Hiring guide for Haxe Engineers

Haxe Developer Hiring Guide

Haxe is a high-level, cross-platform programming language first introduced in 2005 by its inventor, Nicolas Cannasse. It was developed with the aim to serve as a single language for all platforms, allowing developers to write code once and compile it anywhere (source: Haxe Foundation). The Haxe compiler can output applications targeting JavaScript, Flash Player, Neko VM among others. Its versatility has led it to be utilized in various industries including video game development and web application building (source: GitHub). As of today's digital landscape, Haxe continues evolving while maintaining its core principle of universal applicability.

Ask the right questions secure the right Haxe talent among an increasingly shrinking pool of talent.

First 20 minutes

General Haxe app knowledge and experience

The first 20 minutes of the interview should seek to understand the candidate's general background in Haxe application development, including their experience with various programming languages, databases, and their approach to designing scalable and maintainable systems.

How would you compile a Haxe program to a JavaScript file?
You would use the Haxe compiler with the -js flag, followed by the output filename. For example, 'haxe -js output.js MyProgram'.
What are the main advantages of using Haxe over other programming languages?
Haxe is a high-level, cross-platform language. It can be compiled to multiple target languages like JavaScript, Python, PHP, C++, and more. This provides a lot of flexibility and reusability of code.
Describe the difference between '==' and '===' in Haxe.
In Haxe, '==' is used for equality comparison and '===' is used for identity comparison. '==' checks if the values of two operands are equal or not. '===' checks if two operands refer to the same object or not.
How would you create a class in Haxe?
You would use the 'class' keyword followed by the name of the class. For example, 'class MyClass { }'. You can then add methods and properties to the class.
What are abstracts in Haxe and how would you use them?
Abstracts are a type in Haxe that allows you to create a new type based on an existing one, with its own methods and properties. You would use the 'abstract' keyword to declare an abstract.
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What you’re looking for early on

Does the candidate have a strong understanding of the Haxe programming language?
Has the interviewee demonstrated good problem-solving skills?
Do they have experience with cross-platform development?
Is the candidate comfortable working with different Haxe frameworks?

Next 20 minutes

Specific Haxe development questions

The next 20 minutes of the interview should focus on the candidate's expertise with specific backend frameworks, their understanding of RESTful APIs, and their experience in handling data storage and retrieval efficiently.

Describe the difference between a static and instance method in Haxe.
A static method belongs to the class itself and can be called without creating an instance of the class. An instance method belongs to an instance of the class and can only be called on an instance of the class.
How would you handle exceptions in Haxe?
You would use the 'try/catch' statement. The 'try' block contains the code that might throw an exception, and the 'catch' block contains the code that will be executed if an exception is thrown.
What are macros in Haxe and how would you use them?
Macros in Haxe are a way to generate code at compile time. You would use the 'macro' keyword to define a macro. Macros can be used for tasks like code generation, compile-time calculations, and conditional compilation.
Describe the difference between an interface and a class in Haxe.
An interface is a contract for a class, it defines a set of methods that a class must implement. A class in Haxe is a blueprint for creating objects, it can implement one or more interfaces.
How would you implement inheritance in Haxe?
You would use the 'extends' keyword. For example, if you have a class 'Animal' and you want to create a 'Dog' class that inherits from 'Animal', you would write 'class Dog extends Animal'.
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The ideal back-end app developer

What you’re looking to see on the Haxe engineer at this point.

At this point, a skilled Haxe engineer should demonstrate strong problem-solving abilities, proficiency in Haxe programming language, and knowledge of software development methodologies. Red flags include lack of hands-on experience, inability to articulate complex concepts, or unfamiliarity with standard coding practices.

Digging deeper

Code questions

These will help you see the candidate's real-world development capabilities with Haxe.

What does the following Haxe code do?
var str:String = 'Hello, World!';
This code declares a string variable 'str' with the value 'Hello, World!' and then prints it to the console.
What will be the output of the following Haxe code?
var a:Int = 10;
var b:Int = 20;
trace(a + b);
The output of this code will be '30'. It adds two integers 'a' and 'b' and prints the result to the console.
What does the following Haxe code do?
var arr:Array = [1, 2, 3, 4, 5];
This code declares an array of integers, removes the last element from the array using the 'pop' method, and then prints the modified array to the console. The output will be '[1,2,3,4]'.
What does the following Haxe code do?
import haxe.Constraints.Function;
var f:Function = function() {
trace('Hello, World!');
new Thread(f);
This code imports the 'Function' class from the 'haxe.Constraints' package, declares a function 'f' that prints 'Hello, World!' to the console, and then creates a new thread that executes this function.

Wrap-up questions

Final candidate for Haxe Developer role questions

The final few questions should evaluate the candidate's teamwork, communication, and problem-solving skills. Additionally, assess their knowledge of microservices architecture, serverless computing, and how they handle Haxe application deployments. Inquire about their experience in handling system failures and their approach to debugging and troubleshooting.

What are the different types of loops in Haxe and how would you use them?
Haxe supports several types of loops including 'for', 'while', and 'do-while'. You would use a 'for' loop when you know how many times you want to loop, a 'while' loop when you want to loop until a condition is false, and a 'do-while' loop when you want to loop at least once and then until a condition is false.
Describe the difference between public and private access modifiers in Haxe.
Public access modifier allows a class, method, or property to be accessed from anywhere. Private access modifier restricts the access to within the class itself.
How would you create and use a generic class in Haxe?
You would use the 'class' keyword followed by the class name and then the type parameter in angle brackets. For example, 'class MyGenericClass { }'. You can then use this class with any type.

Haxe application related

Product Perfect's Haxe development capabilities

Beyond hiring for your Haxe engineering team, you may be in the market for additional help. Product Perfect provides seasoned expertise in Haxe projects, and can engage in multiple capacities.