Data Scientist

The BDPN; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Zempler Bank is seeking a Data Scientist to help shape how data is used to protect customers, widen access to credit and create thoughtful experiences. You will work on meaningful problems across the business, collaborating with teams to implement models and extract value from data.

You will develop and deploy algorithms in Python, monitor performance, and explore new data sources to improve financial outcomes. Hybrid work is offered with some office days.

Qualifications

• Strong understanding of the mathematical and statistical concepts underpinning data science.
• Good understanding of SQL.
• Natural curiosity to develop new data signals and understand why things happen.
• Ability to work independently and as part of a team.
• Experience with interpretability tools and deploying models to production.

Responsibilities

• Developing algorithms in Python using linear and non-linear techniques.
• Monitor and retrain models as needed to maintain performance.
• Explore new data sources to extract value for Zempler Bank.
• Deploy models into production using Airflow, PyFlink, BentoML, Git, Jenkins, Octopus.
• Communicate results to non-technical audiences and coordinate with stakeholders.

Skills

DataScientist

Tools

Airflow

PyFlink

BentoML

Git

Jenkins

Octopus

Docker

MLFlow

Flink

Spark

Job description

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

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)

Job type

Permanent

Skills

DataScientist

Why Zempler Bank

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 holiday a year, for times when you might need some extra cash or a longer break.

On top of your salary, we include an additional benefit allowance that you can use on whatever matters most to you – private medical, topping up your pension, or simply absorb this into your monthly income.

Support & inclusivity

We want to make sure we’ve got your back. Making sure you’ve got the right work-life balance is important to us.

This means flexible working opportunities for lots of different life stages and personal situations, including offering enhanced parental leave and flexibility for those in all types of caring roles.

We are a DWP recognised "Disability Confident" employer, committed to providing equal opportunities to all employees irrespective of their sex, age, sexual orientation, marital status, religion, race or disability.

It is our policy to give positive consideration to disabled persons with respect to applications for employment, training, career development and promotion, having regards to each individual's particular aptitudes and abilities.

Our incredible team that run our Equality, Diversity, and Inclusion Group hold events and initiatives that reflect our vibrant workplace. We also collaborate with social mobility programmes to offer internships for people from underrepresented backgrounds.

We all have good and bad days. Our 24/7 GP helpline gives access to support when you need it. We also throw in a cycle to work scheme and holistic wellbeing programme to keep you in tip top shape.

Learning & growth

We believe in lifelong learning. We also know that how and what you learn, is your choice.

We have a flexible programme which allows you to create your own development plan based on your interests, diary commitments, and goals.

From regular lunch and learns and our manager and leadership development programmes to mentoring scheme and LinkedIn Learning where you’ll have unlimited access to over 21,000 expert led courses at the click of a button.

Hybrid working (where applicable in line with our internal "Hybrid Working" policy)