AI Engineer

About the Position

AI Engineer Jobs- Vetted Contract Roles at Top AI-Native Product Companies

Pass vetting once. Get continuous access to senior AI Engineer projects across LLM API integration (OpenAI, Anthropic, Google Gemini), RAG infrastructure, vector databases (Pinecone, FAISS, pgvector), agentic systems (LangChain, LangGraph), multi-provider orchestration, voice AI (Whisper, ElevenLabs), and production AI product features - we’ll keep sending opportunities until the right match lands. No re-applying, no bidding wars.

Responsibilities

• Architect and build AI-powered tools and systems
• Integrate LLMs into various applications
• Develop robust AI models and infrastructure
• Collaborate with cross-functional teams to deliver AI solutions

Requirements

• 5+ years of commercial software engineering experience
• 1+ year of production AI/LLM API integration work
• Strong proficiency with at least one LLM SDK / framework (OpenAI, Anthropic, Google Gemini, Cohere, LangChain, LangGraph, Llama Index)
• Production experience with at least one vector database (Pinecone, FAISS, pgvector, Weaviate, Qdrant, Chroma)
• Specialization in RAG infrastructure, agentic systems, multi-provider orchestration, voice AI integration, or AI evaluation infrastructure
• Strong evaluation + observability mindset (Phoenix, LangSmith, Helicone, custom eval harnesses)
• Production deployment experience (FastAPI + Modal / AWS Lambda / Vercel edge / serverless)
• Comfortable working async with US/EU teams
• English: Upper-Intermediate or higher
• Available for 20+ hours/week - part-time and full-time both supported

Nice to Have

• Experience with Python, AI, NLP, AWS, GitHub, Golang, JavaScript, REST, Machine Learning, OpenAI API, GPT-4, PostgreSQL, GraphQL, C++, TensorFlow, PyTorch, CUDA, Docker, Kubernetes

We Offer

• Competitive hourly rate: $20-$70
• Long-term projects (avg 9+ months)
• No bidding wars
• Direct collaboration with clients
• Continuous access to new projects matched to your stack and preferences

About the Company

Lemon.io is a developer talent marketplace connecting AI Engineers with funded AI-native product companies and SMBs for remote contract roles. Developers pass vetting once (5 days average) and get continuous access to a pipeline of pre-vetted projects - Lemon.io rejects 60% of applying companies based on funding stability, product clarity, technical specs, and engineering culture.

Apply to Get Matched