Full explanation can be found in this blog post. The source code is compatible with TensorFlow 1.1 and Keras 2.0.4
aimlnerd/Credit-Card-Fraud-Detection-using-Autoencoders-in-Keras
iPython notebook and pre-trained model that shows how to build deep Autoencoder in Keras for Anomaly Detection in credit card transactions data
Jupyter NotebookMIT