A9.com, the search technology subsidiary of Amazon.com, is looking for highly motivated engineers interested in improving the quality of Amazon's product search. As part of A9's Relevance team, you'll participate in all parts of the R&D process, from experimenting with new ideas and exploring new techniques to implementing the code used by millions of Amazon.com customers every day. You'll work on a variety of problems related to the search experience, ranging from relevance ranking to spelling correction to query classification. You'll invent algorithms for improving search quality and develop methodologies for measuring search effectiveness. You'll work in A9's small-company environment, but have access to the resources of Amazon.com, one of the world's leading Internet companies. You must be an innovative thinker, a strong communicator, and a rock-solid engineer with a record of working on industrial-strength software systems.

• Advanced degree in Computer Science or related field, or equivalent industry experience
• C++ development in a Unix environment
• Algorithm design and analysis
• Domain expertise in ONE OR MORE of the following fields:


• Information Retrieval
• Data Mining
• Machine Learning
• Computational Linguistics
• Artificial Intelligence

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