Sr Full Stack Developer (Healthcare AI Platform) - Fulltime - EMEA/APAC

Location: Fully Remote (Preferably Poland or CET-compatible time zones) Type: Full-time

About the Role

We are building a next-generation, ontology-driven AI platform for the healthcare sector. An intelligent system that unifies fragmented data into a single semantic layer. This ontology forms the backbone of our agent architecture, enabling reasoning, context-aware automation, and structured decision support across some complex workflows.Although still in stealth mode, the product sits at the intersection of LLMs, knowledge graphs, and real-time workflow automation. You will help shape and build the core engine that powers this system.

We are searching for a Senior Full Stack Developer who can take ownership of major development areas, both architecturally and hands-on. You’ll work alongside the small technical founding team during initial design and prototyping, then operate autonomously to build, refine, and scale mission-critical features. This is a rare opportunity to help architect a platform that blends AI, structured knowledge, and modern cloud technologies from the ground up.

What You Will Work On

• Develop core components of our AI-powered SaaS platform using TypeScript across the stack • Build both frontend and backend services, with a strong focus on scalability, maintainability, and performance • Integrate AI models and LLM-based pipelines such as LangChain or RAG into product workflows • Design and manage cloud infrastructure using AWS or GCP with Infrastructure as Code tools such as Terraform • Implement secure data flows involving SQL and NoSQL databases • Deploy frontend applications to Vercel, managing environments, configuration, and performance • Work closely with founders on technical direction, but operate independently day to day • Ensure code quality using modern patterns, testing strategies, and best practices

Core Technologies

Frontend • React and Next.js with TypeScript • TanStack Query (useQuery), modern hooks, state management techniques

Backend • Node.js with TypeScript • Express.js or similar API frameworks • SQL (PostgreSQL) and NoSQL (MongoDB) • Infrastructure as Code (Terraform or similar)AI Integration • Experience interfacing with LLMs and related tooling • LangChain, RAG architectures, or similar frameworks • Conceptual understanding of vector databases and prompt engineering

Nice to Have

• Python for experimentation or prototyping
• Experience with secure data handling in regulated industries Familiarity with ontologies, taxonomies, or knowledge graph concepts (RDF, OWL, SHACL, schema design, or semantic data modelling)
• Experience building systems that consume structured semantic layers or graph-based APIs
• Exposure to domain-specific data modelling or standards-driven architectures

What We Are Looking For

• Minimum 5 years experience as a full stack developer at senior level or above • Strong expertise in TypeScript, React, and Next.js • Solid experience with both SQL and NoSQL databases • Proven capability in deploying and managing cloud infrastructure • Experience consuming or building AI-powered services • Fluent English, both written and spoken • Comfortable working independently with minimal supervision • Ability to take ownership of large development areas

What We Offer

• Fully remote arrangement with some flexibility in hours (minimum working overlap with UK time) • High autonomy, technically challenging work, and opportunities for leadership • The chance to work on a meaningful product that improves quality of care for the elderly

If you want to help build an AI-driven platform that makes a real difference and enjoy taking ownership of technical challenges, we would love to hear from you.