Role: Product (Software) Engineer.\nYou'll be one of the first engineers at Aniva, shipping the preventive health OS that powers personalized 162-biomarker testing, supplement packs, and action plans. Full-stack and product-minded — you own features end-to-end from idea to shipped, working directly with Jan and the founding team. No PMs, no hand-offs.\n\nWhat you'll do:\n• Ship product end-to-end across the stack (web app, backend, integrations with lab partners and supplement manufacturers)\n• Build the customer-facing experience: biomarker dashboards, action plans, subscription flows, health concierge tooling\n• Set up and own engineering infrastructure as we scale from pre-seed to Series A and beyond\n• Use AI tooling aggressively — we expect you to ship 5x faster because of it\n\nWhat we're looking for:\n• Strong product intuition + clean, shippable code (TypeScript / Next.js / Postgres preferred, but stack-agnostic if you're T-shaped)\n• 0→1 experience: shipped real software in a startup, as a founder, or as a serious indie hacker\n• Tech-savvy across the modern AI dev loop (Cursor / Claude Code, evals, agentic tooling)\n• Excited about preventive health, longevity, and the science of biomarkers\n\nLogistics:\n• In-person in Berlin, Mon–Fri (this is non-negotiable — we build in person)\n• Full-time\n• German not required — English working language