Senior Java Engineer in Belfast

Energy Jobline ZR; Belfast; On-site; GBP 50,000 - 70,000; Full time

Job summary

A technology company is seeking a Senior Java Engineer to design and develop backend applications. This role involves collaboration with various teams and mentoring junior developers. Ideal candidates have over 5 years of Java experience and solid knowledge of microservices and cloud platforms. Flexible working options and a competitive salary are offered.

Benefits

Flexible working options

Professional development resources

Competitive salary and benefits

Qualifications

• 5+ years of professional Java development experience.
• Strong knowledge of Java 8+ features and ecosystem.
• Excellent communication skills and ability to work effectively in a team.

Responsibilities

• Design, develop, test, and maintain backend Java applications.
• Collaborate with cross‑functional teams to define system requirements.
• Mentor and support junior and mid‑level developers.

Skills

Java development experience

Spring Boot

Microservices architecture

Cloud platforms (AWS, Azure, GCP)

CI/CD pipelines

Agile methodologies

Tools

Docker

Kubernetes

Hibernate

Job description

Energy Jobline is the largest and fastest growing global Energy Job Board and Energy Hub. We have an audience reach of over 7 million energy professionals, 400,000+ monthly advertised global energy and engineering jobs, and work with the leading energy companies worldwide.

We focus on the Oil & Gas, Renewables, Engineering, Power, and Nuclear markets as well as emerging technologies in EV, Battery, and Fusion. We are committed to ensuring that we offer the most exciting career opportunities from around the world for our jobseekers.

Job Description

Senior Java Engineer

About Our Client: Our client is a fast-growing, innovative technology company delivering scalable and high-performance software solutions in a competitive digital marketplace. They are committed to empowering their teams with cutting‑edge technology and a culture of collaboration and continuous learning.

The Role: As a Senior Java Engineer, you will be an integral part of the software development life cycle, designing and building robust, scalable backend applications.

You will collaborate closely with product managers, frontend teams, and other engineers to deliver features that drive customer value and operational excellence. How do you approach designing clean, maintainable code while balancing performance and scalability? This role demands a strong problem solver dedicated to technical craftsmanship and mentoring junior engineers.

Key Responsibilities

• Design, develop, test, and maintain backend Java applications and microservices.
• Collaborate with cross‑functional teams to define system requirements and architecture.
• Participate in code reviews to ensure quality, consistency, and best practices.
• Troubleshoot and optimize performance, scalability, and reliability issues in production.
• Drive continuous improvement in software engineering processes and tools.
• Mentor and support junior and mid‑level developers, fostering knowledge sharing and team growth.
• Write and maintain comprehensive technical documentation.

About You

• 5+ years of professional Java development experience, preferably in large‑scale distributed systems.
• Strong knowledge of Java 8+ features and ecosystem, including Spring Boot, Hibernate, and RESTful APIs.
• Experience with microservices architecture, containerization (Docker/Kubernetes), and cloud platforms (AWS, Azure, or GCP).
• Solid understanding of relational and NoSQL databases.
• Proficient in CI/CD pipelines, automated testing and monitoring tools.
• Experience with Agile methodologies and collaborative development environments.
• Excellent communication skills and ability to work effectively in a team.
• Passionate about mentoring and technical excellence.

Why Join

Play a key role in building impactful software products that serve a global user base. Join a collaborative team culture focused on innovation and mentorship. Access flexible working options and professional development resources.

Competitive salary and benefits reflective of your skills and experience. If you have any further questions or want to hear more about the role, simply apply or contact Brendan McCrory directly on LinkedIn or WhatsApp.

If you are interested in applying for this job please press the Apply Button and follow the application process. Energy Jobline wishes you the very best of luck in your next career move.