Kyan Health - Senior Full Stack Engineer (f/m/d)
Requirements
• Senior-level engineering experience, ideally 6+ years, with strong autonomy. • Deep understanding of the modern LLM ecosystem: models, embeddings, fine-tuning, structured outputs, evaluation, latency/cost tradeoffs. • Hands-on experience building production AI agents • (e.g., planning/multi-step systems, tool-calling, retrieval-integrated workflows). • Strong React + Next.js + TypeScript experience. • Experience building cloud-hosted applications (Azure, GCP, etc.). • Solid backend experience with Node.js, APIs, data modeling, auth, performance. • Familiarity with BigQuery or similar analytical data warehouses. • Strong product awareness — focus on usability, clarity, and delivering outcomes. • Pragmatic engineering mindset: readable code, clear patterns, low complexity. • Prior work in healthtech, HR tech, or other sensitive domains. • Experience with evaluation frameworks, AI observability, or human-in-the-loop workflows. • Background in mobile development (React Native, native iOS/Android). • Experience with multi-language or multi-market products.
Responsibilities
• AI Architecture & Agentic Systems • Design and implement coding agents, task-specific AI agents, and multi-step workflows that power user-facing features. • Build and refine retrieval pipelines, embeddings flows, and hybrid RAG/logic systems. • Architect robust prompting, function-calling, and tool orchestration systems. • Full Stack Product Development • Own features across Next.js, backend services, and mobile/web. • Translate product and clinical requirements into AI-powered user experiences. • Work with data pipelines, BigQuery, analytics, and experimentation frameworks. • Cross-platform UI Systems • Build and evolve our shared React/React Native component library and design system. • Ensure accessibility, performance, and multi-market language support. • Technical Leadership • Set coding standards for AI-integrated features. • Mentor others on AI architecture, LLM patterns, evaluation, and failures modes. • Challenge assumptions, propose better approaches, and push for pragmatic, responsible AI usage.
Benefits
• Make an Impact: Your work will directly contribute to improving mental health in workplaces around the world. • Ownership: You'll have the chance to take ownership of our content production processes • Innovative Environment: Work in a greenfield space where your ideas aren't just welcome—they're essential. • Collaborative Team: Join a supportive team where collaboration and innovation are at the heart of what we do. We are an easy to work with & low ego team, and want to keep it like that. • Full Access to Our Comprehensive Mental Health App: • Unlimited use of Kyan Health's AI well-being companion "KAI" and guided meditation courses. • Unlimited sessions with licensed psychologists. • Unlimited sessions with ICF-certified coaches. • Competitive compensation, adjusted for experience. • Meaningful stock options in a rapidly growing AI-driven healthtech company. • Work with a mission-driven team and product that genuinely helps people. • Hybrid in Berlin or remote within CET±4. • Autonomy, ownership, and a chance to shape foundational AI systems from the ground up. • Interview Process: • Get to know Kyan, Girish (30 minutes Call) • Get to know your manager, Nacho (45 minutes Call) • Team Interview(s), ( 30 minutes each call) • Online or Onsite Live Coding Exercise (Nacho/Team, 120 minutes) • Offer Stage: Meet the founder(s) (30 minutes) / Reference check / Offer • Please note: We only accept applications submitted through our official Careers Page. Applications submitted via other channels will not be considered. • 🤩We are excited to hear from you! • ⛔Please note that we do not work with agencies or external recruiters.
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