Senior Machine Learning Engineer at Reddit

Confirmed open

Reddit is hiring a remote Senior Machine Learning Engineer to build production recommendation, search, ranking and advertising systems. The listing covers Remote - United States.

Reddit

Location: Remote
Work arrangement: remote
Technologies: Python, Java, PyTorch, TensorFlow, Go

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Role overview

Reddit’s machine-learning engineers build production systems that help millions of people discover and engage with conversations. The team works across Consumer and Ads organisations on recommendations, search, ranking, advertising and marketplace problems.

Responsibilities

Design and build end-to-end machine-learning systems from research and modelling through production deployment.
Develop recommendation, search and ranking systems that surface relevant content and communities.
Build advertising systems for ranking, bidding, measurement and optimisation.
Create representations and signals for content, advertisers and users at large scale.
Partner with product and engineering teams to define metrics, run experiments and improve reliability.
Monitor production models, investigate quality or performance regressions and iterate on deployed systems.

Qualifications

Strong software engineering and machine-learning experience delivering production systems.
Experience with modelling, experimentation, data pipelines and deployment at large scale.
Ability to translate ambiguous product problems into measurable ML objectives and reliable services.
Strong programming, statistics and data-analysis skills and familiarity with modern ML frameworks.
Clear communication and ability to collaborate across distributed, cross-functional teams.
Interest in recommendation, search, relevance, advertising, marketplace or user-understanding systems.

Technology in this role

Python: Python Java PyTorch TensorFlow .
Java: Python Java PyTorch TensorFlow .
PyTorch: Python Java PyTorch TensorFlow .
TensorFlow: Python Java PyTorch TensorFlow .
Go: Python Java PyTorch TensorFlow .
Redis: • Familiarity with distributed systems and large-scale data processing (Spark, Kafka, Ray, Airflow, BigQuery, Redis, .
Kafka: • Familiarity with distributed systems and large-scale data processing (Spark, Kafka, Ray, Airflow, BigQuery, Redis, .
Spark: • Familiarity with distributed systems and large-scale data processing (Spark, Kafka, Ray, Airflow, BigQuery, Redis, .
Airflow: • Familiarity with distributed systems and large-scale data processing (Spark, Kafka, Ray, Airflow, BigQuery, Redis, .
LLM: • Applied AI and LLM-driven experiences that improve relevance, discovery, and user .
RAG: • Experience with LLM/Gen AI techniques, including but not limited to LLM evaluation, alignment, fine-tuning, knowledge distillation, RAG/agentic systems and productionizing LLM-powered products at .
BigQuery: • Familiarity with distributed systems and large-scale data processing (Spark, Kafka, Ray, Airflow, BigQuery, Redis, .

Role-specific candidate guide

Preparation notes based on the employer’s stated responsibilities and qualifications.

Understanding the scope. This Senior Machine Learning Engineer position at Reddit is best assessed through the work described in the employer’s posting, rather than the title alone. The available role overview says: “Reddit’s machine-learning engineers build production systems that help millions of people discover and engage with conversations. The team works across Consumer and Ads organisations on recommendations, search, ranking,…” Read that statement together with the responsibilities below to understand the likely balance between delivery, coordination and technical decision-making. The role.

Benefits

Comprehensive Healthcare Benefits and Income Replacement Programs
Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support
Mental Health & Coaching Benefits
Flexible Vacation & Paid Volunteer Time Off
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:
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.

About Reddit

Reddit is a community platform with more than 100,000 active communities. Its machine-learning teams support discovery, relevance, advertising and marketplace experiences.

Employer website

How to apply

Review the original posting and apply through the employer’s careers page.

View source and apply

Source checked: 2026-10-13

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