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Amazon Leadership Principles - Coggle Diagram

- - - - No matter what project I worked on, my goal was to make sure that my customers and the end users satisfy with the results.
        
        At one time one of my good friend want me to build a e-commerce website for her father with WordPress. I started to help, but eventually spent more than 80 hours on it, cause I tried to make sure all the details in the site looks right and easy for her father to learn.
        One example is the picture uploading part, I spent more than 5 hours to wrote a image processing app with a linux tool called imagemagic or convert.
        
        That was the first time I realized that using CLI to editing photo can be so powerful! And I was amazed by the convert function.
        
        Issue: all the product images are in HD and no-white space mode. But on WooCommerce, there is no plug-in or practical way to solve both the thumbnail and product page image image ratio correctly. It's like either the thumbnail only show the middle part of the ketchup bottle, or the size of the product image in the product page is expand over the bottle of the page.
        
        I spent a few day to do research but did work after I tied at least dozens of method. So I eventually decide to get my hands dirty, and did some research online. Cause I feel like Command line might be powerful enough to handle image processing, even though it doesn't show any images.
        
        After I spend a feel hours experimenting. Turns out that convert can help me to resizing image easily. And I also found that even after resizing it still goes back when I upload it.
        
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  - - - And finally, if someone from AWS S3 comes to me and says they found a problem in my Android product, I’m going to be thrilled that they care enough. I’ll invite them to my office, see what they found, and discuss how we might fix it. Because we’re all owners and we all care, no one should ever say “That’s not my job”.
    - - I'm the owner of the case I was given, and I will responsible for it just like my owner startup.
  - - - Be curious.
  - - - How to Decide between technologies?
        
        “The other engineer and I discussed it for a couple hours, figured out what we disagreed on, and I suggested that neither answer was necessarily better. She agreed. I said that unless she had any new info, I’d rather we just pick mine, and we could always come back to the decision later if we learned something new.”
        
        We value this type of risk taking, because we need to move fast in areas where we can’t possibly know the right answer. Option A or Option B? Pick and move on.
  - - - Project 1
      - Project 2
      - Project 4
      - Project 3
      - Trading API
      - Caliper-GUI
        
        Issue: (1) The configuration issue for the Caliper installation
        
        It's interesting that the caliper-cli has very restricted requirements to run ... System, permissions, and ...
        
        I wrote a documentation for everyone: Find the doc
        
        I sent them to the whole Caliper community in China and U.S. from WeChat and RocketChat. Because I hope everyone can at least get through some issues.
        
        1) System: Ubuntu 18.04 (I tested on MacOS, CentOS which doesn't work)
        2) I tested on my Vultr server with 1 CPU, but it eventually stoped me from running Lerna because of permission issue
        
        On the fly: I learned how to partition and adding space to the VB when I do the testing.
        3) The Virtual Box version finally worked, but I will need to configure it to be able to integrate with my Caliper-GUI front-end in test environment.
        4) Read all the source code of Caliper core and integrated all the packages written by Node.js to my Backend Server and API.
        5) Not required feature (Socket.io), I just add it, cause I fee that can make things so much more intuitive and let user easier. That took me hours to learn and tuning. But I still believe all of the works worth it.
    - - E.g.
        
        How did you reduce the memory footprint? “It’s funny, we had to restart our system every few months because of a memory leak. I’d just joined the team, and the mystery annoyed me. So I spent a few hours reading very carefully through our memory management code, and realized that we incorrectly double-parsing in one of our helper functions. Not only did it save on memory, but CPU as well. It’d been there for years.”