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Mobile Developer Challenge: Stock Screener (Android/iOS)
Raw
mob-dev-challenge.md

Mobile Developer Challenge: Stock Screener (Android/iOS)

This challenge is designed to assess your understanding of basic Android (Kotlin) or iOS (Swift) development in a simulated Fintech environment.

📱 Objective

Build a mobile application that displays a stock screener with a list of stock data.

✅ Core Features

  • Display a list of popular stocks with their company names and current stock prices.
  • Allow users to mark/unmark stocks as favourites for quick access.

🌟 Bonus Features

  • Implement a search bar to filter the displayed stocks by company name.
  • Change the background colour of the stock price based on its change (e.g., green for positive change, red for negative change).

🧪 Evaluation Criteria

  • Functionality of displaying predefined stock data and refreshing it on demand.
  • User interface (UI) design for clear and informative display.
  • Code quality and adherence to best practices (e.g., architecture, clean code).
  • Approach to implementing the bonus features (if attempted).
  • Git commit hygiene and documentation.

🔧 Platform & Tech Guidelines

  • Platform: Build the app natively in either Android (Kotlin) or iOS (Swift).
  • Data Source: Use a static list of stocks in a local stocks.json file, or simulate data from a mock API.
  • Testing (Optional): Write basic unit tests for critical logic (e.g., search filtering or parsing).
  • Documentation: Provide setup instructions and your thought process in a README.md.
  • Version Control: Use Git and make meaningful commits with clear messages.

🚀 How to Submit

  1. Create a public repository on GitHub.
  2. Push your source code with a clear commit history.
  3. Include a README.md file with:
    • Setup instructions
    • Explanation of app structure
    • Any trade-offs or future improvements
  4. Share the repository link with us via email.

📘 Tips

  • Focus on building a clean, functional app with a user-friendly interface.
  • Use official documentation:
  • Use free design resources (e.g., dribbble, mobbin) for inspiration.
  • Be prepared to discuss your architecture choices, data management, and how you might integrate real-time APIs in the future.

Good luck! We’re looking forward to seeing how you approach this challenge.

