LLM / Generative AI Developer

Location: 100% remote work (Poland)
Availability: ASAP / within 1 month

Position Overview

We are looking for an experienced LLM / Generative AI Developer with 5+ years of professional experience to design and deliver production-grade Generative AI solutions within a large-scale, long-term digital program. The role focuses on building advanced agentic systems and end-to-end GenAI platforms with strong emphasis on quality, safety, and scalability

Responsibilities

• Design and implement end-to-end GenAI solutions using Python

• Build agentic workflows using frameworks such as LangGraph, tool and function calling, MCP, and multi-agent orchestration

• Develop robust RAG pipelines including ingestion, chunking, embeddings, vector search, re-ranking, and grounding validation

• Implement memory strategies including short-term, long-term, summarised, and vector-based memory

• Integrate, benchmark, and evaluate multiple LLM models including GPT-4.x series and GPT-4o

• Develop structured output and tool-calling systems with strict schema enforcement

• Build evaluation frameworks covering hallucination detection, quality scoring, latency, and cost metrics

• Implement Responsible AI guardrails including input and output filtering, validation, and fallback strategies

• Collaborate closely with DevOps and LLMOps teams on deployment, monitoring, scaling, and cost optimisation

Requirements

• 5+ years of professional experience in software engineering or AI development

• Strong hands-on Python development skills (mandatory)

• Experience with GenAI frameworks such as LangChain, LangGraph, and CrewAI

• Deep understanding of agentic reasoning, orchestration patterns, and tool integration

• Experience with Azure OpenAI and Azure AI Foundry

• Familiarity with vector databases such as Azure AI Search, Pinecone, Weaviate, or OpenSearch

• Solid understanding of tokenisation, context windows, rate limits, and LLM cost optimisation

• Experience with API integration, async programming, and resilient error-handling patterns

• Strong knowledge of Responsible AI risks and mitigation techniques

Additional Expectations

• Production-first mindset with strong focus on observability, resilience, and scalability

• Ability to balance innovation with compliance, security, and safety requirements

• Strong documentation skills and ability to clearly communicate architecture and design decisions

Project Information

• Long-term project with a confirmed contract duration of 5 years

• Work within a mature digital development environment delivering large-scale web, app, and AI platforms

Offer

• B2B contract via Experis 

• Multisport card

• Private healthcare (Medicover)

• Access to an e-learning platform

• Group life insurance