[Hiring] Senior Staff ML Engineer, Search & Recommendation @Reddit

Role Description

The Search Recommendations & Relevance team at Reddit is building the next generation of search - one that goes beyond “10 blue links” to deliver real answers, perspectives, and conversation from the world's largest corpus of human conversation. As a Senior Staff, you will design and build a large-scale system that powers end-to-end search relevance at scale. You’ll work across multiple areas of the stack, including:

• Query understanding
• Retrieval
• Ranking
• Features
• Measurement
• LLM-based answers
• RAG

You will partner deeply with product, org leads, and other XFN to deliver reliable, high-quality systems that can help Reddit Search scale to billions of users.

What You’ll Do

• Contribute to advancing Reddit's Search and Recommendations products by designing AI-driven Search experience prioritizing seamless and delightful user experience.
• Deeply understand the Reddit search product and drive the vision for the search relevance team.
• Enhance core search retrieval and ranking, design and implement new search engine features, build and scale search indexes, develop and test new pipeline components.
• Deploy ML models, integrate LLMs, and ensure robust monitoring and smooth product integration throughout the process.
• Collaborate across disciplines and with ML, Product, Infrastructure, and DS teams at Reddit to find technical solutions to complex challenges.
• Mentor and guide senior and staff engineers in the team.
• Influence org-wide technical direction and partner closely with senior leadership to shape the long-term roadmap.

Qualifications

• 10+ years of industry experience with deep expertise in large-scale search and recommendation systems.
• Proven ability to identify key opportunities, define roadmaps, and drive scalable improvement in search relevance.
• Strong experience in building and deploying large-scale ML models using frameworks such as PyTorch or Tensorflow.
• Experience working with LLM in production, including evaluation, tuning, and deployment.
• In-depth knowledge and experience working with lexical and semantic retrieval systems.
• Proficiency in object-oriented programming (Python, Golang).
• Nice to have: experience building production Agentic AI frameworks.

Benefits

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k with Employer Match
• Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
• Family Planning Support
• Gender-Affirming Care
• Mental Health & Coaching Benefits
• Flexible Vacation & Paid Volunteer Time Off
• Generous Paid Parental Leave

Pay Transparency

This job posting may span more than one career level. The base salary range for this position is:

$266,000 — $372,400 USD

In select roles and locations, the interviews will be recorded, transcribed, and summarized by artificial intelligence (AI). You will have the opportunity to opt out of recording, transcription, and summarization prior to any scheduled interviews.

Reddit is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve. Reddit is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures.