Golo Developer Hiring Guide

Hiring Guide for Golo Engineers

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

Golo is a lightweight, dynamic, and simple programming language for the Java Virtual Machine (JVM), developed primarily by the Dynamid research team at the CITI Laboratory in Lyon, France. Launched in 2012, it was designed to be an easy-to-learn language for Java developers, offering a simpler syntax while maintaining the ability to leverage the vast Java ecosystem. Golo supports imperative and functional programming styles, and its dynamism makes it a powerful scripting tool for JVM. The language also integrates seamlessly with existing Java libraries and frameworks, providing a bridge between Java and dynamic languages. Golo's source code is open-source and is available on GitHub for public access and contribution.

First 20 minutes

General Golo knowledge and experience

The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.

What are augmentations in Golo?

Augmentations in Golo allow you to add methods to existing types, which can be useful for extending the functionality of a type without modifying its source code.

How would you create a function in Golo?

In Golo, you can create a function using the 'function' keyword followed by the function name, parameters in parentheses, and the function body enclosed in braces.

Describe the difference between Golo and Java.

While both run on the JVM, Golo is dynamically typed and supports functional programming, whereas Java is statically typed and primarily supports object-oriented programming.

What are the key features of Golo?

Golo is lightweight, easy to learn, supports imperative and functional programming, and has first-class functions and augmentations, among other features.

How would you define Golo?

Golo is a simple, dynamic, weakly typed language for the Java Virtual Machine (JVM), with a special emphasis on concurrent programming.

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What youre looking for early-on

Has the candidate shown the ability to work as part of a team?

Software development is often a collaborative effort. A candidate's ability to work effectively as part of a team is important for project success.

Can the candidate solve problems and debug using Golo?

Problem-solving and debugging are crucial skills for any developer. The candidate should be able to use Golo to solve problems and debug code effectively.

Does the candidate understand the JVM and how to use Golo with it?

Since Golo is a JVM language, understanding of JVM is crucial for performance optimization and better utilization of Golo.

Does the candidate have experience with functional and object-oriented programming?

Golo is a functional and object-oriented language. Having experience in both paradigms will allow the candidate to write more efficient and cleaner code.

How proficient is the candidate in handling Golo's dynamic and static typing?

Golo's typing system is one of its unique features. Proficiency in handling it shows the candidate's ability to leverage Golo's features to its full potential.

Has the candidate demonstrated a firm understanding of Golo language?

Knowledge of Golo is essential for the job role. If the candidate has a solid understanding of the language, they can effectively develop and maintain Golo-based applications.

Next 20 minutes

Specific Golo development questions

The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.

How would you create and use a closure in Golo?

You can create a closure in Golo by enclosing a block of code in parentheses and using the '->' operator. You can then call the closure using its name followed by any necessary arguments in parentheses.

What are closures in Golo?

Closures in Golo are blocks of code that can be passed around as values and executed on demand. They can capture and access variables from their surrounding scope.

How would you handle exceptions in Golo?

Golo uses 'try/catch' blocks for exception handling, similar to Java. You can also use the 'throw' keyword to throw an exception.

Describe the difference between 'let' and 'var' in Golo.

'let' is used to declare a constant, while 'var' is used to declare a variable that can be reassigned.

How would you use augmentations in Golo?

You can use the 'augment' keyword followed by the type you want to augment and a block of methods to add to that type.

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The ideal back-end app developer

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

A skilled Golo engineer should demonstrate proficiency in Golo language, problem-solving skills, and experience with JVM and its interoperability. Red flags would include inability to provide specific examples of past projects or struggles to explain complex concepts clearly.

Digging deeper

Code questions

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

What does this simple Golo code do?

module hello.World

function main = |args| {
  println('Hello, world!')
}

This is a basic 'Hello, World!' program in Golo. It prints 'Hello, world!' to the console.

What does this Golo code do?

module hello.World

function main = |args| {
  let x = 10
  let y = 20
  println('The sum is: ' + (x + y))
}

This Golo code declares two variables 'x' and 'y', assigns them the values 10 and 20 respectively, and then prints the sum of these two variables.

What does this Golo code do?

module hello.World

function main = |args| {
  let arr = array[1, 2, 3, 4, 5]
  foreach i in arr {
    println(i)
  }
}

This Golo code creates an array with five elements and then iterates over the array, printing each element to the console.

What does this Golo code do?

module hello.World

function main = |args| {
  let a = async(
    |n| -> n * n,
    10
  )
  println(a:get())
}

This Golo code creates an asynchronous task that squares a number. It then waits for the task to complete and prints the result. In this case, it will print 100.

What does this Golo code do?

module hello.World

struct Point = { x, y }

function main = |args| {
  let p = Point(10, 20)
  println('Point: ' + p:x() + ', ' + p:y())
}

This Golo code defines a struct 'Point' with two fields 'x' and 'y'. It then creates an instance of 'Point' and prints the values of 'x' and 'y'.

What does this Golo code do?

module hello.World

function main = |args| {
  let a = array[1, 2, 3, 4, 5]
  let b = a: map(|n| -> n * n)
  println(b)
}

This Golo code creates an array 'a' and then creates a new array 'b' by squaring each element of 'a'. It then prints the array 'b'.

Wrap-up questions

Final candidate for Golo role questions

The final few interview questions for a Golo candidate should typically focus on a combination of technical skills, personal goals, growth potential, team dynamics, and company culture.

How would you create and use a class in Golo?

You can create a class in Golo using the 'class' keyword followed by the class name and a block of code that defines the class's methods and variables. You can then create an instance of the class using the 'new' keyword.

Describe the difference between a struct and a class in Golo.

While both can hold multiple values, a struct is a simple data type with no methods, whereas a class can have methods and supports inheritance.

What are structs in Golo and how would you use them?

Structs in Golo are simple data types that can hold multiple values. You can create a struct using the 'struct' keyword followed by the struct name and a list of fields in parentheses.

How would you create a module in Golo?

You can create a module in Golo using the 'module' keyword followed by the module name and a block of code that defines the module's functions and variables.

Describe the difference between a closure and a function in Golo.

While both can be called with arguments and return a value, a closure can capture and access variables from its surrounding scope, whereas a function cannot.

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Golo application related

Product Perfect's Golo development capabilities

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

Golo Consultive assessments

Custom Golo development projects

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