Luyang Wang

Sr. Manager Data Science, Burger King Corporation

Luyang Wang is a Sr. Manager on the Burger King data science team at Restaurant Brands International, where he works on developing large scale recommendation systems and machine learning services. Previously, Luyang Wang was working at the AI lab at Philips and Office Depot.

Past sessions

Offers are important sales drivers in the fast-food industry. Being able to segment customers based on their offer preferences and assigning the best offer sets to each segment is critical for a customer-centric recommendation system to enhance user shopping experience.

Directly applying recommendation models to this use case would cause the “black box” problem where marketers can have difficulty understanding the model’s decision logic. It’s also challenging for marketers to apply different offer strategies to different customers. On the other hand, traditional customer segmentation approaches won't generate offer recommendations and therefore they still rely on marketers to manually assign offers to each user segment.

At Burger King, we have developed our own offer recommendation system that leverages pre-trained BERT and Inception models on Apache Spark to extract feature representations directly from offer descriptions and images, followed by Spark MLlib to form the user segmentations. Such a system can discover customer segmentations based on their offer preference and can also directly generate offer recommendations from these resulting segments.

Furthermore, it is robust enough to handle the constantly changing offer pool and newly joined customers without the need to keep retraining the model from time to time. In this session, we would discuss our offer recommendation system in detail.

In this session watch:
Kai Huang, Software Engineer, Intel Corporation
Luyang Wang, Sr. Manager Data Science, Burger King Corporation


For fast food recommendation use cases, user behavior sequences and context features (such as time, weather, and location) are both important factors to be taken into consideration. At Burger King, we have developed a new state-of-the-art recommendation model called Transformer Cross Transformer (TxT). It applies Transformer encoders to capture both user behavior sequences and complicated context features and combines both transformers through the latent cross for joint context-aware fast food recommendations. Online A/B testings show not only the superiority of TxT comparing to existing methods results but also TxT can be successfully applied to other fast food recommendation use cases outside of Burger King.

In addition, we have built an end-to-end recommendation system leveraging Ray (, Apache Spark and Apache MXNet, which integrates data processing (with Spark) and distributed training (with MXNet and Ray) into a unified data analytics and AI pipeline, running on the same cluster where our big data is stored and processed. Such a unified system has been proven to be efficient, scalable, and easy to maintain in the production environment.

In this session, we would elaborate on our model topology and the architecture of our end-to-end recommendation system in detail. We are also going to share our practical experience in successfully building such a recommendation system on big data platforms.

Speakers: Kai Huang and Luyang Wang