OverviewThis range is provided by MRJ Recruitment. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.Direct message the job poster from MRJ RecruitmentPrincipal Back-End Developer – Lead, Build & Shape a High-Growth SaaS PlatformUp to £80,000 | C#, .NET, Azure, TDD | Manchester HQBonus scheme | Learning & development budget | Tech-focused cultureWe’re working with a fast-growing, award-winning SaaS company that’s creating products loved by businesses across the UK. As the business scales, they’re seeking a Principal Back-End Developer to play a key role in shaping both the technology and the engineering culture.Here, technology isn’t just a support function, it’s the product itself. You’ll be part of a collaborative, cross-functional team that thrives on brainstorming, hands-on coding, bold ideas, and continuous improvement.If you enjoy leading by example, designing architectures, mentoring colleagues, and staying close to the code, this could be the role you’ve been looking for.What You’ll Be Doing:Define and drive the technical direction across multiple productsBuild scalable, high-performance applications using .NET Core, Azure, and modern engineering practicesMentor engineers and elevate team capabilities through guidance and supportWork closely with Product, QA, Design, and Delivery teams — your input will influence key decisionsPromote high-quality software through TDD, CI/CD, and a culture of continuous improvementWhat You’ll Bring:Proven expertise in C#, .NET Core, and cloud platforms such as AzureStrong understanding of TDD, CI/CD, and building scalable systemsStrategic thinking with the ability to make informed, practical technical decisionsExcellent interpersonal skills — whether mentoring, pair programming, or leading discussionsWhy This Role?Take ownership of a growing engineering team and influence the company’s future directionWork in a collaborative environment where the best ideas come from team discussionJoin a tech-first company where engineering drives the business forwardThrive in a culture that encourages learning and supports experimentationBe part of a people-focused organisation with a 4.8 Trustpilot rating and a genuinely enjoyable cultureThis is your chance to lead from the front, stay hands-on with code, and shape the future of a high-growth SaaS business.Ready to make an impact? Apply today or get in touch to find out more.Seniority levelMid-Senior levelEmployment typeFull-timeJob functionEngineering and Information TechnologyIndustries IT System Custom Software Development #J-18808-Ljbffr