- #Business management
- #Web development
- What are the ways to hire JS software developers, and how to choose one which will suit you most? Learn more about the nuances of hiring freelance, in-house, and outsourced specialists.
- There are numerous factors that influence the cost of a JS programmer. Find out how to hire such a developer, balancing between quality and price.
If we look at the benefits of this tool, no doubt, businesses opt for JS and related technologies to build their solutions. To name a few:
- Enables rapid development
- Rich ecosystem
- Can be used for full-stack development
- Highly compatible
- Large talent pool
- Vast developer community
The beneficial aspects of JS that are mentioned above are just several bright examples among many others. The companies that have embraced the power of this technology are PayPal, Capital One, Citibank, Uber, Trello, NASA, and many others.
Favored not only by businesses but also by developers, JS has managed to win the status of the most-used programming language, according to the Github 2021 Octoverse report. Another compelling argument that JS and related technologies are highly praised by the dev community can be viewed in the image below. Thus, according to the Stack Overflow 2021 Developer Survey, JS frameworks have strengthened their leading positions among the most commonly used front-end technologies.
Undoubtedly, the list of steps above is not the only possible scenario that can occur when you need to hire a js engineer. Certain factors, such as the type of employment model, the choice of the engagement model with the vendor, the approach towards interviewing, etc., may affect the way the entire process goes. We offer to explore the most common way of its completion.
Types of JS developers and their responsibilities
- Responsibilities of a front-end JS developer
Junior: develop the client side of the product, be able to work under the supervision of an experienced specialist, write tested JS code, know how to work with any of JS frameworks (e.g., Angular, React, Vue);
Middle: develop the client side of the product, write high-quality, tested JS code, conduct UI tests, know how to work with several JS frameworks (e.g., Angular, React, Vue), conduct code review of less experienced specialists, work without the supervision of more experienced coders;
Senior: develop the client side of the product, write advanced programming code, conduct UI tests, know how to work with several JS frameworks (e.g., Angular, React, Vue), conduct code review of less experienced specialists, design product architecture, consult regarding the choice of the technologies.
Responsibilities of a back-end JS developer
Junior: develop the server side of the product, be able to work under the supervision of an experienced specialist, write tested JS code, code and operate Node.js-based services;
Middle: develop the server side of the product, write high-quality, tested JS code, conduct code review of less experienced specialists, work without the supervision of more experienced coders, work with popular cloud providers, code and operate Node.js-based services, integrate APIs, conduct development and improvement of database schema, complete CI/CD configuration;
Senior: develop the server side of the product, write advanced programming code, work with popular cloud providers, code and operate Node.js-based services, integrate APIs, conduct development and improvement of database schema, complete CI/CD configuration, conduct code review of less experienced specialists, design product architecture, consult regarding the choice of the technologies.
- Responsibilities of full-stack JS developer
Junior: a mixture of junior JS front-end and back-end developer responsibilities;
Middle: a mixture of middle JS front-end and back-end developer responsibilities;
Senior: a mixture of senior JS front-end and back-end developer responsibilities.
Contact us, and we’ll help you find the one that fits your project.CONTACT US
As you can see, the responsibilities of JS specialists depend on two factors: qualification level and the developer’s role. Hence, depending on the tasks of your project the developer has to fulfill, the corresponding type of JS specialist should be hired.
|Frontend JS developer||Any of React/Angular/Vue + State Handler,|
HTML + CSS/SCSS
|Everything from the previous category + |
Docker, WebSocket, Webpack, Bootstrap, Material UI
|Everything from the previous category + profound knowledge of any JS framework (React/Angular/Vue), Design Patterns|
|Backend JS developer||Node.js, SQL||Everything from the previous category + Express/Hapi/Nest.js, ORM (Sequelize/TypeORM), NoSQL (Redis, MongoDB), Docker, TypeScript, WebSocket||Everything from the previous category + CI/CD, Cloud Services (Azure/GCP/AWS), GraphQL, Design Patterns|
|Fullstack JS developer||Node.js, SQL, Core-js, HTML + CSS||Everything from the previous category + any profound knowledge of any JS framework (React/Angular/Vue) + State Handler, Docker, Webpack||Mixture of front-end + back-end technologies|
Since we have explored JS developer roles, responsibilities, and skills, it’s time to figure out the way such specialists’ both hard and soft skills should be checked.
