A Guide to Hiring a React.js Developer

As every organization seeks to create new tools and frameworks to gain ultimate efficiency, software development keeps evolving. There is a necessity to stay up-to-date on all the current trends. One such trend is the new library React.js that is creating quite a buzz in the Developers’ community. To keep up with the trend, you need to hire a good React.js Developer to get the project off the ground.
Finding a good and qualified Developer who will live up to your expectations seems like an impossible task. However, you need to get your project off the ground and you have to get a Developer to do it. You do not need to worry because this article gives you all the guideline you need to grasp in order to hire the best React.js Developer. Before getting into the guidelines, you need to understand what React.js is.
What is React.js?
React.js is a JavaScript library used for front-end developments and real time processes. It is a very lightweight simple library with reusable components and deals with only the view layer. React uses babel compiler to compile JSX to JS. It is more or less like Angular and Facebook makes it.
React uses State and Props. State is an object or an array that holds data for React components. Every time you want to change anything, all you do is change the State object. After that, React creates Shadow DOM and re-renders from there giving you no reason to touch DOM.
React is extremely popular, easy to read and easy to maintain. Its popularity does not come about because Facebook made it, but because its demand is extremely high. Some of the reasons that make React.js popular are:
• Efficiency
Its virtual DOM features are a major performance boost especially with one-step DOM updates. It increases productivity as it has the ability to compartmentalize components and use them throughout any project.
• Great for SEO
React runs on a server and returns virtual DOM to the web page or browser making it great for SEO.
• Easy to write on JavaScript
Because React.js uses JSX that has a special syntax, it allows the mixing of HTML with JavaScript. It gets easier to drop a bit of HTML in a render function without concatenating strings thus turning HTML into simple functions that have a special JSX Transformer.
• Out-of-box Developer tools
React.js makes it easier to debug applications.
• It is easy to write on UI test cases because of the virtual DOM implemented in JS.
However as good as React.js is, it is only a view layer and it requires some configurations when integrating it into a traditional MVC framework like rails. Anyone learning React.js for the first time has to go through a learning curve.
Hiring a React.js Developer
Hiring the best React.js Developer is not a very task. It is however, the first task in getting your project off the ground. The first thing you need to understand is what the work of React.js Developer is. This is what a React.js does:
• Specializes in the building of high-performance apps and UI components especially those that need a lot of content changing within their view like Facebook and Instagram.
• Use a combination of HTML, JavaScript and CSS on the front-end to build all what a user interacts with and sees on a website.
• Write high performance mobile apps in JavaScript by taking advantage of React Native
• Have an extensive knowledge of Flux Design Pattern like Redux or Fluxor, jQuerry, Unit testing with Karma or Jest, JS tools like Grunt, Gulp and Bowe, AJAX and many more.
A good React.js Developer should have the knowledge of all the above tools and many more. It will be worth your while to get the best Developer with all the above qualities and with help from freelnace.com, this should not be a problem. Hire the best React.js from freelance.com but before you do, there are a few things to note.
What to note before hiring a React.js Developer
You do not just go out there and hire a React.js Developer before making sure you are hiring the right Developer for the right reasons. The things you should put into consideration before doing this are as follows
Make clear definition of your project
The first major step is defining your project. Lay out a detailed description of the job you have at hand. This will give a more accurate estimate of the project when it is time for the Developers to propose their terms.
Explain what you expect the Developer to do
Be very precise on what you expect the Developer to do. The possible things your project needs would be migration of an existing app to React.js or building a new app from scratch. You also need to be clear on whether the Developer will work alongside your team or he will do the work on his own.
