Staff Machine Learning Engineer, AI Security

🕒 Setembro 15

🇺🇸 Estados Unidos – Remoto (EUA)

💵 $230.000 - $322.000 / ano

⏰ Tempo Integral

🔴 Especialista

🤖 Engenheiro de IA

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Reddit, Inc.

SiteLinkedInTodas as Vagas

501 - 1000 funcionários

Fundada em 2005

💼 Consultoria

📣 Marketing

📱 Mídia

Consulting • Marketing • Media

Reddit, Inc. é uma plataforma de mídia social que funciona como um hub para milhares de comunidades, onde os usuários podem participar de conversas diversas, que vão de notícias de última hora a interesses de nicho. Ela permite que usuários publiquem, comentem e votem em conteúdos, fomentando uma comunidade online vibrante. Milhões de pessoas no mundo todo se conectam e compartilham suas paixões no Reddit, criando um ambiente dinâmico para interações humanas autênticas.

Descrição

• Select, adapt, fine-tune, evaluate, and deploy pretrained models and lightweight classifiers for Reddit-specific security problems • Build reproducible training and evaluation pipelines on Reddit’s ML platform • Partner with platform engineers to improve inference performance, resource efficiency, and operational reliability • Set the technical vision and multi-quarter modeling roadmap • Gather requirements, define model architectures, and iterate on model development with cross-functional teams • Conduct model evaluations and performance analysis to improve accuracy and adversarial robustness • Define launch criteria balancing false positives, latency, throughput, reliability, and cost • Own training-data quality and the production model lifecycle • Use monitoring, incident findings, and red-team feedback to guide dataset improvements, retraining, and safe rollout or rollback • Establish best practices for responsible ML development and deployment, including reproducible experiments, testing, model and data lineage, and privacy-aware data use • Stay current with research in NLP, large language models, and relevant multimodal techniques • Mentor engineers and lead technical discussions and reviews

🎯 Requisitos

• 8+ years of experience developing machine learning models, with substantial hands-on model training experience, demonstrated production impact, and a record of leading complex initiatives across teams • Strong background in Python programming, software engineering, and deep learning frameworks and libraries such as TensorFlow, PyTorch, or Hugging Face Transformers • Deep understanding of neural network architectures and optimization, with proficiency in data preprocessing, tokenization, embeddings, language modeling, and model calibration • Expertise in scalable data pipelines and distributed training frameworks such as Ray Train or PyTorch Distributed, with a strong understanding of hardware and system tradeoffs • Demonstrated rigor in experimental design and model evaluation, including representative holdouts, ablation studies, adversarial tests, and error analysis to diagnose training issues, bias, and generalization gaps • Excellent written and verbal communication, with the ability to explain model behavior, security risk, uncertainty, and tradeoffs to technical and non-technical partners • Preferred: Experience applying ML to security, trust and safety, fraud, privacy, or related adversarial domains • Preferred: Experience with adversarial training, model distillation, active learning, or synthetic-data generation

🏖️ Benefícios

• 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 • Equity in the form of restricted stock units • Medical, dental, and vision insurance • Flexible vacation and parental leave