At a Glance
- Tasks: Lead and mentor developers while building scalable web and mobile applications.
- Company: Join a fast-moving engineering team in a flexible, hybrid environment.
- Benefits: Competitive salary, perks, healthcare options, and a focus on wellbeing.
- Other info: Great opportunity for career growth in a collaborative culture.
- Why this job: Work on impactful projects using cutting-edge technologies like AI and cybersecurity.
- Qualifications: Strong full stack JavaScript experience and mentoring skills required.
The predicted salary is between 60000 - 80000 € per year.
Salary: £60,000 - £80,000 base salary plus benefits, perks, and healthcare options
Location: Cardiff - Hybrid
We're looking for a Senior Full Stack JavaScript Developer to join a fast-moving engineering team building modern web and mobile applications that deliver real impact. You'll lead technical delivery, mentor engineers, and help shape scalable, secure solutions across projects involving cutting-edge technologies including AI, cybersecurity, and autonomous systems.
What you'll do:
- Lead and mentor developers, driving engineering best practices
- Build scalable web & mobile apps using JavaScript, Node.js, React/Angular/Vue
- Design and develop robust front-end and back-end systems
- Apply TDD and modern development practices
- Collaborate with architects, clients, and cross-functional teams
- Use AI tools (e.g. GitHub Copilot) to enhance delivery and quality
What we're looking for:
- Strong full stack JavaScript experience (Node.js + modern frameworks)
- Experience with Express.js, Nest.js, or Hapi.js
- Front-end expertise in React, Angular, Vue or similar (including Remix.js)
- Strong HTML5, CSS3, JavaScript (ES6+), TypeScript skills
- Experience in a senior/lead role with mentoring responsibility
- Passion for building scalable, high-quality software
Why join us? Work on meaningful, high-impact projects in a flexible, hybrid environment where innovation, collaboration, and wellbeing are genuinely prioritised. If you're ready to take the lead on exciting engineering challenges, we'd love to hear from you.
Senior JavaScript Developer in Cardiff employer: 83zero Limited
Join a dynamic team in Cardiff as a Senior Full Stack JavaScript Developer, where you'll not only lead and mentor fellow engineers but also work on impactful projects that leverage cutting-edge technologies. Our hybrid work culture prioritises innovation and collaboration, offering you the flexibility to thrive while enjoying comprehensive benefits and opportunities for professional growth in a supportive environment.
StudySmarter Expert Advice🤫
We think this is how you could land Senior JavaScript Developer in Cardiff
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, attend meetups, and engage in online communities. You never know who might have the inside scoop on job openings or can refer you directly.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those using JavaScript, Node.js, and modern frameworks. This is your chance to demonstrate your expertise and passion for building scalable applications.
✨Tip Number 3
Prepare for interviews by brushing up on technical questions and coding challenges. Practice with platforms that focus on JavaScript and full stack development to ensure you're ready to impress during those crucial moments.
✨Tip Number 4
Don't forget to apply through our website! We love seeing candidates who are genuinely interested in joining our team. Tailor your application to highlight your leadership experience and passion for mentoring others in the field.
We think you need these skills to ace Senior JavaScript Developer in Cardiff
Some tips for your application 🫡
Tailor Your CV:Make sure your CV reflects the skills and experiences that match our Senior Full Stack JavaScript Developer role. Highlight your expertise in JavaScript, Node.js, and any frameworks you've worked with, as we want to see how you can contribute to our team.
Craft a Compelling Cover Letter:Your cover letter is your chance to show us your personality and passion for software development. Share specific examples of projects you've led or mentored on, and explain why you're excited about working with cutting-edge technologies at StudySmarter.
Showcase Your Projects:If you've got a portfolio or GitHub profile, make sure to include it! We love seeing real-world applications of your skills. Highlight any projects that demonstrate your ability to build scalable web and mobile apps, especially those using AI tools.
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 to join the StudySmarter family!
How to prepare for a job interview at 83zero Limited
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in the technologies mentioned in the job description, especially JavaScript, Node.js, and frameworks like React or Angular. Brush up on your knowledge of Express.js or Nest.js too, as these will likely come up during technical discussions.
✨Showcase Your Leadership Skills
Since this role involves mentoring, be prepared to discuss your previous experiences leading teams or projects. Share specific examples of how you've guided others and implemented best practices in software development.
✨Prepare for Technical Challenges
Expect to face some coding challenges or technical questions during the interview. Practice common algorithms and data structures, and be ready to demonstrate your problem-solving skills using TDD principles. It’s a great way to show your hands-on experience!
✨Emphasise Collaboration and Communication
This role requires working with cross-functional teams, so highlight your ability to collaborate effectively. Be ready to discuss how you’ve worked with architects and clients in the past, and how you ensure clear communication within your team.
