Staff Machine Learning Engineer, Homefeed (AI)

Location: San Francisco, CA, US, or remote anywhere in the United States; in-office collaboration required 1–2 times per quarter. US-based applicants only.

Base salary: $189,308–$389,753 USD, plus equity eligibility.

Company

hirify.global is a visual discovery platform helping people find creative ideas and plan for meaningful experiences.

What you will do

• Own and advance a major technical area in automated recommendation research within Reflex.
• Build LLM agents that generate hypotheses, implement changes, run experiments, evaluate results, and learn from prior outcomes.
• Develop evaluations for agent behavior and research outputs to improve quality, reliability, and efficiency.
• Contribute to generative retrieval, including Semantic ID learning, evaluation, and integration into production recommendation systems.
• Move research ideas from prototypes through offline evaluation, online experimentation, and production launches.
• Improve ML infrastructure integrations, provide technical leadership, mentor engineers, and collaborate with research, recommendation, and infrastructure teams.

Requirements

• Bachelor’s degree in Computer Science, Machine Learning, or a related field, or equivalent practical experience.
• At least 8 years of experience building and shipping ML or AI systems, including substantial hands-on engineering and technical leadership.
• Experience building LLM agents or other agentic AI systems for complex tasks, with a clear approach to evaluating and improving performance.
• Strong ML fundamentals and depth in one or more areas including applied LLMs, representation learning, recommendation systems, retrieval, or ML systems.
• Experience taking research ideas into reliable production systems and evaluating impact through meaningful experiments.
• Strong software engineering skills, including maintainable system design, difficult component implementation, and thorough technical reviews.
• Experience leading a substantial technical area, making decisions under ambiguity, and collaborating across teams.
• Track record of mentoring engineers and improving the technical quality of a team’s work.
• Clear written and verbal communication, including the ability to explain technical tradeoffs to different audiences, and disciplined verification of AI-generated code, analysis, and conclusions.

Culture & Benefits

• Individual contributor role; prior people management experience is not required.
• Flexible working model with required in-person collaboration 1–2 times per quarter.
• Commitment to continued growth as a technical leader and opportunities to work across research, recommendation, and ML infrastructure.
• Equity eligibility and benefits provided to hirify.global employees.
• This position is not eligible for relocation assistance.