Be clear on the skills you are looking for
State what skills you prefer the Developer to have and their years of experience, keeping in mind that the more experience and the more skilled they are, the more costly they are. It would be impractical to hire a senior Developer for a job so minor that a junior Developer can easily handle. Make sure you do not waste your money going for higher levels when you can easily hire a less expensive Developer.
State how long your project will take
Based on your project description, be very precise on the length you expect the project to take. Some web projects take longer than others do but it is for your benefit and that of your organization to estimate the deadline of the project. If possible, find out about this ahead of time so you can break the time into phases. This will prevent you from having any interruptions during the time the Developer is working on the project.
Seek help
In many cases, you might not have any idea on how to go about carrying out all the above tasks. Do not fret, as plenty of people can help you. Seek professional help from recruiters who know everything about React.js. Freelancer.com can set you up with an expert who can help you with defining your project and seeking the best Developer.
Write a job description
There is a difference between defining your project and writing a job description. You need a job description for the Developer and any other employees working on the project. If you are engaging a freelancer, what you need is a statement of work, the job post and any other document that describes the work you need done. The right candidate should submit a detailed proposal giving accurate time and cost estimates.
Your job description should include the following things
 Title of the project at hand
 Overview of the project
 Any deliveries like designs, source code and documentation needed
Below is how a sample project description should look like.
Sample Project Description
Check this sample to have an idea of how your project description should look like.
Description:
XYZ Company is looking for an experienced React.js Developer to help kick-start their new social media platform for tours and travel. The project, based on MongoDB, Express.js, React.js, and Node.js, is stack with React Native on the mobile end.
XYZ Company expects the right Developer to complete all the deliverables, and have unquestionable experience in the following areas:
 Extensive knowledge API Creation and RESTful services
 Familiarity with MongoDB, Express.js, React.js, and Node.js (MERN) Stack
 Knowledge of React Native, Geolocation and Geocaching
 Ability to translate designer mock-ups and wireframes into front-end codes
 Have a solid foundation in algorithms, data structures, and system design.
 Familiarity with database administration and management of a hosting environment
 Knowledge of version control with GitHub
 Have a strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model
 Knowledge of isomorphic React
 Have a thorough understanding of React.js and its core principles
 Familiarity with newer specifications of ECMAScript
 Have great experience with data structure libraries
 Be experienced with popular React.js workflows such as Flux or Redux
 Effective ability to carry out Unit testing with Jest
 Familiarity with RESTful APIs
 Knowledge of authorization mechanisms like JSON Web Token
 Have the ability to understand business requirements and translate them into technical requirements
 Knowledge of benchmarking and optimization
 Have great communication skills
 ((List education level or certification you require))
Hiring React.js Developer questionnaire
To help you further with hiring the right React.js Developer, below are a few screening questions to ask the candidates.
Question: What are higher-order components in React?
Answer:
Higher-order components are wrappers. They take an old argument out and return a new one. Mainly used to extend or modify the behavior of the contained component, the components change behavior without modifying the underlying class in React.js characterized by the decorator pattern.
The higher-order components build elements by use of composition. A model case to use would be abstracting pieces of code, which are common to multiple components:
Player.js
import React, {Component, PropTypes} from ‘React’;
export default class Player extends Component {
static propTypes = {
black: PropTypes.bool,
data: PropTypes.object,
styles: PropTypes.object
};
static defaultProps = {
black: false,
data: {
src: null,
caption: ”
},
styles: {}
};
render() {
const { black, data, styles } = this.props.data;
return (

