Contract Software Engineer (Java & Kotlin)

Senior Java & Kotlin Backend EngineerLocation: London (Hybrid - Wednesday office attendance required) Contract: Initial 2 months IR35: Outside IR35 Start Date: ASAP The RoleWe're working with a leading technology organisation seeking an experienced Senior Java & Kotlin Backend Engineer to join their engineering team on an initial two-month contract. This role offers the opportunity to contribute to greenfield backend development, building scalable, cloud-native microservices within a modern engineering environment. You'll work alongside cross-functional teams to design, develop and deliver high-quality backend solutions that are secure, reliable and built for scale. Key Responsibilities • Design, develop and maintain backend services using Java and Kotlin. • Build and enhance RESTful APIs within a microservices architecture. • Develop secure, scalable and high-performance applications. • Collaborate with Product Managers, Engineers and technical stakeholders to deliver new features. • Participate in code reviews and contribute to engineering best practices. • Improve system reliability, performance and scalability. • Work with cloud-native technologies and modern deployment practices. • Support production systems and contribute to continuous improvement initiatives. Essential Skills & Experience • Strong commercial experience with Java and Kotlin. • Proven experience developing applications using Spring Boot. • Strong understanding of microservices architecture. • Experience designing and building REST APIs. • Commercial experience with Kafka or similar messaging technologies. • Experience with PostgreSQL. • Experience working with AWS cloud services. • Hands-on experience with Docker and containerised applications. • Strong understanding of software engineering best practices, testing and CI/CD. • Excellent communication and problem-solving skills. Desirable • Experience with Gradle. • Experience working within Agile development teams. • Knowledge of distributed systems and event-driven architectures. Contract Details • Initial 2-month contract. • Outside IR35. • Hybrid working with office attendance in London every Wednesday. • Immediate start available. Spectrum IT Recruitment (South) Limited is acting as an Employment Business in relation to this vacancy.