AI Engineer (Europe) - contractor

Stack

Responsibilities

• ▹Own the architecture and delivery of production-grade LLM systems and classical ML solutions
• ▹Design, evaluate and optimize RAG pipelines (retrieval strategy, chunking, indexing, monitoring)
• ▹Build scalable LLM services and agentic workflows
• ▹Define architecture trade-offs (LLM vs traditional ML, fine-tuning vs RAG, hosted vs self-managed models) with a focus on latency, cost, scalability and reliability
• ▹Architect and optimize distributed GenAI and ML workloads on Databricks (Spark, MLflow)
• ▹Implement evaluation frameworks to measure quality, hallucination and performance
• ▹Productionize systems with CI/CD, monitoring, rollback and versioning
• ▹Independently design AI solutions tailored to client problems
• ▹Lead technical decisions in client engagements and contribute to pre-sales architecture discussions
• ▹Mentor team members and define GenAI and ML best practices

Requirements

• ▹5+ years of experience in Data Science or a related field
• ▹Proven experience delivering LLM-based systems to production (not only PoCs) and classical ML projects
• ▹Strong hands-on experience with RAG, agents and open-source LLMs
• ▹Deep understanding of system-level trade-offs (latency, cost, scaling, reliability) and optimizing production systems
• ▹Strong Python and SQL skills
• ▹Deep hands-on experience with Databricks and distributed computing (Spark), including performance optimization
• ▹Experience deploying scalable ML/LLM systems on AWS, Azure or GCP

Soft skills

About the company

Hiflylabs is a team of 250+ data and tech enthusiasts based in Budapest, working on projects worldwide from data engineering and data science to AI and application development. A mentoring system supports staff development.