I’ll admit it: I’ve gotten a little used to working at smaller companies, where there’s no monitoring of company computers, and it’s the Wild West as far as what you can install on them.
That’s no longer the case for me. I now work at Auth0, a company with a headcount that’s quickly approaching 800, with unicorn status and Series F funding, and it’s in the security industry. Naturally, there’s a full-fledged security team that monitors company-issued computers.
In my excitement to take the new version of macOS — Big Sur — out for a spin, I’d forgotten that the Security team hasn’t yet approved it for use. They very quickly (and I should add, nicely) contacted me and let me know that I needed to reinstall macOS Catalina as soon as possible.
There are other reasons why you might need to go back to Catalina after installing Big Sur:
It’s still very new, and very new versions of operating systems always have some set of issues, whose effects can run the gamut from mildly annoying to catastrophic. If you can’t afford to lose time dealing with these issues, you should wait for the updates.
For the benefit of any who need to downgrade, here’s a step-by-step guide to reinstalling Catalina after you’ve installed Big Sur. You’ll need a USB key and the better part of an afternoon.
Step 1: The preliminaries
1a: Start downloading the Catalina installer from the App store
The first thing you’ll need is the macOS Catalina installer.
It’ll take up around 9 gigabytes of space on your hard drive, and the App Store will put in your Applications folder.
Once it’s completely downloaded from the App Store, the installer will start automatically. When this happens, close the installer. You’ll make use of it later.
The installer will take some time to download. Apple’s servers will be busier than usual, as many users are downloading Big Sur and other upgrades.
1b: Back up your files!
In the process of reinstalling Catalina, you’ll need to completely erase your Mac’s hard drive. If you have any files that you can’t live without, this is the time to back them up.
I didn’t have to worry about this, since:
All my work product is either code (which lives on GitHub) or content (which lives on GitHub or Google Docs), and
I’ve been at Auth0 less than a month, and between onboarding and offsites, there just hasn’t been that much of a chance for me to accumulate that many files on my hard drive!
1c: Get a nice fast USB key that stores at least 16 GB
The process will involve booting your Mac from a USB key containing the macOS Catalina installer, so you’ll need a key with enough space. An 8 GB USB key won’t be big enough. Because digital storage is all about powers of 2, the next size up will be 16 GB.
I strongly recommend that you use a USB 3 key, especially one with read speeds of 300 megabits/second or better, such as the Samsung Fit Plus. Doing so will greatly speed up the process. Don’t use a USB key that you got as conference swag — it may have the space, but more often than not, they tend to be slow, because they’re cheap.
If the USB key contains files that you want to keep, back them up. You’re going to erase the key in the next step.
Step 2: Make a bootable USB key containing the macOS Catalina installer
2a: Format the USB key
Plug the USB key into your Mac, then launch Disk Utility.
Select the USB key in Disk Utility’s left column, then click the Erase button:
You’ll be presented with this dialog box:
Enter MyVolume into the Name field, and for Format, select Mac OS Extended (Journaled). Click the Erase button. This will format the USB key with the volume name of MyVolume.
2b: Install the macOS Catalina installer onto the USB key
In Step 1a, you downloaded the macOS Catalina installer and closed it after it started automatically. In this step, you’ll transfer it to your freshly-formatted USB key.
Open a terminal window and paste the following command into it:
(The command above assumes that you gave the USB key the volume name MyVolume.)
Once you’ve provided sudo with your password, you’ll be asked if you want to erase the USB key. Entering Y in response will start the process of making the USB key a bootable drive and copying the macOS Catalina installer onto it:
The Erasing disk process will be relatively quick, but the Copying to disk process may take a while. This is where using a nice, fast USB 3 key will pay off.
Be patient and let it get to 100%, and wait for the Install media now available message to appear and the command line prompt to return.
2c: If your Mac is from 2018 or later, set it up to boot from external media
Check the year of your Mac’s manufacture by selecting About This Mac under the Apple menu:
If your Mac year is 2017 or earlier, you don’t need to follow the rest of this step. Proceed to Step 3.
If your Mac’s year is 2018 or later, you’ll need to change its security settings to allow it to boot from an external drive.
Here’s how you change the security settings:
Restart your Mac and hold down the ⌘ and R keys when you see the Apple logo. This puts the computer into recovery mode, which provides many setup options.
In the menu bar, select Utilities, and then select Startup Security Utility from the list that appears.
The Startup Security Utility window will appear:
Under the Secure Boot section, select Medium Security. This will allow you to install Catalina without having to connect to a network.
