Senior Kotlin Engineer (Event Streaming/Sourcing) - London
Posted 1 week ago by Salt
£1,000 Per day
Undetermined
Hybrid
London; City of London; East London; Central London; South East London; West London; Canary Wharf; South West London; North London; Greenwich; Stratford
Summary: The Senior Kotlin Software Engineer role focuses on developing and maintaining backend services within a cloud-hosted platform for an investment banking client. This position emphasizes high-quality engineering practices and collaboration with business stakeholders in a fast-paced environment. The role requires strong expertise in Kotlin and event-driven architectures, along with experience in Agile methodologies. Candidates will engage in the full software lifecycle, from development to production support, while adhering to high standards of code quality.
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 and mob programming
- Utilise 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
Key Skills:
- 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 with the ability to engage effectively with business/front office stakeholders
Salary (Rate): £1000 daily
City: London
Country: United Kingdom
Working Arrangements: hybrid
IR35 Status: undetermined
Seniority Level: undetermined
Industry: IT
Senior Kotlin Software Engineer (Investment Banking) - London/hybrid
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 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