Freelance LLM Engineer: Production AI Integrations

Monterail; Wrocław; On-site; PLN 165,000 - 331,000; Full time

Job summary

Monterail is building a network of LLM Engineers to design, build, and integrate practical AI features into existing products. We offer flexible freelance opportunities, part-time or full-time, depending on project needs.

This role prioritizes delivery, not ML research, with an emphasis on engineering foundations and integrating AI into production systems using Python, Node.js, or Ruby.

Qualifications

• Solid software engineering foundation 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.

Responsibilities

• 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 DBs (pgvector, Pinecone, Qdrant).
• Implement safe, reliable LLM endpoints (OpenAI, Anthropic, Azure).
• Work directly with clients to shape AI features and reduce manual effort.
• Advise clients when NOT to use AI and navigate trade-offs around latency, accuracy, and cost.

Skills

Python

Node.js

Ruby

LLM APIs

Data pipelines

English (B2/C1)

Tools

pgvector

Pinecone

Qdrant

Job description

Monterail is building a network of LLM Engineers to design, build, and integrate practical AI features into existing products. We offer flexible freelance opportunities, part-time or full-time, depending on project needs.

This role prioritizes delivery, not ML research, with an emphasis on engineering foundations and integrating AI into production systems using Python, Node.js, or Ruby.