Senior Machine Learning Engineer, Lemon8 Recommendation (Multiple Positions)

About TikTok TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo. Why Join Us Inspiring creativity is at the core of TikTok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy - a mission we work towards every day. We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users. When we create and grow together, the possibilities are limitless. Join us. About the Team Our team plays a crucial role in ensuring the company’s success. We seek people who are willing to learn and put in the effort to solve problems. Our challenges are not your regular day-to-day problems - you’ll be part of a team that’s developing new solutions to new challenges. It’s working fast, at scale, and we’re making a difference. We are looking for talents to join us on this exciting journey! Responsibilities Design, develop, and deploy machine learning models, including recommendation, ranking, and personalization systems to deliver relevant and engaging content to application users. Leverage large-scale user behavior data, representation learning, and experimentation frameworks to continuously optimize recommendations, improve user retention, and enhance user experience across the platform. Formulate real-world user data modeling in statistical learning problems. Research and design ML models to optimize systems, features, algorithms, and product strategies. Design and execute user procedure experiments, tests, and significance analyses by applying statistical test theories to optimize user experience. Collaborate with product and operations teams to experiment with and refine ML models across various products, gaining insights into how ML can optimize different areas. Mentor junior Machine Learning Engineers and interns. Qualifications Must have a Bachelor’s degree or foreign equivalent degree in Computer Science, Engineering (any), Information Technology, Data Science, Analytics (any), Mathematics, or a related field, and 4 years of related work experience. In lieu of a Bachelor’s degree, employer will accept an additional two years of related work experience. Of the required experience, must have 4 years of experience in each of the following: Building end-to-end model training pipelines using Python or Hadoop MapReduce, and training large-scale models using deep learning and machine learning (ML); Designing, developing, and implementing advanced machine learning and deep learning models, including supervised and unsupervised learning techniques; Researching, testing and productionizing state-of-the-art deep learning models and methods; Using SQL and Spark to perform large-scale dataset analysis, including user behavior, probability distribution, and time series analyses; and Utilizing Big Data Framework Hadoop or Flink. Travel Requirement: International travel required up to 25%. Type: Full time, 40 hours/week Location: San Jose, CA Salary Range: $275850 - $387600 per year To Apply, click the apply button below. Contact lpresumes@tiktok.com if you have difficulty submitting resume through the website. TikTok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At TikTok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too. TikTok is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at https://tinyurl.com/RA-request #IND-DNI