Lead AI Engineer

AI/ML

Lead AI Engineer

AI/ML
Centrum, Lisbon

emagine Polska

Full-time
Any
Senior
Hybrid

Job description

We are seeking a Lead AI Engineer (LLMs & Data Pipelines) to drive the design, integration, and operational excellence of LLM-powered capabilities across our platforms.

In this role, you will build intelligent features such as classification, extraction, summarization, and action orchestration powered by large language models. You will design embedding and retrieval pipelines (RAG, semantic search), create robust data pipelines for training and evaluation, and define clear evaluation metrics and quality gates to ensure reliable LLM behavior in production.

You will work hands-on with inference runtimes such as ONNX Runtime and TensorFlow Lite, benchmarking performance across CPU, GPU, NPU, and DSP environments, and optimizing deployments for latency, cost, and reliability—including in constrained or embedded systems. Collaborating with engineering, data, and MLOps teams, you will integrate models into real-world APIs and production systems while continuously experimenting with prompts, architectures, and model choices.

If you are passionate about turning advanced AI research into scalable, production-ready systems and enjoy balancing performance, accuracy, and operational constraints, this may be your next mission.

Overall responsibilities and duties:

  • Build and integrate LLM-powered features (classification, extraction, summarization, actions).

  • Integrate models with inference runtimes (such as ONNX Runtime, TensorFlow Lite / LiteRT).

  • Benchmark and validate model performance across different hardware backends (CPU, GPU, NPU, DSP).

  • Design embedding and retrieval pipelines (RAG, semantic search).

  • Create and maintain data pipelines for training and evaluation.

  • Define evaluation metrics and quality gates for LLM behavior.

  • Optimize inference for latency, cost, and reliability.

  • Integrate models into production systems and APIs.

  • Run experiments to evaluate prompts, models, and architectures.

Qualifications:

  • Strong experience with LLMs and NLP systems

  • Hands-on experience with embeddings and vector databases

  • Strong Python skills and ML frameworks

  • Experience building production data pipelines

  • Solid understanding of evaluation and regression detection

  • Experience with RAG architectures

  • MLOps or monitoring experience

  • Experience with model calibration and accuracy/latency trade-off analysis.

  • Hands-on experience deploying models on edge or embedded devices (constrained environments)

Tech stack

    English

    B1

    Portuguese

    C1

    Machine Learning (ML)

    advanced

    Classification (Data Science)

    advanced

    training

    advanced

    LLMs

    advanced

    Operational Excellence

    advanced

    Artificial Intelligence (AI)

    advanced

    Python

    advanced

    TensorFlow

    advanced

Office location

Published: 25.02.2026

Lead AI Engineer

Summary of the offer

Lead AI Engineer

Centrum, Lisbon
emagine Polska
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