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Prompt Engineer/ AI EngineerLogin to view salary
Quận Cầu Giấy, Hà Nội
Junior Fulltime1 năm
Application deadline: 19-12-2025

Vitex Vietnam is a technology company specializing in IT Outsourcing and customized AI solutions. We are expanding our team to develop AI-powered products that integrate with ChatGPT APIs or operate on self-hosted open-source AI models.

We are looking for a Prompt Engineer/ AI Engineer to research, develop, and deploy intelligent AI systems that optimize workflows and enhance user experiences.

1
Your role & responsibilities

You will be responsible for researching and developing AI-powered products that interact with ChatGPT or open-source AI models. Specifically:

Develop and Optimize AI Prompts

  • Design and test effective prompts to improve AI model accuracy.
  • Research and implement Prompt Engineering techniques to enhance AI-user interaction.
  • Build specialized prompt libraries for various use cases such as customer support, internal assistance, and virtual assistants.

AI Integration with APIs or Self-Hosted Models

  • Integrate ChatGPT API and AI models such as GPT-4, Claude, Llama, Mistral, etc., into internal systems.
  • Deploy and optimize self-hosted AI models using open-source frameworks like Hugging Face and LangChain.
  • Develop AI-powered chatbots and automated customer support systems.

AI Research & Optimization for Business

  • Stay updated with the latest AI models and apply them to real-world products.
  • Collaborate with product teams to integrate AI into internal workflows, such as report summarization, data analysis, and employee support.
  • Ensure smooth AI operations, accurate responses, and compliance with data policies.
2
Your skills & qualifications

Must-have

  • 1+ years of experience in AI (Machine Learning, NLP, Prompt Engineering, or Chatbot Development).
  • Understanding of OpenAI APIs and how to call APIs from ChatGPT or other AI models.
  • Proficiency in Prompt Engineering, with the ability to build and optimize AI prompt systems.
  • Experience deploying open-source AI models such as Llama, Mistral, Whisper, Stable Diffusion.
  • Strong programming skills in Python, FastAPI, LangChain, or similar frameworks.
  • Basic English communication skills and ability to read technical documentation.

Nice-to-have

  • Experience working with Hugging Face, OpenAI, Anthropic.
  • Hands-on experience deploying AI models on servers or cloud platforms.
  • Familiarity with Vector Databases (FAISS, Pinecone) and Retrieval-Augmented Generation (RAG).
  • Experience with Docker, Kubernetes for AI model deployment.
3
Benefits

Salary & Allowances:

  • Income: 10 – 22 million VND/month (negotiable based on experience).
  • 13th-month salary + end-of-year performance bonus.
  • Lunch allowance: 500,000 VND/month.
  • Holiday bonuses (April 30 & May 1, September 2, etc.).
  • Paid leave: 12 days of annual leave.
  • Health: Social insurance, health insurance, annual health check-up.
  • Recreation: Annual company trips, and quarterly team-building activities.
  • Laptop, monitor, and necessary equipment for work.

Career Growth Opportunities:

  • Annual salary reviews and defined promotion pathways.
  • Creative work environment that supports AI skill development.
  • Freedom to experiment and deploy AI solutions in real-world applications.
  • Career growth opportunities to become an AI Specialist or AI Manager.
  • Direct collaboration with the founding team to develop long-term AI strategies.

Working Environment:

  • Open workspace.
  • A vibrant and dynamic work atmosphere.
  • Language classes: English, Dutch, etc.
  • Clubs: badminton, soccer, pickleball, esports, etc.

Location

  • Level 12A, Song Da Cau Giay Building, No. 18, Alley 165 Cau Giay Str, Cau Giay Dist, Hanoi

Working Hours

  • 09:00 AM – 06:00 PM, Monday to Friday; remote on Wednesdays
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