flight2015-coffey eoin-building powertrack › content › dam › ... · senior ios developer |...

Eoin CoffeyRealtime Team Lead, Twitter | @ecoffey

Building Power Track: Philosophy & Design

500 M Tweets per day

Finding the needle in the haystack

FIREHOSE

FILTERING

STREAMING

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PowerTrack

Product Highlights

How We Built PowerTrack

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5,787 Tweets per second

.000172 Seconds per Tweet

Predicate Indexing

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What do we index?

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“twitter fabric” add“twitter fabric”

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“twitter fabric” add

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Side A

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Bend, Don’t Break

Quarantine

CUSTOMER

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Common Themes In Each Layer

LIMIT TIME OF CUSTOMER IMPACT

DEFENSE IN DEPTH

OPERATIONAL SIMPLICITY

RELIABLE TECHNOLOGIES

Not just about code… It’s about people

The customer motivates everything we do

Collective code ownership

Face to face communication over processes and tools

Introduce or keep code only when it solves a business problem

Optimizes for the group over the individual

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Thank You@ecoffey

APPENDIX OF TEMPLATE SLIDES

SUBTITLE

Graph/Chart ExamplesBASED ON MASTER SLIDES

of people are… This is an example of an editable pie chart with a large statement80%

Line Chart Editable Example

TIME VIEWED

20

15

10

5

0

-5

Twitter

Other

AT

TR

AC

TIO

NA

VE

RS

ION

Source | Nielsen, Video Engagement in Choice Environments, Dec 2014

Bar Chart Editable Example

Source | “Where Can Digital Video Ads Have Consumers' Attention? Smartphones” eMarketer, Oct 2014

34%

37%

23%

51%

47%

41%

52%

56%

64%

SMARTPHONE

TABLET

PC

High Attention

Moderate Attention

Low Attention

Code ExamplesBASED ON THE CODE MASTER SLIDE

DGTAuthenticateButton *digitsButton = [DGTAuthenticateButton buttonWithAuthenticationCompletion:

^(DGTSession *session) { // Inspect and/or store session object}];

[self.view addSubview:digitsButton];

DGTAuthenticateButton *digitsButton = [DGTAuthenticateButton buttonWithAuthenticationCompletion:^(DGTSession *session) {}];

Web Screenshot ExamplesBASED ON MASTER SLIDES

fabric.io

Feature Namefabric.io

Tweet ExamplesCOPY AND PASTE THESE TWEETS TO CREATE YOUR OWN

The Barista Bar @baristabar

Visit our site to see the full Barista Bar menu and specials! #LoveCoffee

41 68

The Barista Bar @baristabar

Visit our site to see the full Barista Bar menu and specials! #LoveCoffee

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Special ExamplesBASED ON BLANK MASTER SLIDES

This is a blank slide for use in a variety of scenarios

“Nowadays, Crashlytics is a normal part of our development and production

lifecycle, and we're very happy with it.”

–Justin Morgan Senior iOS Developer | Starbucks