Data scientist Work, Jobs in Chertsey, Sry (with Salaries)

Senior/Lead Data Scientist -Fraud
Klarna Bank AB —London
- £81,425 - £116,438 a year
- Full-time
- Computer Science
- AWS
- Machine learning
13d
Graduate Programme 2027: Data Scientist and Analyst
Revolut —London
- £10,800 a month
- Full-time
- Hybrid work
- English
- Maths
- Communication skills
AI Health Technology Research Specialist
IT VALLEY (LONDON) LIMITED —Egham
- £40,000 - £45,000 a year
- Full-time
- Hybrid work
- Analysis skills
- No degree
- AI
Quick apply
Data Scientist I
MarketCast UK —London
- Hybrid work
- Computer Science
- Master's degree
- AWS
- Annual leave
- Flexitime
Quick apply
Math, Physics & Engineering Graduates
Prima —London
- £80,000 - £160,000 a year
- Hybrid work
- English
- Analysis skills
- Maths
- Work from home
Quick apply
Data Scientist
Prima —London
- £80,000 - £160,000 a year
- Hybrid work
- English
- Analysis skills
- Machine learning
- Work from home
Quick apply
Graduate Data Scientist
G MASS —London
- £30,000 - £35,000 a year
- Hybrid work
- Computer Science
- Machine learning
- APIs
Quick apply
Data Scientist – Agentic AI - Permanent UK
Satalia —London
- Remote
- Computer Science
- APIs
- AI
- Flexible schedule
Quantitative Analyst (Math, Physics & Engineering degrees)
Prima —London
- £80,000 - £160,000 a year
- Hybrid work
- English
- Analysis skills
- Machine learning
- Work from home
Quick apply
Junior AI Software Engineer
Vodafone —London
- Full-time
- Computer Science
- Engineering
- No degree
Data Scientist I (BF5838)
PDI Technologies —Maidenhead
- Full-time
- Hybrid work
- AWS
- Analysis skills
- Bachelor's degree
Quick apply
Junior Data Scientist
Fospha —London
- Software troubleshooting
- AWS
- Machine learning
Quick apply
7d
Data Science Internship
G-Research —London
- Doctoral degree
- Research
- Master's degree
- Annual leave
Associate AI Engineer (6-month contract)
Board International —London
- Full-time
- Azure
- ERP systems
- Analysis skills
Data Science Machine Learning Internship (Summer 2027)
Castleton Commodities International —London
- Full-time
- Analysis skills
- Maths
- Bachelor's degree
Data Scientist
Trainline —London
- Full-time
- Hybrid work
- Communication skills
- Analytics
Graduate Machine Learning Researcher - Chicago
IMC Financial Markets —London
- £300,000 a year
- Full-time
- Doctoral degree
- Computer Science
- Research
- Annual leave
Data Scientist - Geo Holdout (12 month FTC)
WPP Media —London
- Full-time
- Hybrid work
- Communication skills
- Annual leave
- Employee discount
Data Scientist II - Data Science Consulting
MarketCast UK —Reading
- Hybrid work
- Computer Science
- Master's degree
- AWS
- Annual leave
- Flexitime
Quick apply
AI Engineering Intern
Medpace, Inc. —London
- Full-time
- Doctoral degree
- Computer Science
- Master's degree
- Annual leave
- Work from home

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Senior/Lead Data Scientist -Fraud

Klarna Bank AB -
London

Apply Now

Job details

Full-time
£81,425 - £116,438 a year
13 days ago

Qualifications

Computer Science
AWS
CI/CD pipelines
Machine learning
Machine learning modelling
Mentoring
Physics
Data pipeline
Fraud prevention and detection
Data science
Jenkins

Full job description

What you will do

We are rebuilding our fraud detection systems from the ground up, and we are looking for data scientists who want the full mandate to do it right, from raw data to production model, at a scale that affects hundreds of millions of transactions. Klarna is a big company that still moves like a startup: fast decisions, real ownership, and models that ship. We own the full stack, and expect you to build it with us to enable your use cases. If you have the curiosity to find the right problem, the grit to build the right solution, and the ambition to see it matter, this is the opportunity.

Fraud is one of the most technically demanding problem spaces at Klarna. You will build best-in-class machine learning systems from the ground up, owning the complete pipeline from raw data through feature engineering, model design, training, and real-time production deployment. A central part of this role is converting some of Klarna's existing rules-based fraud systems into sophisticated, model-driven architectures that operate at scale across hundreds of millions of transactions.

You will build infrastructure from scratch, not maintain or extend existing frameworks. Working with engineers, analysts, and commercial stakeholders, you will translate ambiguous business problems into precise technical solutions and bring novel approaches such as graph networks, anomaly detection, and behavioural signals into production where they create real impact.

Who you are

End-to-end ML ownership across the full stack: data engineering, feature development, model design, training, low-latency production deployment, monitoring, and retraining.
Strong instinct for when a model is ready for production and when it is not.
Proven track record of building ML models and pipelines from scratch, not integrating or extending someone else's product or tooling.
Experienced building real-time or near-real-time inference systems; batch pipelines alone are insufficient.
Comfortable with large-scale datasets including hundreds of millions of transactions and high-dimensional feature spaces.
Strong Python and SQL skills with hands-on experience in scikit-learn, LightGBM, Docker, Jenkins, and modern Python packaging.
Self-motivated, fast-moving, and creative. You bring novel solutions where others reach for off-the-shelf tooling.
Communicates precisely across technical and non-technical audiences including senior stakeholders.
Degree in computer science, physics, applied mathematics, astrophysics, automatic control, mathematics, software engineering, electrical engineering, or a related quantitative field.

Awesome to have

Experience building end-to-end ML systems in early-stage startups or small greenfield teams. This is a strong positive signal.
Hands-on production experience with graph neural networks, anomaly detection, or behavioural biometrics, beyond prototyping or fine-tuning.
Familiarity with AWS (SageMaker, Lambda, S3, Athena) and CI/CD practices.
Experience mentoring or technically guiding other data scientists.

Please include a CV in English.

Curious to learn more about Klarna and what it’s like to work here? Explore our career site!

Apply Now

Refine Your Search

data scientist jobs in chertsey, sry

Senior/Lead Data Scientist -Fraud

Graduate Programme 2027: Data Scientist and Analyst

AI Health Technology Research Specialist

Data Scientist I

Math, Physics & Engineering Graduates

Data Scientist

Graduate Data Scientist

Data Scientist – Agentic AI - Permanent UK

Quantitative Analyst (Math, Physics & Engineering degrees)

Junior AI Software Engineer

Data Scientist I (BF5838)

Junior Data Scientist

Data Science Internship

Associate AI Engineer (6-month contract)

Data Science Machine Learning Internship (Summer 2027)

Data Scientist

Graduate Machine Learning Researcher - Chicago

Data Scientist - Geo Holdout (12 month FTC)

Data Scientist II - Data Science Consulting

AI Engineering Intern

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