Typing in email addresses on web is error prone, and time consuming. The goal here is to reduce typos, mistakes, and save time entering addresses by using autocomplete and validation.
Your objective is to build an incredible experience for users entering a single email address into a text field, while at the same time impressing us with how simple and clean your code is.
We receive many submissions daily, yours needs to stand out. We'd love to be impressed by the user interface, by your code, and by the little touches that make it slick.
Invoice Simple's customers are owner operators who run their own business, such as plumbers, cleaners, contractors etc. They are not very tech savvy, and as such need user interfaces that "just work".
Email format validation
Example: "alex@gmail" is not a valid email
The user interface should indicate whether or not the email address is valid
Where appropriate the interface should indicate what is wrong with the address
Email deliverability validation
Users often typo an address, for example wrong domain name (gmail.con vs gmail.com), or just mis type it
Use an existing API to confirm the email address can be delivered to, we recommend getting a free account at kickbox.io, and using their API
Where appropriate the interface should indicate what is wrong
Autocomplete domain names
Typing email addresses is a pain, wouldn't it be nice if we didn't have to type the whole thing in?
We have observed that most email addresses end in popular domain names such as gmail.com, yahoo.com
Your autocomplete should suggest likely domain names and complete addresses
For example if the user types "alex@" we'd expect suggestions based on most popular domains, say "firstname.lastname@example.org", "email@example.com", ...
If the user refines and types "alex@g" we'd expect suggestions based on popular domains beginning with g eg "firstname.lastname@example.org", "email@example.com", ...
You should build
React.js app, written in
typescript that we can load on Chrome or Safari browser.
The app should have one screen, with one text box, that we can type an email address into
Using the Kickbox API usually causes a challenge with CORS. One solution we've seen people use is to use a simple NodeJS server to serve the app, and provide an endpoint that will make the Kickbox API request on the app's behalf.
Your solution will be evaluated against the following criteria:
We were able to easily build and run your code using
npm i and
npm start on our Macs in the office.
Code quality - is your code clean, simple, commented, modern, well designed
User experience - how simple, intuitive and clear is the UI
UI - make sure you're using a good layout, simple/modern colors. It's best to stick with current standards.
Error handling - your code should handle potential errors gracefully
Do not place your code on GitHub or any other source version control platform.
Please email us a zip file, that we can unzip, do
npm i , and run using
The cleaner/simpler your zip file the better, we don't want to see any binaries, or other things you wouldn't check into version control.
Send your submission to firstname.lastname@example.org, with subject Web coding challenge.
If you've never emailed us before, be sure to include a link to your resume/linkedIn and role you are applying for.
If you have time/interest, we'd love to see automated tests that you'd use to get confidence everything is working as expected