{data.caption}

);
}
}
this component, which holds a Player while also containing a module markup is reused for other components. Let us abstract it, and allow for pass through of properties:
Player.js
import React, {Component, PropTypes} from ‘React’;
import ModuleContainer from ‘./ModuleContainer’;
export class PlayerInline extends Component {
static propTypes = {
data: PropTypes.object
};
static defaultProps = {
data: {
src: null,
caption: ”
}
};
render() {
const { src, caption } = this.props.data;
return (

{caption}

);
}
}
const Player = new ModuleContainer(Player);
export default Player;
ModuleContainer.js
import React, {Component, PropTypes} from ‘React’;
export default function ModuleContainer(Module) {
return class extends Component {
static propTypes = {
black: PropTypes.bool,
styles: PropTypes.object
};
render() {
const { black, styles } = this.props // eslint-disable-lint
return (

);
}
};
}
The previous way of instantiating Player, with no changes here is used. the inline player if we prefer and the module wrapper markup and props with other modules are also used.

The immediate answer to the design decision of moving away from mix-ins in React.js for ES6 is higher order components. Higher-order components pass for a clearer structure, and are easier to maintain for their hierarchical, whereas mix-ins have a bigger chance of conflicting due to a flat structure.
Question: Which components should rely on state, and why should they?
Answer:
Everything is a component in the React world. However, the components used to present data do not have to obtain data from an API. The convention is to have presentational (dumb) components stateless, and container components that rely on the state.
The convention itself is not strict as there is more than one type of state in React. Despite the varying opinions, utilizing local state in presentational and especially interactive components is an allowed principle.
There is also a big distinction between component classes and stateless function components. The latter does not have a state and is the official recommendation to use them when possible.
Question: What is JSX? How does it work, and why would it be used?
Answer:
JSX is syntactic for React JavaScript, which makes it easy to write components. This is because it has XML-like syntax. However, JSX is JavaScript and not HTML, and React transforms the JSX syntax to pure JavaScript. Example below
React.createElement(‘ul’, { className: ‘my-list’},
React.createElement(‘li’, { className: ‘list-element’},
React.createElement(‘a’, { className: ‘list_anchor’, href: ‘http://google.com’ }, ‘Toptal.com’),
React.createElement(‘span’, { className: ‘list-text’ }, ‘ Welcome to the network’)
),
React.createElement(‘div’, { className: ‘list-item-content’ },
React.createElement(‘li’, { className: ‘list-element’ },
React.createElement(SomeCustomElement, {data: elementData})
)
)
);
Versus:

Question: What is the application state in React, and what governs the state?
Answer:
Application state in React.js is an object that represents the current set of data and other properties of the application. It differs from the component local state by its reference from multiple components.
The other difference is the application state does not change directly and its update is only in a store. Stores govern application state, and define actions dispatched as results of user interactions.
Most React components do not depend on the application scope. It is likely the presentational components have access to pieces of data, but only if that data provided to them is via properties. In React, the convention is to have only the container elements dispatching actions and referring to the application scope.
Conclusion
React.js is a high performing app that aligns all the business projects of an organization putting them in good positions. The React.js library is very popular with a very vibrant community using it. Using React.js requires the inclusion of other tools to deliver complete apps and sometimes, it may call for a more general technology upgrade.
Web development is evolving at a very high rate globally and new tools are gaining popularity every day. This innovation requires a great deal of application structure and excellent system architecture. The need for experienced open-minded front-end Developers is on the rise to build reliable software and to optimize this process.
Has this article been of any help to you? Kindly give us a feedback of your thoughts and give any suggestions you may want to add to the above article. We will appreciate whatever suggestion or comment you have. Leave all your comments in the comment box below and we will get back to you. Do not forget to share this article.
To wrap up, this article gives you a guideline on how to hire the best React.js Developer. You can get every other information you need from Toptal engineers who are team leaders in the world of technology today.

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Comparison Between Tap and Bottled Water

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Comparison Between Tap and Bottled Water

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Comparison Between Tap and Bottled Water

Recent incidents in the United States and around the world have raised questions about the safety of the water we drink. Traditionally, people used to drink tap water, but recent incidences like the 2014 lead contamination in the municipal water supply in Flint, MI, have raised concerns about the safety of tap water. Consequently, many people have turned to bottled water.  On the other hand, environmentalists have raised concerns about the environmental impact of empty water bottles and also the safety of bottled water (Karlstrom & Dell’Amore, 2010). Therefore, each of the two sources of drinking water has its own advantages and disadvantages.

Compared to bottled water, tap water is advantageous for a number of reasons. To start with, tap water is cheap because it does not require packaging and is mainly distributed using pipes. Secondly, tap water does not pose a threat to the environment because it is not packaged in plastic bottles. On the other hand, bottled water is advantageous because it is convenient mostly to people who are traveling or when public water systems have been compromised by disasters like tornados, hurricanes, earthquakes, and floods among others.

