Senior Java Developer

Journi; Harwell; On-site; GBP 55,000 - 75,000; Full time

Job summary

Journi in Harwell is seeking an experienced Java Developer to join a collaborative engineering team, building backend services and web applications with Java 8+ and Spring Boot.

You’ll contribute across the development lifecycle—from writing tests and debugging to refactoring and performance tuning—using Git, SQL, and modern IDEs in an Agile/Scrum environment. This role emphasizes clean code and practical problem solving.

Qualifications

• Strong commercial experience with Java 8+.
• ,
• Solid knowledge of Spring / Spring Boot.
• Good understanding of SQL and relational databases.
• Experience working with Git or another source control system.
• Comfortable working with development environments such as IntelliJ IDEA or Eclipse.
• Good understanding of software development principles and clean code practices.
• Strong analytical and problem-solving skills.
• Good communication skills and teamwork.
• Experience in Agile/Scrum environments.

Responsibilities

• Developing and maintaining applications using Java 8+ and Spring Boot.
• Building and improving backend services and web applications.
• Writing clean, maintainable, and well-tested code.
• Investigating issues and providing practical solutions.
• Collaborating with developers and stakeholders throughout the development process.
• Participating in Agile/Scrum ceremonies and practices.
• Using Git and modern development practices to keep the process smooth.

Skills

Java 8+

Spring Boot

SQL

Git

IDE (IntelliJ/Eclipse)

Clean code

Teamwork

Agile/Scrum

Tools

IntelliJ IDEA

Eclipse

Job description

Build, improve, and ship software that matters.

We’re looking for an experienced Java Developer to join a collaborative engineering team and work on products used in a fast-paced, technology-driven environment.

You’ll be involved across the development lifecycle — from building new features and improving existing applications to writing tests, troubleshooting issues, and helping keep the codebase reliable and maintainable.

What you’ll be working on

• Developing and maintaining applications using Java 8+
• Building and improving backend services and web applications with Spring / Spring Boot
• Working with relational databases and writing efficient SQL
• Contributing to both new development and the improvement of existing products
• Writing clean, maintainable, and well-tested code
• Investigating technical issues and finding practical solutions
• Collaborating with developers and other stakeholders throughout the development process
• Taking part in an Agile/Scrum way of working, including stand-ups, planning, and retrospectives
• Using version control and modern development practices to keep the development process smooth and reliable.

What we’re looking for

• Strong commercial experience with Java 8+
• Solid knowledge of Spring / Spring Boot
• Good understanding of SQL and relational databases
• Experience working with Git or another source control system
• Comfortable working with development environments such as IntelliJ IDEA, Eclipse, or similar
• Good understanding of software development principles and clean code practices
• Strong analytical and problem-solving skills
• Good communication skills and the ability to work effectively as part of a team
• Experience working in an Agile/Scrum environment

Experience with any of the following would be a plus:

• Legacy Java applications or Swing-based applications

Why join?

You’ll have the opportunity to work on a variety of applications, tackle interesting technical challenges, and continue developing your skills alongside an experienced engineering team.

We’re looking for someone who enjoys solving problems, writing good code, and seeing their work make a real difference.