HTML5

Hire the Top 3% of Freelance HTML5 Developers

Toptal is a marketplace for the best HTML5 developers, engineers, programmers, coders, architects, and consultants. Top companies and start-ups choose Toptal HTML5 freelancers for their mission-critical software projects.

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Clients Rate Toptal HTML5 Developers4.3 / 5.0on average across 804 reviews as of Jul 12, 2020

Hire Freelance HTML5 Developers and Engineers

Boris Yordanov

Freelance HTML5 Developer

United StatesToptal Member Since July 4, 2017

Boris is a full-time web developer who works mainly with vanilla JavaScript and with the most popular JavaScript frameworks like Angular, React, and Meteor. He made his first website when he was 14, and since then, has made more than 400 WordPress sites during his freelancing career. Nowadays, he designs and builds custom web applications and sites.

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Alejandro Hernandez

Freelance HTML5 Developer

ArgentinaToptal Member Since August 30, 2012

Alejandro got his bachelor's degree in software engineering in 2005 and has since been working for software companies of all sizes from all around the globe as a freelancer. Currently, he enjoys working as a full-stack architect in JavaScript projects, where his experience and his deep understanding of architecture and theory are most impactful.

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Patrick Keenum

Freelance HTML5 Developer

United StatesToptal Member Since June 11, 2018

Patrick is a senior full-stack engineer with more than 10 years of experience developing beautiful, reliable, and scalable products. He is passionate about bringing ideas from conception to launch, working with clients of all levels of technical acumen, and building products that help companies grow.

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Cheryl Hoskins

Freelance HTML5 Developer

United StatesToptal Member Since December 31, 2015

Cheryl is a developer with strong communication skills who seeks to provide software solutions that delight her clients. She has enjoyed working with React, Node.js, REST APIs, GraphQL, SQL, MongoDB, and JavaScript recently and is ready to start putting her skills to work for you. In addition to her technical background, Cheryl has an MBA and can translate your business requirements into quality software solutions.

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Rizwan Rizvi

Freelance HTML5 Developer

United StatesToptal Member Since May 21, 2018

Rizwan has a reputation for overcoming complex challenges through clear thinking, innovative approaches, and enhancing the communication between different parts of organizations. Throughout his career, he has optimized the efforts of diverse and dispersed teams of IT professionals and consistently has delivered projects profitably in challenging environments.

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Nick Kuhn

Freelance HTML5 Developer

United StatesToptal Member Since February 20, 2017

Nick has over a decade of Drupal experience and has built some of the largest and most recognized Drupal websites such as Fox.com and AmericanIdol.com. With a very wide skillset, he fits in perfectly with any sized team, and in any role. He has worked with Acquia and developed several of the best practices the community uses today. With over 50 projects under his belt, he has the real-life experience needed to make applications successful.

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Dustin Cass

Freelance HTML5 Developer

United StatesToptal Member Since September 1, 2018

Dustin has been a professional front-end engineer for over ten years and has worked at companies and agencies large and small. He's passionate and dedicated to his craft, and he always goes the extra mile for his employers and clients.

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Trevor Wagner

Freelance HTML5 Developer

United StatesToptal Member Since May 25, 2016

Trevor is a hybrid full LAMP stack developer/front-end developer with over seven years of experience creating custom WordPress themes and plugins, and tailoring WordPress admins on a per-client basis.

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Charles Cook, Ph.D.

Freelance HTML5 Developer

United StatesToptal Member Since May 30, 2014

Charles has a Ph.D. in aerospace engineering and spent three years developing custom data processing and analysis programs for NASA. He specializes in scalable, enterprise-level application development and engineering solutions for exceptionally high throughputs. He is also the founder and owner of GreatVocab.com, for which he developed the core system using novel concepts in data analysis and control theory.

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Bryce Ott

Freelance HTML5 Developer

United StatesToptal Member Since April 17, 2014

With more than a decade and a half working as an engineer, architect, director, vice president, and CTO, Bryce brings a deep understanding of enterprise software, management, and technical strategy to any project. His specialties include Amazon Web Services, real-time systems, business intelligence, big data, enterprise web apps, scalability, education, and open-source software.

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A Hiring Guide

Guide to Hiring a Great HTML5 Developer

In today’s technology setting, HTML5 has become an integral part of front-end development. Although it is not a programming language, it is still an essential component of today's web applications. This guide offers a sampling of effective questions to help evaluate the breadth and depth of a candidate's mastery of HTML5 foundations and their understanding of HTML5 specifications.

Read Hiring Guide

HTML5 Hiring Resources

More Resources to Hire HTML5 Developers

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Interview Questions

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Testimonials

Tripcents wouldn't exist without Toptal. Toptal Projects enabled us to rapidly develop our foundation with a product manager, lead developer, and senior designer. In just over 60 days we went from concept to Alpha. The speed, knowledge, expertise, and flexibility is second to none. The Toptal team were as part of tripcents as any in-house team member of tripcents. They contributed and took ownership of the development just like everyone else. We will continue to use Toptal. As a start up, they are our secret weapon.

Brantley Pace, CEO & Co-Founder

Tripcents

In addition to sharp technical skills, Faruk had a great attitude and is a really exceptional communicator. He always let us know where he was with his work, thoroughly and reliably. That's not always the case, and it made working remotely considerably easier. He was an easy integration into the team.

