Senior Fullstack Engineer

About the Role Join a growing European B2B AI communications company as a Senior Fullstack Engineer, building customer-facing voice AI software. You will own features from early discovery through deployment and help shape product priorities through direct customer insight. What You'll Do Build and evolve full-stack features using TypeScript, NestJS, Node.js, and React. Take features from concept and prototyping through production deployment. Engage with customers through support, feedback sessions, and user testing to understand their needs. Break down opportunities into focused releases, gather feedback, and iterate quickly. Contribute to feature prioritization and the voice AI product roadmap. Ship software frequently while maintaining a strong focus on customer value. What We're Looking For At least 5 years of full-stack engineering experience delivering SaaS products and end-to-end web features. Production experience with TypeScript, React, and Node.js; NestJS experience is preferred. Experience owning customer-facing software from technical decisions through release. Native German proficiency and fluent English. Strong product judgment, including customer discovery, feature prioritization, and using feedback or metrics to guide decisions. Comfort working in a fast-moving environment with frequent releases and direct customer interaction. Experience with LLM integrations, early-stage startups, or European AI compliance considerations is a plus. Compensation & Benefits