Job Description

Company Description Twitter is what’s happening and what people are talking about right now. For us, life's not about a job, it's about purpose. We believe real change starts with conversation. Here, your voice matters. Come as you are and together we'll do what's right (not what's easy) to serve the public conversation.

Job Description WHO WE ARE: In Twitter, we serve billions of ad impressions and generate millions of dollars in revenue per day. For every Ad shown on Twitter, our prediction system (the largest ML service at Twitter) evaluates thousands of ad candidates behind the scene to find the best one. When executed successfully, we create aha! moments for our users & advertisers and add huge value to the Twitter business & revenue.

Our mission is to build state of art machine learning infrastructure and make Twitter ads as relevant in the moment as organic content on Twitter.

WHO YOU ARE: You’re a back-end software engineer who wants to work on exciting algorithmic and deep infrastructure issues in ML environments.

Qualifications RESPONSIBILITIES:

• Work with large unstructured and structured data sets (multi-terabyte+, 100MM+ daily transaction volumes)
• Design and evaluate novel approaches for handling high-volume real-time data streams in a machine learning environment
• Code using primarily Java and Scala; Map-Reduce frameworks such as Pig and Scalding; and scripting languages such as Python
• Learn new machine learning, data mining, and/or natural language processing techniques for a variety of modeling and relevance problems involving users, their tweets, their interests, Twitter ads, relationship among entities
• Conduct online A/B testing, interpret and understand algorithm performance

QUALIFICATIONS

• 3+ years relevant experience and MS or PhD in computer science
• Fluent in one or more object oriented languages like Java, Scala, C#, C++
• Experience with Hadoop, Pig or other MapReduce-based architectures
• Knowledgeable of core CS concepts such as: common data structures and algorithms
• Comfortable conducting design and code reviews
• Experienced in operating Linux-based systems
• Passionate about working with large unstructured and structured data sets

Additional Information WE ARE COMMITTED TO AN INCLUSIVE AND DIVERSE TWITTER. TWITTER IS AN EQUAL OPPORTUNITY EMPLOYER. WE DO NOT DISCRIMINATE BASED ON RACE, ETHNICITY, COLOR, ANCESTRY, NATIONAL ORIGIN, RELIGION, SEX, SEXUAL ORIENTATION, GENDER IDENTITY, AGE, DISABILITY, VETERAN STATUS, GENETIC INFORMATION, MARITAL STATUS OR ANY OTHER LEGALLY PROTECTED STATUS.

SAN FRANCISCO APPLICANTS: PURSUANT TO THE SAN FRANCISCO FAIR CHANCE ORDINANCE, WE WILL CONSIDER FOR EMPLOYMENT QUALIFIED APPLICANTS WITH ARREST AND CONVICTION RECORDS.