Raw
stocks.json
{
"stocks": [
{
"id": 13,
"symbol": "AAPL",
"name": "Apple Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/AAPL.png",
"stock_price": {
"current_price": {
"amount": "169.98",
"currency": "USD"
},
"price_change": -1.5,
"percentage_change": -0.87
}
},
{
"id": 21,
"symbol": "ABCL",
"name": "AbCellera Biologics Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/ABCL.png",
"stock_price": {
"current_price": {
"amount": "4.44",
"currency": "USD"
},
"price_change": -0.05,
"percentage_change": -1.11
}
},
{
"id": 271,
"symbol": "AMD",
"name": "Advanced Micro Devices Inc.",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/AMD.png",
"stock_price": {
"current_price": {
"amount": "183.32",
"currency": "USD"
},
"price_change": 3.73,
"percentage_change": 2.08
}
},
{
"id": 308,
"symbol": "AMZN",
"name": "Amazon.com Inc.",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/AMZN.png",
"stock_price": {
"current_price": {
"amount": "180.93",
"currency": "USD"
},
"price_change": 0.55,
"percentage_change": 0.3
}
},
{
"id": 456,
"symbol": "ATEN",
"name": "A10 Networks Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/ATEN.png",
"stock_price": {
"current_price": {
"amount": "13.65",
"currency": "USD"
},
"price_change": -0.04,
"percentage_change": -0.29
}
},
{
"id": 1195,
"symbol": "COIN",
"name": "Coinbase Global Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/COIN.png",
"stock_price": {
"current_price": {
"amount": "252.77",
"currency": "USD"
},
"price_change": -3.93,
"percentage_change": -1.53
}
},
{
"id": 1216,
"symbol": "COST",
"name": "Costco Wholesale Corp",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/COST.png",
"stock_price": {
"current_price": {
"amount": "683.14",
"currency": "USD"
},
"price_change": -0.1,
"percentage_change": -0.01
}
},
{
"id": 1265,
"symbol": "CRM",
"name": "Salesforce.Com Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/CRM.png",
"stock_price": {
"current_price": {
"amount": "302.27",
"currency": "USD"
},
"price_change": 1.09,
"percentage_change": 0.36
}
},
{
"id": 1481,
"symbol": "DIS",
"name": "Walt Disney Co (The)",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/DIS.png",
"stock_price": {
"current_price": {
"amount": "121.53",
"currency": "USD"
},
"price_change": 0.55,
"percentage_change": 0.45
}
},
{
"id": 1525,
"symbol": "DOCU",
"name": "DocuSign Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/DOCU.png",
"stock_price": {
"current_price": {
"amount": "58.27",
"currency": "USD"
},
"price_change": -1,
"percentage_change": -1.69
}
},
{
"id": 1849,
"symbol": "F",
"name": "Ford Motor Co.",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/F.png",
"stock_price": {
"current_price": {
"amount": "13.29",
"currency": "USD"
},
"price_change": 0.01,
"percentage_change": 0.08
}
},
{
"id": 1863,
"symbol": "META",
"name": "Meta Platforms Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/FB.png",
"stock_price": {
"current_price": {
"amount": "491.67",
"currency": "USD"
},
"price_change": 6.09,
"percentage_change": 1.25
}
},
{
"id": 2279,
"symbol": "GOOG",
"name": "Alphabet Inc - Class C",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/GOOG.png",
"stock_price": {
"current_price": {
"amount": "156.50",
"currency": "USD"
},
"price_change": 4.56,
"percentage_change": 3
}
},
{
"id": 2407,
"symbol": "HD",
"name": "Home Depot, Inc.",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/HD.png",
"stock_price": {
"current_price": {
"amount": "368.00",
"currency": "USD"
},
"price_change": -15.6,
"percentage_change": -4.07
}
},
{
"id": 2710,
"symbol": "INTU",
"name": "Intuit Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/INTU.png",
"stock_price": {
"current_price": {
"amount": "639.44",
"currency": "USD"
},
"price_change": -10.56,
"percentage_change": -1.62
}
},
{
"id": 2939,
"symbol": "KO",
"name": "Coca-Cola Co",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/KO.png",
"stock_price": {
"current_price": {
"amount": "60.68",
"currency": "USD"
},
"price_change": -0.5,
"percentage_change": -0.82
}
},
{
"id": 3246,
"symbol": "MCD",
"name": "McDonald`s Corp",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/MCD.png",
"stock_price": {
"current_price": {
"amount": "280.09",
"currency": "USD"
},
"price_change": -1.86,
"percentage_change": -0.66
}
},
{
"id": 3454,
"symbol": "MSFT",
"name": "Microsoft Corporation",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/MSFT.png",
"stock_price": {
"current_price": {
"amount": "424.57",
"currency": "USD"
},
"price_change": 3.85,
"percentage_change": 0.92
}
},
{
"id": 3593,
"symbol": "NET",
"name": "Cloudflare Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/NET.png",
"stock_price": {
"current_price": {
"amount": "95.66",
"currency": "USD"
},
"price_change": -0.89,
"percentage_change": -0.92
}
},
{
"id": 3611,
"symbol": "NFLX",
"name": "NetFlix Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/NFLX.png",
"stock_price": {
"current_price": {
"amount": "614.08",
"currency": "USD"
},
"price_change": 6.75,
"percentage_change": 1.11
}
},
{
"id": 3639,
"symbol": "NKE",
"name": "Nike, Inc. - Class B",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/NKE.png",
"stock_price": {
"current_price": {
"amount": "92.56",
"currency": "USD"
},
"price_change": -1.42,
"percentage_change": -1.51
}
},
{
"id": 3851,
"symbol": "OKTA",
"name": "Okta Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/OKTA.png",
"stock_price": {
"current_price": {
"amount": "103.50",
"currency": "USD"
},
"price_change": -1.42,
"percentage_change": -1.35
}
},
{
"id": 3903,
"symbol": "ORCL",
"name": "Oracle Corp.",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/ORCL.png",
"stock_price": {
"current_price": {
"amount": "125.47",
"currency": "USD"
},
"price_change": -0.14,
"percentage_change": -0.11
}
},
{
"id": 4101,
"symbol": "PINS",
"name": "Pinterest Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/PINS.png",
"stock_price": {
"current_price": {
"amount": "35.31",
"currency": "USD"
},
"price_change": 0.43,
"percentage_change": 1.23
}
},
{
"id": 4287,
"symbol": "PYPL",
"name": "PayPal Holdings Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/PYPL.png",
"stock_price": {
"current_price": {
"amount": "65.16",
"currency": "USD"
},
"price_change": -1.41,
"percentage_change": -2.12
}
},
{
"id": 4349,
"symbol": "RBLX",
"name": "Roblox Corporation - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/RBLX.png",
"stock_price": {
"current_price": {
"amount": "37.86",
"currency": "USD"
},
"price_change": -0.02,
"percentage_change": -0.05
}
},
{
"id": 4581,
"symbol": "SBUX",
"name": "Starbucks Corp.",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/SBUX.png",
"stock_price": {
"current_price": {
"amount": "91.52",
"currency": "USD"
},
"price_change": 0.13,
"percentage_change": 0.14
}
},
{
"id": 4670,
"symbol": "SHOP",
"name": "Shopify Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/SHOP.png",
"stock_price": {
"current_price": {
"amount": "78.21",
"currency": "USD"
},
"price_change": -0.41,
"percentage_change": -0.52
}
},
{
"id": 4752,
"symbol": "SNAP",
"name": "Snap Inc - Class A",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/SNAP.png",
"stock_price": {
"current_price": {
"amount": "11.24",
"currency": "USD"
},
"price_change": -0.21,
"percentage_change": -1.83
}
},
{
"id": 4801,
"symbol": "SPLK",
"name": "Splunk Inc",
"logo_url": "https://storage.googleapis.com/iexcloud-hl37opg/api/logos/SPLK.png",
"stock_price": {
"current_price": {
"amount": "156.92",
"currency": "USD"
},
"price_change": 0.41,
"percentage_change": 0.26
}
}
]
}
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