Senior Full Stack Engineer - AI-Powered Healthcare Platforms

About the role

Johnson & Johnson's TS APAC Digital and Connected Commerce team is looking for a Senior Full Stack Engineer in Singapore. The role builds scalable, AI-powered platforms that connect healthcare professionals with J&J products, using full-stack technologies and Generative AI. It is a hands-on engineering position in a fast-paced, collaborative Agile environment, working with product, design and business stakeholders.

Key responsibilities

• Design, build and maintain scalable web applications with Node.js, TypeScript, React and/or Python.
• Develop RESTful or GraphQL APIs and integrate third-party services.
• Build responsive, accessible UI components with modern UX patterns.
• Design data models using SQL and NoSQL databases.
• Deploy and operate applications in AWS, and use serverless, microservices and containerized architectures.
• Integrate LLM APIs (OpenAI, Anthropic, Bedrock) and build AI features such as search, summarization, recommendations and conversational interfaces.
• Use LangChain, LangGraph or similar orchestration tools, and AI-assisted development tools such as GitHub Copilot or Amazon Kiro.
• Apply spec-driven development, generate tests and documentation with AI, and review code with human validation.
• Take part in code reviews, technical design discussions and Agile ceremonies, and collaborate across teams.

Required profile

• 4-8 years of experience developing and deploying production-grade web applications.
• Strong full-stack experience building scalable systems, with cloud platform experience (AWS preferred).
• Hands-on experience integrating LLM APIs or AI-powered features, and familiarity with LangChain, LangGraph or similar.
• Experience with AI-assisted coding tools, prompt engineering and evaluation of LLM outputs.
• Strong understanding of Git workflows, code reviews, CI/CD and Agile.

Required skills

• Node.js, TypeScript, React, Python, SQL and NoSQL
• RESTful and GraphQL APIs
• AWS
• LangChain, LangGraph
• GitHub Copilot, Amazon Kiro
• Good to have: WebSockets, Docker, Kubernetes, Jenkins, Argo, mobile apps or PWAs