ML Engineer, LLM Agents & Production Systems

Kiefer; Ohio; On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Competitive compensation

Autonomy and engineering-first culture

Hands-on AI product impact

Job summary

KIEFER is seeking an ML Engineer to advance agent and long-context LLM capabilities behind Kiefer Tech’s AI products. You will work hands-on across post-training, data, evaluation, agent design, and inference, with the goal of making multi-step tasks more reliable in production.

Join a fast-moving, AI-native environment with room to shape models, tooling, and deployments while maintaining high autonomy and rigorous regression checks.

Qualifications

• 3+ years of ML or research engineering with demonstrable results.
• LLM post-training experience in supervised fine-tuning, RL, or similar.
• Experience building agent systems with tool use and multi-step execution.
• Strong model/agent evaluation and data curation skills.
• Proficient Python and ML frameworks; solid software engineering.
• Experience with LLM inference performance and cost.

Responsibilities

• Run post-training experiments across methods (SFT, RLHF, etc.).
• Improve agent planning, tool use, execution, and error recovery.
• Build benchmarks, verifiers, and diagnostic tools.
• Generate and curate training data including trajectories.
• Evaluate long-context behavior and memory retrieval.
• Collaborate to production with regression checks.

Skills

ML experience

LLM post-training

Agent systems

Python

ML frameworks

Tools

PyTorch

JAX

TensorFlow

Python tooling

Job description

KIEFER is seeking an ML Engineer to advance agent and long-context LLM capabilities behind Kiefer Tech’s AI products. You will work hands-on across post-training, data, evaluation, agent design, and inference, with the goal of making multi-step tasks more reliable in production.

Join a fast-moving, AI-native environment with room to shape models, tooling, and deployments while maintaining high autonomy and rigorous regression checks.