Developer jobs in United Kingdom
BI Developer | West Sussex (3 days) | up to 70,000
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Job summary
A leading financial services organisation is seeking an experienced Java Developer with strong Kotlin experience for a 6-month contract role. The successful candidate will work on designing and delivering scalable, high-quality backend systems. Responsibilities include building microservices and contributing to robust API development within a collaborative Agile team. The position is hybrid, requiring 2-3 days of on-site presence in West Sussex.
Qualifications
- 5+ years of commercial software development experience.
- Strong expertise in Java and hands-on Kotlin development.
- Experience building backend services and APIs.
Responsibilities
- Design, develop, and maintain backend services using Java and Kotlin.
- Build and enhance microservices-based architectures.
- Develop clean, scalable, and well-tested code.
Skills
Tools
Contract: 6 months (Inside IR35) - Extendable
Location: Hybrid - West Sussex (2-3 days per week on-site)
Rate: DOE
Client: Leading Financial Services Organisation
We are working with a leading financial services client who is looking to engage an experienced Java Developer with strong Kotlin experience to join a high-performing engineering team. This is a critical contract role contributing to the design and delivery of scalable, high-quality backend systems within a complex enterprise environment. The successful contractor will be working on modernising platforms, building robust APIs, and contributing to solutions that operate at scale in a regulated environment.
- Design, develop, and maintain backend services using Java and Kotlin
- Build and enhance microservices-based architectures
- Develop clean, scalable, and well-tested code following best engineering practices
- Collaborate closely with product managers, architects, and other engineers
- Contribute to system design discussions and technical decision-making
- Ensure performance, security, and reliability of applications
- Work within Agile/Scrum delivery teams
- 5+ years of commercial software development experience
- Strong expertise in Java and hands-on Kotlin development
- Experience building backend services and APIs
- Solid understanding of microservices architectures
- Experience with Spring / Spring Boot
- Familiarity with CI/CD pipelines and modern development practices
- Strong problem-solving skills and ability to work in complex environments
- Previous experience in financial services or regulated industries
- Cloud experience (AWS, Azure, or GCP)
- Experience with containerisation (Docker, Kubernetes)
- Knowledge of event-driven architectures (Kafka, messaging systems)
- Initial 6-month contract, with strong likelihood of extension
- Inside IR35
- Hybrid working: 2-3 days per week on-site
- Competitive day rate dependent on experience
* The salary benchmark is based on the target salaries of market leaders in their relevant sectors. It is intended to serve as a guide to help Premium Members assess open positions and to help in salary negotiations. The salary benchmark is not provided directly by the company, which could be significantly higher or lower.