Under the External Boot section, select Allow booting from external media. This will allow you to install Catalina from a USB key or disk drive.
Step 3: Install macOS Catalina
Restart your Mac, and hold down the Option key while it restarts. Your Mac will present you with a choice of startup disks.
Choose the USB key. Your Mac will boot up and you’ll be presented with the macOS Catalina installer screen:
Go ahead and install Catalina.
Once Catalina is installed, you can proceed reinstalling your other software.
Once that’s complete:
If your Mac’s year is 2017 or earlier, you’re done installing Catalina. You can now go about reinstalling your software and restoring your backed up files.
If your Mac’s year is 2018 or later, you’ll need to restore its original security settings. The process is described in Step 4, below.
Step 4: If your Mac is from 2018 or later, restore the original security settings
If your Mac is from 2018 or later, follow these steps to restore the original security settings once Catalina has been installed:
Restart your Mac and hold down the ⌘ and R keys when you see the Apple logo. This puts the computer into recovery mode, which provides many setup options.
In the menu bar, select Utilities, and then select Startup Security Utility from the list that appears.
The Startup Security Utility window will appear:
Under the Secure Boot section, select Full Security.
Under the External Boot section, select Disallow booting from external media.
I did my research — because of course I did my research — and Auth0 turned out to be a very interesting opportunity for a number of reasons:
The position leans heavily on two skills that I have that aren’t seen in the same person that often: Programming and communications. I have lots of experience in these areas, and can bring my “A” game to the position.
Auth0 is in a business that is hot: Systems and information security, which is in demand as computing and networking becomes increasingly ubiquitous. The attractiveness of a hot business is obvious.
Auth0 is also in a business that is boring: To put it a little too simply, Auth0 is in the business of logins, which doesn’t sound terribly exciting. Here’s where things get counterintuitive — why would I want to get into a boring business? Partly because of an idea from entrepreneur and NYU marketing prof Scott Galloway, which is that boring businesses make money. It’s also an idea of mine, which is that “boring” businesses produce essential products and services. And in a world where identity and access control are crucial, and identity and access control service is essential. I’m all for this kind of boredom.
Auth0 is one of the standouts in a field with a few key players. There’s the companies that specialize in identity and authorization, such as Okta and Ping Identity, and then there are the giants such as Microsoft, IBM, and Oracle. If the 2019 Gartner Magic Quadrant for Access Management is to believed (and you should always read these graphs with some healthy skepticism), it’s at the top of the “Visionaries” quadrant:
Everyone in the desirable top right quadrant, “Leaders”, is either an old guard fingers-in-every-tech-pie company (IBM, Microsoft, Oracle), or has been in the identity/access business for over a decade (Okta was founded in 2009; Ping Identity goes back to 2002 — when there were iPods, and they had click-wheels). Auth0 was founded in 2013, and of all the up-and-comers in its space, it’s at the top. That means room to grow, opportunities to apply my talents, and a chance to shine.
Auth0’s approach is developer-first. Authentication and authorization should be almost invisible for users; what they really care about is the application or service for which the authentication and authorization is the gatekeeper. It’s the developers who really have to worry about authorization and authentication, and that’s why Auth0’s focus is on developers. Not only is the platform developer-focused, but they devote a lot of time and energy into educating developers — and not just about Auth0, but identity topics, and even programming in general.
Auth0 is remote work-friendly. When CEO Eugenio Pace and CTO Matias Woloski started Auth0, they did so while 7,000 miles apart. They’ve kept it up to this day, while people working from all over the world.
These two articles gave me a lot of useful information about what it would take to land a job there: Namely, a focused effort, the willingness to run through a series of gauntlets, as pictured below…
…and being ready to put in the energy to face their hiring funnel.
The numbers above aren’t for the position I applied for, but for other Senior Engineer positions.
I really wanted this job. In order to beat these odds, my number one priority for the six weeks to come was to crush this funnel.
Step 0: Sending in an application
This is a software-as-a-service company, and in the time honored tradition of indexing in software, the first step was Step 0! This involved filling out an application form and including the following “cover letter” which was actually a large text area on the application form.
Applicants were encouraged to explain why they should be considered for the job. I first wrote it in a text editor, saved it for my records, and pasted it into the form. Here’s what it said:
I’m a technical evangelist, developer, and tech community builder, and I would love to help Auth0 make the internet safer as a Senior R&D Content Engineer!
