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Internship · London (Hybrid)

About Jaja   

Jaja is a consumer finance business, launching its first product, a digital credit card, in 2018. With backing from several major Private Equity funds, Jaja has an ambitious growth strategy that includes providing consumer finance in partnership with leading consumer brands, with a number of partnerships secured alongside an exciting pipeline of opportunities.  Jaja is on a mission to redefine the consumer finance experience and liberate customers from needless complexity, wasted time, and frustration. Or as we say it, Make Simple. We will delight our customers – making the customer experience simpler, more enjoyable, more intelligent – treating customers fairly and giving them more control of their money.

Our Mission: To be the UK’s Digital Lender of Choice

Our Company Values: Collaboration, Excellence, Innovation, Empathy, Passion

Why join us?   

This is a chance to make a real impact in a growing business on a mission to change the face of the consumer finance industry forever.

We have a collaborative team structure fuelled by an exciting mix of people welcoming both experienced people from the industry with both feet on the ground and tech-savvy dreamers who pave way for the new stuff. Come as you are and be yourself!

About the Role

We are seeking two highly motivated candidates to join our AI development team and help advance the capabilities and quality of ‘Airi’, our GenAI-powered customer-facing chatbot. This role combines development, iterative experimentation, and live product monitoring and enhancement. You will collaborate closely with various teams across the organization to define and execute our continual optimization process. If you’re passionate about pushing the boundaries of AI technology and delivering exceptional user experiences, this role is for you.

This role runs from July 1st, 2024, until September 6th, 2024. If based in the UK, it is expected that candidates would be able to travel to our London office to work or attend workshops as required. The role is a full-time role, 5 days per week Mon – Fri.


  • Design, develop, and implement new features and functionalities for Airi to improve user engagement and satisfaction.
  • Continuously enhance Airi’s conversational abilities by integrating cutting-edge prompting techniques and knowledge base optimisation.
  • Explore novel approaches to improve conversation flow, response accuracy, and user understanding.
  • Monitor Airi’s performance in real-time, identifying and resolving issues to ensure seamless user interactions.
  • Conduct thorough testing and validation of new features and enhancements to maintain Airi’s high quality and reliability standards.
  • Collaborate with QA teams to develop comprehensive test plans and ensure comprehensive test coverage.
  • Collaborate with data scientists and researchers to leverage data-driven insights for continuous improvement.

You could be a good fit if you:

  • Have a Bachelor’s degree in Computer Science, Engineering, Mathematics, Statistics or a related field
  • Experience in Python and familiarity with AI frameworks, LLMs and libraries (e.g., Claude, Hugging Face, Langchain, TensorFlow, PyTorch).
  • Linguistics proficiency – Have a solid understanding of language constructs, syntax, and the ability to clearly and concisely create adaptive queries and instructions that will elicit informative and contextually relevant responses.
  • May have some experience in software development with a focus on AI and prompt engineering on LLMs- even if it’s just playing around with your own project.
  • Understanding of machine learning algorithms and techniques, particularly in the context of LLMs/conversational AI.
  • Excellent problem-solving skills and attention to detail, with a passion for delivering high-quality products.
  • Strong communication and collaboration skills, with the ability to work effectively in cross-functional teams.

What’s in it for you?    

  • The chance to make a real impact in a growing start-up on a mission to change the face of the consumer finance industry forever.
  • Competitive salary
  • Employee assistance program
  • Off-site get togethers.
  • 5 day holiday allowance plus UK bank holiday

Fair Processing Notification

The personal information we have collected from you will be shared with Cifas who will use it to prevent fraud, other unlawful or dishonest conduct, malpractice, and other seriously improper conduct. If any of these are detected you could be refused certain services or employment. Your personal information will also be used to verify your identity. Further details of how your information will be used by us and Cifas, and your data protection rights, can be found by [https://www.cifas.org.uk/fpn].


About JAJA

Jaja is on a mission to redefine and simplify the credit card experience, giving people more time to do the things they love. It’s in our DNA. If things are complicated, we fix them. We Make Simple.

We’ve created a simple-to-use app and online service, to simplify how people manage their money in an ever-increasing world of self-fulfilment. We believe in giving our customers the freedom of get things done effortlessly, when and wherever they want.

Jaja is rooted in simplicity and is what drives us every day. Find out more about the Jaja card visit jaja.co.uk #jajayourlife


We’re not just stopping with our own credit card. We’ve built a technology platform which enables us to bring life to credit cards and financial products from a range of partner businesses. Applying the Jaja Magic to other brands helps us to ‘make simple’ for even more customers.

We create both co-branded credit cards and co-branded payment solutions for our partners.

Find out more about our partnerships: https://jaja.co.uk/business/


The Jaja Magic is in the mix of our people.

We’re committed to designing brilliantly simple and liberating products. To do this, we’ve built a talented team of problem solvers, proven innovators and finance experts.

We’re expanding, fast. And we’re looking for great people to help us continue our vision and shape the future.

Find out more about our positions here: https://jaja.co.uk/careers/