At a Glance
- Tasks: Join us to design and deliver innovative software solutions using the latest .NET technologies.
- Company: Advanced Secure Technologies, a fast-growing company focused on document fraud protection.
- Benefits: Competitive salary, performance bonuses, 25 days holiday, and training budgets.
- Other info: Enjoy a fun culture with office events and opportunities for career growth.
- Why this job: Make a real impact by shaping enterprise-scale products in a collaborative environment.
- Qualifications: 7+ years of experience in C# .NET and strong problem-solving skills.
The predicted salary is between 55000 - 65000 £ per year.
Location: Cardiff (Office-based, 5 days a week)
Salary: £55,000 - £65,000 base (DOE) + up to £3,000 annual bonus
Start Date: Immediate start available, but willing to wait for the right candidate.
Are you an accomplished senior software developer with a proven track record in .NET? Join us at an exciting time in our journey, where you'll help shape the future of our products as we modernise our enterprise applications with latest .NET technologies and event-driven SaaS microservice architecture to deliver enterprise-scale solutions. At Advanced Secure Technologies, we're a fast-growing, innovative company on a mission to protect organisations from document fraud through cutting-edge security solutions. Based on site in St Mellons, Cardiff, we’re expanding and need another skilled senior developer to help us scale.
What you'll do:
- Play a key role in the design and delivery of new features and platform improvements using .NET 10 and other modern technologies, contributing as a senior individual contributor within one of our collaborative engineering teams.
- Share ideas, solve complex technical problems, and help shape the future technical direction, architecture and engineering standards of our products.
- Take ownership of team sprint delivery, facilitating sprint activities, coordinating priorities, resolving blockers and helping ensure releases and wider project deliverables remain on track and delivered successfully.
- Support and mentor other developers through technical guidance, collaboration, code reviews and sharing best practice, while also supporting their career development and contributing to a collaborative, high‑performing engineering culture.
Requirements
What you bring:
- Proven experience operating successfully at senior developer/engineer level within commercial software teams, making strong hands‑on technical contributions as a senior individual contributor.
- 7+ years' commercial experience delivering modern C# .NET solutions.
- Strong commitment to engineering best practices, including writing clean, maintainable and testable code, with experience applying unit and integration testing standards within modern development teams.
- Experience of Clean Architecture or similar modern approaches, such as hexagonal or onion architecture, beyond traditional N-tier designs.
- Strong problem‑solving skills, attention to detail, excellent organisation and clear communication skills, with the ability to collaborate effectively across diverse engineering teams and the wider business.
- Experience mentoring, guiding and supporting other developers, helping them grow through collaboration, technical guidance and knowledge sharing.
Bonus points for:
- Working with enterprise‑scale software, microservices, event‑driven architecture or SaaS product development.
- Experience with TDD, DDD, secure coding/OWASP practices, Azure DevOps, CI/CD pipelines and cloud platforms like Azure.
- Experience with some of the tech we use: .NET Blazor, EF Core, SQL, Redis, Elasticsearch, RabbitMQ, Docker, Kubernetes or Blockchain.
- Experience using AI tools to improve developer effectiveness, team productivity and the quality or speed of software delivery.
Benefits
What we offer:
- Competitive salary £55,000 - £65,000 (DOE) + monthly performance bonus.
- A clear career pathway through our Senior Developer grades and beyond with mentoring and skill development support.
- 25 days holiday + Bank Holidays.
- Training and development time, plus training budgets for courses/exams.
- Free gym, secure parking, free eyecare, and a fully stocked kitchen.
- Access to PerkBox significant retailer discounts.
- Free Private online GP.
- Employee Assistance Programme including specialist clinical support.
- Company car and cycle‑to‑work schemes.
- A fun, supportive culture with birthday treats and epic office events.
Interviews
Our interview process:
- Introductory call (45m): A chance for us to get to know you, and for you to get to know us. We'll cover your experience, a few competency‑based questions, and some light technical discussion.
- Technical assessment (90m): Technical questions and discussion around your approach and problem‑solving, includes a 30‑minute practical coding exercise focused on real‑world problem solving.
