Staff Kotlin Engineer

Lendable; Greater London; Hybrid; GBP 70,000 - 90,000; Full time

Job summary

A leading fintech company in Greater London is seeking a Lead Kotlin Engineer to enhance their next-generation lending platform. In this role, you will leverage your expertise in Kotlin to build and integrate APIs, support product expansion, and participate in collaborative design discussions. The ideal candidate has strong mentorship skills and is adept in writing clean code. Enjoy best-in-class compensation, flexible work arrangements, and a supportive team culture at one of the UK’s fastest-growing tech companies.

Benefits

Best-in-class compensation including equity

Flexible work from home options

Fully stocked kitchen

Private health insurance

Qualifications

• Strong commercial Kotlin experience required.
• Strong mentorship and coaching experience expected.
• Ability to write simple, clean code is crucial.
• Experience with relational databases required; NoSQL is a plus.
• Understanding of complex financial business domains necessary.
• Quickly comprehend different software architectures.
• Ability to write comprehensive automated tests.
• Familiarity with Kanban Agile methodology preferable.

Responsibilities

• Build and integrate new APIs.
• Tune existing services as they scale.
• Support expansion of new products.
• Collaborate in design forums with stakeholders.

Skills

Kotlin

Mentorship

Clean code

Databases

Financial domains understanding

Software architectures

Automated tests

Kanban Agile methodology

Tools

AWS

GraphQL

Postgres

RabbitMQ

Docker

Kubernetes

React

TypeScript

JUnit Jupiter

GitHub Actions

Job description

About Lendable

Lendable is on a mission to build the world's best technology to help people get credit and save money.We're building one of the world’s leading fintech companies and are off to a strong start:

• Lendable is one of the UK’s newest unicorns with a team of just over 600 people
• Among the fastest-growing tech companies in the UK
• Profitable since 2017
• Backed by top investors including Balderton Capital and Goldman Sachs
• Loved by customers with the best reviews in the market (4.9 across 10,000s of reviews on Trustpilot)

So far, we’ve rebuilt the Big Three consumer finance products from scratch: loans, credit cards and car finance. We get money into our customers’ hands in minutes instead of days.

We’re growing fast, and there’s a lot more to do: we’re going after the two biggest Western markets (UK and US) where trillions worth of financial products are held by big banks with dated systems and painful processes.

Join us if you want to

1. Take ownership across a broad remit. You are trusted to make decisions that drive a material impact on the direction and success of Lendable from day 1
2. Work in small teams of exceptional people, who are relentlessly resourceful to solve problems and find smarter solutions than the status quo
3. Build the best technology in-house, using new data sources, machine learning and AI to make machines do the heavy lifting

About the role

As we continue to build upon the diversity of our team we are thrilled to have the opportunity to bring on board a Lead Kotlin 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.

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

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.

We believe that software engineering is more than just code – it’s about people. We believe that the best teams are made of great people. That fundamentally great software engineering is about alignment, sharing what we know and being nice to each other. When we put all this together we make software engineering better by continually improving our capabilities as a team and making our working environment a happy and productive place.

There is more to read about us and our Lendies in the engineering blog right here and if you’d like to check our reviews out on Glassdoor you can see these here.

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

What we’re looking for technically

• Strong commercial Kotlin experience
• Strong mentorship and coaching experience
• 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

What we’re looking for in a team member

• 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

Interview process

• A 30 minute introductory call with one of our engineers
• A short coding exercise to complete in your own time
• Onsite or Video Interview lasting 60-90 minutes, comprising of:
  • Introduction of the team and kind of work you could be doing daily
  • Discussion around the coding exercise you completed
  • Interactive architecture/design exercise
  • Tech project walkthrough
  • Cultural/behavioural questions to see if you’d be a good fit for Lendable
  • Questions you may have about the company, role, etc

Life at Lendable

• The opportunity to scale up one of the world’s most successful fintech companies.
• Best-in-class compensation, including equity.
• You can work from home every Monday and Friday if you wish - on the other days, those based in the UK come together IRL at our Shoreditch office in London to be together, build and exchange ideas.
• Enjoy a fully stocked kitchen with everything you need to whip up breakfast, lunch, snacks, and drinks in the office every Tuesday-Thursday.
• We care for our Lendies’ well‑being both physically and mentally, so we offer coverage when it comes to private health insurance
• We're an equal-opportunity employer and are looking to make Lendable the most inclusive and open workspace in London

Check out our blog!