Python Backend Engineer

Work remotely in Vietnam

We are building the next-generation AI customer service system, combining large language models (LLMs), knowledge graphs, and vector search to deliver smarter and more efficient customer support.

As a Python Backend Engineer, you will:

• Develop and optimize backend APIs using FastAPI

• Build intelligent data logic with Pydantic AI / Pydantic Graph

• Integrate and fine-tune Qdrant (or other vector databases) for semantic search

• Collaborate with AI and product teams to design scalable backend services

• Contribute to system architecture discussions with focus on performance, stability, and security

• Ensure backend services can support enterprise-grade workloads with high availability

• Continuously optimize code quality, maintainability, and development workflows

• Work in a flexible setup – remote or on-site

Requirements

• Proficient in Python with solid backend development experience

• Hands-on experience with FastAPI

• Familiarity with Pydantic (knowledge of Pydantic AI / Graph is a plus)

• Experience with vector databases (Qdrant, Pinecone, Weaviate, etc.)

• Strong understanding of clean coding practices and software design principles

• Good problem-solving skills, adaptability, and eagerness to learn

Preferred / Nice-to-Have:

• Experience with LLM applications or semantic search systems

• Familiarity with Docker / Kubernetes / cloud-native deployment

• Exposure to system architecture or distributed system design