Senior Software Engineer, ML Ranking Platform - Reddit

About Reddit

Reddit is a vast community of communities, built on shared interests, passion, and trust, fostering the most open and authentic conversations online. Users submit, vote, and comment on topics they care about, making Reddit a significant source of information with over 100,000 active communities and approximately 126 million daily active unique visitors. For more information, visit www.redditinc.com.

About the ML Ranking Platform

The ML Ranking Platform is the core engine behind how millions of users discover content on Reddit daily. It powers over 40 Reddit products, including the home feed, search, subreddit feeds, and push notifications. The platform operates a scatter-gather ranking orchestration service that coordinates contextualized and personalized ranking, providing Product Engineers and ML Modeling Engineers with a platform to develop ranking, recommendation, and personalization products that delight, engage, and retain users.

How You'll Have Impact

As a Senior Software Engineer on the ML Ranking Platform team, you will be instrumental in designing, implementing, and maintaining highly robust, scalable, reliable, and performant ranking systems that power personalized feeds, search, and other products at Reddit's scale. You will drive and deliver high-impact projects, building the ranking engines that orchestrate workflows for a reliable and performant ML-based system. Your work will not only shape Reddit's feeds but also influence how communities connect, grow, and thrive across the platform.

Key Responsibilities:

• Design and implement the next generation ML ranking system powering personalized feeds, search, and other key Reddit products.
• Design and develop ML and Generative AI systems within cloud-based production environments at scale.
• Partner closely with Product, Infrastructure, and Engineering teams to translate requirements into scalable ML systems.
• Write efficient, scalable, and maintainable code to facilitate rapid and safe iteration.
• Champion and drive engineering processes and best practices.
• Elevate engineering standards across the team through code reviews, mentorship, and knowledge sharing.

Who You Might Have:

• 5+ years of experience as a software engineer developing large-scale distributed systems and data-intensive ML-based systems, using Go, Python, C++, or any object-oriented programming language.
• 5+ years of experience designing and implementing large-scale, performant, and reliable machine learning systems. Experience with recommendation systems is preferred.
• Experience developing and improving tools for deployment, automation, system diagnosis, ML monitoring, etc.
• Strong organizational skills with the ability to prioritize tasks, keep projects on schedule, and maintain a high level of attention to detail.
• BS degree in Computer Science, a similar technical field of study, or equivalent practical experience.
• Familiarity with software engineering best practices such as unit testing, code reviews, design, and documentation.
• An entrepreneurial spirit: self-directed, innovative, biased towards action in fast-paced environments, and comfortable building new things and learning from ambiguity and failure.
• Excellent communication skills, with the ability to collaborate effectively in a fully remote environment and discuss complex topics with both technical and non-technical audiences.

Benefits:

• Comprehensive Healthcare Benefits and Income Replacement Programs
• 401k with Employer Match
• Global Benefit programs tailored to your lifestyle, including workspace, professional development, and 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 multiple career levels. In addition to base salary, this job is eligible for equity in the form of restricted stock units and may be eligible for commission, depending on the position offered. Reddit offers a comprehensive benefits package for U.S.-based employees, including medical, dental, and vision insurance, a 401(k) program with employer match, generous time off for vacation, and parental leave. For more details, visit https://www.redditinc.com/careers/.

Base Salary Range (U.S. Based):
$216,700—$303,400 USD

Final offer amounts are determined by multiple factors including skills, depth of work experience, relevant licenses/credentials, and may vary from the amounts listed.

AI in Interviews

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Equal Opportunity Employer

Reddit is proud to be an equal opportunity employer committed to building a workforce representative of the diverse communities we serve. We are committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If you require an accommodation due to a disability during the interview process, please notify your recruiter.