LLM Engineer - Freelancer

Monterail is building a network of LLM Engineers to design, build, and integrate practical AI features into existing products on a freelance basis.

• Strong software engineering background in Python, Node.js, or Ruby
• Hands-on experience integrating LLM APIs into production systems (OpenAI, Anthropic, or similar)
• Ability to design pragmatic AI solutions within existing architectures
• Experience building RAG pipelines, embeddings, and vector search
• Understanding of cost, latency, and reliability constraints of AI systems
• Ability to work independently with clients and set realistic expectations
• Background in big data or data pipelines is a big plus
• English proficiency at B2/C1 level
• Availability for part-time or full-time work on a B2B contract

• Add AI functionality into existing Python, Node.js, and Ruby codebases
• Build LLM-powered features: chat, summaries, classification, smart search, document Q&A
• Design lightweight RAG pipelines using embeddings and vector search
• Work with vector databases such as pgvector, Pinecone, Qdrant
• Implement safe and reliable LLM endpoints (OpenAI, Anthropic, Azure)
• Work directly with clients to shape AI features and reduce manual effort
• Advise clients on AI usage considering latency, accuracy, and cost trade-offs

The data controller is Monterail sp zoo located at Oławska 27/29, Wrocław. Candidates have rights regarding their personal data including access, rectification, erasure, and objection to processing. Personal data is processed for recruitment purposes only. Providing data required by labor law is mandatory; other data is voluntary. Refusal to provide mandatory data may prevent recruitment. Data will be processed until recruitment ends and for possible claims. Consent to future recruitments may be withdrawn at any time. Rocket Jobs and associated entities may access the data related to recruitment.