Ad Tech and Ranking

539 open positions

Sr Applied Scientist, Sponsored Products and Brands Ads Response Prediction AmazonPalo Alto, California, United States $167k–$167k5mo Building real-time machine learning services to connect shoppers with relevant ads across Amazon platforms, optimizing response prediction for Sponsored Products and Brands.
Member of Technical Staff (Machine Learning Research Engineer) PerplexityBerlin, Deutschland 5mo Architect and build core components of the search platform and model stack, designing, training, and optimizing large-scale deep learning models for retrieval and ranking.
Member of Technical Staff (Machine Learning Research Engineer) PerplexityBerlin 5mo Building next-generation advanced search technologies, specifically focusing on retrieval and ranking systems.
Sr. Applied Scientist, Ads AI Core Infrastructure AmazonNew York, New York, United States $167k–$167k5mo Research and develop novel approaches for agent-data interaction, specifically optimizing real-time access to advertiser data via Model Context Protocol (MCP) servers using generative AI and agentic systems.
Senior Applied Scientist, Personalization, Personalization Strategic Initiatives Science AmazonTel Aviv-Yafo, Tel Aviv, Israel 6mo Lead research, design, and development of new AI technologies for personalization, specifically focusing on recommendations and large language models to impact millions of customers.
Applied Scientist Manager, Worldwide Returns & ReCommerce AmazonBellevue, Washington, United States $184k–$249k6mo Manage a team of scientists and machine learning engineers to develop products and operational solutions for Amazon's returns and re-commerce ecosystem, aiming to reduce waste and optimize product reuse.
Applied Scientist, Intelligent Talent Acquisition - Lead Generation & Detection Services AmazonEdinburgh, Scotland, United Kingdom 6mo Design and build machine learning recommendation systems to match job seekers with opportunities and recruiters with talent at global scale.
Staff Applied Scientist (Perm or Contract) PermutiveLondon, England $180k–$180k6mo Design and build models for campaign optimisation, audience quality modelling, inventory allocation, and measurement in programmatic advertising to improve CTR, CPA, and ROAS.
Applied Scientist, SPX AI Lab AmazonSeattle, Washington, United States $143k–$193k6mo Building production-grade agentic AI systems and multi-agent tools to empower Amazon sellers with proactive, autonomous assistance.
Sr Principal Data Scientist, Search and Recommendations IngrammicroIrvine, CA, United States of America $159k–$159k6mo Drive the science and strategy behind global Search and Recommendation systems to improve discovery, relevance, and commercial outcomes for an enterprise ecosystem.
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Machine Learning Engineer Graduate (Global E-Commerce, Platform Governance) - 2026 Start (PhD) Singapore 7mo PhD-level ML engineer building risk detection algorithms, graph learning platforms, and sequence models to govern e-commerce ecosystem health, identify low-quality entities, and optimize product experiences.
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Machine Learning Engineer Graduate (Global E-Commerce, Search) - 2026 Start (PhD) Singapore 7mo Building the search algorithm and ranking system for a global e-commerce platform serving over 1 billion monthly users using large-scale machine learning, NLP, and multi-modal technology.
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Machine Learning Engineer Graduate (Global E-Commerce, User Growth & Intelligent Marketing) - 2026 Start (BS/MS) Singapore 7mo Building algorithm and big data solutions for e-commerce innovation, including recommendation, search, risk control, intelligent customer service, and logistics optimization to help users discover products and improve merchant operations.
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Machine Learning Engineer Graduate (Global E-Commerce, Recommendation) - 2026 Start (PhD) Singapore 7mo Building large-scale e-commerce recommendation algorithms and systems for commodity, live stream, and short video recommendations to improve user engagement and conversion.
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AI Machine Learning Engineer Graduate (Search) - 2026 Start (PhD) Singapore 7mo Building a full-stack search engine system combining information retrieval with modern machine learning methods (NLP, CV, Multimodal, Recommender Systems) to serve users on platforms like TikTok and Douyin.
Principal Data Scientist The-Nielsen-CompanyBangalore, in 7mo Architecting the long-term technical vision for AI/ML ecosystems, specifically focusing on media understanding, generation, and multimodal data foundations for global entertainment metadata.
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Senior Machine Learning /Senior Reinforcement Learning Engineer Singapore 7mo Designing, building, and scaling production-grade ML/RL systems to streamline operations and elevate customer experience through intelligent automation.
