Machine Learning Engineer

Reddit

San Francisco, CA · Remoteunknown$216,700–$303,400Posted Nov 5, 2026

About the role

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 130 million daily active unique visitors, Reddit is one of the internet’s largest sources of information. For more information, visit www.redditinc.com.

Job Duties: Design, build, and deploy industrial-level machine learning models to solve critical problems in ad ranking, bidding, and optimization. Take full ownership of the ML lifecycle, from ideation and research to building scalable serving systems and maintaining models in production. Perform systematic feature engineering to transform raw, diverse data into high-quality features that drive model performance. Work closely with product managers, data scientists, and engineers to translate business challenges into effective ML solutions. Improve the reliability and stability of our ML systems by building robust monitoring, alerting, and automated retraining pipelines. Research new algorithms, stay up-todate with state-of-the-art ML techniques, and contribute to the team’s strategy and roadmap. Part-time telecommuting is an option. Hybrid work from Reddit offices in San Francisco, CA.

Requirements: Master’s degree, or its foreign degree equivalent, in Computer Science, Robotics, Engineering (any field), or a related quantitative discipline and two (2) years of experience in the job offered or in any occupation in related field.

Special Skill Requirements: (1) PII Data handling; (2) Kafka Infrastructure; (3) Data governance; (4) Batch data pipeline; (5) SLOs; (6) Graph service; (7) ML models; (8) XGboost; (9) LLM; (10) Google Cloud Platform. Any suitable combination of education, training and experience is acceptable. Part-time telecommuting is an option. Hybrid work from Reddit offices in San Francisco, CA.

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

Submit a resume with references using the apply button on this posting or by email at: applicationsreview@reddit.com at Req.# 1016.298.4.

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 pay 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.

The base pay range for this position is: $216,700.00 - $303,400.00 USD

#LI-DNI

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.

Responsibilities

  • Design, build, and deploy machine learning models for ad ranking, bidding, and optimization.
  • Own the ML lifecycle from research and ideation through production deployment and maintenance.
  • Engineer features from raw, diverse data to improve model performance.
  • Collaborate with product managers, data scientists, and engineers to develop ML solutions.
  • Build monitoring, alerting, and automated retraining pipelines to improve system reliability.
  • Research ML algorithms and contribute to team strategy and roadmap.

Qualifications

  • Master’s degree or foreign equivalent in Computer Science, Robotics, Engineering, or a related quantitative discipline.
  • Two years of experience in the offered role or a related occupation.
  • Experience with PII data handling, Kafka, data governance, batch data pipelines, SLOs, graph services, ML models, XGBoost, LLMs, and Google Cloud Platform.

Benefits

  • Healthcare benefits and income replacement programs.
  • 401(k) with employer match.
  • Global benefits for workspace, professional development, and caregiving.
  • Family planning support and gender-affirming care.
  • Mental health and coaching benefits.
  • Flexible vacation, paid volunteer time off, and paid parental leave.
  • Equity in the form of restricted stock units.

Skills mentioned

Machine LearningXGBoostLarge Language ModelsGoogle CloudApache KafkaData PipelinesFeature EngineeringModel DeploymentModel MonitoringGraphQL

About Reddit

Reddit is the heart of the internet, where millions of people get together to talk about any topic imaginable. Share, vote, and decide what matters in everything from breaking news, to fandoms, lifehacks, gaming, sports, health, and the internet’s cutest animals. With over 100,000 subreddit communities about every topic you could think of (and thousands more you couldn’t), whatever it is, there’s a place for you on Reddit. Interested in joining our growing team? Check out redditinc.com/careers.

Social Networking Platforms1,001-5,000 employeesSan Francisco, California

H-1B sponsorship history

Historical employer filing data was found for Reddit. The employer record includes 452 historical certified applications. This is employer-level history, not a guarantee that this role currently offers sponsorship.