Reddit is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and

authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about.

With 100,000+ active communities and approximately 126 million daily active unique visitors, Reddit is one of the internet’s

largest sources of information. For more information, visit www.redditinc.com.

The Notifications Relevance team at Reddit is building the next generation of notifications focused on delivering the right

content to the right user at the right time using the right channel (push notification, email digest and in-app). We are the

second largest growth lever at Reddit and a core component to understanding how to delight our current user base and bring new

users to discover all that Reddit has to offer.

Redditors produce the most amazing content about every niche topic in the world. Leveraging machine learning and large-scale

system development, we process hundreds of millions of posts and user activities to provide personalized recommendations for tens

of millions of users. As a Senior Staff, you will design and build a large-scale system that powers end-to-end recommendation

systems at scale. You’ll work across multiple areas of the stack, including budget optimization, retrieval, ranking, features,

measurement, LLM-based answers, etc, partnering deeply with product, org leads, and other XFN to deliver reliable, high quality

systems that can help Reddit Notifications push the boundary on state of the art.

What You’ll Do

Contribute to advancing Reddit's growth by designing and implementing content discovery algorithms that prioritize a seamless

and highly personalized user experience.

Deeply understand the Reddit Notifications product and drive the vision for the notifications relevance team.
Enhance core recommendation capabilities, including candidate retrieval, ranking models, and budgeting optimization, while

designing and testing new pipeline components. You will also deploy ML models, integrate LLMs, and ensure robust monitoring

and smooth product integration throughout the process.

Serve as the primary ML domain expert, deploying state-of-the-art models at scale, driving architectural decisions, and

ensuring robust monitoring and smooth product integration across the engineering organization.

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.
Partner closely with senior leadership and cross-functional org leads to shape long-term roadmaps, balancing immediate

operational wins with strategic technical objectives.

Who You Are

10+ years of industry experience with deep expertise in large-scale recommendation systems, notifications experience

preferred.

Proven ability to identify key opportunities, define roadmaps and drive scalable improvement in notifications relevance.
Strong experience in building and deploying large-scale ML models using frameworks such as PyTorch or Tensorflow.
Experience working with LLM in production and utilizing generative AI to augment recommendation systems
Proficiency in object-oriented programming (Python, Golang).
Big Plus: experience with state of the art model architectures
Big Plus: 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

#LI-remote, #LI-JS5

Pay Transparency:

This job posting may span more than one career level.

In addition to base salary, this job is eligible to receive equity in the form of restricted stock units, and depending on the

position offered, it may also be eligible to receive a commission. Additionally, Reddit offers a wide range of benefits to

U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for

vacation, and parental leave. To learn more, please visit https://www.redditinc.com/careers/.

To provide greater transparency to candidates, we share base salary ranges for all US-based job postings regardless of state. We

set standard base pay ranges for all roles based on function, level, and country location, benchmarked against similar stage

growth companies. Final offer amounts are determined by multiple factors including, skills, depth of work experience and relevant

licenses/credentials, and may vary from the amounts listed below.

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.

During the interview, we will collect the following categories of personal information: Identifiers, Professional and

Employment-Related Information, Sensory Information (audio/video recording), and any other categories of personal information you

choose to share with us. We will use this information to evaluate your application for employment or an independent contractor

role, as applicable. We will not sell your personal information or disclose it to any third party for their marketing purposes.

We will delete any recording of your interview promptly after making a hiring decision. For more information about how we will

handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential

Employees and Contractors.

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. If, due to a disability, you need an accommodation during the interview

process, please let your recruiter know.

Role

Senior Staff Machine Learning Engineer, Notifications

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