Twitter, Inc. has the following position open in San Francisco, CA: ML Engineer II - Build relev & mach learng models & sw sys to pwr core of the Twitter prod. Part in the engg life-cycle at Twitter, include dsgn distrib sys, wrtng production code, condt code reviews & work alongside infr & reliab teams. Apply data sci, mach learng & graph analysis tech to a varty of model & relev probs involve users, their relatnshps, their tweets & their interest. Resp for core featurs of twitter.com, which includes Timelines, Tweets, Search, Trends, Recomdns, Notifs, Tweet details/permalink, & more. Dvlp solns to algorithmic & deep sw infr issues. Solve large scale relev probs in the sw & use the solns to build brand new sys to enable future qual imprvmnt. Telecom permitted. Reqs: MS or foreign equiv in Maths, Stats, or rel quan discip plus 3yrs of exp in the job offered or 3yrs of exp in the field of data sci or stats or BS or foreign equiv, in Maths, Stats or rel quan discip plus 5yrs of exp in the job offered or 5yrs of progress resp exp in the field of data sci or stats. Spec Reqs: Hadoop, Map-Reduce; Data Structures; Algorithms; Python; Hive or SQL; Linux-based system; Scala; Prediction Models; and Machine Learning Systems. Any suitable combo of edu, training & exp is acceptable. Hrs: 8am-5pm, Mon-Fri. Offered wage: $170,000. Interested send resumes to Recruitment and Employment Office, TWITTER, INC., Attn: Job Ref #: TWI53845, P.O. Box 56625, Atlanta, GA 30343.