Work location: CMC Tower, 11 Duy Tan Street, Cau Giay District, Hanoi.

1. Job Description

• Participate in the design, development, and operation of AI products (chatbots, AI Voice, AI agents, LLM-based automation tools, etc.) from the concept stage to market launch.
• We build both the frontend (modern UI/UX, real-time streaming, chat interface) and the backend (API, microservices, data processing pipeline, LLM integration).
• Integrating and optimizing AI models: OpenAI, Anthropic, Gemini, open-source LLMs , frameworks such as LangChain, LlamaIndex, RAG pipelines, and Vector Databases .
• The system architecture design should be scalable, optimizing inference costs, latency, and accuracy.
• Code review, mentor juniors, participate in technical guidance for the team.
• Collaborate closely with Product, Designer, and AI/ML Engineers to transform ideas into truly valuable features.

2. Candidate requirements

• Minimum 3 years of Fullstack experience , including at least 1 year working on real-world AI products (not just demos).
• Proficient in Frontend : React/Next.js, TypeScript, TailwindCSS.
• Proficient in Backend development: Node.js/NestJS or Python (FastAPI/Django), designing REST/GraphQL APIs.
• Experience working with LLM APIs (OpenAI, Claude, Gemini…), prompt engineering , function calling , and streaming responses .
• I understand and have implemented RAG and Vector DB (Pinecone, Weaviate, Qdrant, pgvector…).
• Database: PostgreSQL, MongoDB, Redis.
• Understanding the basics of DevOps: Docker, CI/CD, deployment on AWS/GCP/Azure.
• Good product thinking involves asking "why" before coding.

Pros:

• I have a personal/open-source AI product, active on GitHub.
• Experience with AI Agent frameworks : LangGraph, AutoGen, CrewAI.
• I have experience working with fine-tuning, embedding, and evaluation pipelines .
• Experience in optimizing token costs, caching, and model routing.
• Good English reading and writing skills (reading papers, technical documents).

3. Candidate Benefits

• Fixed salary up to 30,000,000 VND (negotiable based on ability, potentially higher for outstanding candidates).
• Project performance bonus + Tet bonus (13th and 14th month salary).
• Salary reviews are conducted twice a year .
• Ensure full compliance with social insurance, health insurance, unemployment insurance, etc., as stipulated by the Labor Law and company regulations;
• A professional, creative, open, and youthful environment.
• Working hours: Monday to Friday (8:30 AM – 5:30 PM daily), every other Saturday (flexible on/off schedule);