Renjun Xu, PhD
About Renjun Xu, PhD
Renjun is a Senior Director of Data and AI specialized in deep learning, NLP, and computer vision, with extensive hands-on coding and project management experience on massive data scale, performed machine learning model development, risk scoring, and fraud detection for multiple national and global projects. Track record of providing valuable insight for the company to take further business actions through dimension reductions and other manner. Has an ability to quickly grasp the keys of new trending technologies == Skillset == • AI/NLP/Computer Vision: Deep Neural Network (RNN, GRU, LSTM, CNN, ...), Deep Reinforcement Learning, GAN, Gradient Boosting Decision Tree, Tensorflow, Tensorboard, Word2Vec, gensim, Keras, PyTorch, Scikit-Learn, Spark/MLlib, k-NN, Random Forest, logistic regression, graph models • Expertise in writing production quality Python code, very familiar in C/C++, Java, R, Matlab, Mathematica, Maple, VBA, Fortran, Linux shell script, bash, sed, grep, awk in almost daily touches • Cluster computing: Hadoop, MapReduce, Hive, Apache Lucene, Solr, Spark, Docker, MPich • Relational Algebra and Deductive DB: SQL, first-order logic, SWI-Prolog, LDAP • 13 years of experience in big data analytics and machine learning modeling • 12 years of hands-on experience on Linux/Unix, HPC, GPU computing, and Hadoop systems Specialities: Deep Learning, NLP, Risk and Fraud Detection, Predictive Modeling, Mathematical Modeling, Prototyping, Development of Analytical Models and Algorithms, Data Science, Decision Science, Innovations, Quantitative Analysis, Business Intelligence