Senior Java/Kotlin Engineer

Oliver Bernard; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Competitive benefits package

Hybrid London office culture

Job summary

Oliver Bernard is recruiting Senior Java/Kotlin Engineers for a FinTech platform in London. The role focuses on designing and building backend services in Java and Kotlin, with an emphasis on scalable, high-performance systems.

You will work in a hybrid setup, collaborating closely with product, platform and engineering teams to steer technical direction and implement modern DevOps practices. Ideal candidates bring strong Java/Kotlin experience, a solid grasp of distributed systems, and a

Qualifications

• Strong commercial experience with Java and/or Kotlin
• Experience building scalable backend systems
• FinTech, payments, trading, or regulated environments experience is a plus
• Strong software engineering fundamentals and system design skills
• Comfortable working in a collaborative agile environment

Responsibilities

• Design and build backend services in Java and Kotlin
• Work on distributed systems, APIs, and event-driven architectures
• Collaborate closely with product, platform, and engineering teams
• Contribute to technical direction and engineering best practices

Skills

Java

Kotlin

Backend systems

Agile

Tools

Spring Boot

Kafka

AWS / Cloud

SQL/NoSQL

CI/CD

Job description

Senior Java/Kotlin Engineers — FinTech | London Hybrid - 3 days a week in office

A growing fintech company is hiring experienced Java/Kotlin engineers to help build scalable, high-performance financial platforms.

Role

• Design and build backend services in Java and Kotlin
• Work on distributed systems, APIs, and event-driven architectures
• Collaborate closely with product, platform, and engineering teams
• Contribute to technical direction and engineering best practices
• Spring Boot
• Microservices
• Kafka
• AWS / Cloud infrastructure
• SQL & NoSQL databases
• CI/CD and modern DevOps tooling

What They’re Looking For

• Strong commercial experience with Java and/or Kotlin
• Experience building scalable backend systems
• FinTech, payments, trading, or regulated environment experience is a plus
• Strong software engineering fundamentals and system design skills
• Comfortable working in a collaborative agile environment

Package

• Hybrid working: 3 days per week in London office, 2 days WFH
• Competitive benefits package
• Strong engineering culture with modern tooling and autonomy