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UI Developer Interview Questions

Last Updated on:

23 November 2022
UI Developer Interview Questions

Are you an aspiring UI developer about to take an interview? Or are you simply someone who's researching? Regardless, you have come to the right place, as here I'll give you a sneak peek into the world of a UI developer and things like UI developer interview questions, responsibilities, and much more! So let's begin!

What is a UI?

UI or User Interface is the graphical part of any website, device screen, or app that users interact with for various purposes. UI developers are those who make this user interface with inclusive and intuitive interaction elements and layouts. 

When we access any website or app, the first thing we see is a graphical interface which is the user interface of that specific app or website. UI developers create user interfaces with different layouts and elements to navigate us and give us a unique experience of using that website or app.

The experience of browsing a website or using any app goes to another level with only a visually pleasing interface. A good interface can attract a user in many ways, as it can erase putting extra effort into browsing a website or app. Also, a good interface can help you clearly understand what will happen if you click a button or flip a toggle switch. UI designers help to guide a user by using visual cues in the user interface section. 

What Does a UI Developer Do?

The goal of a UI developer, or sometimes "dev," is to produce user-friendly, intuitive software that bridges the gap between humans and computers. Professionals in this field aim to enhance the user experience by designing functional, engaging, and simple software interactions and web content. 

There are UI developers in almost any industry where a complicated technical system must interact with a user. As a programmer in this role, you'll need to have excellent design abilities and pay close attention to how the program keeps the user involved while providing a rewarding experience. Early adopters of new technologies, such as UI developers, often employ agile management.

They are mainly responsible for creating the user interface of a website or app. They not only make a user-friendly interface but also design and edit the interface if changes are needed. A UI developer's main job is to facilitate users’ satisfactory website browsing experience with no issues or errors. 

In addition, they work on creating or optimizing a system, testing and troubleshooting, and resolving browser compatibility and accessibility issues. Also, a UI developer helps the user interact with the back-end programs of a website and create a platform where they can have a real-world experience. 

Responsibilities and Duties of a UI Developer

A UI developer’s main task is to provide a digital product design and show users how to interact with it via the website. Therefore, this job includes a few duties and responsibilities as a UI developer. These responsibilities are: 

  • Design layouts and proper spacing for page elements.
  • Edit or upgrade the existing design platform.
  • Create an adaptive design that can run from any device.
  • Writing and debugging code.
  • Properly handle and help visualize interactive elements.
  • Adequate selection of color palettes, fronts, and patterns.
  • Create a unique style guide that can help with a brand’s identity.  
  • Help the team visualize the user requirements and the end product by using visual aids and proper planning and designs.
  • Communicate with developers to ensure that features are correctly implemented. 
  • Analyze design impacts and changes in usability. 
  • Utilize APIs and integrate social media.
  • Create apps that are compatible across different devices and are responsive.
  • Participate in meetings with the development and design teams.

Basic Skills Needed for a UI Developer Job

As a UI designer, you must be creative with designing a digital environment. You must also be technically skilled at translating your ideas into visual elements. Besides, there are a few more skills that a UI developer must have: 

Skills of UI Developer (Must Have) 

They are as follows:

  • Mastery of front-end development languages. For instance: CSS, HTML, JS, etc.
  • Ability to use graphic designing and editing apps such as Adobe Creative Suite.
  • Able to use CMS or content management systems. For instance: WordPress.
  • Written and verbal communication.
  • Creating interactive and responsive UI elements.
  • Exceptional planning and brainstorming ability to present ideas and use visual aids such as flowcharts and wireframes to make detailed plans.
  • SEO skills and being capable of creating SEO websites and user interfaces.
  • Have in-depth knowledge of JSON, Java, SQL database, Jquery, etc.

Most important of all, they need to have a portfolio. A portfolio is a collection and compilation of all the projects they have done and were a part of. All are neatly organized on a particular website or even a blog. A portfolio is often the deciding factor between applicants. Recruiters always choose applicants with a well-organized and "heavy" portfolio over applicants with no or "lighter" portfolios.

Educational Qualification

To land a job as a UI Developer, recruiters look for applicants with a Bachelor’s degree or Master’s degree in Computer Science or relevant fields such as Web Development, Software Engineering, Graphic Designing, etc.

Common Questions Asked in the Interview for a UI Developer Job

There are enormous opportunities for building a career as an IT professional in the IT sector, as demand is very high. UI developers take advantage of this high-rising demand in the IT market. However, you have to make sure you are prepared before joining as a UI developer in any industry. For this reason, here are some job interview questions which are frequently asked for any UI developer job. 

Preparation for these questions you will most likely get during a job interview will give you an advantage. However, you have to impress the interviewer with your knowledge and skills. Apart from that, you must ensure the interviewer that you are a whole package for the UI developer position in his company. 

Question#1: What precisely is the role of a UI developer? 

(The proper way to answer this is to describe a user interface and the connection between the user interface and the UI developer.) 

Sample Answer: The role of a UI developer is to modify the user interface so that the user can easily interact with the interface while browsing from any device, like a PC, mobile, or anything. UI developers make the user interface exciting and convenient, which helps to meet a user’s needs. 

