We find, vet, and place world-class JavaScript developers who work your hours, speak your language, and drive your business forward. Zero freelancers and outsourcing fluff —just top-tier devs ready to go.
We don’t just test for technical skills—we assess for collaboration, communication, and time-zone compatibility. Because the best JavaScript developer is the one who fits your team.
While others scrambled to go remote, we’ve been building high-performing distributed teams for over a decade. We know what works (and what doesn’t).
We present your shortlist in under 7 days. No bloated processes, no endless interviews. And if you’re not happy, we replace for free.
When seeking out only the most qualified engineers for the Javascript role, it‘s crucial for you to take a hands–on approach to the hiring process. It‘s not just about technical skills, but also about finding someone who fits with your company culture. We can help you with that.
As soon as you talk with us or fill out our form, the first thing we do is analyze your company. We set up a call with you to understand your culture and the type of people you value working with. Here’s how:
We reach out to hundreds of candidates that we think might be a possible match for you. In 2 weeks, you’ll start reviewing people that match your requirements. We focus on providing you 3-5 top candidates instead of giving you an endless list.
Once you select the candidate, we handle all the contracts and payments from day 1. We also take the legal steps required to protect your IP.
By hiring in countries with a lower cost of living, your budget will stretch farther, while your developers will be earning exactly how much they want.
The best people already have a job. We find senior Javascript developers only, working in established companies–and bring them to your team.
You’ll see 3-5 CVs of outstanding people within two weeks of our discovery call. 80% of our clients hire from that first batch.
The Javascript candidates you’ll interview will have been chosen to match your company’s culture and values. They’ll feel right at home, reducing your turnover.
No freelancers, no consultants, no outsourcing. Only full-time.
Hire career-driven developers ready to be part of your company.
Rest easy knowing your hires are well cared for. Our HR service handles global contract payments for you and provides social-emotional support to keep them performing at their best.
Marketplaces are built for speed, not fit. You get flooded with unvetted applications and end up spending more time filtering than hiring. With us, you skip the noise and get developers who are already tested, proven, and ready to integrate with your team—no guessing, no gamble.
Upwork offers access to thousands of freelancers—but it puts the screening, interviewing, and vetting on you. A remote recruitment agency like ours handles the heavy lifting: we deliver developers who are technically assessed, culturally aligned, and committed to long-term work. No bidding wars, no surprise dropouts, just consistent, high-quality results.
1. What is DOM?
DOM is the Document Object Model and is used by HTML to represent the elements and contents of a page.
JavaScript can be used to manipulate this model, which is why it’s such a prevalent language in web development.
2. What are the data types JavaScript uses?
There are both primitive types and non-primitive types. Primitive types represent basic types such as numbers and strings.
| typeof ‘DistantJob’ // Returns “string” typeof “DistantJob” // Returns “string” typeof 5 // Returns “number” typeof 5.5 // Returns “number” typeof true // Returns “boolean” typeof 178233587725359997576391063983941630941986816n // Returns bigint typeof undefined // Returns “undefined” typeof null // Returns “object”, a common pitfall of JavaScript typeof Symbol(‘symbol’) // Returns Symbol |
Non-primitive types can be objects housing complex data structures (such as a vector or a coordinate) or arrays to store variables.
| var vector = { x: 10, y: 5.0, z: 10.5 }var array = [“A String”, 5, false] |
3. What is Implicit Type Coercion in JavaScript?
When operations are performed between two variables of different data types, JavaScript automatically converts the types in order to carry out the operation.
When adding a number to a string, the number is automatically converted to a string as well.
| var a = 5; var b = “5”; a + b // Returns “55” |
However, when subtracting the opposite occurs and the string is converted to a number.
| var a = 5; var b = “5”;a – b // Returns 0 |
4. What are the differences between the comparisons “==” and “===”?
This answer is closely related to the Implicit Type Coercion mentioned above.
| var a = 5; var b = “5”;(a == b) // Returns true, since the values are the same (a === b) // Returns false, since a is a number and b is a string |
5. What are callbacks?
Callbacks are functions that get executed when certain conditions are met (usually at the end of a function’s execution). They can be passed as parameters to another function so it can be executed inside its body or stored as an object’s property. It’s commonly used to signal a function´s correct or incorrect execution.
