Web Application Stack
Our flagship iPhone/iPad app is written in 100% heavily-functional Swift. We have adopted MVVM and dependency injection to distribute responsibilities and make our code easily tested with the Quick and Nimble frameworks. ReSwift is used for storing and communicating changes to global state.
We use both UIKit and SwiftUI where appropriate to create a great user experience. The app leverages Apple's Combine framework for data binding and asynchronous communication throughout the app. For networking we use a combination of REST and GraphQL APIs.
Our dependencies are managed by Swift Package Manager, our build process is simplified with fastlane, and everything is brought together using CircleCI.
The Doximity app is written in 100% Kotlin. We follow the Clean Architecture approach, adhering to SOLID principles. We make ample use of Jetpack libraries throughout the app. While we traditionally used databinding on the view layer, we are currently migrating our entire UI to Jetpack Compose. On the networking layer, we use Kotlin Coroutines to interface with Doximity’s GraphQL API. We strive to provide ample unit test coverage using JUnit and Mockk. In addition, we use Firebase Test Lab to run our Espresso and Compose instrumentation tests.
Doximity relies on Python's powerful data libraries such as pandas, scikit-learn, gensim, and nltk. We also leverage Apache Spark (PySpark), Jupyter, GraphX, and Spark ML. Our centralized warehouse is powered by Snowflake, and our models and transforms run within Docker containers scheduled through Airflow.
MySQL, more specifically Aurora, runs the show. We rely on Redis and Memcached to provide support for caches and background job processing. Elasticsearch powers things like full text search, search suggestions, some functions of our network graph, and our recommendation engine. It even sometimes acts as cache store. We utilize Neo4j to perform complex network graphing operations.
Grafana & Prometheus
The bulk of our applications and services are being run on AWS EKS and are managed via Helm, ArgoCD, and internal tooling. Ubuntu is our operating system of choice for all longer running standalone servers and track LTS versions. We leverage Ansible, Chef, Terraform, and AWS Image Builder for automation and provisioning AWS servers and other infrastructure. We are currently in the process of introducing Kubernetes to mirror local development built on Docker. We use a variety of tools to monitor our systems such as Prometheus, Graphite, Grafana, and many others. Lita Bot deploys, migrates, and restarts our applications. We leverage HackerOne for our security bounty program.
AWS Shield Advanced
Cloud Posture Management
Zscaler (ZIA + ZPA)
Clinician and patient privacy and security is a top priority. Our library of infrastructure-as-code and application support modules enables us to launch new application services efficiently. These modules help with best practices and secure defaults. Our active HackerOne bug bounty program lets us continuously battle-harden our security. Utilizing tools such as Rubocop, Brakeman and SonarQube prevents issues before they make it to production. Web application firewalls, DDoS protection services and custom tooling provide robust preventative protection. We create observability and monitor application and infrastructure security events.
Karma & Jest
XCUI, Quick & Nimble
Espresso & jUnit
We leverage CircleCI to execute our comprehensive suite of automated tests, providing feedback on every single commit. Each build is parallelized across multiple containers that auto-scale to provide the development team with quality feedback, fast. This, along with other automated tasks, adds up to a pipeline designed to simplify and speed up our developers’ daily workflows.
Our platform leverages Ansible and Terraform to create, update, and maintain a Kubernetes deployment (using Amazon EKS). This allows us to provide a container-based deployment model for infrastructure and product teams. We use Go(lang) to build tools that simplify the setup of development environments, application deployments, and development workflow tools.
Adobe Creative Suite
We leverage Adobe Creative Suite for a myriad of tasks. Figma is where ideas and collaboration start. Our internal design system keeps us consistent. InVision hosts our product style guides. Dropbox is our go-to for asset sharing.