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Reddit Backed by a16zBacked by Sequoia
112 views 2 weeks ago

Senior Staff Machine Learning Engineer, GenAI Platform

Open 144d RemoteNorth AmericaContractStaff 5 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Reddit is hiring a Senior Staff ML Engineer to lead the vision, architecture, and roadmap of its large-scale GenAI Platform, including the LLM Gateway (unified APIs, rate/token limits, intelligent failover), enterprise RAG, and agentic AI workflows. Core stack includes Kubernetes, AWS/GCP cloud infra, Terraform, Go, and Python, plus MLOps/LLMOps practices.

Agentic AI AI API AWS CI/CD +14 skills
293K – 410K $
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Reddit Backed by a16zBacked by Sequoia
116 views 2 weeks ago

Staff Machine Learning Engineer, Consumer

Open 144d RemoteNorth AmericaContractStaff 5 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Staff-level ML engineer at Reddit building end-to-end machine learning systems for consumer experiences — recommendations, search, notifications, content/user understanding, and LLM/GenAI-powered features — from research and modeling through large-scale production deployment, using Python, Golang, and frameworks like TensorFlow, PyTorch, and Hugging Face.

Agentic AI AI Airflow BigQuery Data Pipelines +22 skills
230K – 322K $
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Reddit Backed by a16zBacked by Sequoia
119 views 2 weeks ago

Staff Machine Learning Systems Engineer

Open 144d RemoteNorth AmericaContractStaff 5 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Reddit is hiring a Staff ML Systems/Infrastructure Engineer to build and lead the platform powering large-scale ML: MLOps lifecycle tooling, a graph ML codebase, GPU training performance tuning, and pipelines for graph data with billions of nodes. Core stack includes Python, PyTorch/TensorFlow, Ray, Kubernetes, GCP (BigQuery, GCS), Terraform, and Apache Beam/Spark.

AI BigQuery Cloud Data Warehousing Distributed Training +14 skills
230K – 322K $
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Reddit Backed by a16zBacked by Sequoia
117 views 2 weeks ago

Staff Machine Learning Engineer, Ads Foundational Representations

Open 136d RemoteEurope, UKContractStaff 5 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.

Build multimodal embeddings and LLM-based representations for Reddit Ads, using NLP/CV models to power relevance, targeting, and ranking systems.

AI Airflow Automation BigQuery Data Science +12 skills
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Reddit Backed by a16zBacked by Sequoia
109 views 2 weeks ago

Senior Staff Machine Learning Engineer, Feed Relevance

Open 83d RemoteNorth AmericaContractStaff 5 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Build and lead GenAI-powered recommendation systems that personalize Reddit’s feed for millions of users, shaping core ranking architectures and mentoring senior engineers.

AI Generative AI Machine Learning
266K – 372K $
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Reddit Backed by a16zBacked by Sequoia
125 views 2 weeks ago

Staff Machine Learning Engineer, AI Security

Open 49d RemoteNorth AmericaContractStaff 6 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Reddit is hiring a founding Staff Machine Learning Engineer on its AI Security team to lead the design, training, evaluation, and deployment of ML models that detect AI-related risks like prompt injection and jailbreaks. Day-to-day involves hands-on model development on Reddit's LLM Guardrails Platform using Python, PyTorch/TensorFlow, and distributed training pipelines, plus technical leadership

AI Data Lineage Data Pipelines Deep Learning Distributed Training +11 skills
230K – 322K $
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Reddit Backed by a16zBacked by Sequoia
79 views 2 weeks ago

Senior Staff Machine Learning Engineer, ML Understanding

Open 33d RemoteNorth AmericaContractStaff 5 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Leads Reddit's next-generation user understanding initiative: designing and building a unified user representation layer (large-scale embeddings, interest/behavior modeling, LLM-based profiles) that powers personalization across Feeds, Search, Notifications, and Ads. Core tech: production ML, LLMs/foundation models, and large-scale serving infrastructure.

AI API Embeddings Generative AI LLM +2 skills
266K – 372K $
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Reddit Backed by a16zBacked by Sequoia
77 views 2 weeks ago

Staff Machine Learning Engineer, Ads ML Efficiency

Open 32d RemoteNorth AmericaContractStaff 6 questions Licensed UK sponsor — This employer appears on the GOV.UK register of licensed sponsors for the Skilled Worker and related work routes. The licence belongs to the employer and is not a commitment to sponsor this role.Licensed NL sponsor — This employer appears on the IND public register of recognised sponsors for work and highly skilled migrants. The recognition belongs to the employer and is not a commitment to sponsor this role.H-1B sponsor history — This employer has had H-1B petitions approved by USCIS in the last five fiscal years, per the USCIS H-1B Employer Data Hub. The approval belongs to the employer and is not a commitment to sponsor this role.Canada LMIA employer — This employer was issued a positive Labour Market Impact Assessment by Employment and Social Development Canada in the last four quarters, through the High Wage, Global Talent or Permanent Resident streams. The approval belongs to the employer and is not a commitment to sponsor this role.
United States

Builds the infrastructure, tooling, and optimization systems that let Reddit's ML engineers train, evaluate, deploy, and serve models efficiently — improving GPU utilization, cutting infrastructure costs, and speeding up experimentation. Core stack: Python, systems languages, distributed training frameworks, and GPU/serving platforms.

AI Cloud C++ Data Pipelines Distributed Systems +10 skills
230K – 322K $
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