Fullstack AI Engineer (Remote)
Vị trí làm việc từ xa cho kỹ sư Fullstack AI tại startup Mỹ, hợp đồng freelancer, yêu cầu cam kết toàn thời gian, làm việc trùng giờ Mỹ. Ứng viên phụ trách thiết kế, phát triển và triển khai sản phẩm AI (backend, frontend, tích hợp LLM), xây dựng UI, RAG pipeline, phối hợp trực tiếp với team founder, nhận mức thu nhập hấp dẫn và đầy đủ lợi ích làm việc từ xa.
Yêu cầu tối thiểu 3 năm kinh nghiệm phần mềm, thành thạo Python, FastAPI/Flask, React, TypeScript, Next.js, ít nhất 1 năm xây dựng sản phẩm AI/LLM, giao tiếp tiếng Anh giỏi, từng làm việc với startup Mỹ. Ưu tiên ứng viên từng xây chatbot, làm open source, có kinh nghiệm agent frameworks hoặc streaming API/WebSockets.
About Our Client
Our client is a US-based AI-driven startup building B2B SaaS products that embed AI deeply into real business workflows. They are a small, fast-moving team where engineers own features end-to-end — from architecture and model decisions to production rollout and UI experience.
This role is ideal for a senior-level Fullstack AI Engineer who has worked closely with US startup teams, communicates confidently in English, and has experience building and shipping products as a solo or core engineer.
What You’ll Do
- Design, build, and deploy AI-powered features end-to-end (model → backend → frontend).
- Fine-tune, integrate, and optimize LLMs and foundation models (OpenAI, Anthropic, Mistral, open-source).
- Build scalable backend services for AI workloads (Python, FastAPI, async APIs).
- Implement RAG pipelines, embeddings, and vector databases for production use cases.
- Design and develop user-facing AI interfaces (chat, dashboards, copilots).
- Own the entire product lifecycle: discovery, implementation, deployment, monitoring, and iteration.
- Collaborate directly with US-based founders, product managers, and designers.
- Monitor model quality, latency, cost, and reliability in production.
- Continuously improve system performance and developer experience.
Must-Have Requirements
- 3+ years of professional software engineering experience.
- 1+ year hands-on experience building AI/LLM-powered products.
- Strong Fullstack background:
- Backend: Python, FastAPI / Flask
- Frontend: React, TypeScript, Next.js
- DevOps: Docker, CI/CD, cloud deployment
- Practical experience with:
- LLM APIs (OpenAI, HuggingFace, LangChain, LlamaIndex)
- Prompt engineering & RAG architectures
- Embeddings and vector stores (Pinecone, FAISS, Weaviate, etc.)
- Experience working with US startup teams.
- Excellent English communication (spoken & written).
- Experience handling a product end-to-end, ideally as a solo or lead engineer.
- Comfortable working in fast-paced, ambiguous startup environments.
- Strong ownership mindset — you build it, you ship it, you improve it.
Nice-to-Have (Bonus)
- Built AI chatbots, copilots, or agent-based systems.
- Experience with streaming APIs or WebSockets.
- Familiarity with agent frameworks (AutoGen, LangGraph).
- Open-source contributions in AI or developer tooling.
Why Join
- Build real-world AI products used by actual customers.
- High ownership, low bureaucracy.
- Direct collaboration with US startup founders.
- Fully remote with flexibility and trust-based culture.
Location: Southeast Asia
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