- Final conversation (20m): Meet our Managing Director for an informal chat about the role, the team, your potential impact, and the growth opportunity available to you.
Location
Onsite, Eastern Business Park, St Mellons, Cardiff, Wales. Min Hours 37.5hrs per week, 8.30am to 5pm Monday to Friday, with up to one hour for lunch.
If you're looking for a senior engineering role where you can influence technical direction, contribute to modernisation work, and help shape enterprise‑scale products, apply now - we can't wait to see what you'll bring!
On Site Working
We're an office‑based team because our culture thrives on collaboration and hands‑on support, especially as we grow quickly and onboard new team members. While we don't offer fully remote or fixed hybrid work, we're flexible when life happens - ad hoc home working is always an option.
Diversity & Inclusion
Advanced Secure Technologies is an equal opportunity employer, proud of our ongoing efforts to foster diversity and inclusion. We welcome applicants from all backgrounds and process your personal data in accordance with our Privacy Notice.
Senior Software Developer in Cardiff employer: Advanced Secure Technologies | B Corp™
At Advanced Secure Technologies, we pride ourselves on being an excellent employer, offering a vibrant work culture that fosters collaboration and innovation in the heart of Cardiff. With competitive salaries, a clear career progression pathway, and a strong commitment to employee development, we empower our team members to grow while enjoying a range of benefits including generous holiday allowances, training budgets, and a supportive environment that celebrates achievements. Join us to be part of a mission-driven company where your contributions will directly impact the future of enterprise-scale solutions.
Contact Details:
Advanced Secure Technologies | B Corp™ Recruitment Team
StudySmarter Expert Advice🤫
We think this is how you could land Senior Software Developer in Cardiff
✨Tip Number 1
Get your networking game on! Reach out to current employees at Advanced Secure Technologies on LinkedIn. A friendly chat can give you insider info and might just get your application noticed.
✨Tip Number 2
Prepare for the technical assessment by brushing up on your .NET skills. Work on real-world coding problems and practice explaining your thought process. We want to see how you tackle challenges!
✨Tip Number 3
Show off your mentoring experience! During interviews, share specific examples of how you've helped other developers grow. It’s a big plus for us when we see candidates who lift others up.
✨Tip Number 4
Don’t forget to apply through our website! It’s the best way to ensure your application gets into the right hands. Plus, it shows you’re serious about joining our team.
We think you need these skills to ace Senior Software Developer in Cardiff
Some tips for your application 🫡
Tailor Your CV:Make sure your CV highlights your experience with .NET and any relevant technologies mentioned in the job description. We want to see how your skills align with what we're looking for, so don’t be shy about showcasing your achievements!
Craft a Compelling Cover Letter:Your cover letter is your chance to tell us why you're the perfect fit for this role. Share your passion for software development and how you can contribute to our mission at Advanced Secure Technologies. Keep it engaging and personal!
Showcase Your Problem-Solving Skills:In your application, highlight specific examples where you've tackled complex technical challenges. We love seeing how you approach problems and the solutions you've implemented, especially in a team setting.
Apply Through Our Website:We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for the role. Plus, it shows us you’re keen on joining our team!
How to prepare for a job interview at Advanced Secure Technologies | B Corp™
✨Know Your .NET Inside Out
Make sure you brush up on your .NET knowledge, especially the latest features in .NET 10. Be prepared to discuss how you've applied these technologies in your previous roles and be ready to tackle technical questions that test your understanding of modern C# solutions.
✨Showcase Your Problem-Solving Skills
During the technical assessment, focus on demonstrating your problem-solving approach. Think aloud as you work through the coding exercise, explaining your thought process and how you would tackle real-world challenges. This will show them your analytical skills and how you handle complex issues.
✨Highlight Your Mentorship Experience
Since mentoring is a key part of the role, come prepared with examples of how you've supported other developers in the past. Share specific instances where your guidance helped someone grow or overcome a challenge, showcasing your leadership and collaborative spirit.
✨Prepare for Cultural Fit Questions
As they value a fun and supportive culture, think about how you can contribute to their team dynamics. Be ready to discuss your experiences in collaborative environments and how you foster a positive atmosphere, as well as any fun anecdotes that reflect your personality.
