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Lead Data Scientist*

Hackajob

Hackajob

Data Science
United Kingdom
Posted on Mar 14, 2026
hackajob is collaborating with Next Ltd to connect them with exceptional professionals for this role.

Lead Data Scientist

Job Description

We are looking for a Lead Data Scientist to join the eCommerce Data team! Based from

NEXT Head Office in Enderby, Leicestershire with a competitive salary range and great

benefits..

Let’s talk numbers. When it comes to UK retail, it’s hard to find a bigger name. We sell

thousands of items an hour and are expanding our e-commerce business by the second. For

anyone in Tech, this is the place to learn. To grow. And to thrive.

eCommerce Data provides the department and the business the means to see what is

working and what is not by drawing data and analysing patterns of shopping on our site

and in general.

The role

As a Lead Data Scientist within Marketing Science at NEXT, you will build data-driven

solutions through state-of-the-art machine learning, causal inference, and experiment

design to measure true impact and make impactful recommendations to the business. As a

lead, you are expected to handle end-to-end projects and mentor junior/senior data

scientists whenever relevant. What else is involved?

  • Working closely with marketing teams and agencies to understand challenges and

opportunities in e-commerce marketing.

  • Proactively lead the design, development, and deployment of data science solutions

that inform marketing strategy and execution.

  • Build Marketing Mix Modeling (MMM), predictive modelling, lifetime value prediction,

churn analysis, marketing attribution, and channel optimisation.

  • Partner with marketing stakeholders to test, learn, and optimize campaigns through

experimental design and/or causal inference methods.

  • Create dashboards and data products that enable self-serve analytics and real-time

insights for marketing teams.

  • Drive data quality, model governance, and documentation standards across the

marketing science function.

Required Qualifications

  • Bachelor’s , Master’s degree or higher education in Statistics, Computer Science, Data

Science, Economics, or related field.

  • 6+ years of experience in applied data science or analytics, with 2+ years in a

leadership or mentoring role.

  • Strong expertise in marketing analytics, building MMM model via Meridian, Robyn

and/or PyMc, multi-touch attribution, customer lifecycle modelling.

  • Proficiency in SQL, Python, R, PySpark and dashboarding in PowerBI/Looker.
  • Experienced running Geolift test, causal inference model, and other forms of

experimental design.

  • Solid foundation in machine learning, statistics, econometric modelling, analytical

and problem solving skills

  • Strong communication skills with the ability to translate complex data insights into

actionable business strategies.

  • Preferred experience in the e-commerce, technology or marketing industry.

You’ll be doing all this from our Leicestershire Head Office. Our offices are inspiring, yes. But

we understand that life happens. So, we’re big on making sure your work works for you which

is why we offer flexible working. Bring your energy. Play to your strengths. Make things

bigger and better than before.

So if you’re an expert in Data Science, have strong Python/SQL/Pyspark skills and

considerable knowledge in test design, implementation and reporting, can work with

initiative and can build great working relationships within the business, this is the place for

you - and your career.

Benefits

  • Competitive salary band of £64,000 - £77,000
  • Flexible working
  • Annual company performance based bonus
  • Sharesave scheme, which allows you to invest in NEXT and claim your share of our

success

  • Private Medical Insurance
  • Annual Pay Reward
  • Pension 3% Employer/ 5% Employee
  • 25 days holiday plus bank holidays (can also buy/sell up to 3 days)
  • 25% staff discount and free next day delivery to desk for online purchases
  • A newly refurbished subsidised restaurant and bar
  • Staff shops in Yorkshire and Leicestershire
  • Juice bar and coffee shop
  • Gympass - discounted gym membership
  • Free company bus service to and from Leicester city centre and other areas
  • Onsite nursery (salary sacrifice scheme) in Leicester
  • A digital GP healthcare service
  • & loads more!

The business

You know NEXT, but did you know we’re a FTSE-100 retail company employing over 43,000

people across the UK and Ireland. We’re the UK’s 2nd largest fashion retailer and for

Kidswear we’re the market leader. At the last count, we have over 500 stores, plus NEXT

Online and it’s now possible to buy online from over 70 countries around the world.