Senior Machine Learning Systems Engineer, Reddit
Ads ML Experience Platform
$216.7-303.4k
Plus equity
Online platform for thoughts, experiences & discussions
Be an early applicant
Online platform for thoughts, experiences & discussions
1001+ employees
Be an early applicant
$216.7-303.4k
Plus equity
1001+ employees
Company mission
To empower communities, and make their knowledge accessible to all.
Role
Who you are
- 5+ years in infrastructure/platform engineering or large-scale distributed systems
- 2+ years of hands-on experience building and operating production ML infrastructure, developer SDKs, platform APIs, or self-service AI tooling
- Experience building workflow orchestration systems, developer platforms, or large-scale automation frameworks
- Experience with distributed data processing systems such as Spark, Flink, Ray, or equivalent technologies
- Experience with modern orchestration and workflow technologies such as Kubeflow, Argo, Airflow, or similar frameworks
- Experience building offline ML experimentation platforms, model registries, experiment tracking systems, or training orchestration frameworks
- Experience building and operating agentic AI systems, including multi-agent orchestration, autonomous workflows, and agent communication/runtime frameworks (e.g., MCP, A2A, and orchestration systems) is a strong plus
- Experience running end-to-end model development and iteration cycles at scale is a plus
What the job involves
- We are building the next generation of ML research tools and agentic AI platforms that power machine learning development across Reddit. Our mission is to accelerate the Ads ML lifecycle – from experimentation and training to deployment, evaluation, and autonomous operations – through scalable platform services, intelligent automation, and developer-centric tooling
- Our team owns critical platform capabilities including offline ML experimentation systems, production training orchestration frameworks, ML lifecycle automation and, agentic ML frameworks that enable faster model iterations
- We are looking for an experienced engineer with deep expertise in large-scale distributed systems, ML platforms, and emerging agentic architectures to help define and build the foundational tooling for the next generation of our machine learning devX tooling
- Design and build large-scale offline ML experimentation platforms that enable reproducible research, model development, evaluation, and promotion workflows
- Develop production-grade training orchestration frameworks supporting distributed training, hyperparameter optimization, model evaluation, and automated retraining
- Build infrastructure for experiment tracking, metadata management, lineage, artifact versioning, model registries, and reproducibility
- Partner with ML engineers and researchers to improve experimentation velocity and operational efficiency
- Build automated workflows for model promotion, rollback, compliance validation, and continuous evaluation
- Design and build an agentic AI execution platform supporting autonomous and human-in-the-loop workflows, including multi-agent orchestration, memory/context systems, and scalable workflow infrastructure
Our take
Reddits is an online platform that hosts thousands of message board communities (known as subreddits) designed to foster authentic human connection. With more than 130,000 communities covering everything from food, entertainment and sports, to niche interests for highly specific audiences, there's virtually a space for everyone.
The platform attracts over 120 million daily users and billions of monthly page views. While these figures are smaller than those of social media giants like Facebook and X, Reddit stands out by offering easily discoverable communities where users can dive deep into virtually any topic imaginable.
Today, Reddit continues to grow its user base and expand its reach, remaining a unique hub for conversation, connection and shared interests. With its strong community-driven model and steady revenue streams, it's most definitely positioned to stay a central part of online culture for years to come.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
57% employee growth in 12 months
Company
Funding (last 2 of 6 rounds)
Aug 2021
$410m
SERIES F
Feb 2021
$250m
SERIES E
Total funding: $1.2bn
Company benefits
- Comprehensive health benefits
- Flexible vacation & Reddit global days off
- Family planning funds & 4+ months paid parental leave
- Personal & professional development funds
- Paid volunteer time off
- Workspace & home office benefits
Company HQ
SoMa, San Francisco, CA
Leadership
Steve Huffman
(CEO & Founder)After co-founding Reddit in 2005, they stepped away from the company to co-found Hipmunk, where they were the CTO for 5 years. They returned to Reddit in 2015, and have been the CEO since.
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