Posted: 7h ago
The role
Senior Kotlin Software Engineer (Investment Banking) - London/hybrid
Scroll down the page to see all associated job requirements, and any responsibilities successful candidates can expect.
Daily rate: £600 - £1000
Duration: 6 months
Hybrid: 2 days on site
Start: ASAP
My banking client is looking for 2 experienced Senior Kotlin Software Engineers to join a cloud-hosted platform team within an investment banking environment. This is a fast-paced, front-office-facing role with a strong emphasis on high-quality engineering, reliability, and collaborative working practices.
The role offers exposure to modern engineering practices and the opportunity to work closely with business stakeholders in a demanding and high-impact environment.
Key Responsibilities
- Design, develop, test, and maintain backend services using Kotlin
- Contribute across the full software lifecycle: development, integration, and production support
- Implement and support event-driven architectures, including event sourcing and event streaming
- Work within an Agile/XP environment, utilising:
- Pair programming
- Mob programming
- Test-first development practices
- Build and maintain CI/CD pipelines and deploy services to cloud environments
- Continuously refactor code and uphold high standards of code quality and reliability
- Participate in architectural and technical design discussions
- Collaborate closely with front office stakeholders and cross-functional teams
- Deliver solutions within short timelines and respond to urgent business needs
Essential Skills & Experience
- Strong commercial experience developing production-grade Kotlin applications (non-Android)
- Proven experience with Test-Driven Development (TDD) and test-first approaches
- Hands-on experience with event-driven systems (event streaming and/or event sourcing)
- Experience with CI/CD tools and practices
- Strong background in refactoring legacy code and maintaining clean, maintainable systems
- Experience working in Agile/XP environments, ideally including mob programming
- Excellent communication skills xsngvjr with the ability to engage effectively with business/front office stakeholders
Desirable Skills & Experience
- Prior experience in investment banking or financial services, particularly front office systems
- Experience with cloud platforms (AWS, GCP, or Azure)
- Familiarity with containerisation technologies (Docker, Kubernetes)
- Experience with Kafka or similar messaging/event platforms
- Understanding of distributed systems design and immutable event patterns
- Experience with observability, monitoring, and incident response tools
- Exposure to low-latency or high-availability systems
*Rates depend on experience and client requirements
