At Dubsmash we send over 500 million push notifications every month. Building a scalable system that allows platform-agnostic push notifications to a >100m users-base is challenging. We leverage AWS Lambda in order flexible cover our three different use-cases in an elastic and cost-efficient manner.

1. Using AWS Lambda as a push
notification cannon
AWS Usergroup Dublin MeetUp #15
Daniel Taschik – 09/06/2016

3. We hit a nerve.
100M
Users
192
Countries
1.5B
Videos

4. Dubsmash 2.0
Connect Create Communicate

5. Sending hundreds of million of
pushes using AWS Lambda

6. Use Cases for Pushes at Dubsmash

7. Challenges
+
Global User Base Real-time delivery Tracking

8. 3 Steps
1. Device registration
2. Sending push notifications
3. Result processing

9. 1.) Device Registration
register with
push token
ARN & device data
worker
SNS
SQS device store

10. 2.) Sending Push Notification
Push
Trigger
device data store
load targeted devices
slice device batch in batches
of 35k
notification
scheduler
SNSLambda
notification
dispatcher
wrap notifications for max.
SNS payload
~ 300 recipients
push!
SNS

11. Code example

12. 3.) Result Processing
SNS
Lambda
SQS
Lambda results
worker device store
delivery results / APNS
Feedback Service
deactivate/ update
devices
Push!

13. Some metrics
>520M
pushes sent last months
>3.7M
Lambda invocations
>12.3M
seconds of Lambda
compute time
<10min*
to send 15M pushes at once
14Gb/8Core
hardware for scheduling
2Gb/2Core
hardware for dispatcher

14. Let’s say it with video!
Thank you
daniel@dubsmash.com | @dtaschik