecycle.
  • A pragmatic, engineering-minded approach to data science, with a focus on real-world impact.
  • Strong communication skills and the ability to work collaboratively in technical, cross-functional teams.


If this role looks of interest, please apply below.


Please note – this role cannot offer sponsorship.

”, “datePosted”: “2026-05-01”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Harnham”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__419487373__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=584” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “Guildford” } } }
Company: Harnham
Apply for the Senior Data Scientist
Location: Guildford
Job Description:

Senior Data Scientist

Hybrid – 1/2 days a week in Guildford

Up to £80,000

About the Role

Our client is a specialist technology and analytics consultancy delivering advanced data science solutions into complex, mission-critical environments. Working across sectors such as aviation, defence and high-reliability systems, they help organisations turn challenging, data-rich problems into scalable, impactful solutions.

They are now looking for a Senior Data Scientist to take a leading role across a portfolio of technically demanding projects. You’ll operate end-to-end – shaping problem definitions, engineering data pipelines, developing advanced models, and ensuring outputs are robust, explainable and deployable in real-world settings.

This is a hands-on role for someone who enjoys technical depth, variety, and ownership, and who is comfortable applying the right techniques to each problem – from statistical analysis through to machine learning and deep learning models.

You’ll join a small, high-calibre team that values autonomy, flexibility and technical excellence. The environment combines the rigour of mission-critical work with a modern, product-led mindset — giving you the opportunity to build scalable solutions, launch new capabilities, and see your work make a tangible impact.

Key Responsibilities

  • Translating complex, ambiguous problem statements into clear, actionable data science solutions.
  • Owning the full data science lifecycle, from data ingestion and feature engineering through to modelling, evaluation and deployment.
  • Developing statistical, machine learning and deep learning models to support high-impact, real-world decision making.
  • Working with large, structured and unstructured datasets, combining and enriching multiple data sources.
  • Collaborating closely with other data scientists, engineers and stakeholders to deliver production-ready solutions.

Your work will focus on delivering high-value outcomes, including:

  • Advanced statistical and probabilistic modelling.
  • Machine learning and deep learning model development.
  • Building scalable, maintainable analytical pipelines.
  • Delivering insight and models that perform reliably in complex operational environments.

What We’re Looking For

  • Strong experience in Python and SQL, including libraries such as Pandas, NumPy and scikit-learn.
  • Experience working with deep learning frameworks such as PyTorch or TensorFlow.
  • A solid grounding in statistics and probability, with strong mathematical foundations (calculus and linear algebra highly advantageous).
  • Experience working across the full data science project lifecycle.
  • A pragmatic, engineering-minded approach to data science, with a focus on real-world impact.
  • Strong communication skills and the ability to work collaboratively in technical, cross-functional teams.

If this role looks of interest, please apply below.

Please note – this role cannot offer sponsorship.

Posted: May 1st, 2026