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Data Scientist - Credit Risk Modelling

iwocaLondonData Science
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Salary
£60K - £90K GBP
Job type
Full-time
Work mode
Remote
Posted
4 Sept 2026
Status
Open · checked 7d ago

About this role

This position invites a skilled professional to join the Credit Risk Modelling team at iwoca, operating on a hybrid basis in London or remotely within the UK. The chosen candidate will develop and refine probabilistic machine learning models that drive critical lending decisions for small and medium-sized enterprises.

Role Overview

The Data Scientist - Credit Risk Modelling role places the candidate inside a specialized group of roughly twelve data scientists. This team manages credit risk and customer lifetime value modelling for lending operations in the UK and Germany. The daily work involves balancing the maintenance of existing production models with incremental development and exploratory research. Because prototyping costs have decreased through modern AI applications, research and development form a growing portion of the workload. Projects range from causal estimation of offer terms and IFRS accounting models to unifying automated and manual credit decision paths.

Key Responsibilities

Execute credit and customer lifetime value modelling projects alongside team members.
Ensure current production models remain healthy and performant.
Conduct research that reshapes how core underwriting and pricing models function.
Investigate open research questions, such as generalising credit and customer lifetime value frameworks.
Drive ambiguous problems from initial framing to a landed decision through rapid iteration.

Requirements

Strong communication abilities to write and speak clearly while adapting technical details to various audiences.
Solid statistical foundations in probability and statistics from a quantitative discipline, with a focus on uncertainty and calibration.
A research mindset dedicated to exploring new ways to add value and achieve step-change improvements.
Critical judgement to evaluate model outputs, defend reasoning under challenge, and assess AI tools effectively.
End-to-end analytical ownership to tackle ambiguous problems swiftly using new evidence.
High AI fluency, leveraging artificial intelligence as a primary tool for prototyping, automation, and research.

Nice to Have

Domain experience working in credit risk, lending, or customer lifetime value modelling.
Production machine learning experience building and shipping supervised models through exploration, training, deployment, and monitoring.
Knowledge of non-linear methods, cost functions, and inductive biases.
Experience with Bayesian methods, including hierarchical models, MCMC, or Bayesian updating.
Time series modelling background dealing with temporal data, drift, seasonality, or autocorrelation.
Proficiency in Python, the primary stack utilized by the team.

Skills and Tools

Python
Large Language Models (LLMs)
Probabilistic Machine Learning
Statistical Modelling and Bayesian Methods
Time Series Analysis

Salary and Benefits

The salary for this role ranges from £60,000 to £90,000 per year, alongside quarterly performance and salary reviews benchmarked against market rates. Employees receive flexible working hours, 25 days of annual holiday plus a birthday day off, options to buy or sell leave, unlimited unpaid leave, and a fully paid one-month sabbatical after four years. Additional perks include Vitality medical insurance with discounted gym membership, private GP services for family members, counseling and mental health support, 3% pension contributions, an employee equity incentive scheme, generous parental leave, a nursery tax benefit scheme, an electric car scheme, and a cycle-to-work scheme. Staff also enjoy a learning and development budget, access to online learning platforms, two annual company retreats, and office snacks and drinks.

About the Company

iwoca builds smart technology and data science solutions to provide flexible finance to small and medium-sized businesses. Having supported over 100,000 businesses with more than £4 billion in funding, the organization fosters a culture based on independent thinking, challenging untested logic, and evidence-based decision-making. The company operates offices in London, Leeds, Berlin, and Frankfurt.

How to Apply

To apply for this opportunity, please visit the official iwoca careers page to submit your application along with your salary goals.

Skills and tech stack

Questions candidates ask

Where is this job located?

This position can be performed on a hybrid basis from the London office or remotely from anywhere in the UK.

What is the salary range for this role?

The expected salary range for this position is from £60,000 to £90,000 per year.

What programming language does the team use?

The team utilizes Python as their primary programming stack.

What benefits are included with the employment?

Benefits include flexible working hours, 25 days of holiday, medical insurance, a private GP service, a 3% pension contribution, an employee equity scheme, parental leave, learning budgets, and two annual company retreats.

What is the primary mission of the team?

The Credit Risk Modelling team owns credit risk and customer lifetime value modelling for UK and German lending, driving fully automated and human-in-the-loop decision making.

Ready to apply?

The application is on the official iwoca careers page.

Apply on company site