Finally, you may also opt for hiring freelance specialists, which means that the process of finding the right developer via the freelance platform is usually long and scrupulous since you will have to scan numerous profiles yourself to find the one who will meet your requirements most. We will explore each model of employment in more detail in the next sections.
However, each of these possible scenarios has the same goal — check the capabilities of the developer who will implement your product by verifying hard skills and identify whether the specialists will be able to work efficiently with other team members. So, let’s examine both parts.
Hard skills interview questions
There are numerous questions that you can ask JS specialists to verify their skills. Each senior specialist or tech lead who will conduct the tech part of the interview has their own approach to interviewing JS programmers and their own list of questions that they think are worth asking.
We have asked our senior JS developer, who has conducted multiple interviews and built his own JS team, to give us an example of those questions that he either asked in the course of the interview or suggested asking.
- Question 1: 0.1 + 0.2 = ? Why?
Expected answer: 0.30000000000000004
Explanation: base-10 system can only express fractions that use a prime factor of the base. The prime factors of 10 are 2 and 5. So 1/2, 1/4, 1/5, 1/8, and 1/10 can all be expressed cleanly because the denominators all use prime factors of 10. In contrast, 1/3, 1/6, 1/7, and 1/9 are all repeating decimals because their denominators use a prime factor of 3 or 7.
In binary (or base-2), the only prime factor is 2, so you can only cleanly express fractions whose denominator has only 2 as a prime factor. In binary, 1/2, 1/4, and 1/8 would all be expressed cleanly as decimals, while 1/5 or 1/10 would be repeating decimals. So 0.1 and 0.2 (1/10 and 1/5), while clean decimals in a base-10 system, are repeating decimals in the base-2 system the computer uses. When you perform math on these repeating decimals, you end up with leftovers that carry over when you convert the computer’s base-2 (binary) number into a more human-readable base-10 representation.
- Question 2: “b” + “a” + +”a” + “a” = ? Why?
Expected answer: “baNaNa”
Explanation: JS interpreter tries to coerce the second “a” to number (two “+” signs before it), which results in NaN.
- Question 3: type of NaN
Expected answer: number.
Explanation: although it says Not a number, NaN is treated as a numeric type.
Expected answer: there are no such functions.
- Question 5: 1.toString()
Expected answer: It will throw a SyntaxError.
Explanation: JS interpreter expects decimal places after the dot but doesn’t find any.
*Note from our senior JS developer: when conducting a tech interview, pay attention to the way the person responds. It may seem that tech questions presuppose concise answers. On the contrary, our specialist says that it’s important that the interviewee can show his ability to reflect and give logical and extensive answers so that you can see whether your mindset, way of thinking, and dealing with the set tasks match yours.
However, hard skills are just one constituent that should be verified when you are hiring a JS specialist. Non-technical skills that will show you the ability of the coder to interact with others shouldn’t be neglected either.
Soft skills interview
As we have explored in the section above, there are several popular options to hire a JS programmer. Let’s check them out.
Pros: Flexibility of specialists, a large talent pool on freelance platforms, and a vast range of rates that can meet any budget.
Cons: Possible security risks, the mismatch between the claimed and real experience and skillset, high chances of poor code quality, absence of deep immersion into your project, and chances of miscommunication.
Popular platforms: Upwork, Arc.dev, Fiverr, Guru, Toptal
In-house specialists: the local market is at your disposal
Pros: On-site availability, deeper immersion into the business and project, immediate communication and problem fixing, and higher team engagement.
Cons: More expensive than freelancers and JS developers hired from software vendors, the necessity to monitor and maintain retention rate, multiple hidden costs, takes a long time to assemble the right team, high responsibility for the team and product outcome.
