Kiefer Tech

Machine Learning Engineer, Robotics

AI Computer Vision C++ Deep Learning Machine Learning +2 skills

Greece

ML Engineer in Athens building learning-based capabilities for physical robots (Unitree Go2/G1/H1/B2 fleet on NVIDIA Jetson compute): training and evaluating models for navigation, perception, planning and robot behavior using imitation learning, RL and vision-language-action approaches, with data/sim pipelines and integration and testing on real hardware.

Machine Learning Engineer, NLP (Polish)

AI Data Pipelines Fine Tuning Go-to-Market JAX +7 skills

Poland

ML Engineer improving how language models perform for Polish users: measuring model quality on real product tasks, building Polish-language datasets and evaluations, fine-tuning/post-training models, and setting up regression tests and monitoring. Stack centers on Python, PyTorch/JAX/TensorFlow, and LLM/NLP evaluation and adaptation.

Machine Learning Engineer, Automatic Speech Recognition

AI Data Pipelines Deep Learning Fine Tuning JAX +5 skills

Greece

Machine learning engineer owning the ASR improvement loop for Kiefer Tech's Sophea Meet meeting-transcription product: training/fine-tuning speech recognition models on real meeting audio, building benchmarks and error analyses, and improving production inference. Python with PyTorch/JAX/TensorFlow; English focus first, then Greek.

Machine Learning Engineer, Agents & LLMs

AI Distributed Training Fine Tuning JAX LLM +5 skills

Greece

ML Engineer improving agent and long-context LLM capabilities behind Kiefer Tech's AI products: running post-training experiments (SFT, preference optimization, RL), designing multi-step agents, building benchmarks/verifiers and training data, and moving results to production. Stack centers on Python with PyTorch/JAX/TensorFlow.