Are you a senior full stack engineer who loves building products and experimenting with AI? At ZendZend, we create innovative media solutions and are looking for a Senior Software Engineer (Full Stack & AI) to help shape and scale our next-generation platforms. If you enjoy working with .NET, React and applying AI to real-world problems in a fast-moving startup environment, this role is for you. Who are we looking for? You are a Senior Software Engineer (Full Stack & AI) with a strong product mindset and a proven ability to design, build, and ship scalable systems. 5+ years of experience building and shipping full-stack products, with a strong track record of delivering high-quality, production-ready code Proficient in modern frontend development using React and TypeScript Strong backend expertise with .NET, C#, .NET Core, and Entity Framework Solid understanding of systems design, performance trade-offs and scalable architecture Hands-on experience building and integrating AI-driven features into production applications Familiarity with machine learning models, LLMs, and AI APIs (e.G. Azure AI, OpenAI or similar) Experience with Python and AI/ML frameworks (such as PyTorch, TensorFlow or similar) Ability to evaluate model performance, latency, cost, and reliability in real-world systems Fluent in Dutch and English. What do we offer? A competitive compensation package including a powerful laptop, iPhone, Tesla Model 3, group insurance, and meal vouchers. A cozy office located in Diest, away from traffic jams. A dynamic work environment with opportunities for personal and professional growth. The opportunity to work on challenging projects at an innovative company. Flexible working hours. 32 days of annual leave