Question#2: What are the essential skills that a UI developer needs? 

(This question is asked to check your skills as a UI developer. An interviewer will look for the skills you have with this question. So you have to mention the skills you have to work as a UI developer in their company.)

Sample Answer: As a UI developer, visual design skill is a must. Graphic design skills include animation designing and designing interactive elements for the user interface. A UI developer must be skilled in prototyping, copywriting, SEO, site analytics, and front-end frameworks. UI developers must know HTML and CSS to create the user interface. 

Question#3: Explain the difference between and tags.

(This question refers to the basic knowledge of any UI developer who knows about the tags. By asking this question, an interviewer will check your basic understanding of UI and how efficiently you can work for their company.) 

Sample Answer: tag is used for bold text in an interface, and tag is used for creating substantial importance to the reader regarding search results.

Question#4: Does HTML require a compiler? 

Sample Answer: HTML does not require a compiler as it is a front-end language. Rather than that, languages like Java, C++, and C need a compiler to convert the code into a language.

Question#5: Explain the advantages of JavaScript.

Sample Answer: A JavaScipt server can quickly validate user input before the page is sent off to the server. Also, JavaScript helps to respond to any feedback from a user immediately. 

A user doesn’t need to wait for the reloading page to give further input. Moreover, JavaScript increases interactivity with the user by creating manual interfaces by keyboard or cursor.

Some Additional Questions: 

Question#6: What can increase page performance?

  • Small size image
  • Clearing cache
  • Exeter HTTP request reduction
  • Reducing unnecessary widgets

Question#7: What are the effects methods used in JQuery?

  • show() : Displays selected elements.
  • hide() : Hides selected elements.
  • toggle() : it toggles between show() and hide().

Question#8: How do you optimize a website’s assets? 

  • Concentrating files
  • Compressing files
  • CDN Hosting
  • Offloading assets

Question#9: What is a responsive website?

Responsive websites fit into any display size, like a mobile device, laptop, or PC.

developers planning on a white board

Career Path of a UI Developer

The career path of a UI developer goes as follows:

1. Internship

Gaining an internship is a frequent way to enter the world of interface design. Candidates for the role of UI developer should be capable of demonstrating their expertise in the hiring process through a combination of a strong portfolio and a well-drafted cover letter that highlights their relevant experience and skills. 

Interns in UI design should be versatile and able to create a number of different UI resources and processes. Interns in UI design are expected to produce work that adheres to the company's style guide and visual design vocabulary. By creating mocks and interaction processes, you may also test and enhance the goods' usability.

2. Junior or Entry-level UI Developer

Junior UI developers operate directly under the direction of senior and intermediate designers. The team members also have the opportunity to formulate their own ideas with the help of more seasoned team members. 

A Junior UI developer will collaborate with clients to develop solutions that satisfy their needs and deliver precise specs and plans for projects. Moreover, they need to be able to provide quick and practical answers.

3. Executive or Mid-level UI Developer

Developers at the midpoint of their careers in user interface development are expected to have mastered a wide range of UI disciplines. The vendor's products and concepts must be aligned with the design decisions made by those in the UI developer's career trajectory. 

The mid-level designer not only needs to be able to interact with vendors but also to effectively communicate ideas and justify their conclusions. Designers at the intermediate level are tasked with a wide range of responsibilities, including work in design aesthetics, interactive design, and research.

4. Senior UI Developer

A senior UI developer works closely with the lead developer to execute projects and manage lower- and middle-level designers and interns. Those who choose to pursue a career as a UI developer should also be able to effectively communicate with clients and other stakeholders, as well as keep up with industry developments.

5. UI Developer Lead

The lead UI developer will be responsible for a variety of activities, such as overseeing the creation of new projects and training junior designers, before being elevated to a position in the company's upper design management. 

In addition to ensuring that projects are finished on time, they are tasked with recruiting and supervising entire teams. As a bonus, the ideal applicant will be a proficient communicator and manager of the full UI design process, thanks to their UI developer expertise.

Salary Range of UI Developers

UI developers can make anywhere between 80k-140k USD yearly, depending on their expertise, niche, and location.

The Future of UI Developers

Front-end developers have a bright future. Recent estimates forecast a one million developer shortfall in the U.S. Other research suggests the rest of the world will fare worse.

The BLS predicts a 15% rise in web developer jobs between 2016 and 2026. This rate is much higher than average.

More people accessing the internet, especially on mobile devices, will raise demand for user interfaces and front-end engineers. Since internet use closely correlates to web developer success, this industry has a bright future. You needn't look further for work.


Josh Evan

Written by:

Josh Evan

Josh Evan is the professional career counselor and career development writer at When Work Works. He loves to see people from this field succeed through initiating the right thing in the right way. He never tells; he shows the way. We appointed John not because of his impressive CV. It was his counseling charisma which stood out of everything. He can implant idea, confidence and productive thoughts into mind almost effortlessly. His pen and mouth both speak for the greater good.


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