Proofpoint

Senior Applied AI Engineer

Proofpoint
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2 days ago
Remote, WorldwideSenior / Staff+
H1B Sponsor

Base Salary

$153k - $294k/yr

Responsibilities

  • Lead applied AI research projects from question framing through experimentation, measurement, and actionable decisions.
  • Build agentic systems that run long loops, improve automatically, and recover from failures.
  • Extend and maintain company-wide evaluation tooling with task suites, regression checks, and quality, cost, and speed analysis.
  • Work with third-party model APIs, open-weight models, GPU infrastructure, fine-tuning, and efficient serving.
  • Build prototypes, playgrounds, and APIs that let stakeholders test and learn from AI ideas.
  • Advise deployment teams on AI implementation, monitoring, and understanding production systems.
  • Evaluate and improve coding-agent performance against internal codebases.
  • Collaborate with stakeholders to identify meaningful research questions and mentor engineers.

Requirements

  • 5+ years of experience building software and ML systems, including recent hands-on LLM systems that progressed beyond prototypes.
  • Experience building agents that perform real work and handling failures in long-running agent workflows.
  • Experience with third-party model APIs, open-weight models, and self-hosted GPU infrastructure.
  • Experience with Kubernetes inference platforms, Flyte orchestration, LiteLLM, Langfuse, and internal evaluation and tracing tools.
  • Experience building reliable evaluations and understanding their potential to mislead.
  • Experience achieving strong results with hosted or self-hosted frontier models.
  • Strong Python skills and solid machine learning fundamentals.
  • Daily experience using Claude Code, Cursor, or similar coding agents while maintaining correctness and testing standards.
  • Preferred: experience fine-tuning or serving open-weight models, automated prompt and pipeline optimization, multi-GPU serving, MCP and tool protocols, cybersecurity use cases, open-source contributions, or publications.

Benefits

  • Competitive compensation and comprehensive benefits.
  • Flexible work environment with flexible time off.
  • Two paid Wellbeing Days and two paid Volunteer Days annually.
  • Three-week Work from Anywhere option.
  • Annual wellness and community outreach days.
  • Recognition, career development, and global collaboration and networking opportunities.
Proofpoint

About Proofpoint

1,001-5,000 employees

Intent-based protection for every human and every AI agent, across all data.

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