Reddit, Inc. · 1 month ago
Staff Machine Learning Engineer, Ranking and Personalization
United States
Full-time
Remote
Lead/Staff
$230K/yr - $322K/yr
8+ years expReddit is a community of communities, and they are seeking a Staff Machine Learning Engineer to build ranking and personalization systems. This role involves collaborating with cross-functional teams to design and ship advanced ranking models that enhance user engagement on the platform.
Social MediaConsumer GoodsDigital MediaPublishingCommunitiesConsumerContentNewsSocial Network
Responsibilities
Design and ship next-generation ranking and personalization models that power discovery of Dev Platform apps and games across Reddit surfaces
Partner with ML, DS, and product to define signals, APIs, and feedback loops for building, deploying, and iterating on ranking models
Explore and productionize new retrieval, ranking, and experimentation approaches that unlock new Dev Platform experiences
Champion model quality, reproducibility, and experimentation best practices — including offline evaluation, A/B testing, and monitoring for model health and degradation
Mentor engineers and lead technical discussions, shaping the long-term ranking and personalization modeling strategy for Dev Platform
Qualification
Required
8+ years of experience building and deploying ML models in production, particularly in ranking or personalization modeling, large-scale representation learning, or recommender systems
Proven track record working on cross-functional product teams (PM, Design, DS, Eng) where you owned end-user outcomes, not just models or infra, and shipped features that moved core product metrics
Strong domain knowledge in modern ranking and personalization techniques: user/item embeddings, multi-task learning, sequential modeling, or similar approaches applied at scale
Experience designing and implementing performant, stable, and efficient ML or ranking systems (recommendation, ads, search, feed, or similar high-throughput decision systems)
Strong organizational skills with the ability to prioritize, sequence, and de-risk work, keeping complex projects on schedule with a high attention to detail
BS in Computer Science or a related technical field, or equivalent practical experience
Comfortable with software engineering best practices: testing, code reviews, technical design docs, and clear documentation for other teams that depend on your systems
Entrepreneurial mindset: you are self-directed, comfortable in ambiguity, and biased toward action in fast-paced environments. You like 0→1 building, iteration, and learning from experiments and failures
Excellent communication skills: you collaborate effectively in a remote, cross-functional team, and can explain complex ML and ranking concepts to both technical and non-technical stakeholders
Preferred
Languages: Go, Python, C++ or any object oriented programming language
Libraries: Baseplate, GraphQL
Databases: Redis, Postgres, Memcached
Tools: Kubernetes, AWS, Docker, GCP
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
Equity in the form of restricted stock units
Commission (depending on the position offered)
Medical, dental, and vision insurance
401(k) program with employer match
Generous time off for vacation, and parental leave
Company
Reddit, Inc.
Reddit is the heart of the internet, where millions of people get together to talk about any topic imaginable.
1001-5000 employees
H1B Sponsorship
Reddit, Inc. has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
84%
Represents job field similar to this job
Engineering and Development
Product Management
Management and Executive
Marketing
Creatives and Design
Sales
Customer Service and Support
Accounting and Finance
Trends of Total Sponsorships
*2026 (35)
2025 (99)
2024 (63)
2023 (76)
2022 (70)
2021 (68)
2020 (39)
Funding
Current Stage
Public CompanyTotal Funding
$1.33BKey Investors
FidelityVy CapitalTencent
2024-03-21IPO
2021-08-12Series F· $410M
2021-02-08Series E· $367.95M
Leadership Team
Steve Huffman
CEO
Andrew Vollero
Chief Financial Officer
Recent News
Deccan Chronicle
2026-07-07
Social Media Today
2026-07-07
Company data provided by crunchbase