LLM Engineer - Freelancer
Offer summary

(Summary generated by AI based on the full job description)

The project focuses on integrating AI into products by delivering LLM-powered features. Key technologies are Python, Node.js, Ruby, LLM APIs (OpenAI, Anthropic, Azure) and vector stores (pgvector, Pinecone, Qdrant). Responsibilities include building chat, summaries, classification, smart search and document Q&A, designing lightweight RAG pipelines, implementing reliable LLM endpoints and advising clients on AI trade-offs. Freelance role, 15–40 hrs/week, remote and flexible.

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LLM Engineer - Freelancer

Company: Monterail Sp. z o.o.

from: 3 November 2026
to: 3 December 2026
salary not specifiedB2B contract (full-time, part time)
Offer parameters
level:mid • senior
working mode:remote
Gdańsk, Pomeranian
Gdańsk, Pomeranian

Requirements

Optional technologies

Python
Node.js
Ruby
OpenAI
Anthropic

Our requirements

  • Strong software engineering background - 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 operate independently with clients, take ownership of delivery, and set realistic expectations
  • English B2/C1
  • Availability of 15-40 hours per week (B2B contract)

Optional

  • Background in big data or data pipelines is a big plus

Your responsibilities

  • Deliver AI functionality within 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
  • Leverage vector DBs (pgvector, Pinecone, Qdrant)
  • Implement safe, reliable LLM endpoints (OpenAI, Anthropic, Azure)
  • Collaborate 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

About the project

We're building a network of LLM Engineers who can design, build, and integrate practical AI features into existing products. We're looking for people to collaborate with on a freelance basis - part-time or full-time, depending on project needs.
This role is focused on delivery, not ML research. What matters most is your engineering foundation and your ability to integrate AI into real production systems using Python, Node.js, or Ruby codebases.

This is how we organize our work

This is how we work

in houseagilescrum

Team members

backend developerfrontend developerproduct ownerscrum master

This is how we work on a project

  • functional tests
  • integration tests
  • performance tests
  • test automation
  • unit tests
  • manual tests
Company

Benefits

  • Freelance
  • Flexible hours
  • Remote location
  • Project selection

Monterail Sp. z o.o.

We are Monterail - a team of ~ 130 experts working together to create meaningful software.
As a software agency, we collaborate with multiple clients.
We specialise in 4 main industries Fintech, MedTech, HRtech & E-commerce.
We work onsite and remotely!

This is how we work

LLM Engineer - Freelancer
I apply to:
Monterail Sp. z o.o.
Gdańsk, Pomeranian
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