Senior Full Stack Engineer (f/m/d)
<div class="show-more-less-html__markup show-more-less-html__markup--clamp-after-5 relative overflow-hidden"> Location<br/><br/>REMOTE; Berlin Office<br/><br/>Employment Type<br/><br/>Full time<br/><br/>Location Type<br/><br/>Remote<br/><br/>Department<br/><br/>EPDEngineering<br/><br/>OverviewApplication<br/><br/><strong>About<br/><br/></strong><strong> About us:<br/><br/></strong>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.<br/><br/>We believe in harmonizing work and life, fostering a positive environment that champions <strong>performance and personal growth and well-being </strong>at the same time. Our culture thrives on innovation, collaboration, and the well-being of every team member.<br/><br/><strong>Some things we’re proud of<br/><br/></strong><ul><li>🧠 Building an industry leading solution for mental well-being</li><li>🌎 300.000+ users across 90+ countries</li><li>🤝 Partnered with 200+ licensed psychologists and coaches</li><li>💲 €15M+ venture capital raised from renowned investors</li><li>🎁 Awesome benefits, including unlimited access to our Comprehensive Mental Health App<br/><br/></li></ul><strong>About The Role<br/><br/></strong>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.<br/><br/>We are looking for a <strong>Senior Full Stack Engineer with deep AI experience</strong>, particularly in:<br/><br/><ul><li>AI agents & multi-step reasoning systems</li><li>LLM application architectures</li><li>Tool-calling, retrieval, orchestration, and evaluation</li><li>Modern AI toolchains and best practices<br/><br/></li></ul>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.<br/><br/>This is a role with massive influence — we’re early enough that your architectural choices, code, and AI expertise will have a lasting impact.<br/><br/><strong>Our stack<br/><br/></strong><em>(You don’t need all of this, but strong React/TypeScript + AI foundations are essential.)<br/><br/></em><strong>Frontend<br/><br/></strong><ul><li>TypeScript</li><li>React + Next.js</li><li>React Native (plus React Native Web)</li><li>Component libraries/design system<br/><br/></li></ul><strong>Backend & Data<br/><br/></strong><ul><li>Node.js (TypeScript)</li><li>Event-driven and service-oriented architecture</li><li>BigQuery, PostgreSQL, NoSQL stores</li><li>Vector databases, retrieval pipelines</li><li>Cloud infra (GCP/Azure)<br/><br/></li></ul><strong>AI Tooling & Ecosystem<br/><br/></strong><ul><li>OpenAI API & Assistants</li><li>Azure OpenAI (GPT, embeddings, structured outputs)</li><li>LangChain, LlamaIndex, OpenAI function calling</li><li>Agent frameworks (custom, or e.g. LangGraph-style)</li><li>Evaluation suites, guardrails, prompt tooling</li><li>Monitoring + model observability<br/><br/></li></ul><strong>What You'll Do<br/><br/></strong><strong>AI Architecture & Agentic Systems<br/><br/></strong><ul><li>Design and implement coding agents, task-specific AI agents, and multi-step workflows that power user-facing features.</li><li>Build and refine retrieval pipelines, embeddings flows, and hybrid RAG/logic systems.</li><li>Architect robust prompting, function-calling, and tool orchestration systems.<br/><br/></li></ul><strong>Full Stack Product Development<br/><br/></strong><ul><li>Own features across Next.js, backend services, and mobile/web.</li><li>Translate product and clinical requirements into AI-powered user experiences.</li><li>Work with data pipelines, BigQuery, analytics, and experimentation frameworks.<br/><br/></li></ul><strong>Cross-platform UI Systems<br/><br/></strong><ul><li>Build and evolve our shared React/React Native component library and design system.</li><li>Ensure accessibility, performance, and multi-market language support.<br/><br/></li></ul><strong>Technical Leadership<br/><br/></strong><ul><li>Set coding standards for AI-integrated features.</li><li>Mentor others on AI architecture, LLM patterns, evaluation, and failures modes.</li><li>Challenge assumptions, propose better approaches, and push for pragmatic, responsible AI usage.<br/><br/></li></ul><strong>Required<br/><br/></strong><strong>Who We're Looking For<br/><br/></strong><ul><li>Senior-level engineering experience, ideally 6+ years, with strong autonomy.</li><li>Deep understanding of the modern LLM ecosystem: models, embeddings, fine-tuning, structured outputs, evaluation, latency/cost tradeoffs.</li><li>Hands-on experience building production AI agents (e.g., planning/multi-step systems, tool-calling, retrieval-integrated workflows).</li><li>Strong React + Next.js + TypeScript experience.</li><li>Experience building cloud-hosted applications (Azure, GCP, etc.).</li><li>Solid backend experience with Node.js, APIs, data modeling, auth, performance.</li><li>Familiarity with BigQuery or similar analytical data warehouses.</li><li>Strong product awareness — focus on usability, clarity, and delivering outcomes.</li><li>Pragmatic engineering mindset: readable code, clear patterns, low complexity.<br/><br/></li></ul><strong>Nice To Have<br/><br/></strong><ul><li>Prior work in healthtech, HR tech, or other sensitive domains.</li><li>Experience with evaluation frameworks, AI observability, or human-in-the-loop workflows.</li><li>Background in mobile development (React Native, native iOS/Android).</li><li>Experience with multi-language or multi-market products.<br/><br/></li></ul><strong>Why Join Us<br/><br/></strong>Make an Impact: Your work will directly contribute to improving mental health in workplaces around the world.<br/><br/>Ownership: You'll have the chance to take ownership of our content production processes<br/><br/>Innovative Environment: Work in a greenfield space where your ideas aren't just welcome—they're essential.<br/><br/>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.<br/><br/><strong>What's In It For You<br/><br/></strong><ul><li>Full Access to Our Comprehensive Mental Health App:</li><ul><li>Unlimited use of Kyan Health's AI well-being companion "KAI" and guided meditation courses.</li><li>Unlimited sessions with licensed psychologists.</li><li>Unlimited sessions with ICF-certified coaches.</li></ul><li>Competitive compensation, adjusted for experience.</li><li>Meaningful stock options in a rapidly growing AI-driven healthtech company.</li><li>Work with a mission-driven team and product that genuinely helps people.</li><li>Hybrid in Berlin or remote within CET±4.</li><li>Autonomy, ownership, and a chance to shape foundational AI systems from the ground up.<br/></li></ul><strong>Interview Process<br/><br/></strong><ul><li>CV Check </li><li>Get to know Kyan, Girish (30 minutes Call)</li><li>Get to know your manager, Nacho (45 minutes Call)</li><li>Team Interview(s), ( 30 minutes each call)</li><li>Online or Onsite Live Coding Exercise (Nacho/Team, 120 minutes)</li><li>Offer Stage: Meet the founder(s) (30 minutes) / Reference check / Offer<br/><br/></li></ul><strong>Please note:</strong> We only accept applications submitted through our official Careers Page. Applications submitted via other channels will not be considered.<br/><br/>🤩We are excited to hear from you!<br/><br/>⛔Please note that we do not work with agencies or external recruiters.<br/><br/>Powered by Ashby<br/><br/>Privacy PolicySecurityVulnerability Disclosure </div>