Cooperation with a software vendor
Pros: Whether you need to outsource front-end development or go with outstaffing, you will gain a plethora of benefits with either of these options. For instance, the better quality of the delivered product compared to freelancers, the ability to delegate the management of your project, the ability to scale up and down the team and extend it with other professionals, and higher chances of better domain knowledge.
Cons: rates per hour if you choose the outstaffing model, for instance, can be higher compared to freelancers, there may be less control over product development in case of outsourcing, the possibility of starting cooperation with an unreliable IT vendor.
Interested in choosing a cost-efficient way to hire a JS developer by cooperating with a trusted offshore software vendor? Check our step-by-step guide to learn how.
So, which one to choose?
The key point to rely on when deciding which type of developer you need to employ is the scale of your project. Freelancers are normally perfect for short-time projects and the completion of one-time tasks. Outsourcing or outstaffing is great for startups when their projects are large-scale, long-term, and may possibly have vague requirements or established companies that need to extend their in-house teams easily. Finally, in-house JS developers are more suitable for product companies or those that require on-site employees for constant maintenance and monitoring of their products.
The cost to hire a JS programmer depends on multiple factors, such as the level of communication, location, skill set, etc. However, one of the core factors that affect that JS developer’s cost is the hiring model you choose. Let’s consider the range of salaries and hourly rates depending on each of them.
|Country||JS developers’ average salary|
|Country||JS developers’ average hourly rates|
|Western Europe (e.g., Germany)||$50—65|
|Eastern Europe (e.g., Ukraine)||$35—55|
We have explored only a few examples of the salary range of JS developers to help you form a general image of how the cost differs depending on the location and type of employment. The employment of in-house specialists is the most expensive option compared to others since it always presupposes various hidden costs. As we already stated in the previous section, the choice when you are looking for js developers for hire should be made based on the scale of your product, your business requirements, your budget, and the way you need the project to be managed.
- We’re flexible in terms of cooperation and pricing models. We have expertise in providing both JS outsourcing services as well as the composition of dedicated teams and outstaffing.
- Our JS team has expertise in full-cycle software development, which means the work on the projects from the initial stages up to further development and product deployment.
- We cover more than 20 industries, including healthcare, e-commerce, e-learning, real estate, IoT, and many others. Take a look at the table below that shows several successfully developed JS projects that we can disclose.
|pr.business||The client’s request was to create a local-search directory from scratch that would be capable of aggregating information about local SMBs and managing digital listings from Foursquare, Yelp, Google my Business, and others. ||The solution turned out to be a feature-rich platform that provides business owners with tools to control information about their business and helps them boost brand awareness in a cost-saving yet efficient way.|
|Genesys PGR||The client turned to us with the request to transform an outdated PHP-based website using modern technologies. The main requirement was to keep the data secure and the platform fully operating in the course of the product’s upgrade.||Our fruitful cooperation with the client resulted in the creation of a top-notch solution of global importance.|
|Grin-global community edition||The task was to upgrade the product by changing the initially chosen tech stack, turning it into a secure platform for genebank specialists and constantly maintaining it, supporting its seamless functioning, and expanding existing functionality upon request.||Our contribution to the project development helped design a robust system for genebanks that simplifies the activities of genebanks’ stuff, provides fast access to current information about each sample, enabling better allocation of their limited resources and prioritization of activities.|
Learn more about the JS services we provide, the types of custom JS solutions we can create, and examples of implemented products.
There are three popular options that you can use to hire a JS developer: hire a freelance specialist, employ an in-house programmer, or collaborate with a trusted software vendor. To figure out which one you need, consider the scale of your project. Freelancers are good for short-time projects and the completion of one-time tasks. Outsourcing or outstaffing is great for startups when their projects are large-scale, long-term, or established companies that need to extend their in-house teams. Finally, in-house JS developers are more suitable for product companies or those that require on-site employees for constant maintenance and monitoring of their products.
What steps are part of the JS developer hiring process?
How to identify what skills a JS developer should have?