Java Developer-Kotlin

Ubique Systems; Burgess Hill; Remote; GBP 50,000 - 70,000; Full time

Job summary

A leading software development company in the UK is looking for a Java with Kotlin Developer to design and maintain backend services. In this role, you will develop high-quality code using modern frameworks, collaborate with product owners and engineers, as well as mentor junior colleagues. Ideal candidates will have strong experience in Java and Kotlin, solid knowledge of Spring Framework, and excellent communication skills. This position offers a dynamic work environment focused on growth and collaboration.

Qualifications

• Strong experience in Java (8+).
• Solid practical experience in Kotlin.
• Experience with Spring Framework (Spring Boot, Spring MVC, etc.).
• Good understanding of RESTful API design and microservices architecture.
• Familiarity with SQL databases like PostgreSQL or MySQL.
• Knowledge of version control with Git.
• Experience with unit/integration testing frameworks like JUnit or MockK.
• Ability to write effective technical documentation.
• Excellent communication and teamwork skills.

Responsibilities

• Develop and enhance backend systems using Java and Kotlin.
• Write clean, maintainable, and efficient code following best practices.
• Collaborate with DevOps to support CI/CD pipelines.
• Participate in architectural discussions and suggest improvements.
• Troubleshoot, debug, and resolve performance issues.
• Review code and mentor junior engineers.
• Contribute to API design and integration with frontend services.

Skills

Java (8+)

Kotlin

Spring Framework

RESTful API Design

SQL Databases

Version Control (Git)

Testing Frameworks

Technical Documentation

Communication Skills

Teamwork

Job description

As a Java with Kotlin Developer, you will design, develop, and maintain backend services and applications using modern Java and Kotlin frameworks. You’ll collaborate with product owners, architects, and fellow engineers to deliver high-quality code, participate in code reviews, and improve engineering standards.

Key Responsibilities

• Develop and enhance backend systems using Java and Kotlin
• Write clean, maintainable, and efficient code following best practices
• Collaborate with DevOps to support CI/CD pipelines and automated testing
• Participate in architectural discussions and suggest improvements
• Troubleshoot, debug, and resolve performance issues
• Review code and mentor junior engineers
• Contribute to API design and integration with frontend services

Required Skills & Experience

• Strong experience in Java (8+)
• Kotlin solid practical experience
• Experience with Spring Framework (Spring Boot, Spring MVC, etc.)
• Good understanding of RESTful API design and microservices architecture
• Familiarity with SQL databases (e.g., PostgreSQL, MySQL)
• Knowledge of version control systems (e.g., Git)
• Experience with unit/integration testing frameworks (e.g., JUnit, MockK)
• Ability to write effective technical documentation
• Excellent communication and teamwork skills