Senior Applied AI Engineer
Proofpoint2 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.
Tech Stack
Categories
About Proofpoint
Intent-based protection for every human and every AI agent, across all data.