| function odd(value){ console.log(value + ” is odd!”); }function even(value){ console.log(value + ” is even!”); }function checkNumber(num,oddFunction, evenFunction){ if(number % 2 == 0) { evenFunction(num); } else { oddFunction(num); } }checkNumber(“5, odd, even); // Prints “5 is odd!” checkNumber(10, odd, even); // Prints “10 is even!” |
1. What are the differences between declaring variables with the keywords var, let and const?
When the ECMAScript 6 (ES6) version was introduced in 2015, it introduced two new keywords to declare variables outside the traditional global scope of the var keyword: let and const. These add further control to the accessibility of variables within the code:
| var | let | const | |
| Global Scope | Yes | No | No |
| Function Scope | Yes | Yes | Yes |
| Block Scope | No | Yes | Yes |
| Can be reassigned? | Yes | Yes | No |
2. What is the prototype design pattern?
The prototype design pattern allows developers to set up default values for objects, initializing them. It is commonly used to define functions inside objects before the introduction of ES6 or to define new properties of existing object constructors.
| function Person(name,age){ this.name = name; this.age = age; }Person.prototype.job = “JavaScript Developer”;Person.prototype.getDetails = function() { return “Name: ” + this.name + “, Age: ” + this.age + “, Job: ” + this.job; }var damian = new Person(“Damian”, 31); damian.getDetails(); // Returns “Name: Damian, Age: 31, Job: JavaScript Developer” |
3. What are classes in Javascript?
Classes were introduced in ES6 and are syntactic sugar for constructor functions. These objects hold pertinent data and can house functions to operate over said data.
Before ES6, to emulate classes, you’d have to do something like:
| function Person(name,age){ this.name = name; this.age = age; } Person.prototype.getDetails = function(){ return ‘Name: ${this.name}, Age: ${this.age}’; } var anna = new Person(“Anna”, 16); anna.getDetails(); // Returns “Name: Anna, Age: 16” |
With ES6, this while process got much simpler with the introduction of proper classes:
| class Person{ constructor(name,age){ this.name = name; this.age = age; } getDetails(){ return ‘Name: ${this.name}, Age: ${this.age}’; } } let ian = new Student(“Ian”, 22); ian.getDetails(); // Returns “Name: Ian, Age: 22” |
4. What are arrow functions?
Also introduced in ES6, arrow functions are ways to declare expression-based functions with shorter syntax.
Before ES6, functions needed to be declared as:
| var square = function (num) { return num * num; }var sum = function (num1, num2) { return num1 + num2; } |
In ES6, they can be declared as:
| var square = num => num * num;
var sum = (num1, num2) => num1 + num2; |
Another functionality introduced in ES6, the rest parameter allows functions to receive an undefined number of arguments.
| var sumAll= function (…inputs) { let sum = 0; for(let i of inputs){ sum += i; } return sum; }// These calls are valid sumAll(1); sumAll(1, 2); sumAll(1, 2, 3); sumAll(1, 2, 3, 4); sumAll(1, 2, 3, 4, 5); |
The rest parameter can be used alongside other defined inputs, but must always be the last one in the function’s definition.
| var sumAll2 = function (a, b, …otherInputs) { let sum = a + b; for(let i of otherInputs){ sum += i; } return sum; } // This call is invalid, since b is undefined sumAll2(1); // These calls are valid sumAll2(1, 2); sumAll2(1, 2, 3); sumAll2(1, 2, 3, 4); sumAll2(1, 2, 3, 4, 5); |
In the US, the cost of hiring a Senior JavaScript Developer is $115.000/year. Talent.com indicates $136.500/year, Indeed $111.308/year, and Glassdoor $110,860/year. However, the annual salary depends on the geographical area, skill set, work arrangement, and year of experience.
If you recruit in different places outside the US, you can find talented and experienced candidates at affordable costs. In some countries, the living costs are lower. You can offer a convenient contract for a full-time remote position, ensuring a talented addition to your team and reducing your turnover rate. Here is an overview of the Annual salary for JavaScript developers outside the US:
Get matched with your ideal JavaScript developer—pre-vetted, timezone-aligned, and ready to code.
When you partner with DistantJob for your next hire, you get the highest quality developers who will deliver expert work on time. We headhunt developers globally; that means you can expect candidates within two weeks or less and at a great value.
Increase your development output within the next 30 days without sacrificing quality.
