Jeff Hajewski

Reliable AI systems, evals, context, and performance economics.

I build reliable, measurable, economical AI systems.

AI systems engineer focused on reliable, economical LLM products. I currently lead company-scale AI infrastructure and training work at SAP, after building ML platforms at Noom and distributed inference systems at Salesforce.

I write and build around reliable agents, evals, context systems, runtime architecture, and performance economics.

Current focus

  • Reliable agent and LLM runtime systems
  • Evaluation and post-deployment monitoring
  • Context and retrieval systems that scale
  • Performance, latency, and cost economics

Selected projects

All projects

No essays are published yet. The first pieces will focus on the practical problems that make AI systems succeed or fail after the demo.

  • The eval pyramid for production agents
  • Context is a systems problem, not a prompt problem
  • What teams misunderstand about AI cost versus latency
  • Why enterprise AI pilots die after the demo

Contact

Email is the best path for serious conversations. You can also find the project work on GitHub.