Senior Software Engineer, Real Time PlatformThe AppNexus Platform was built upon the foundation that we could help our clients buy and sell media in the most effective and efficient way possible. AppNexus has since then become a pioneer in developing real-time technology into various aspects of our platform stack to make our advertising solution one of the fastest, most reliable, and massively scaled systems in the industry. In the past 3 years, we've grown from processing 300k QPS to over 5 million QPS for an approximate total of 100 billion requests per day. These events generate more than 150 TB of new data every day. Engineers work on the real-time components to optimize our software for performance, space, and algorithmic efficiency. This is an energizing community of engineers that is committed to building dependable products - the software and systems being built drive our real-time bidding business along with a multitude of other core initiatives for AppNexus. We work under strict real-time constraints, responding to and executing real-time, dynamic auctions in less than 100 milliseconds.Consider some of the problems you will try to solve:Large-scale distributed systems: Our real-time budget problem requires pushing updates on millions of objects to thousands of machines using our custom caching solution all while observing strict SLA requirements.Interesting algorithmic problems: Use the latest research and techniques to make full use of the underlying hardware and instruction sets, utilizing things like lock-free data structures and intelligent thread design to optimize revenue, memory footprint, and overall algorithmic efficiencyProgramming, probability and statistics: We predict and track the performance of thousands of advertising campaigns that bid on a cost per impression, cost per click, and cost peracquisition basis. Now try to do this at 5 million times in 100ms or less.About the job:Design and implement new features and enhancements to our Platform that require hard real-time constraints and elegant, yet powerful software solutionsWork closely with other engineers and our Product teams, to not only make these systems go faster and handle more and more data, but also to build revolutionary new features for our clients.Prioritize bug fixes to ensure critical up-timeWork collaboratively with other engineering teams to ensure real-time technology integrates seamlessly with other pieces of the platformAbout your skills and experience:BA/BS degree and 6+ years of experience OR MS degree and 3+ years of experience in software engineering (Degree in Computer Science or related field preferred)Experience using either C, C++, or Java, with excellent and creative problem-solving abilitiesExperience building high performance, multi-threaded, distributed systems and applications, preferably in a Linux environmentExperience practicing advanced optimization techniquesExperience with real-time data processing engines, ultra-low-level, and low latency systems is preferredExcellent Computer Science fundamentals with regards to data structures, algorithms, time complexity, etc.Hiring Managers:MultipleRecruiters:Multiple
AppNexus provides trading solutions and powers marketplaces for Internet advertising.