MCS Group is thrilled to be partnering with a fast-growing, forward-thinking tech company that's building a globally-used product utilised across multiple industry sectors. With significant investment secured in the last 12 months, and major growth plans already underway for the rest of 2025, they're looking for a Principal Java Developer to play a pivotal role in the evolution of their core software platform. As their Principal Java Engineer, you'll join a small yet collaborative, high-performing software engineering team and take ownership of a critical product area. You'll be at the forefront of architecture and development while mentoring the next generation of software talent and less experienced software engineers -all under the guidance (and support) of a visionary Head of Engineering and CTO. If you're looking for a role where you can lead, innovate, and make a real impact, this could be the move for you. Why You Should Apply: Be part of a compact, agile team that punches well above its weight Lead in a fast-paced environment where your ideas and impact will be visible Shape best practices and push cloud-native solutions forward Enjoy fast-tracked career progression in a well-funded business which is scaling What You'll Be Doing: Architect and build complex, scalable applications using modern Java and AWS services Set and uphold engineering standards across the team Collaborate closely with product and hardware teams to deliver secure, high-performance systems Mentor and support junior engineers, fostering a culture of continuous learning Stay at the cutting edge-bring new ideas, tools, and methods into the team What We're Looking For: Deep experience with Java (latest versions), Spring Boot, and microservices Strong hands-on knowledge of event driven systems Experience of working in scaling tech companies and/or product-focused tech start-ups will be highly advantageous Natural leadership skills with a passion for mentoring and team development A problem-solver with a drive for clean, modern software engineering What's in it for You: Salary up to £95,000 Bonus scheme (10%) Share options Flexible hybrid working (1-2 days in office per week) Huge opportunity for growth and progression To speak in absolute confidence about this opportunity, please send an up-to-date CV via the link provided or contact Chris Busby, Associate Director - IT Recruitment UK & Ireland, at MCS Group Even if this position is not right for you, we may have others that are. Please visit MCS Group to view a wide selection of our current and exclusive roles All conversations will be treated in the strictest of confidence. Skills: Java Developer Principal Software Engineer Software Developer Full stack developer Staff software engineer