Both tap and bottled water have environmental drawbacks and advantages. To begin with, empty water bottles can take over 1,000 years to biodegrade, therefore causing environmental pollution. Also, transporting bottled water and maintaining it cold involves burning fossil fuels which emit greenhouse gases into the air, therefore contributing to global warming. Moreover, there is a lot of water wastage from the catchment, bottling, and delivery to the end consumer. On its part, the main disadvantage of piped water is that there is the risk of contamination from delivery systems like lead pipes.

The first point that I see as scientifically unbiased is that bottled water is not necessarily secure than tap water. According to a study carried by the Environmental Working Group, bottled water sometimes contains harmful industrial chemicals (Karlstrom & Dell’Amore, 2010). Secondly, the plastic bottles used to package water contain polyethylene terephthalate, and if recycled, as they usually are, they can produce toxic chemical like benzyl butyl phthalate which are harmful to humans. The one argument that I find biased is that the solution to health and environmental concerns associated with bottled water is banning its sale.

Reference

Karlstrom, Solvie & Dell’Amore, C. (2010, March 13) Why tap water is better than bottled water. National Geographic. Retrieved from http://news.nationalgeographic.com/news/2010/03/100310/why-tap-water-is-better/

Examination of Two Fallacies

A fallacy is the use of faulty or invalid reasoning while constructing an argument. An argument that is fallacious may be deceptive in the sense that it seems to be better than it actually is. Whereas some fallacies are developed intentionally to persuade or manipulate through the use of deception, others are unintentional as a result of ignorance or carelessness. On that account the following paper will examine two fallacies in recent publications. These fallacies lie in the disciplines of philosophy and economics. The first fallacy states that the leadership of a country should experts, that is, people who possess broad philosophical knowledge. The second fallacy asserts that technology is the primary cause of unemployment in the 21st century.

The First Fallacy

On 26 March, 2017, The Guardian published an article titled Nigeria in Need of Demosthenes, written by Simon Abah. The author states that Nigeria is facing a leadership problem due to the lack of ideological education. Abah (1) believes the lack of “thought leadership” is the casue of many problems that Nigeria is experiencing.  He bases argument on Plato’s idea in The Republic. Plato proposes the idea of philosophical rule whereby kings should be philosophers to enable a country to be prosperous. This section of the essay will illustrate why Abah’s and Plato’s argument is a fallacy.

 

 

The Writer’s Motive and Intention

In The Republic, Plato systematically questions human behaviour with a particular focus on the government and justice system. Plato states that philosophers should be kings since they have the ideal level of knowledge required to rule a state (Plato 5). Abah (1) forms his reasoning along this line when he states that it would be great if a state could be ruled by knowledge rather than power. The author’s motive was to show that power corrupts individuals and thus should not be the basis of leadership. His intention was to show that an ideal leader should have broad knowledge of social structures and policy. This is the flaw of Plato’s and Abah’s perspective that this paper will discuss.

The Fallacy’s Importance to the Argument

Plato addresses the issue of justice by stating his depiction of the ideal state. He believes that such a state should made up of an autonomous government. In such a state there should be a clear association between the structure of the state and the desire for justice. Plato argues that philosophers should be kings since they are focused on discovering the ideal state. He brings forward the idea of a “kallipolis” (beautiful city); he terms it as a “just place” where political rule is centred on knowledge which is in the domain of the philosopher kings (Plato 76). Plato’s definition of democracy is crucial in understanding the argument that philosophers should be the rulers. He defines democracy as ‘’the rule by the demos’’ (Plato 77). Demos refers to people who are unfit to rule. Plato’s argument is against the ideology of democracy. States in the contemporary world are democratic, that is, people have a say in the affairs of the state. Debate of what constitutes a democracy has been ongoing since Plato’s era; the major ideologies are that of majority rule and protection of minorities (the Madisonian view). To Plato, democracy means rule by people who are unfit to do so(Plato). Since political decisions require skill and judgement, Plato believes that ruling should be done by experts rather than the people who are chosen by the majority.

