Senior Kotlin Engineer (London)

Company: Lendable
Apply for the Senior Kotlin Engineer (London)
Location: London
Job Description:

Job Description

hackajob is collaborating with Lendable to connect them with exceptional professionals for this role.

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About Lendable

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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:

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  • nOne of the UK’s newest unicorns with a team of just over 700 peoplen
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  • nAmong the fastest-growing tech companies in the UKn
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  • nProfitable since 2017n
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  • nBacked by top investors including Balderton Capital and Goldman Sachsn
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  • nLoved by customers with the best reviews in the market (4.9 across 10,000s of reviews on Trustpilot)n

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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.

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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.

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Join us if you want ton

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  • nTake 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 1n
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  • nWork in small teams of exceptional people, who are relentlessly resourceful to solve problems and find smarter solutions than the status quon
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  • nBuild the best technology in-house, using new data sources, machine learning and AI to make machines do the heavy liftingn

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About the role

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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 engineer to a newly forming pod. 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, and they’re at it again with brand new product launches this year.

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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.

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There’s a lot to do, from building and integrating new API’s to help build out our new collections function to creating new internal tools and supporting our expansion of new products and supporting services in the US.

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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.

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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.

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Our Tech Stack

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Backend

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  • nKotlin 1.7.20n
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  • nAWSn
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  • nGraphQL (it would be nice if you were familiar with this but it’s not a deal breaker)n
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  • nPostgresn
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  • nRabbitMQn
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  • nDockern
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  • nKubernetesn

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Frontend

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  • nReact & React Native, TypeScript, MobX, Redux, Stylus and SASSn

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Other

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  • nWe build our Kotlin projects using Gradle and GitHub Actions, deploying to production as soon as we finish a featuren
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  • nWe use JUnit Jupiter, Kotest and TestContainers for automated testingn

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What technical skills you’ll need to have

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  • nStrong commercial Kotlin experiencen
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  • nAn ability to write simple, clean coden
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  • nExperience and understanding of databases; relational databases are a must, NoSql would be nice toon
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  • nBe able to quickly understand complex, financial business domainsn
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  • nUnderstand different software architectures rapidlyn
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  • nUnderstands abstraction and interpolationn
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  • nAble to write comprehensive, automated tests at all levels of the pyramidn
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  • nUnderstanding of the Kanban agile methodology; not a deal breaker if you don’tn

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What kind of person you’ll need to be

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  • nSomeone who can get along with others and build relationshipsn
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  • nSomeone who wants to continually learn, improve and collaboraten
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  • nSomeone who can solve problems on their own but also knows when to go to their peers for helpn
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  • nSomeone who is a rational thinker and is aware of the ‘why’ behind the way they do thingsn
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  • nSomeone who is a pragmatist who can sensibly weigh the tradeoffs between code quality and deliveryn

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Interview process

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  • nA 30 minute introductory call with one of our engineersn
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  • nA short coding exercise to complete in your own timen
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  • nOnsite or Video Interview lasting 60-90 minutes, comprising of:n
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    • nIntroduction of the team and kind of work you could be doing dailyn
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    • nDiscussion around the coding exercise you completedn
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    • nInteractive architecture/design exercisen
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    • nTech project walkthroughn
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    • nCultural/behavioural questions to see if you’d be a good fit for Lendablen
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    • nQuestions you may have about the company, role, etcn

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Check out our blog

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We also have an engineering blog where we have written in more detail how we work in the engineering team.

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Life at Lendable

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  • nThe opportunity to scale up one of the world’s most successful fintech companiesn
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  • nBest-in-class compensation including equityn
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  • nYou 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 ideasn
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  • nOur in-house chef prepares fresh, healthy lunch in the office every Tuesday-Thursdayn
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  • nEncouraged and sponsored personal and team growth through our training budget, 10% time for all engineers and active guildsn

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Life at Lendablen

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  • nWinning team: the opportunity to scale up one of the world’s most successful fintech companiesn
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  • nFlexible working: flexible approach tailored to each role. Hybrid roles require three days in-office weekly; fully remote roles include regular opportunities for in-person connection through socials and off-sitesn
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  • nSocials & connection: opportunities and events to come together, socialise, and get to know each other beyond the office wallsn
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  • nHealth coverage: support for your physical and mental wellbeing, including private health covern
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  • nRetirement & savings: long-term financial wellbeing through retirement savings plansn
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  • nEmployee referral programme: earn a competitive bonus when you refer successful new team membersn
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  • nOffice meals & snacks: enjoy a fully stocked kitchen, plus complimentary lunches prepared by in-house chefs on in-office days at select locationsn
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  • nSustainable commuting: cycle-to-work and electric vehicle salary sacrifice schemes available in select locationsn

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Please note: The availability and details of specific benefits vary by location and role. For more information, please speak to your Talent Partner.

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Check out our blog!

Posted: July 9th, 2026