Sam Bretz

Founding AI engineer at Metergraph, helping teams cut LLM spend without losing quality.

Metergraph reads production traces from tools like Langfuse, LangSmith, Braintrust and OpenTelemetry, classifies workloads, and replays them on candidate models against evals to produce evidence-backed model-swap recommendations. Before that I built the core of AG2's agent platform, and before that worked on platform, data and distributed systems, from surgical video pipelines to enterprise identity graphs. I write here about engineering, AI tooling and whatever else I am curious about.

• Career
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Now

• 2026 to nowMetergraph, founding AI engineer and agent supervisor

Before

• 2025 to 2026AG2, staff engineer, AI systems
• 2023 to 2025Veza, senior engineer, platform
• 2022Sieve, founding engineer
• 2021 to 2022Automox, senior engineer, data platform
• 2018 to 2021Intuitive Surgical, software engineer, surgical data

Writing

First posts are on the way.