Helbiz - Full-stack technical test

This test is part of our hiring process at Helbiz for the Full-Stack Software Engineer role. The goal is to understand your development skills, coding style, how creative you are, and time management. Because the role is full-stack, we're going to ask you to develop a full-stack solution, and you shouldn’t spend more than 4-6 hours completing it.

Overview

We would like to see how you architect an application that pulls data from an outside API, formats it for a graphql API endpoint, and displays the data using using React.

1. pull data from our open GBFS API for /free_bike_status
2. create an API using (apollo-server-express or apollo-server-lambda) that formats the data and exposes a query so we can query by bike_id
3. create a single page app using React that renders the data from your graphql endpoint, and allows the user to query the API to get the latest status of a vehicle with bike_id

Instructions

1. Query our GBFS API

To get a list of vehicles and their current status, make a GET request to this endpoint:

https://api.helbiz.com/admin/reporting/arlington/gbfs/free_bike_status.json

The response looks like:

{
  "last_updated": 1603386427821,
  "ttl": 0,
  "data": {
    "bikes": [
      {
        "bike_id": "T6S1",
        "lat": 38.86484,
        "lon": -77.077003,
        "is_reserved": 0,
        "is_disabled": 0,
        "vehicle_type": "scooter"
      },
      {
        "bike_id": "P6Z2",
        "lat": 38.882187,
        "lon": -77.111713,
        "is_reserved": 0,
        "is_disabled": 0,
        "vehicle_type": "scooter"
      },
      ...
    ]
  }
}

2. Create a Graphql API

We want you to make a graphql API (apollo-server-express or apollo-server-lambda) that exposes this data via a query - if no parameters are included, your graphql endpoint should simply return the list of vehicles. If the parameter bike_id is included, your endpoint should only return the data for that vehicle.

HINT: read about graphql + apollo here: https://www.apollographql.com/docs/tutorial/introduction/

HINT: you should organize the vehicle data under a VehicleStatus type, and your query returns an array of these

BONUS: add some simple auth to your endpoint via a Bearer token

3. Create a React component

Create a single page app using React that renders the data from your graphql endpoint. It can be as simple as querying your graphql endpoint for all vehicle statuses on page load and rendering them using Material UI Table component.

In addition, create a search input allows the user to get most recent status of a vehicle with the given bike_id. This should query your API with the parameter for bike_id and render the updated vehicle status.

Get coding!

To start, fork this repository and submit a pull request with your finished app. We'll review and schedule a call so you can go over it with us. Be prepared to explain your code and any technical questions we may have.