[Hiring] Senior AI Engineer @Look4IT Sp. z o. o. (KRAZ: 7880)

Role Description

This is a remote position. We are looking for a Senior AI Engineer to join a team building and operating a production-grade LLM system used by real users. This is not a proof-of-concept project. You will be responsible for taking LLM-powered features from idea through development and deployment to continuous improvement, with a strong focus on answer quality, performance, observability, and cost efficiency. You will work with modern LLM technologies, including LangGraph, RAG, tool calling, Azure OpenAI, Gemini, and Claude, and have a real impact on how AI-powered products are built and operated in production.

• Build LLM-powered features end to end.
• Design and implement agentic flows, retrieval, and tool calling using LangGraph - then ship them as FastAPI services with streaming, persistence, and proper tests.
• Own answer quality.
• Build evaluation datasets, regression suites, and LLM-as-judge checks so we know whether a prompt or model change made things better before it reaches users.
• Get the right context to the model.
• Turn user questions into effective queries against our search platform, orchestrate multi-step research loops, and shape the context the model reasons over.
• When an answer is wrong, work out whether retrieval, the query, or the prompt is at fault - and fix the right one.
• Debug production.
• Instrument flows with tracing (Langfuse), investigate bad answers from real traces, and manage latency, token, and cost budgets - including routing across model sizes and families behind an AI gateway.

Qualifications

• Experience in building and operating backend services - APIs, async, testing.
• Hands-on experience taking LLM features to production and keeping them running - not only prototypes.
• Agent/orchestration frameworks - LangGraph ideally.
• Practical RAG experience.
• Experience debugging LLM systems in production - tracing, evaluation, cost, and latency.
• Experience running services in the cloud (we're on Azure).
• Strong problem-solving skills, analytical thinking, and technical decision-making.
• Fluent in English, proactive communicator, and a collaborative team player.
• Open-minded, creative, and motivated to push boundaries in AI and automation.

Requirements

• Nice to have:
• Azure OpenAI, AI Search, App Service.
• Infrastructure-as-code (Bicep).
• Mentoring or tech-lead experience.

Tech stack

• Python
• FastAPI
• LangGraph
• Azure OpenAI, Google Gemini, Anthropic Claude
• FAISS
• PostgreSQL
• Langfuse
• Azure App Insights
• Bicep
• Docker/Podman

Benefits

• B2B contract
• 100% remote work
• Long-term engagement
• Work on a live LLM product
• Modern AI/LLM technology stack
• Flexible working environment