Principal Software EngineerLocation: London - 1x a monthSalary: £95,000 - £120,000 + equity + benefitsAn established, global technology business within the hospitality-tech industry is seeking an accomplished Principal Software Engineer to lead the design and delivery of next-generation digital solutions. This is an opportunity to shape greenfield projects from the ground up - architecting scalable, data-driven systems that empower venues to deliver seamless guest experiences and drive long-term innovation.What will I be doing?Lead the technical vision and architectural direction across complex Back End systems, ensuring scalability, reliability, and performance.Partner closely with engineering leadership to define best practices, coding standards, and long-term technical strategy.Design, develop, and oversee the delivery of robust, production-grade software built using Python, Django, Cloud Firestore, BigQuery, and Elasticsearch.Mentor and guide engineers at all levels, fostering a culture of technical excellence and continuous improvement.Collaborate with cross-functional teams - including product, data, and design - to deliver innovative solutions that directly impact customer success.Evaluate and implement emerging technologies that enhance system performance and developer productivity.Take ownership of mission-critical initiatives, balancing technical depth with business priorities to deliver scalable, maintainable solutions.What do I need to be successful?Degree in Comp