【Position】
AI Application Engineer ( Senior Level )
【Summary】
A growing startup IT company is seeking a highly skilled Senior Software Engineer to join their team. The ideal candidate will play a key role in designing, developing, and deploying API services powered by Large Language Models (LLMs) while integrating seamlessly with existing TypeScript-based backend systems.
【Essential Duties】
・Design, develop, and deploy a Python-based API server with LLM
・Build API endpoints using FastAPI
・Implement LLM workflows using LangChain/LangGraph libraries
・Develop vector search functionality with Qdrant DB
・Implement real-time communication with the frontend using WebSockets
・Effectively integrate with the existing TypeScript backend
・Optimize LLM functionality for performance and cost
・Collaborate with team members to improve the overall system
【Working Hours, Working style】
Monday - Friday; 8 hours a day
Core hours: 9:30 AM – 2:30 PM (Flexible schedule outside core hours)
【Working Location】
Irvine, CA
【Salary/Benefit】
$100K - 140K DOE
Health insurance
Retirement plan (simple IRA)
Paid time off (PTO) & sick leave
【Holidays】
Saturdays, Sundays, and major US holidays
【Qualifications 】
Required:
Business-level proficiency in English (spoken and written) 5+ years of professional experience in Python development Proven experience building and deploying production-level applications using LLMs (e.g., GPT, Claude, Azure OpenAI, or Google Gemini) Solid understanding of RESTful API design and development Experience integrating AI features into real-world applications
Experience or interest in the following technologies: FastAPI LangChain / LangGraph Qdrant or other vector databases WebSocket communication Basic knowledge of TypeScript and React for integration with frontend systems
Preferred/Plus:
Familiarity with prompt engineering, fine-tuning, or retrieval-augmented generation (RAG) Hands-on experience with OpenAI, Anthropic, or other model APIs in scalable environments Awareness of AI safety, latency management, and cost optimization strategies
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