Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and develop user-facing software that makes a real difference in people's lives.
- Company: Join an award-winning global organisation with a friendly culture.
- Benefits: Enjoy competitive salary, flexi-time, and generous holiday allowance.
- Why this job: Shape the future with innovative tech while enjoying remote work flexibility.
- Qualifications: Degree-level qualification and experience in C# application development required.
- Other info: Dynamic team environment with excellent career growth opportunities.
The predicted salary is between 36000 - 60000 £ per year.
Salary: Competitive Salary & Benefits
Location: Cardiff
Job Type: Permanent
Posted Date: 11/11/2025
Remote Working: Opportunity to work remotely from anywhere in Europe, with quarterly fully expensed visits to the UK site in South Wales for R&D meetings.
Shape the Future: This isn’t just another coding job; it’s a chance to make a real difference by developing software for products that improve lives across fields such as medical devices and environmental monitoring.
Flexibility & Benefits: After probation, benefit from an industry-leading flexi-time scheme, enabling you to earn an extra day off each month - work-life balance done right!
What you’ll be doing as the Senior Software Engineer:
- Join a friendly, multi-disciplined team.
- Design and implement user-facing application software architecture.
- Coordinate the application development lifecycle from conception to release.
- Support the applications, engineering, operations, sales, and support teams with the development and maintenance of existing software products.
What you will need to apply for the Senior Software Engineer position:
- A degree-level qualification or equivalent.
- Experience developing application software from scratch using C#.
- User interface design experience.
- Excellent communication skills, with experience liaising with a range of stakeholders.
- Desirable - WinForms experience.
About your remuneration package:
- Competitive salary, with a potential bonus and excellent benefits, including a salary sacrifice pension, 24 days of holidays, plus eight bank holidays.
- Other Perks: Flexi-time, an EV lease scheme, benefits such as will-writing, technology purchasing and a nursery support scheme which can save employees £1000s in childcare costs, a cash healthcare plan for routine healthcare needs, state-of-the-art spacious offices, free on-site parking, and free use of EV chargers.
About the company you’ll work with: An award-winning global organisation with four international subsidiaries, a friendly culture, and very low staff turnover rates.
Interested? Please click apply; if you don’t have an updated CV, don’t worry; we can sort that out later. If you want to discuss this before applying, please call the office and quote senior software engineer.
Senior Software Engineer in Cardiff employer: Sigma Recruitment
Contact Detail:
Sigma Recruitment Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Software Engineer in Cardiff
✨Tip Number 1
Network like a pro! Reach out to your connections in the industry, attend meetups, and engage on platforms like LinkedIn. We all know that sometimes it’s not just what you know, but who you know that can land you that dream job.
✨Tip Number 2
Prepare for those interviews! Research the company, understand their products, and be ready to discuss how your skills in C# and user interface design can make a difference. We want you to shine and show them why you’re the perfect fit!
✨Tip Number 3
Don’t forget to follow up after your interview! A quick thank-you email can go a long way in keeping you top of mind. We recommend mentioning something specific from your conversation to show you were engaged and interested.
✨Tip Number 4
Apply through our website! It’s the easiest way to get your application noticed. Plus, if you need help with your CV, we’ve got your back – just let us know and we’ll sort it out together!
We think you need these skills to ace Senior Software Engineer in Cardiff
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with C# and user interface design. We want to see how your skills match the job description, so don’t be shy about showcasing relevant projects!
Craft a Compelling Cover Letter: Your cover letter is your chance to shine! Tell us why you’re excited about this role and how you can contribute to our mission of improving lives through software. Keep it friendly and professional.
Show Off Your Communication Skills: Since you'll be liaising with various stakeholders, it’s important to demonstrate your communication prowess. Use clear language in your application and maybe even share an example of a successful collaboration.
Apply Through Our Website: We encourage you to apply directly through our website for a smoother process. If you need to update your CV, no worries – we can help you sort that out later. Just hit that 'Apply' button!
How to prepare for a job interview at Sigma Recruitment
✨Know Your Tech Inside Out
Make sure you brush up on your C# skills and any relevant frameworks like WinForms. Be ready to discuss your past projects in detail, especially those that involved user interface design. This will show that you’re not just a coder but someone who understands the bigger picture.
✨Showcase Your Communication Skills
Since the role involves liaising with various stakeholders, practice explaining complex technical concepts in simple terms. Think of examples where you’ve successfully communicated with non-technical team members or clients, as this will highlight your ability to bridge the gap between tech and business.
✨Demonstrate Your Problem-Solving Abilities
Prepare for potential technical questions or coding challenges by practising common algorithms and data structures. Be ready to walk through your thought process during problem-solving scenarios, as this will demonstrate your analytical skills and how you approach challenges.
✨Align with Their Values
Research the company’s mission and values, especially their focus on improving lives through technology. Be prepared to discuss how your personal values align with theirs and how you can contribute to their goals, particularly in areas like medical devices and environmental monitoring.
