CareerPlan

Senior | Staff Software Engineer - AI / ML

San FranciscoFull-time$208k2026-09-26 → 2026-11-11

Core

Build faster, cheaper, and more rigorous ML evaluation systems for frontier AI agents and models.

Role type

Senior Staff Software Engineer (AI/ML)

Builds

Adaptive sampling systems, AI model routing gateways, fine-tuned small models, predictive difficulty estimators, and golden datasets for AI evaluation.

Domain

Frontier AI, LLM evaluation, Agentic AI systems

Deliverable

production ML models

Required skills

Python, system design, statistics, experiment design, hypothesis testing, sampling, confidence intervals, LLM/ML workload management, non-deterministic system reasoning, evaluation design

Preferred skills

Fine-tuning open-weight models (LoRA), building LLM evaluation platforms, agentic workloads, RL environments, research-to-production track record

Technologies

Python, LoRA, LLMs

Responsibilities

Design adaptive sampling and early stopping strategies for long-horizon agent evaluations; Build model routing systems to optimize cost and quality; Fine-tune and serve parameter-efficient models; Develop predictive models for task difficulty; Create golden datasets and quantify LLM-as-judge accuracy; Convert research prototypes into reusable production components.

Seniority

Senior, hands-on IC with strategic impact