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 a 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.

Twitter's Consumer Product Teams are responsible for core features of Twitter.com, which include Timelines, Tweets, Search, Trends, Recommendations, Notifications, Tweet details/permalink, and more! Our code operates at massive scale and speed, serving billions of requests per day, connecting hundreds of millions of active Twitter users to real-time information about their lives and the world we live in.

Who We Are: The Home teams are part of the largest consumer organizations at Twitter. Our mission is to collect the world’s thoughts, conversations, and news and make it universally accessible for customers to see and discuss through state-of-art machine learning techniques. 

Our Home teams are hiring multiple ML Engineers across various levels (Senior, Staff, and beyond). These include teams for Home Modeling, Home ML System, and Home Product.

We build relevance and machine learning models and systems to power the core of the Twitter product - Home Timelines. Every time users see new tweets we evaluate candidates from the nearly half a billion daily tweets to select, organize and deliver the best timeline. The recent products and technologies built by our team have shown consistent results in driving retention and are some of the largest contributors to engagements on the platform.

What You'll Do: Although you will work on cutting-edge problems, this position is not a research position. You will participate in the engineering life-cycle at Twitter, including designing distributed systems, writing production code, conducting code reviews and working alongside our infrastructure and reliability teams. You’ll apply data science, machine learning and/or graph analysis techniques to a variety of modeling and relevance problems involving users, their relationships, their tweets and their interests.

Who You Are: You’re a Relevance engineer, applied data scientist, or machine-learning engineer who wants to work on exciting algorithmic and deep infrastructure issues. You’re experienced in solving large-scale relevance problems and comfortable doing incremental quality work while building brand new systems to enable future quality improvements.

• Knowledgeable in one or more of the following: machine learning, information retrieval, recommendation systems, social network analysis
• Designed and evaluated approaches for handling high-volume real-time data streams.
• A strong technical advocate with a background in Java, C++, or Scala, and Python.
• Comfortable conducting design and code reviews.
• Experienced in operating Linux-based systems.
• Knowledgeable of core CS concepts such as common data structures and algorithms, profiling/optimization.
• Passionate about working with large unstructured and structured data sets ( for example multi-terabyte+, 100MM+ daily transaction volumes).
• Experienced in collaborating across multiple teams including analytics, product management, and operations.

Requirements:

• Masters degree or Ph.D. in Computer Science or Machine Learning related degree; or equivalent work experience in the field
• 3+ years applying machine learning to real-world problems in an industrial setting.

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, 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

Notice (Colorado Equal Pay for Equal Work Act)

The expected salary range for this role to be performed in Colorado is USD$191,000.00 - USD$267,000.00. Starting pay for the successful applicant will depend on a variety of job-related factors, which may include education, training, experience, location, business needs, or market demands. This range may be modified in the future.

This job is also eligible for participation in Twitter’s Performance Bonus Plan and Equity Incentive Plan subject to the terms of the applicable plans and policies.

Twitter offers a wide range of benefits to U.S.-based employees, including medical, dental, and vision insurance, 401(k) program with employer match, generous time off for vacation, sick time, and parental leave. Twitter's benefits prioritize employee wellness and progressive support to our diverse workforce.