Kiefer
Open positions
ML Engineer — ASR
ML Engineer improving automatic speech recognition for Kiefer's Sophea Meet: training/fine-tuning ASR models on real meeting audio, building benchmarks and error analysis, and improving production inference (accuracy, latency, cost). Core stack is Python with PyTorch/JAX/TensorFlow; English first, Greek next.
ML Engineer — Robotics
Develops and deploys ML models for physical robots — navigation, perception, and learned policies on a Unitree fleet (Go2, G1, H1, B2) with NVIDIA Jetson compute. Day to day: training/evaluating models, building data and evaluation pipelines, integrating with sensors and control systems, and testing sim-to-real on real hardware.
ML Engineer — Agents & LLMs
ML engineer improving the agent and long-context LLM capabilities behind Kiefer's AI products: runs post-training experiments (SFT, preference optimization, RL), builds benchmarks and verifiers for multi-step agents, curates training data, and hardens inference for production. Core stack is Python with PyTorch/JAX/TensorFlow.
MLOps Engineer
Builds the ML infrastructure at KIEFER (Athens) powering Sophea AI, a RAG platform, robotics, and the Hyperion X energy trading platform: training/fine-tuning pipelines, dataset and model versioning, automated evaluation, deployment with rollout/rollback, GPU scheduling, and production monitoring. Core stack: Python, Linux, containers, CI/CD, GPU tooling.
Payroll & HR Operations Specialist
About the company: KIEFER is building Greece's integrated AI ecosystem. From renewable energy infrastructure and AI systems to robotics and enterprise applications, we connect the technologies that power Europe's…
Project Manager (BESS)
KIEFER TEK, a Greek renewable-energy EPC contractor, seeks a Project Manager to own utility-scale battery energy storage (BESS) projects end to end — from contract award through engineering, procurement, construction, commissioning and handover. Head-office role in Athens with selective site visits, focused on schedule, budget, contracts and client management.
Senior Enterprise Sales Director, Energy & Grid Infrastructure
About the company: KIEFER is building Greece's integrated AI ecosystem. From renewable energy infrastructure and AI systems to robotics and enterprise applications, we connect the technologies that power Europe's…