Senior Kotlin/JVM Engineer
- Level
- Senior
- Work type
- Hybrid · London
Not stated in the posting: salary, visa.
Open. First seen 2 October 2026.
About the role
Lendable's standard text
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:
- One of the UK’s most exciting unicorns with a team of over 800 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
- Take ownership: you are trusted to make decisions that drive a material impact on the direction and success of Lendable from day 1
- Work in small teams of exceptional people: Lendies are relentlessly resourceful. We challenge the status quo to solve problems and find smarter solutions
- Build the best technology in-house: we use 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 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. Our current tech team have already built next-generation lending, credit card and auto-finance products alongside our Superapp. There is more to build as we scale.
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.
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 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
What kind of person you’ll need to be
- 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
Life at Lendable
- Winning team: the opportunity to scale up one of the world’s most successful fintech companies
- Flexible 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-sites
- Socials & connection: opportunities and events to come together, socialise, and get to know each other beyond the office walls
- Health coverage: support for your physical and mental wellbeing, including private health cover
- Retirement & savings: long-term financial wellbeing through retirement savings plans
- Employee referral programme: earn a competitive bonus when you refer successful new team members
- Office meals & snacks: enjoy a fully stocked kitchen, plus complimentary lunches prepared by in-house chefs on in-office days at select locations
- Sustainable commuting: cycle-to-work and electric vehicle salary sacrifice schemes available in select locations
Lendable's standard text
Please note: The availability and details of specific benefits vary by location and role. For more information, please speak to your Talent Partner.
Check out our blog!
What this role asks for
Particular to this role
Agile · Gradle · GraphQL · JUnit · Java · NoSQL · React · React Native
Rare in Lendable's other 39 open postings.
Standard for mobile roles
Kotlin
Common in mobile postings at any company.
In most of Lendable's ads
Machine Learning
Named in most of its open postings, whatever the role.
72% of this description is written for the role. The rest is Lendable's standard text, folded away below.
Read against Lendable's other open postings on this site.
The team: SuperApp Engineering HIRES STEADILY
This role is one of 4 open in SuperApp Engineering. 2 were posted in the last 30 days and the oldest in September: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
AWS (4 of 4), CI/CD (4 of 4), Docker (4 of 4), GitHub (4 of 4), GraphQL (4 of 4), Kotlin (4 of 4), Kubernetes (4 of 4)
OTHER ROLES ON THIS TEAM
- Senior Mobile Quality Engineer posted Sep 29
- Staff Quality Engineer - Mobile posted Sep 29
- Senior Kotlin Engineer posted Sep 23
From the team and dates on Lendable's own job board.
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