Machine Learning - DoorDash Engineering Blog

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Machine Learning Augmenting Fuzzy Matching with Human Review to Maximize Precision and Recall

When we encountered a business problem that required an error rate of zero, we turned to a classification model with human review

Robert B. Kaspar

Mitchell Koch

9 Minute Read

Machine Learning

Homepage Recommendation with Exploitation and Exploration

Learn how our model balances exploitation and exploration during ranking to optimize the consumer experience while simultaneously improving fairness for merchants

Yu Zhang 17 Minute Read

Data Machine Learning

Five Common Data Quality Gotchas in Machine Learning and How to Detect Them Quickly

Data preparation, represents The vast majority of work in developing machine learning models, learn how to make things easier

Kornel Csernai

Devjit Chakravarti 10 Minute Read

Machine Learning

Evolving DoorDash’s Substitution Recommendations Algorithm

When expanding from made-to-order food delivery to new product verticals like groceries, convenience, and retail, new challenges arise, including how to ensure inventory will be available to fulfill orders. As a business, we always want customers to receive all the items they ordered. For restaurant orders, this is easy to do because merchants offer relatively ...

Dawn Lu 8 Minute Read

Machine Learning

4 Essential Steps for Building a Simulator

For complex systems simulating the impact of algorithmic changes is often faster and less costly than experimenting on features in production

Devjit Chakravarti 13 Minute Read

Machine Learning

Leveraging Causal Inference to Generate Accurate Forecasts

Learn how DoorDash captures hard to measure macroeconomic effects like IRS refunds and the effect of Daylight savings in these case studies

Chad Akkoyun

Qiyun Pan 11 Minute Read

Data Machine Learning

Meet Dash-AB — The Statistics Engine of Experimentation at DoorDash

Learn how DoorDash was able to test uniformly according to established best practices and reuse complex statistical methods with Dash AB

Caixia Huang

Yixin Tang 12 Minute Read

Machine Learning

Building the Model Behind DoorDash’s Expansive Merchant Selection

Having a quality selection did not happen by accident. Learn about the ML models that power the diverse, high quality selection on our platform

Lu Wang

Ying Yang

Chen Dong 10 Minute Read

Machine Learning

Using Gamma Distribution to Improve Long-Tail Event Predictions

Which loss function is best for long tail event prediction? learn how we used gamma distributions to boost eta prediction accuracy

Pratik Parekh

Zhe Jia 8 Minute Read

Machine Learning

Using a Multi-Armed Bandit with Thompson Sampling to Identify Responsive Dashers

Epsilon-Greedy, The Upper Confidence Bound, Thompson Sampling: which is the best Multi-armed bandit algorithm for promotion optimization?

Arjun Sharma 10 Minute Read

Machine Learning

Ship to Production, Darkly: Moving Fast, Staying Safe with ML Deployments

Learn how DoorDash balanced ML models' release speed and reliability by shipping darkly in order to manage fraud model deployments

Bob Nugman 8 Minute Read

Machine Learning

Balancing Network Effects, Learning Effects, and Power in Experiments

Experimenting can mean balancing learning and network effects, while ensuring adequate power. Learn how we manage this trilemna in this post

Wei Feng

Jared Bauman 9 Minute Read

Data Machine Learning

Introducing Fabricator: A Declarative Feature Engineering Framework

Learn how our Fabricator infrastructure integrations for ML features were automated and continuously deployed to generate 500 unique features and 100+ billion daily feature values

Kunal Shah 13 Minute Read