Senior Java / Kotlin Engineers - Fintech
Hybrid – 3 days/week in office - London)
We’re a fast-growing fintech company based in London, building high-performance, scalable platforms that power modern financial services. We’re looking for a Senior Java/Kotlin Engineers to play a key role in designing and delivering mission-critical systems used at scale.
This is a hands-on senior role with real technical influence and the opportunity to mentor others and shape engineering best practices.
What you’ll be doing
* Designing, building, and maintaining high-throughput backend services
* Working with event-driven and distributed systems at scale
* Contributing to architectural decisions and technical direction
* Writing clean, testable, production-grade code
* Collaborating closely with product, platform, and DevOps teams
* Mentoring engineers and providing technical leadership (formally or informally)
Tech stack
* Java & Kotlin (More Serverside Kotlin, the better!)
* Spring Boot
* Kafka
* AWS (ECS/EKS, Lambda, S3, etc.)
* Microservices & event-driven architecture
What we’re looking for
* 8+ years of commercial software engineering experience
* Strong background in Java, with exposure to or interest in Kotlin
* Solid experience building backend systems using Spring Boot
* Experience working with Kafka or similar messaging/event platforms
* Strong cloud experience, ideally AWS
* Good understanding of distributed systems, scalability, and reliability
* Leadership experience (mentoring, leading projects, or guiding technical decisions) is highly desirable
Nice to have
* Fintech or regulated-environment experience
* Experience influencing architecture or platform strategy
* A pragmatic approach to balancing delivery with technical excellence