Senior Data Scientist and Machine Learning Engineer2019 - 2022Freelance
Technologies: Spark, SQL, Google Cloud Platform (GCP), Python 3, Machine Learning, Scala, Data Science, Machine Learning Operations (MLOps)
- Contributed to the recommendation and other machine learning systems in an end-to-end manner. Designed and created prototypes for early de-risking with product managers, built large-scale production systems, and designed A/B tests for evaluation.
- Coached team members, contributed to teamwork practices, and provided hands-on workshops on recommendations and machine learning.
- Advised the product managers and engineers on the technology strategy of recommendation systems.
Senior Data Scientist and Machine Learning Engineer2015 - 2019SoundCloud
Technologies: Spark, Machine Learning, Python 3, Scala, SQL, C, C++, TensorFlow, Data Science, Machine Learning Operations (MLOps)
- Contributed to the core recommendations algorithms, including the matrix factorization, word2vec, factorization machines, locally sensitive hashing, learning to rank, and counterfactual evaluation.
- Performed data engineering work on ETLs for recommendations using AirFlow, SQL, Spark, Cassandra, APIs for online serving, and A/B testing infrastructure.
- Conducted data analysis tasks such as user behavior analysis and experiment design and evaluation.