He emphasizes his point by using the allegory of the ship which is navigated by men who have no knowledge of the “craft of navigation” (Plato, 204). Plato used this allegory to demonstrate that expertise is key in leadership. By using the allegory of the ship, Plato not only stresses that specialization is important when governing a state. The ship in the allegory embodies the state while the sailors and captains represent the ordinary people and their non-skilled leaders respectively. In this argument, Plato illustrates the downside of equality and liberty, and the uneven nature of democracy. Plato’s perspective is aligned to his definition of democracy, that is, rule by people who are unfit to do so. His argument is relevant in the sense that he illustrates that the philosophers possess the “capacity to grasp the eternal and immutable” (Plato, 204), while the ordinary man cannot rule since they have “no true knowledge of reality, and no clear standard of perfection in their mind to which they can turn” (Plato, 204-205). However, his argument is not realistic in the contemporary world. Therefore, it is strange that Abah structures uses Plato’s ideology as the basis of his argument

The Probable Effect of the Fallacy

Abah’s argument is not valid because nations in the contemporary world insist that the modern democracy is a government that is formed by the people, for the people. His suggestion brings forward the idea of dictatorship whereby power is concentrated among a few elite people.  Due to the terrible experiences of dictatorship, many states have become advocates of the representative model of government, whereby citizens choose who represent them at the state level, and are also practising pluralism. Therefore, the modern ideology of the state depicts it as neutral and public arena where the concerned parties gather to debate policies that are centred on economic affairs. Plato’s perspective of the state is a body that is in the control of the philosopher who should determine what best suits the majority. In the ideal state, the concerned parties should possess the knowledge required to usher in political change, however, it’s hard to quantify and determine the knowledge that is required to facilitate this change. A person who is a philosopher and has knowledge on political philosophy, metaphysics, and the ethics of logic, is not necessarily an expert on determining the interests of the majority. Even if this philosopher understands the nature of goodwill, he cannot determine what is good for everyone since human beings have different wants and degrees of satisfaction.

In his argument, Abah is clearly not interested with the representative model of government that is required these days. Democracy is the most effective way of ensuring that even the most marginalized person gets a say in the affairs of the state. Plato’s idea of expert rule is not appropriate since it’s hard to ensure that each individually is well represented. Democracy works because people get to vote for the person whose ideology suits their needs.

Another reason that renders Abah’s argument invalid is the fact that he is advocating for compassionate dictatorship. In such a rule, the elite takes actions without consulting the people who are affected by the decisions.  Philosopher’s may possess vast knowledge, however, one cannot determine the needs of a person without asking him/her. This is why citizens in the modern world are striving for a greater say in the affairs of the government. Hence, Plato’s argument is wrong because a few individuals cannot determine the needs of the majority.

Overall, even though Abah’s proposal that knowledgeable people who possess the ability to bring justice and happiness in a state is ideal, it is very unrealistic and unachievable. Rule by a few people brings about dictatorship. In his argument, Abah is not only asking his audience to disregard the political process, but also abandon our rights and opinions whenever we encounter a compassionate dictator. Due to this reasons, his ideology is not only unrealistic but unattainable in the modern world.

The Second Fallacy

The article The Long-Term Jobs Killer Is Not China. It’s Automation by Claire Cain Miller, published on December 21, 2016, states that technology (automation) is the main cause of employment in the modern world. Miller (1) bases her argument on employment statistics from different time periods and utilizes the opinions of left wing economists. The following section will examine why Miller’s argument is a fallacy.

The Writer’s Motive and Intention

Miller’s intention of writing the article was to illustrate that even though technology is useful, it has some significant drawbacks. The greatest drawback of technology is felt in the manufacturing sector where automation has led to massive job losses. The author’s intention was to show that globalization is not the main cause of unemployment in the United States.