Senior Data Scientist SmartlyBerlin, Deutschland 7mo Building and deploying scalable AI/ML solutions to optimize ad creatives and campaigns for advertisers.
Data Science Manager TeadsParis, Ile-de-France 8mo Lead the Data Science & AI team to build and operate large-scale distributed machine learning systems for real-time advertising auctions.
Sr. Applied Scientist, Amazon Ads AmazonSeattle, Washington, United States $167k–$167k9mo Research and implement cutting-edge ML approaches including generative AI and large language models to transform the advertising life cycle, from ad creation and optimization to performance analysis.
Applied Scientist, AWS Neuron Science Team AmazonSanta Clara, California, United States $172k–$222k9mo Enhancing the software stack for AWS Trainium and Inferentia accelerators to accelerate customer adoption of ML hardware.
Senior Applied Scientist, Translation Services AmazonHyderabad, Telangana, India 11mo Designing algorithmic solutions based on data and mathematics to translate billions of words annually across 130+ locales for Amazon's international marketplaces, minimizing human touch in translation.
Principal Applied Scientist, Advertiser Growth, Amazon Sponsored Products & Brands AmazonPalo Alto, California, United States $179k–$179k11mo Leading the science roadmap for agentic AI applications that provide recommendations and guidance to millions of Amazon advertisers across multiple channels.
Principal Engineer Consultant in Adtech - Data Science & AI Department TeadsParis, Ile-de-France 11mo Designing and advising on large-scale distributed machine learning systems for real-time advertising auctions, handling 1B predictions per second.
Sr. Applied Science Manager, Perfect Order Experience (POE) AI AmazonSeattle, Washington, United States $219k–$296k1y Lead AI initiatives to ensure a perfect order experience for Amazon customers by developing domain-specific LLMs and risk detection systems.
Applied Machine Learning Internship Crossing Minds RecruitingParis, Ile-de-France 2y Develop recommender system solutions by exploring datasets, training models, and delivering tailored recommendations to customers.
Staff Applied Scientist (Perm or Contract) PermutiveRemote ( $180k–$180k Design and build models for campaign optimisation, inventory allocation, and audience quality modelling in programmatic advertising to improve CTR, CPA, and ROAS.
AI Research Engineer Creatify AIRemote friendly Develop and shape industry-leading AI video ad models for an end-to-end AI advertising agent that automates video ad lifecycle from scripting to publishing.
Senior Applied Data Scientist – Microsoft Advertising Microsoft Building identity graphs using research techniques to perform cross-device user stitching and construct large-scale identity models.
Senior Applied AI/ML Scientist - Compass FaireOwn the science and technical north star for Compass’s agentic products — the re $180k–$180k Science and technical lead for Compass, an agentic AI retailer assistant that helps independent retailers make smarter buying decisions using Faire's proprietary data.
Data Science Manager TatariHybrid RTO of 2 days per week. THIS IS AN IN-OFFICE POSITION $160k–$220k Lead a small team of data scientists to build and manage customer-facing AI/ML features and LLM-powered systems for TV advertising automation.
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Machine Learning Tech Lead - Feed Personalization, Quora (Remote) Remote Designing and optimizing recommendation systems (feed, notifications, digest emails, A2A) to connect users with content on the Quora platform.
Machine Learning Researcher BraveRemote $20k–$100k Building privacy-preserving and decentralized machine learning systems for the Brave Web Browser, focusing on adtech and malware detection.
PROFESSEUR DES UNIVERSITES - Mathématiques appliquées et applications des mathématiques Ecole-Economie-ToulouseFrance Develop research in machine learning for online decision systems applied to economics, focusing on performance and privacy.
Principal Data Scientist, 5+ years, 2-3 years relevant (Equity-only, Part-Time, Founding role) ReviewDaleRemote ( Lead groundbreaking innovations in the retail industry to redefine how customers discover, interact with, and purchase products.
Senior Applied Scientist – Microsoft 365 Copilot Microsoft Design and run experiments to develop scalable retrieval pipelines and models for enterprise-scale search systems supporting Microsoft 365 Copilot Search, Chat, and Agent experiences.
Research Data Scientist AdeptIDRemote $85k–$120k Develop and improve machine learning models describing how individuals move through the economy to identify hidden talent and match them to jobs and training.
Senior Applied Scientist - Moloco Ads MOLOCORemote Research Scientist optimizing ad auction systems, prediction models, and infrastructure reliability for Moloco's mobile advertising platform.
Manager, Engineering - Data Science LTKRemote Lead a team of data scientists building LTK's native AI platform and conversational AI capabilities for recommendations, retrieval, ranking, and semantic understanding.

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