Principal Full Stack Engineer - Full or Part Time

In this Principal Full Stack Engineer role, you will shape system design and architecture for Autotrader’s large-scale platform, spanning millions of requests daily. You’ll mentor teams, drive high-quality solutions, and collaborate across cross-functional squads. You’ll work with Java, Spring Boot, React/Angular, and modern data stores to build scalable, reliable software that powers a diverse marketplace. This is an opportunity to influence engineering culture and delivery at scale, in a collaborative, people-first environment.

• salary 60,000–80,000
• annual 10% share award
• 28 days holiday plus bank holidays
• private medical cover
• pension scheme
• car salary sacrifice scheme

• Design scalable backend and frontend architectures
• Mentor and lead engineering teams
• Drive high-quality delivery at scale
• Collaborate across cross-functional teams to align on architecture
• Promote best practices such as TDD and continuous delivery

• Experience across the stack from backend to frontend
• Proficiency with Java, Spring Boot and JVM ecosystem
• Architecting complex distributed systems that are scalable and maintainable
• Frontend experience with React or Angular and TypeScript/modern JavaScript
• Strong SQL and MongoDB experience
• Experience with Kafka or event-driven architectures
• Structured development and testing approach with automation and CD
• Proven leadership and mentoring ability

• Collaborative mindset
• Mentoring and coaching
• Strong communication
• Java
• Spring Boot
• React or Angular