The Fallacy’s Importance to the Argument

Automation of business processes has enabled organizations to enhance efficiency and overall quality of products and services. As a result, firms are able to realize greater profit margins. Miller (1), however, believes automation has come at the cost of human labor since machines eliminate the need to have workers especially for repetitive processes. She states that automation is the primary factor that causes unemployment in the United States. The Bureau of Labor Statistics (BLS) started formal collection of employment statistics in 1940; however, the data stretches as far back as World War 1 when unemployment levels were at 1%. During the period of the great depression, unemployment hit 25% which is the highest ever recorded. The largest recorded ever since was 10.8% in 1982 and 10.0% in 2009. From 1948 to 2015 the averageunemployment rate has been 5.8. In 2015 the rate of unemployed Americans was at 5%. Miller (1) believes unemployment levels tend to rise during times of innovation and recession. However, it should be noted that the accurate comparison of unemployment figures between that period and today is not possible due to the different measures applied. For instance, the modern definition of unemployment is a person who is willing to work but unable but to find a job while in the 1930s citizens who were in the public works program were counted as unemployed(Miller and Aktkinson, 55).

Theories of unemployment stretch back to the classical era and are based on the Keynesian ideology. The classical theory states that unemployment is an indication that labor is being obstructed by certain factors. As such, it has led to the development of other ideologies which try to explain the factors causing unemployment. Technological unemployment states that job losses are caused by changes on technology while the natural rate of unemployment states that there will always be people lacking jobs due to inefficiencies in the labor market. On the other hand, the Luddite Fallacy is concerned with the long term impact of technology on unemployment. To justify her argument, Miller (1) forms her reasoning from these theories. She disregards the fact that there are other factors that affect unemployment such as economic decline and inflation. In fact, the Federal Reserve serves two main purposes which are reduction of unemployment while maintaining a steady inflation rate. Also factors such as relocation and entry of new firms and seasonal fluctuations affect the rate of unemployment(Miller and Aktkinson 78).

The Probable Effect of the Fallacy

Miller’s argument is biased and wrong since it does consider the benefits of adoption, which are far greater. The primary goal of process technologies is to improve the productivity of workers since it eliminates repetitive tasks thus freeing up employees to perform important functions that enable a firm to achieve its goals(Miller and Aktkinson 122). For example, automation of records in hospitals has enabled doctors to treat patients more effectively since the medical history is available at the click of a button. Automation are high variable cost projects since the expenses related to such projects depend on various factors such as scale and demands of an organization. Therefore, they are more suited for stable operating environments which are predictable, even though it is rare to find an operating manager in a stable environment since the business world is ever-changing. It means that operating managers should select productivity improvement projects that fit the demands of an organization.

The capitalist system of economy provides economic freedom where markets are subjected to the natural laws of demand and supply. Therefore, the capitalist system enables creation of employment since more opportunities are brought about by economic growth. The broken window fallacy is a parable developed by Frederic Bastiat where he used a broken window to express why destruction is harmful to an economy. Destructions such as unemployment have a negative effect on any economy. Technology does not create unemployment in the long run because it brings with it new opportunities. These technologies need to be built and maintained which gives rise to new jobs. Furthermore, firms providing technological solutions also need workers to run the various departments. The role of managers in the productivity-unemployment relationship is to ensure that automation of processes reduce the burden on employees so that they are able to take on more productive work. Overall, even though Miller attempts to vilify automation, she manages to do the opposite by highlighting its aspects.

 

Works Cited

Abah, Simon. Nigeria in Need of Demosthenes. The Guardian, 2017.

Miller, Ben and Robert Aktkinson. “Are Robots Taking Our Jobs, or Making Them?” 2013.

Miller, Claire Cain. The Long-Term Jobs Killer Is Not China. It’s Automation. The New York Times, 2016.

Plato. The Republic. New York: First Avenue Editions, 2015.

 

 

 

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