Even though COVID-19 caused my last job to evaporate, I’ve managed to keep busy:
I’ve spent the past five weeks in the inaugural cohort of the “UC Baseline” cybersecurity program offered by Tampa Bay’s security guild, The Undercroft. All the instructors will attest to my ability to not just absorb new material, but to communicate, cooperate, and share knowledge with others.
I’ve also been teaching an introductory Python course on behalf of Computer Coach Training Center. There was local demand for this course, but they didn’t have any Python instructors. They contacted me, having see my blog and recent presentations on game development in Python and Ren’Py.
Finally, I made revisions for the 2020 edition of the book iOS Apprentice, which teaches iOS app development by walking the reader through the process of writing four iPhone/iPad apps. I co-wrote the 2019 edition with Eli Ganim for RayWenderlich.com, and it spans 1500 pages.
In addition to this recent work, I’ve also done the following:
I’m the author/developer/presenter for the video tutorial Beginning ARKit, which teaches augmented reality application development by writing four ARKit-based iPhone/iPad apps.
I was the top-rated presenter at the RWDevCon 2018 mobile developer tutorial conference, where I gave both a four-hour workshop and a two-hour presentation on augmented reality programming for iOS with ARKit.
I have years of experience in technical communications and instruction, having done the following:
Provided wide-ranging partner and developer training as a Developer Evangelist at Microsoft, from providing presentations to partners, to writing articles and editing the Canadian edition of MSDN Flash to running hackathons, giving presentations, organizing conferences, and doing interviews with technology media. I was also Microsoft Canada’s most prolific blogger.
At GSG, I worked closely with their biggest partner, IBM, to help develop both the technical documentation and marketing messaging for their Network Infrastructure Cost Optimization offering, including writing, producing and narrating the promotional video.
Provided technical expertise to SMARTRAC’s partners as they used the Smart Cosmos platform and SMARTRAC RFID technology to keep track of goods and physical assets as they are manufactured, shipped, and sold.
Whenever someone asks me for advice about identity or authenticating and authorizing users in their applications, my stock answer is “Go with Auth0. They’ve already figured out the hard stuff.” With my unusual skill set and experience, I could do that in a more in-depth way at Auth0 as Senior R&D Content Engineer.
Step 1: A phone conversation with Wendy from the People Team
The application must’ve worked, because I made it to Step 1, the “recuriter screener” phase, where I talked to Wendy Galbreath from the People Team. As the Auth0 blog puts it, it wasn’t a tech interview, but “a high-level conversation about my experience — especially with remote work, interest in Auth0, the role and expectations.”
As I blogged that day:
All dressed up for a 📱 PHONE ☎️ interview. Sure, they won’t know I’m dressed up, but I’LL KNOW.
The interview itself took about a half hour, and I did about 90 minutes of prep beforehand, looking into at the Auth0 site, checking recent news about the company, and reviewing Wendy’s LinkedIn profile.
She went into detail about the perks of working for Auth0, which further reinforced my desire to join, and I told her about my background and work experience, and why I thought I’d be a valuable addition to the team, using my best “radio voice” while doing so.
Step 2: Zoom interview with Tony, Head of Content
I passed Step 0, which meant that three days later, I had a zoom conversation with Tony Poza, Auth0’s Head of Content. This conversation was a little more technical, where I talked about my experience developing software, overseeing the development of software, doing developer evangelism, and creating content.
This interview was just over an hour, and I did around 4 hours’ worth of prep and background reading, including the Auth0 documentation, articles on their developer blog, and looking into the OAuth2 protocol, which Auth0 uses.
I enjoyed talking with Tony, and the interview only made me want to work at Auth0 even more.
Step 3: Zoom interview with Holly and Dan, two Senior Engineers
I passed that second interview, so it was time for another Zoom conversation, this time with Senior R&D Content Engineers Holly Lloyd and Dan Arias. If hired, I’d be working with them every day, so it was in their best interest to get a better feel for who I am, what I can do, and if working with me would be a good experience.
This interview was also a shade over an hour, and I’d done around 8 hours’ worth of prep, background reading, and some noodling with Auth0 and Python.
The conversation was a lot of fun, and I left it thinking Yes, I can definitely work with this team.
Step 4: Technical exercise — article + code
I’ll admit without any shame that by this point, I was checking my email very regularly for messages from Auth0.
I didn’t have to wait long. Hours after the Step 3 interview, I’d been notified that I had moved to the Step 4: The technical exercise!
