Effective and efficient mobile engineering

Transcript

1. Effective and efficient
   mobile engineering
   pratul kalia
   @prxtl
   uncommon.is
   

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2. Over the last 4 years…
   

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3. !
   1. Contrasting with the Web
   2. Product Design
   3. The Platforms
   4. Culture
   

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4. Contrasting
   with the Web
   

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5. Significant
   reduction in speed.
   ➔ Tightly coupled UI
   ➔ Changes to the backend can
   cause significant impact
   

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6. No dynamic
   updates!
   ➔ Closed “store” model
   ➔ React Native maintenance overhead
   

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7. Wait… how many
   versions?
   ➔ Multiple versions will be “live”
   ◆ Versioned APIs
   ◆ Remote kill-switch
   

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8. Product design
   

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9. Consistency is an
   expectation.
   ➔ Even from inexperienced users!
   ➔ Push from Google/Apple
   ◆ Back button exit confirmation
   ◆ Slide to go back
   

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10. Low tolerance
    towards jank.
    ➔ Performance is important
    ➔ Perceived speed is important too
    

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11. Mobile devices have
    personal information.
    ➔ User privacy is critical
    ➔ Engineers are as responsible
    as the Product Designers
    

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12. The platforms
    

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13. Badly behaved
    apps have no place.
    ➔ Memory/CPU constraints
    ➔ Disk thrashing is real
    

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14. Constant learning
    is imperative.
    ➔ Play Services division
    ➔ RecyclerView prefetch
    ➔ Read SMS-OTP API
    

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15. Don’t fake
    optimise.
    ➔ Splash screen delays
    ➔ Protobuf and JSON
    

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16. Security theater
    is a concern.
    ➔ Certificate pinning
    ➔ Protecting API endpoints
    ➔ Client-side encryption
    

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17. Culture
    

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18. You cannot fix with technology
    what is broken by culture.
    me.
    

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19. git is not
    Dropbox.
    ➔ Rollbacks
    ➔ Bisecting
    ➔ Hooks
    

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20. What is your bus
    factor?
    ➔ Documentation
    ➔ … Documentation
    ➔ … … Documentation
    

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21. Are you measuring
    the metrics?
    ➔ Data driven design much?
    ➔ Performance impact
    

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22. Effort does not
    mean progress.
    ➔ bugfix : feature ratio?
    ➔ The Mythical Man Month

    Fred Brooks
    ➔ Peopleware — Productive Projects and Teams

    Tom DeMarco & Tim Lister
    

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23. eof
    

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