Senior Kotlin/JVM Engineer

🔒 Confidential Employer
Posted 28 April 2026
LOCATION
London
TYPE
Full-time
LEVEL
Mid-Senior level
SALARY
£140,000 / year
CATEGORY
Fintech
This employer holds a UK Home Office sponsor license — sponsorship for this specific role is at the employer’s discretion

SKILLS

Kotlin JVM Java Databases Relational Databases NoSQL Automated Tests Kanban

FULL DESCRIPTION

Senior Kotlin/JVM Engineer

Company: [Employer hidden — view at passion-project.co.uk]

Location: London

Work Type: Hybrid (3-5 days a week in office)

Salary: £60,000 - £140,000 per year

About the Role

We're looking for an engineer with a depth of knowledge and recent hands-on Kotlin experience or JVM based engineering experience that enables them to not only deliver elegant, idiomatic solutions in Kotlin or Java but also to contribute new knowledge and experience to our frequent collaborative design forums with stakeholders from every area of the business.

As we continue to build upon the diversity of our team we are thrilled to have the opportunity to bring on board a Senior Kotlin/JVM Engineer. This is an opportunity to bring new experience, perspective and capabilities to our design discussions, helping shape our approach to delivering elegant solutions to complex engineering challenges as we continue to grow. This is the team that put the Tech in FinTech, our current tech team is around 80 strong and have helped transform finance by building a next-generation lending platform, a next-gen credit card, and auto-finance product, a Superapp and they’re at it again with brand new product launches this year. There’s a lot to do; building and integrating new API’s, tuning our existing services as they scale, supporting our expansion of new products and supporting services in the US.

Who you are

  • Strong commercial Kotlin or JVM based engineering experience (willingness to work with Kotlin)
  • An ability to write simple, clean code
  • Experience and understanding of databases; relational databases are a must, NoSql would be nice too
  • Be able to quickly understand complex, financial business domains
  • Understand different software architectures rapidly
  • Understands abstraction and interpolation
  • Able to write comprehensive, automated tests at all levels of the pyramid
  • Understanding of the Kanban agile methodology; not a deal breaker if you don’t
  • Someone who can get along with others and build relationships
  • Someone who wants to continually learn, improve and collaborate
  • Someone who can solve problems on their own but also knows when to go to their peers for help
  • Someone who is a rational thinker and is aware of the ‘why’ behind the way they do things
  • Someone who is a pragmatist who can sensibly weigh the tradeoffs between code quality and delivery

Our Tech Stack

Backend: Kotlin 1.7.20, AWS, GraphQL (it would be nice if you were familiar with this but it’s not a deal breaker), Postgres, RabbitMQ, Docker, Kubernetes

Frontend: React & React Native, TypeScript, MobX, Redux, Stylus and SASS

Other: We build our Kotlin projects using Gradle and GitHub Actions, deploying to production as soon as we finish a feature. We use JUnit Jupiter, Kotest and TestContainers for automated testing.

Company Benefits

  • Best-in-class compensation, including equity
  • Comprehensive private health insurance (including dental, optometry and general wellbeing)
  • Multiple opportunities to socialise with your team and the wider company
  • Equipment provided for you to do your best work!
  • You can work from home every Monday and Friday if you wish - on the other days we all come together IRL to be together, build and exchange ideas (hybrid)
  • Our in-house chefs prepare fresh, healthy lunches in the office every Tuesday-Thursday
  • EV car scheme (Octopus)
  • Cycle to work scheme
  • Pension
  • 25 days of annual leave - excluding bank holidays
  • 50% off gym memberships at Virgin Active and Nuffield (via Vitality health insurance)

Application Instructions

Apply

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