Senior Ai Engineer (Llm)

Proxify is seeking a Senior AI Engineer to lead the development and scaling of their Large Language Model (LLM)-powered solutions, focusing on prompt engineering, RAG architecture, fine-tuning, and deployment.

Location: Remote

Responsibilities

• Architect and implement complex AI workflows using frameworks like LangChain, LlamaIndex, or Haystack.
• Design and optimize Retrieval-Augmented Generation (RAG) pipelines, including vector database management (Pinecone, Weaviate, or Milvus) and advanced indexing strategies.
• Evaluate and implement strategies for model selection (OpenAI, Anthropic, or Open Source like Llama 3) based on latency, cost, and performance requirements.
• Develop high-performance Python backends (FastAPI or Flask) to serve AI features to our global user base.
• Build robust evaluation frameworks to measure LLM accuracy, reduce hallucinations, and monitor production performance using tools like LangSmith or Arize Phoenix.
• Work closely with product and engineering teams to identify high-impact AI opportunities and navigate the technical trade-offs of generative AI.

Requirements

• Expert-level Python skills with a deep understanding of asynchronous programming and backend architecture.
• Proven experience building and deploying production-level applications using Large Language Models (LLMs).
• Strong experience with SQL and NoSQL databases, specifically optimized for high-dimensional vector search.
• Familiarity with deploying AI models in cloud environments (AWS, GCP, or Azure) and managing CI/CD for AI services.
• A "first-principles" approach to solving the unique challenges of non-deterministic AI outputs.
• Experience with fine-tuning open-source models using techniques like LoRA or QLoRA.
• Knowledge of agentic frameworks and autonomous AI agents.
• A background in traditional NLP (Spacy, NLTK) or classic Machine Learning.

Benefits

• Enjoy on-time monthly payments with flexible withdrawal options.
• Enjoy a harmonious work-life balance with consistent 8-hour working days with clients.
• Enjoy up to 24 flex days off per year without losing pay, for full-time positions found through Proxify.
• Discover exclusive long-term remote positions at the world's most exciting companies.
• Skip the typical recruitment roadblocks and biases with personally matched positions.
• A one-time contracting process for endless opportunities, with no extra assessments.
• Enjoy the same pay, every month with positions landed through Proxify.