I was now at this point of the funnel:
This was a good place to be. With the major interviews done, passing was no longer subject to the vagaries of me having an off day or one of the interviewers being in a bad or at least unreceptive mood. This stage is all about proving that I could do the job and do so while working with my prospective teammates.
Most other engineering candidates at Auth0 are being hired to build, fix, or maintain the Auth0 service, so it makes sense that their exercise is to build some kind of technical project and then present it in a “demo call”, where they walk the interviewer through the project, explain their design decisions, and demonstrate the working solution.
As an R&D Content engineering candidate, my primary work output won’t be software, but content — documentation, instructions, articles, guides, and other material of that sort. My assignment was to write a “how to” article and the accompanying project. The idea is to showcase things like:
Problem-solving and data sourcing technique
Resourcefulness
Writing and language proficiency
Attention to detail
Creativity
The assignment: Create a tutorial blog post explaining how to build and secure an API with Spring Boot, Kotlin, and Auth0.
My first thoughts:
Securing an API with Auth0. That makes sense.
Kotlin — nice! That’s definitely in my wheelhouse.
Spring Boot? I know what Spring is, and have made a career out of avoiding it. What the hell is Spring Boot?
Since the exercise is partly a test of creativity, I was free to determine the kind of API that the reader of the tutorial would build. I thought I’d make it fun:
It was an API for a catalog of hot sauces. For the benefit of the curious, here’s a summary:
API endpoint
Description
GET api/hotsauces/test
Simply returns the text **Yup, it works!**
GET api/hotsauces
Returns the entire collection of hot sauces.
Accepts these optional parameters:
brandNameFilter: Limits the results to only those sauces whose `brandName` contains the given string.
sauceNameFilter: Limits the results to only those sauces whose `sauceName` contains the given string.
descFilter: Limits the results to only those sauces whose `description` contains the given string.
minHeat: Limits the results to only those sauces whose `heat` rating is greater than or equal to the given number.
maxHeat: Limits the results to only those sauces whose `heat` rating is less than or equal to the given number.
GET api/hotsauces/{id}
Returns the hot sauce with the given id.
GET api/hotsauces/count
Returns the number of hot sauces.
POST api/hotsauce
Adds the hot sauce (provided in the request).
PUT api/hotsauces/{id}
Edits the hot sauce with the given id and saves the edited hot sauce.
DELETE api/hotsauces/{id}
Deletes the hot sauce with the given id.
The article I wrote first walked the reader through the process of building the API. Once built, it then showed the reader how to secure it so that the endpoints for CRUD operations require authentication, while the “is this thing on?” endpoint remained public.
I wasn’t alone during the exercise. They set up a Slack channel to keep me in touch with the team I was hoping to join, and it’s standard procedure to assign you a “go-to” person (Dan was mine). I maintained a good back-and-forth with them, keeping them apprised of my progress, asking questions, and once or twice even sharing photos of what I was making for dinner.
While they said I could take as long as I felt I needed to complete the project, I figured that I needed to keep a balance between:
giving myself enough time to handle all the unknowns and deliver a finely-honed article and accompanying project, and
not taking so long that I end up being disqualified. As Steve Jobs put it so succinctly: Real artists ship.
On Day 2 of the project, while I was deep into working out how to use Spring Boot, a house down the street got connected to Frontier fiber internet. In the process, our house got disconnected. Luckily, I saw the truck down the street and straightened things out with the tech while he was still there.
I spent one Saturday working on the project with my computer tethered to my phone. Had I not caught the tech in time, the soonest I’d have been able to get someone to reconnect me would’ve been on Wednesday, a good four days later.
There came a point when I decided that the exercise was done and ready for evaluation. I made my final push to the repo and notified the team on Slack:
@channel I’d like to extend my most heartfelt thanks to everyone for this opportunity. It’s been fun, and I learned quite a bit in the process! As always, if there are any questions that you’d like me to answer, or anything else I can do for you, please let me know.
And then it was time to sit and wait. I checked Slack and my email a lot over those couple of days.
Step 5: BOSS FIGHT! (Actually, an interview with Jarod, Director of Developer Relations)
I got an email three days later — a Friday afternoon — asking if I would be up for a last-minute Zoom interview with Jarod Reyes, Director of Developer Relations, who came to Auth0 in June from Twilio, where he was the Developer Evangelism Manager.
Naturally, I made myself available, and Step 5 took place late that afternoon, only a couple of hours after I got the email.
