Data Scientist

At Zempler Bank, data plays a vital role in how we make better, fairer decisions for our customers and colleagues. As a Data Scientist, you’ll help shape how we use data to protect customers, widen access to credit and create thoughtful, seamless customer experiences all while supporting Zempler Bank’s ambition to grow responsibly and sustainably.

This is a role for someone who enjoys solving meaningful problems, working collaboratively across the business and seeing their ideas make a real‑world difference for both customers and communities.

• You’ll work on problems that matter, helping protect customers and improve financial outcomes
• Your work will be used, not shelved you’ll see your ideas make a difference
• We value inclusive thinking, ethical data use and continuous learning
• You’ll be supported to grow your skills, explore new techniques and shape your career path
• We’re committed to creating a workplace where everyone feels welcome, respected and able to thrive

Hybrid Working

We are very proud to offer one of the most flexible hybrid working arrangements in the industry!

The expectation for this role, will involve a minimum of one day each week - working out of our London Bridge office

Key Responsibilities

Data Interpretations:

• Developing algorithms in Python using both linear and non-linear techniques
• Monitor ongoing performance of algorithms and retrain / redevelop where necessary
• Exploration of new data sources to test whether they can be of value to Zempler Bank
• Implement models into production using tools such as Airflow, PyFlink, BentoML, Git, Jenkins and Octopus
• Participate in business projects
• Manage the relationship with the model stakeholder
• Assist in requirements gathering and project scope definition.
• Coordination – checking in with stakeholders during the Model Development .
• Communicate results of model developments effectively to non-technical audience

Qualification, Skills and Experience

• Good understanding of SQL
• Strong understanding of the mathematical and statistical concepts which underpin Data Science
• Natural curiosity to develop new trains of thought and create new data signals. Driven to understand why things happen
• Ability to work independently and as part of a team
• Working knowledge of interpretability packages such as SHAP
• Experience in developing and applying algorithms within a commercial environment
• Prior experience working with highly imbalanced datasets for binary classification problems
• Event streaming data engineering tools such as Flink or Spark
• Experience with MLOps and tools such as Airflow, BentoML and MLFlow
• Use of Docker, CI/CD and SDLC (e.g. JIRA, Git, Jenkins, Octopus)

What makes us Zempler
We’re on a journey to make money simpler for the start-ups and small businesses that power the UK economy. We’re all about smart technology, customer service with a human touch, and bank accounts that meet real life needs.
That’s only possible thanks to an incredible team who are all in to make Zempler the best bank for Britain’s small but mighty businesses.
There are more than 300 of us, representing over 20 nationalities – a diverse mix of ideas and skills, collaborating to build great things. (And, of course, have some fun along the way.)
We’re committed to creating a culture where everyone feels valued for the work they’re doing. In 2023, we were inducted in the 'Best Companies' survey top 100 large businesses & Top 25 Financial Services businesses to work for in the UK.
Zempler are the only bank with a top five place in all three categories ranked in 2024 by CMA (Competition and Markets Authority) for business SME banking:
1) 5th in Overall service quality
2) 4th in Online and mobile banking services
3) 2nd in SME overdraft and loan services
Our values
We’re all in - For our customers, teams, and communities.
We’re up front - We tell it straight and make things simple.
We do it right - We own every decision and get stuff done.
We innovate with purpose - We think smart and act fast.
What we offer
Flexibility & choice
We offer 26 days (bank holidays on top) holiday per annum, rewarding long service with an additional day per year (up to 33). You can also buy and sell up to five days…