technical anatomy of a caller id android app

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Technical Anatomy of a

Caller ID application

Kristine Delossantos

Oct 3rd’2013

#GHC13

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women in tech poster design copy.pdf 1 3/11/13 1:17 PM

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Outline

Overview of WhitePages Current Caller ID

Technical Architecture

Key Problems and Solutions

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Sweet Call Alert

Know who’s calling and

what is happening with

them real-time

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One List, One Touch

Consolidated call/text log

One tap easy access to

top contacts

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Make It Visual

Sharable insights into communication style

– who when and how.

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How It Works

Meet Spongebob…

He just got a new phone,Installed Current,And wired it to Facebook!

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Spongebob’s Friends Are Excited!

They want to celebrate and get Krabby Patties together,So they text him about it

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Technical Architecture

Active MQ

Contact GraphStore

WhitePages

Mobile

Service Front

Ends

Entity

Resolution

System

Data

Collection

Services

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Keeping Data Fresh

Network variance

Data connections

Usage PlansPush/Pull protocols

Our solution: • We periodically update the data on a schedule in

the background, in batch. • Active MQ & worker machines

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Data Transfer

Our solution: Thrift over Http and we only deliver objects since the last successful request.

ThriftJSON

Serialized Contact List Size Comparison

GZipThrift

HTTP

Updates

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Storage Solution

Engineering costs

Operational costs

Postgres

Our solution: We settled on Postgres and treat it as a NoSQL key-value store. This saved engineering time as well as costs.

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Entity Resolution System

Machine learning

Tunable

Performance

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Developing Mobile Applications

Carrier variance

Test matrix

Device variance

Platform solutions

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