The webcam lights I’d ordered had arrived earlier that day, so I set them up quickly…
…and I had just enough time to do a quick screen test for the interview. And yes, the accordion didn’t just happen to be there; it was strategically placed in the shot:
The interview was friendly, brief, and half of it consisted of me asking Jarod questions about his plans for developer evangelism and content at Auth0.
With the call done, the weekend began. It’s been a while since I’ve impatiently waited for Monday to come around.
Step 6: The offer letter
Monday, September 28th: I checked my email a lot, and at 1:15 p.m., this message arrived:
Great news!
The team would like to extend an offer for you to join Auth0! Please let me know your availability today for a call so that I can share the details with you.
T minus one week
It’s been two weeks since I got the offer letter. Since then, I’ve signed it, filled out the standard paperwork, and even received the dongle for my company-issued MacBook Pro:
There’ve been some longer-than-usual shipping times for Apple products lately, but I’m not too bothered by that. I’m very pleased that I’m in and excited to be back in the developer relations / content game again.
What does this mean for the Tampa Bay tech scene?
For starters, it means that Auth0, a unicorn and player in the security space, has an increased Tampa Bay presence. (I’m not the only Auth0 employee, or “Auziro”, in the area.)
As part of the Developer Relations team, it’s my job to be part of the face that Auth0 presents to the developer community, and conversely, a way for the developer community to reach Auth0. I’m Tampa Bay’s “person on the inside”.
As a public-facing employee of a startup who service overlaps with security, I expect that I’ll be participating in local startup and security events — first virtual ones, and eventually, once we’ve all managed to control the pandemic, real-life ones.
And finally, as a public-facing Auth0 representative, as well as the writer of this blog and the Tampa Bay tech, entrepreneur, and nerd events list, I hope to represent Tampa Bay as an excellent place for techies to live, work, and play in.
Keep an eye on this blog, as well as the Auth0 blog! There are many interesting developments coming, especially if your interests are in software, startups, or security.
It works quite well — and better than I expected. While it’s light and takes up little space once collapsed, it’s a little too flimsy for someone who needs on-the-go lighting.
However, if you plan on keeping the rig in just one place and not travel with it, it’s a good setup for your video chats, meetings, interviews, classes, and so on. Check it out on Amazon.
The lights worked well for last night’s class and the previous week’s tech interview. I’ll write more about how the interview went soon.
You’ve decided to learn JavaScript (or just need a refresher), and
you’re short on cash due to the current economic situation
…you’re in luck! There are a couple of good books on JavaScript whose contents are available to read online, free of charge!
The first of these books is Eloquent JavaScript, Third Edition, written by Marijn Haverbeke and published by No Starch Press. It’s not just an introduction to JavaScript, but an introduction to programming in general. It’s beginner-friendly, which is one of the reasons why it’s the main book for the first part of the JavaScript/React course that I’m teaching.
The second book is JavaScript for Impatient Programmers, ECMAScript 2020 edition, written by Dr. Alex Rauschmeyer. Its coverage of JavaScript is more complete, but it’s a little less beginner-friendly, which is why it’s the backup book for my course. I’m going to incorporate some of its content into the course, and point students to the online edition if they’d like some additional reading material.
The folks at Computer Coach Training Center must like my work, because they have me teaching another course — a 12-week, 3-times-a-week, 4-hours-per-session Intro to JavaScript and React programming!
The Intro to JavaScript and React Programming course starts next Tuesday evening, and happens Tuesday and Thursday evenings and Saturday mornings for 12 weeks.
The first six weeks of the course will be dedicated to gaining a solid understanding of JavaScript programming. During that part of the course, the text will be Eloquent JavaScript, Third Edition, which remains one of the most-recommended books for beginners. I’ll use it as a basis, but also add some additional material and cover changes in the 2019 and 2020 versions of JavaScript.
The second six weeks of the course will be all about React.js — and nothing but React. Yes, people use React in combination with all sorts of other technologies, but in order to get a solid grounding in React, it’s helpful to start by working purely in React. Hence Pure React, May 2020 Edition (which includes the newly-introduced feature of hooks) is the text for this section of the course.
If you’ve ever been in any of my Tampa iOS Meetup sessions, you’ve seen my teaching technique — you’re not passively watching slides, but coding along with me, and even experimenting, just to see what happens. That’s I what I did with the Python class, and it’s what I’m going to do with the JavaScript/React class — enter code, see what happens, and gain experience along the way. It’s learning by doing.
If this course interests you, it starts next Tuesday, and you can sign up by contacting Computer Coach.