Senior AI-Driven Full-Stack Engineer

8438-Johnson & Johnson International (Singapore) Pte. Ltd. Legal Entity; Singapore; On-site; SGD 90,000 - 150,000; Full time

Job summary

Johnson & Johnson International Singapore seeks a Senior Full Stack Engineer to build AI-powered healthcare platforms, delivering scalable web apps using Node.js, TypeScript, React, and Python in an Agile team.

You will integrate LLM APIs, design robust data models, deploy on AWS, and collaborate with product and design to ship production-ready solutions that impact patients and health professionals.

Qualifications

• 4–8 years of experience developing production-grade web apps.
• Strong full stack experience (frontend + backend) building scalable systems.
• Experience with cloud platforms (AWS preferred).
• Hands-on experience integrating LLM APIs or AI-powered features into applications.
• Familiarity with frameworks such as LangChain, LangGraph, or similar.
• Experience using AI-assisted coding tools (e.g., Copilot, Amazon, Kiro) in day-to-day development.
• Experience with prompt engineering and evaluation of LLM outputs.
• Strong understanding of modern software engineering practices (Git workflows, code reviews, CI/CD, Agile).

Responsibilities

• Design, build, and maintain scalable web applications using Node.js, TypeScript, React, and/or Python.
• Develop and maintain RESTful or GraphQL APIs and integrate third-party services.
• Build responsive, accessible, and reusable UI components with modern UX patterns (e.g., real-time updates, streaming interfaces).
• Design and manage data models using SQL and NoSQL databases.
• Deploy and operate applications in AWS, following best practices for scalability, reliability, and observability.
• Work with modern architectures including serverless, microservices, and containerized environments.
• Integrate LLM APIs (e.g., OpenAI, Anthropic, Bedrock) into applications.
• Build AI-driven features such as search, summarization, recommendation, and conversational interfaces.
• Utilize frameworks such as LangChain, LangGraph, or similar orchestration tools.
• Prototype and evaluate new AI capabilities, rapidly iterating with an experimentation mindset toward production-ready, AI-first solutions.
• Leverage AI-assisted development (e.g., GitHub Copilot, Amazon Kiro, or similar) to accelerate coding, debugging, and testing.
• Practice AI-paired programming (human-in-the-loop development with LLMs;
• vibe coding
• iterating with LLMs to rapidly prototype and refine solutions.
• Apply spec-driven development, translating product requirements into structured prompts, schemas (e.g., OpenAPI/JSON), or executable specifications for AI-assisted implementation.
• Use AI for generating unit/integration tests, documentation, and code reviews to improve quality and velocity, with human validation and quality gates.
• Continuously evaluate and adopt emerging AI developer tools and workflows, with a focus on measurable improvements in developer productivity, code quality, and delivery speed.
• Write clean, maintainable, and well-tested code.
• Participate in code reviews, technical design discussions, and Agile ceremonies.
• Collaborate with cross-functional teams across business and technology domains.
• Contribute to a culture of continuous improvement, experimentation, and learning.

Skills

Full stack development

REST/GraphQL APIs

AI integration

Agile methodologies

Collaborative teamwork

Tools

Node.js

TypeScript

React

Python

AWS

Docker

Kubernetes

LangChain

LangGraph

Job description

Johnson & Johnson International Singapore seeks a Senior Full Stack Engineer to build AI-powered healthcare platforms, delivering scalable web apps using Node.js, TypeScript, React, and Python in an Agile team.

You will integrate LLM APIs, design robust data models, deploy on AWS, and collaborate with product and design to ship production-ready solutions that impact patients and health professionals.