Harnham
Data Scientist - Fraud

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DATA SCIENTIST - FRAUD
SALARY UP TO £65,000 + EQUITY
HYBRID WORKING (TWICE A WEEK IN-OFFICE)
LONDON
Harnham are working with a fast-growing financial services organisation looking to hire an Applied Data Scientist to support and enhance its fraud prevention capabilities. This is an exciting opportunity for a data science professional who enjoys combining machine learning, analytics and business insight to tackle complex fraud challenges.
THE COMPANY
This organisation is a forward-thinking financial services business that places data and technology at the centre of its decision-making. With a strong focus on innovation, the company is investing heavily in fraud prevention, advanced analytics and machine learning to enhance customer protection and drive better business outcomes. Working within a collaborative and highly analytical environment, you'll have the opportunity to partner with teams across data, technology, risk and product to solve complex challenges and deliver meaningful impact.
Reasons to use Rodeo
I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?
Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.
Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.
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Graduate Consultant — 2026 Scheme
Why you're a good match
StrongYour economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.
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Why you're a good match
You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.
Experience fit
Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.
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THE ROLE
This is a mid-level Data Scientist position focused on fraud detection and mitigation. You will work across the full data science lifecycle, helping to develop fraud prevention strategies, build machine learning models and generate actionable insights using both internal and external datasets.
Specifically, you can expect to be involved in:
- Collecting, processing and analysing large, complex datasets to identify fraud trends, risks and opportunities.
- Designing, developing and maintaining fraud detection, identity resolution and predictive machine learning models.
- Evaluating new data sources and technology solutions through analysis, testing and proof-of concept initiatives.
- Monitoring model performance, producing reporting and visualising key insights for stakeholders.
- Collaborating with cross-functional teams on fraud, compliance and customer verification initiatives.


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SKILLS AND EXPERIENCE
The successful Data Scientist will have the following skills and experience:
- Experience within fraud analytics, fraud prevention or a related risk-focused data science environment.
- Strong machine learning and statistical modelling skills, with hands-on Python experience (including common data science libraries).
- Proficiency in SQL and experience working with multiple structured and external data sources.
- Experience deploying analytical or machine learning solutions into production environments.
- Excellent communication skills with the ability to present findings to technical and non-technical stakeholders.
BENEFITS
The successful Data Scientist will receive a salary up to £65,000 as well as equity.
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