Join to apply for the Senior Full-Stack Developer (.NET, Angular, Azure) role at apeirum. Get AI-powered advice on this job and more exclusive features. We are hiring a Senior Full-Stack Developer for a health tech business. The company owns a platform that combines 3D body scanning with powerful analytics to help fitness and wellness professionals visualize and measure transformation in a whole new way. You’ll be part of a small, experienced team helping to evolve and scale a stable product used worldwide. This is a great role if you enjoy clean architecture, smart problem-solving, and bringing meaningful ideas to the table. You’ll be backed by a hands-on Product Owner and former CTO (available for sparring), with the freedom to code, improve, and grow. Tasks Your Responsibilities Build and maintain features across a .NET backend and Angular frontend Help stabilize and evolve a mature SaaS product Contribute to architectural discussions and propose improvements Collaborate closely with leadership on product direction and roadmap Own key features end to end, from concept to release Collaborate closely with a Product Owner (from apeirum) and remote teammates Participate in long-term product evolution — not just execution Identify AI opportunities (Dev workflows, product features, etc.) The product is stable, and the team is small and senior You’ll work with autonomy, but not alone You’ll have space to contribute ideas, propose features, and make things better The team values clean architecture, sustainable code, and thoughtful delivery Requirements Have a Bachelor’s / Master’s in Computer Science, Data Engineering, or related field. Have 3–8 years of experience as a full-stack developer using .NET and Angular Write clean, maintainable, and well-tested code Are comfortable with cloud infrastructure (especially Azure) Care about product quality and want your work to have real impact Are product-minded — you care about the why, not just the what Are self-driven and enjoy collaborating in small, async, distributed teams Want the chance to grow into more responsibility Curious about 3D tech and AI (you don’t need to be an expert — just open) Frontend: Angular Backend: C#, .NET Core, Web API, Entity Framework Cloud: Azure (Functions, VMs, App Services, Monitoring, Storage) Database: SQL Bonus: Python & C++ (used in 3D pipeline; nice to have but not required) Strong problem-solving skills and passion for AI-driven automation Comfortable in a fast-paced startup with a problem-solving, AI-first approach. Why Join Our Team? Continuous Improvement: Be part of a team dedicated to enhancing and evolving existing products, not just maintaining them. Innovation-Driven: Contribute to product innovation, adding new features and capabilities that keep our solutions ahead of the curve. High-Performance Environment: Join a team that values excellence, resilience, and a passion for creating lasting impact. Professional Growth: Opportunities for professional development and skill enhancement. Team Activities: Join us for a yearly strategic offsite meetings filled with team-building activities and social events. Ready to Make an Impact? This role requires adaptability, a problem-solving mindset, and the ability to thrive in a fast-paced, innovation-driven environment. If you’re excited about shaping the future of health and wellbeing, we’d love to hear from you. Seniority level Associate Employment type Full-time Job function Information Technology Software Development Referrals increase your chances of interviewing at apeirum by 2x. Get notified about new Full Stack Engineer jobs in Spain. Madrid, Community of Madrid, Spain 17 hours ago Madrid, Community of Madrid, Spain 4 weeks ago Nava, Principality of Asturias, Spain 1 week ago Madrid, Community of Madrid, Spain 8 months ago Salamanca, Castilla and Leon, Spain 1 week ago Valladolid, Castilla and Leon, Spain 1 week ago Álava, Principality of Asturias, Spain 1 week ago Oviedo, Principality of Asturias, Spain 1 week ago Madrid, Community of Madrid, Spain 1 week ago Madrid, Community of Madrid, Spain 3 days ago Burgos, Castilla and Leon, Spain 4 days ago We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI. J-18808-Ljbffr