Junior Data Scientist

Ravelin Technology

. Build out model evaluation and training infrastructure.

Posted 11/11/2026full-timeRemote • United KingdomJuniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and deploying machine learning models using the Python data stack, with a focus on fraud detection and model evaluation. Strong collaboration and communication skills are essential for working effectively with cross-functional teams and conveying complex technical concepts.

Highest-signal resume keywords

Machine Learning Model DevelopmentPython Data StackFraud Detection TechniquesModel Evaluation and DebuggingCollaboration with Cross-Functional Teams

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Machine LearningModel DeploymentModel EvaluationDebuggingFeature EngineeringData AnalysisStatistical AnalysisFraud DetectionNumpyPandas

Soft Skills

Analytical SkillsCollaborationCommunicationWorkload ManagementAdaptability

Tools & Technologies

SklearnPytorch

Industry Keywords

Fraud DetectionModel PerformanceSLA ManagementData EngineeringIntelligence and Investigations

Tech Stack

Tools & technologies

NumpyPandasPythonPyTorchScikit-Learn

About the role

Key responsibilities & impact

Build out model evaluation and training infrastructure.
Develop and deploy new models to detect fraud while maintaining SLAs.
Write new features in production infrastructure.
Research new techniques to disrupt fraudulent behaviour.
Investigate model performance issues using experience debugging models.
Train, deploy, debug, and evaluate fraud detection models.
Investigate ambiguous fraud cases and assess model veracity.
Build robust models that adapt to new fraud methods.
Make safe incremental progress toward better models for clients.
Collaborate with Data Engineering and Intelligence & Investigations teams.

Requirements

What you’ll need

Around 1 year's experience building and deploying ML models using the Python data stack (numpy, pandas, sklearn or pytorch).
Strong analytical skills.
Being a strong collaborator with colleagues outside of your immediate team, for example with client support teams or engineering.
Being skilled at communicating complex technical ideas to a range of audiences.
The ability to prioritise and to manage your workload.
Being comfortable working with a hybrid team.
Successful completion of pre-employment checks, including unspent criminal convictions, employment verification, and right to work.

Benefits

Comp & perks

Flexible Working Hours & Remote-First Environment — Work when and where you’re most productive, with flexibility and support.
Comprehensive BUPA Health Insurance — Stay covered with top-tier medical care for your peace of mind.
£1,000 Annual Wellness and Learning Budget — Prioritise your health, well-being and learning needs with funds for fitness, mental health, and more.
Monthly Wellbeing and Learning Day — Take every last Friday of the month off to recharge or learn something new, up to you.
25 Days Holiday + Bank Holidays + 1 Extra Cultural Day — Enjoy generous time off to rest, travel, or celebrate what matters to you.
Mental Health Support via Spill — Access professional mental health services when you need them.
Aviva Pension Scheme — Plan for the future with our pension program.
Ravelin Gives Back — Join monthly charitable donations and volunteer opportunities to make a positive impact.
Fortnightly Randomised Team Lunches — Connect with teammates from across the company over in person or remote lunches every other week on us.
Cycle-to-Work Scheme — Save on commuting costs while staying active.
BorrowMyDoggy Access — Love dogs? Spend time with a furry friend through this unique perk.
Weekly Board Game Nights & Social Budget — Unwind with weekly board games or plan your own socials, supported by a company budget.