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Senior Full Stack Engineer (f/m/d) at Kyan Health. Remote Location: REMOTE. About us:. Kyan Health is an AI-powered enterprise solution that connects employee well-being with measurable business impact. Using predictive analytics, Kyan helps companies monitor and reduce risks like absenteeism, turnover, and presenteeism.. We believe in harmonizing work and life, fostering a positive environment that champions . performance and personal growth and well-being . at the same time. Our culture thrives on innovation, collaboration, and the well-being of every team member.. Some things we’re proud of. 🧠 Building an industry leading solution for mental well-being. 🌎 300.000+ users across 90+ countries. 🤝 Partnered with 200+ licensed psychologists and coaches. 💲 €15M+ venture capital raised from renowned investors. 🎁 Awesome benefits, including unlimited access to our . Comprehensive Mental Health App. About The Role. Kyan Health is building the most advanced AI-augmented mental health and wellbeing platform in Europe. Our mission is to bring high-quality, clinically-grounded psychological support to employees and families across multiple countries, languages, and cultural contexts — with AI playing a central role.. We are looking for a . Senior Full Stack Engineer with deep AI experience. , particularly in:. AI agents & multi-step reasoning systems. LLM application architectures. Tool-calling, retrieval, orchestration, and evaluation. Modern AI toolchains and best practices. You will work closely with engineering, data, product, and clinical teams to build our AI features end-to-end and help shape the future of our platform.. This is a role with massive influence — we’re early enough that your architectural choices, code, and AI expertise will have a lasting impact.. Our stack. (You don’t need all of this, but strong React/TypeScript + AI foundations are essential.). Frontend. TypeScript. React + Next.js. React Native (plus React Native Web). Component libraries/design system. Backend & Data. Node.js (TypeScript). Event-driven and service-oriented architecture. BigQuery, PostgreSQL, NoSQL stores. Vector databases, retrieval pipelines. Cloud infra (GCP/Azure). AI Tooling & Ecosystem. OpenAI API & Assistants. Azure OpenAI (GPT, embeddings, structured outputs). LangChain, LlamaIndex, OpenAI function calling. Agent frameworks (custom, or e.g. LangGraph-style). Evaluation suites, guardrails, prompt tooling. Monitoring + model observability. What You'll do:. 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.. Who We're Looking For. Required:. 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.. Nice to Have: . 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.. Why Join Us. 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.. What's In It For You. 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:. CV Check . 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.