Hi, my name is Jan Brennenstuhl. As a Berlin-born and raised product-minded software engineer, I specialize in bridging security with usability. My journey in tech spans engineering leadership, e-commerce funnels, and modernizing customer identity and access management systems, including implementing robust single sign-on (SSO) solutions based on OAuth and OpenID Connect (OIDC). With a Master’s in Computer Science from the University of Potsdam and a deep passion for clean code, my expertise lies in crafting secure, reliable, and maintainable software products.Throughout my career, I’ve tackled challenges ranging from legacy migrations and modularizing monolithic systems to building high throughput, low latency APIs and identity providers. My hands-on experience extends to leading small, agile and interdisciplinary teams to deliver high-quality software solutions aligned with well-defined business objectives.I aim to create secure and user-friendly solutions without sacrificing performance. My work reflects a balance of meticulous software “archaeology” and forward-thinking product development in areas like Identity and Access Management (IAM) and e-commerce. Beyond engineering, I’m an avid cyclist, art enthusiast, and outdoor explorer.