At a Glance
- Tasks: Lead the design and development of secure Java applications in a collaborative environment.
- Company: Join HM Revenue and Customs, a digital leader in the UK.
- Benefits: Enjoy flexible working, generous leave, and a strong pension scheme.
- Other info: Be part of a diverse team with excellent career growth opportunities.
- Why this job: Make a real impact with advanced technologies while growing your career.
- Qualifications: Proven experience in Java development and team leadership.
The predicted salary is between 45544 - 55157 £ per year.
Location: Various locations across the UK.
Salary: 45,544 - 55,157 per year
Employment: Flexible
Category: IT
Posted: 2026-08-18
Valid to: 2026-09-02
Employer: HM Revenue and Customs
Job summary
Discover a career in your hands at HMRC. We are committed to creating a great place to work for all our colleagues; an inclusive and respectful environment that reflects the diversity of the society we serve. We want to maximise the potential of everyone who chooses to work for us and we offer a range of flexible working patterns and support to make a fulfilling career at HMRC accessible to you.
At HMRC, we are already one of the most digital organisations in the UK. Our IT operation is huge, serving 50 million customers and supporting over 60 thousand colleagues.
As a Senior Java Developer within the Java Development Guild in CDIO Borders & Trade, you will be responsible for leading the design and development of clean, secure code following a test-driven approach, as well as maintenance and continuous improvement of Java-based services and applications across both legacy and modern platforms.
Key responsibilities include:
- Designing secure, scalable, resilient and supportable solutions with strong engineering controls and practices.
- Writing, reviewing, and assuring clean, reusable, testable and secure code, using TDD and quality-focused development practices.
- Supporting systems integration, interface design and testing across multiple systems and environments.
- Leading or contributing to code reviews, design reviews, technical assurance and development governance.
- Providing Intelligent Client capability on supplier-led and mixed-delivery projects.
- Continuous improvement of engineering practices, tools, processes, standards and service robustness.
Essential Criteria:
- Significant experience designing, developing, supporting and maintaining complex Java-based services and applications.
- Strong experience building APIs, microservices and integrated services using Java, REST, Spring Boot/Cloud, Redis, Hibernate.
- Experience using modern CI/CD tooling and databases.
- Strong analytical and problem-solving skills.
- Experience mentoring, coaching or line managing others.
Desirable Criteria:
- Awareness of cloud service models and infrastructure-as-code practices.
- Working knowledge of Linux or other Unix-like operating systems.
- Experience with JavaScript or TypeScript UI development.
Benefits include a generous leave allowance, pension contributions, family-friendly policies, and personal support.
HMRC operates both Flexible and Hybrid Working policies, allowing you to balance your work and personal commitments.
Senior Developer (Java) in Cardiff employer: United Kingdom Government
The Home Office is an exceptional employer, offering a dynamic work environment in the heart of the UK, with opportunities for flexible working arrangements. Employees benefit from a robust Civil Service pension scheme, generous annual leave, and a strong commitment to professional development, ensuring that you can grow your skills while contributing to critical national infrastructure projects. Join a diverse team of over 200 engineers in a collaborative culture that values innovation and continuous improvement.
StudySmarter Expert Advice🤫
We think this is how you could land Senior Developer (Java) in Cardiff
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at United Kingdom Government or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to United Kingdom Government.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like United Kingdom Government.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like United Kingdom Government that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Senior Developer (Java) in Cardiff
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at United Kingdom Government.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at United Kingdom Government and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at United Kingdom Government
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If United Kingdom Government uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
