Senior Kotlin Developer (Java, Kafka, AWS) – FinTech
London (Hybrid: 3 days onsite)
Up to £110,000 per year + benefits
About the Company
We’re a fast-growing FinTech building modern, cloud-native platforms that power real-time financial services used by thousands of customers daily. Our engineering culture is collaborative, pragmatic, and focused on delivering high-quality, scalable systems.
The Role
We’re looking for a Senior Kotlin Developer to help design and build resilient backend services that process high-volume financial data in real time. You’ll work closely with product, platform, and data teams to deliver robust distributed systems in a cloud-first environment.
This is a hybrid role based in London (3 days per week in the office)
What You’ll Be Doing
* Designing and building microservices using Kotlin and Java
* Deploying and operating services on AWS
* Improving system performance, reliability, and scalability
* Contributing to architecture decisions and best practices
* Mentoring engineers and supporting a strong engineering culture
* Kotlin, Java (Spring Boot / Micronaut or similar)
* Apache Kafka / event-driven architecture
* AWS (EKS, Lambda, S3, RDS, DynamoDB, or similar)
* Observability tooling (monitoring, logging, tracing)
* Strong commercial experience with Kotlin and Java backend development
* Experience building distributed or event-driven systems with Kafka
* Strong understanding of testing, clean code, and engineering best practices
Nice to Have
* Experience in FinTech, payments, or regulated environments
* Infrastructure as Code (Terraform, CloudFormation)
What’s On Offer
* Salary up to £110,000
* Hybrid working (3 days London office)
* Bonus + equity options
* Modern, collaborative engineering culture
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