Full-Stack Engineer
Replicast AI · Remote / APAC
We’re looking for a skilled Full Stack Engineer to help build next-generation AI Digital Human applications powered by large language models (LLMs) and voice technologies. Key Responsibilities
Design, develop, and maintain web applications for AI Digital Human and conversational AI experiences. Build engaging and high-performance frontends using React.js and TypeScript. Develop secure, scalable backend services and RESTful APIs with Node.js and Express. Manage and optimize relational databases using MySQL. Integrate LLMs (OpenAI GPT models) to power intelligent, context-aware chat and voice interactions. Collaborate with AI and product teams to design conversational logic and user flows. Required Skills & Experience
Strong proficiency in React.js, TypeScript, and modern web development practices. Experience with responsive design and UI performance optimization. Solid hands-on experience with Node.js and frameworks like Express or NestJS. Experience designing and integrating RESTful APIs. Strong understanding of MySQL (schema design, indexing, performance tuning). Prefer experience deploying and maintaining systems on GCP and/ or AWS (Cloud Run, App Engine, Lambda, EC2, Cloud SQL/RDS, S3, etc.). Experience working with OpenAI APIs or similar LLM platforms. Knowledge of prompt engineering, conversational context management, and AI integration best practices. Familiarity with RAG pipelines (vector database, embeddings, knowledge base management) Familiarity with speech technologies (Text-to-Speech, Speech-to-Text) or voice interaction systems. Bonus Points
Prior experience developing Chatbots or Voicebots for customer service, sales, or virtual assistants.