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4,644 ML Research & Training jobs

Open roles training and researching machine-learning models.

4.6K jobs
Reddit Backed by a16zBacked by Sequoia
149 views 2 weeks ago

Staff Machine Learning Engineer, Ads Foundational Representations

Open 138d 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
152 views 2 weeks ago

Staff Machine Learning Engineer, AI Security

Open 51d 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
90 views 2 weeks ago

Staff Machine Learning Engineer, Ads ML Efficiency

Open 34d 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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Reddit Backed by a16zBacked by Sequoia
99 views 2 weeks ago

Senior Machine Learning Engineer, Ads ML Efficiency

Open 16d RemoteNorth AmericaContractSenior 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

Senior ML engineer on Reddit's Ads ML Efficiency team, optimizing production ML workloads for speed, scalability, and cost — profiling bottlenecks across model execution, runtimes, GPU/memory, and infrastructure, then shipping improvements to inference and training. Core stack: Python, PyTorch, and GPU/inference tooling like CUDA and Triton.

AI CUDA Distributed Training GPU Machine Learning +8 skills
217K – 303K $
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