Introduction

Express.js is a web application framework for Node.js. It is used for development at the back-end. Express.js is open-source software for free use by any user on the internet. It has a fast speed. Express.js is minimalist and unopinionated. It has several strong features for web applications as well as mobile applications. Express.js has Middleware and a myriad of HTTP utilities. This makes the creation of a robust API very simple and quick. Express.js is known to provide a thin layer of web application features and secure the Node.js features. Express.js is available through the npm registry of Node.js. To install Express.js on your device, you need to initially install Node.js. Express.js provides small and robust tools for HTTP servers. It is one of the best solutions for single page web applications. Express.js is also used for websites, public HTTP APIs, and hybrids. Express.js is very flexible when it comes to an engine. It lets you choose between 14 permitted template engines. This makes developing the framework very quicker. Several popular frameworks are based on Express.js. Express.js has several famous users, including PayPal, IBM, Uber, and Fox Sports.

Learn more about Express.js

Express.js is developed by T. J. Holowaychuk. The first version of Express.js was released on 16th November 2010. It was inspired by Sinatra. Several updated versions were released following the first release. The latest version of Express.js, i.e., version 4.17.1 was released on 25th May 2019. Express.js has been written in JavaScript. It operates on a Node.js platform. Express.js is licensed by MIT. Express.js is given the honor of being the de facto standard server framework for Node.js. Express.js is an essential and assertive web framework. It has a robust API that can make routing easier. Express.js focuses on increasing the performance of its applications. It is known to have super-high test coverage. Express.js has many HTTP helpers such as redirection, caching, etc. The view system of Express.js supporting more than 14 template engines makes the developers' job easier and creative. It gives a lot of room for customized development. Express.js has content negotiation features as well. It is very easily executable for generating applications quickly. This framework has an MVC-like structure. It is asynchronous and single-threaded.

Important features of Express.js

• Cookies Management

All the cookies sent to clients can be sent to the Node.js or Express.js server. This helps in the management of cookies. By doing this, you can find all the cookies at a single location.

• Serving Static Files

Express.js has an assigned built-in Middleware to serve the static files. The static files can be in images, CSS, JavaScript, etc. The dedicated Middleware for Express.js is Express.js.static. Sending the name of your directory to Express.js.static will automatically serve your static files.

• Basic Routing

Routing is when the response of the application using Excess is recorded when a client request is put in. Routing is done until the response reaches a particular endpoint. The endpoint can be a URI and a specific HTTP request method.

• Request & Response object

Express.js makes use of a callback function. This function has two main parameters, viz. request object and response object. The request object is a representation of HTTP requests. And the response object is a representation of HTTP responses.

Roles and responsibilities of an Express.js developer

• To manage the interchange of data between the server and the users
• To test the developed services
• To operate the developed services
• To write readable and reusable codes
• To be an analytical problem solver
• To contribute to organizational improvements in process and infrastructure
• To follow best coding practices
• To effectively use tools and ingenuity to identify and fix defects before they become a problem
• To build customer-facing UI and back-end services for payment processing administration and management
• To have strong Node.js and Express.js knowledge
• To have passion for teamwork
• To be innovative
• To work as part of a team that is developing applications and services using Agile development methods

Skills Required

• To have hands-on experience with HTML, CSS, and AJAX
• To have development experience of designing object-oriented JavaScript and SVG
• To be familiar with the whole web stack
• To have a problem-solving aptitude
• To pay attention to details
• To have previous working experience as a Node.js or Express.js Developer
• To have in-depth knowledge of Express.js
• To understand protocols and web server optimization techniques
  

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Salary structure of an Express.js developer

An Express.js developer is in a prominent position in the Information Technology (IT) world. Express.js developers have demanded not only in the Information Technology (IT) industry but also in several other industries, including and not limited to finance, transportation and tourism. An average annual salary of an Express.js developer is US $88,838 in the United States. In India, the average is very low at US $7,908.99 (₹ 589,121). India based Express.js developers annually earn US $2,872.96 (₹ 214,000) to US $14,109.75 (₹ 1,051,000). Some countries offer excellent salary packages to their Express.js developers. This largely depends on the demand for Express.js developers in that region. In Germany, an Express.js developer is offered, on average, US $69,545.71 (€ 58,555) annually. While in the United States, the national average salary is US $55,662.79 (£ 40,038). Depending on the years of experience in the market. Express.js developers in the United Kingdom earn US $53,093.61 (£ 38,190) to US $58,404.36 (£ 42,010) per year.

Freelancing and Contractual basis work

Freelance Express.js developers and contractual Express.js developers are outsourced by the companies, industries, firms, institutes that do not want to hire full-time personnel. Freelance and contractual projects are offered by such companies, industries, firms, and institutes which are a one-time thing. Everyone wants a skilled and talented Express.js developer. Companies seek out talent by putting out advertisements in newspapers, social media, and freelancing platforms. Individuals looking for opportunities are advised to keep tabs on such platforms in your niche. Freelancing platforms are the best way to find freelance gigs and contracts. Upwork, Freelancer, People Per Hour, Indeed, LinkedIn are some of the widely used freelancing and connecting platforms globally. Freelancers publish their skills, experience, charges, and portfolio on the platforms. Often freelancers reach out to potential clients and vice versa.

Express.js Certification

Companies are always looking for certified individuals to join their teams. Certified Express.js developers are known to give out high quality work. That is why companies most commonly seek only certified Express.js developers. Certified Express.js developers established their credibility in the market. Several websites offer certification courses and examinations to interested and talented individuals in Express.js. These certification courses run for a few months. You are required to go through the tutorials very thoroughly. Solving assignment is a major part of any Express.js certification course. Some courses even assign mini projects or projects at the end of the course to test the learner's ability to apply the acquired knowledge practically.

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