Join to apply for the Senior Java Developer role at Groupe SII

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Join to apply for the Senior Java Developer role at Groupe SII

SII Group delivers Digital Services, IT, Engineering, and Consulting to diverse industries, enabling digital transformation through our commitment to Growth, People, and CSR.

With over 16,000 professionals across 21 countries, we’re recognised as a “Great Place to Work” for fostering a high-trust culture. Our core values of Trust, Commitment, Accountability, Passion, Creativity, and Transparency drive our work package delivery, ensuring we meet and exceed client expectations as a committed partner.

Since 2016, SII UK has supported top Aerospace & Defence, Aviation, Transportation, and Finance clients, empowering digital transformation with industry-leading engineering expertise.

Let’s Tech Together is our promise to encourage innovation and teamwork. We support our engineers with development opportunities and a collaborative, inclusive environment where every voice is valued and empowered.

THE OPPORTUNITY

Working on a Defence project, on a key product used by the Royal Air Force (RAF) and Royal Navy for operational information and enhanced situational awareness.

Key Responsibilities

• Deliver fully tested, maintainable software components in line with defined task objectives
• Contribute to the production of clear and traceable design specifications for new or modified functionality
• Ensure all development complies with governance, secure coding practices, and design review procedures
• Report progress to the Software Lead and Software Engineering Delivery Manager, supporting team-level delivery goals

Essential

EXPERIENCE AND SKILLS

• Extensive experience in Java development, underpinned by strong software design principles.
• Proven track record in a senior role within a software development team, or a strong aspiration to take on such a role, demonstrating the ability to deliver high-quality software solutions.
• In-depth knowledge of configuration management, change control processes, and continuous integration tools such as Jenkins.
• Passionate about writing clean, maintainable code.

Desirable

• Frameworks and technologies: Spring, Apache Camel, JPA, Sencha, JavaScript, React; experience in web services design and development; familiarity with Agile methodologies, particularly SCRUM
• Knowledge of geospatial platforms such as Luciad or ESRI; use of continuous integration and automated testing tools
• Understanding of Human-Computer Interaction (HCI) and UX design principles
• Background in military software development
• Experience working with relational databases and proficiency in SQL

Values & Behaviours

• Customer-focused mindset.
• Strong collaboration and teamwork skills.
• Ability to innovate and think critically.
• Analytical mindset for solving complex technical problems.
• Self-motivated with a proactive approach.
• Strong interpersonal skills, capable of working in a multidisciplinary environment.
• Ability to manage workload, prioritize tasks, and work under pressure to meet deadlines.

Benefits

• Competitive Basic Salary
• 6% Employers Contribution + 6% as a salary sacrifice
• Private Medical Insurance, Life Cover and Income Protection
• 25 days holiday
• 10 days full sick pay per year
• Flexible working
• Cycle to Work & TechScheme
• Continuous professional development