Leif Abraham, Co-Founder

AND CO Ventures Inc

I am more than pleased with our experience with Toptal. The professional I got to work with was on the phone with me within a couple of hours. I knew after discussing my project with him that he was the candidate I wanted. I hired him immediately and he wasted no time in getting to my project, even going the extra mile by adding some great design elements that enhanced our overall look.

Paul Fenley, Director

K Dunn & Associates

The developers I was paired with were incredible -- smart, driven, and responsive. It used to be hard to find quality engineers and consultants. Now it isn't.

Ryan Rockefeller, CEO

Radeeus

Toptal understood our project needs immediately. We were matched with an exceptional freelancer from Argentina who, from Day 1, immersed himself in our industry, blended seamlessly with our team, understood our vision, and produced top-notch results. Toptal makes connecting with superior developers and programmers very easy.

Jason Kulik, Co-Founder

ProHatch

As a small company with limited resources we can't afford to make expensive mistakes. Toptal provided us with an experienced programmer who was able to hit the ground running and begin contributing immediately. It has been a great experience and one we'd repeat again in a heartbeat.

Stuart Pocknee , Principal

Site Specific Software Solutions

We used Toptal to hire a developer with extensive Amazon Web Services experience. We interviewed four candidates, one of which turned out to be a great fit for our requirements. The process was quick and effective.

Abner Guzmán Rivera, CTO and Chief Scientist

Photo Kharma

Sergio was an awesome developer to work with. Top notch, responsive, and got the work done efficiently.

Dennis Baldwin, Chief Technologist and Co-Founder

PriceBlink

Working with Marcin is a joy. He is competent, professional, flexible, and extremely quick to understand what is required and how to implement it.

André Fischer, CTO

POSTIFY

We needed a expert engineer who could start on our project immediately. Simanas exceeded our expectations with his work. Not having to interview and chase down an expert developer was an excellent time-saver and made everyone feel more comfortable with our choice to switch platforms to utilize a more robust language. Toptal made the process easy and convenient. Toptal is now the first place we look for expert-level help.

Derek Minor, Senior VP of Web Development

Networld Media Group

Toptal's developers and architects have been both very professional and easy to work with. The solution they produced was fairly priced and top quality, reducing our time to launch. Thanks again, Toptal.

Jeremy Wessels, CEO

Kognosi

We had a great experience with Toptal. They paired us with the perfect developer for our application and made the process very easy. It was also easy to extend beyond the initial time frame, and we were able to keep the same contractor throughout our project. We definitely recommend Toptal for finding high quality talent quickly and seamlessly.

Ryan Morrissey, CTO

Applied Business Technologies, LLC

I'm incredibly impressed with Toptal. Our developer communicates with me every day, and is a very powerful coder. He's a true professional and his work is just excellent. 5 stars for Toptal.

Pietro Casoar, CEO

Ronin Play Pty Ltd

Working with Toptal has been a great experience. Prior to using them, I had spent quite some time interviewing other freelancers and wasn't finding what I needed. After engaging with Toptal, they matched me up with the perfect developer in a matter of days. The developer I'm working with not only delivers quality code, but he also makes suggestions on things that I hadn't thought of. It's clear to me that Amaury knows what he is doing. Highly recommended!

George Cheng, CEO

Bulavard, Inc.

As a Toptal qualified front-end developer, I also run my own consulting practice. When clients come to me for help filling key roles on their team, Toptal is the only place I feel comfortable recommending. Toptal's entire candidate pool is the best of the best. Toptal is the best value for money I've found in nearly half a decade of professional online work.

Ethan Brooks, CTO

Langlotz Patent & Trademark Works, Inc.

In Higgle's early days, we needed the best-in-class developers, at affordable rates, in a timely fashion. Toptal delivered!

Lara Aldag, CEO

Higgle

Toptal makes finding a candidate extremely easy and gives you peace-of-mind that they have the skills to deliver. I would definitely recommend their services to anyone looking for highly-skilled developers.

Michael Gluckman, Data Manager

Mxit

Toptal’s ability to rapidly match our project with the best developers was just superb. The developers have become part of our team, and I’m amazed at the level of professional commitment each of them has demonstrated. For those looking to work remotely with the best engineers, look no further than Toptal.

Laurent Alis, Founder

Livepress

Toptal makes finding qualified engineers a breeze. We needed an experienced ASP.NET MVC architect to guide the development of our start-up app, and Toptal had three great candidates for us in less than a week. After making our selection, the engineer was online immediately and hit the ground running. It was so much faster and easier than having to discover and vet candidates ourselves.

Jeff Kelly, Co-Founder

Concerted Solutions

We needed some short-term work in Scala, and Toptal found us a great developer within 24 hours. This simply would not have been possible via any other platform.

Franco Arda, Co-Founder

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How to Hire HTML5 Developers through Toptal

1

Talk to One of Our Industry Experts

A Toptal director of engineering will work you to understand your goals, technical needs, and team dynamics.
2

Work With Hand-Selected Talent

Within days, we'll introduce you to the right HTML5 developer for your project. Average time to match is under 24 hours.
3

The Right Fit, Guaranteed

Work with your new HTML5 developer for a trial period (pay only if satisfied), ensuring they're the right fit before starting the engagement.

FAQs

  • How are Toptal HTML5 developers different?

    At Toptal, we thoroughly screen our HTML5 developers to ensure we only match you with talent of the highest caliber. Of the more than 100,000 people who apply to join the Toptal network each year, fewer than 3% make the cut. You'll work with engineering experts (never generalized recruiters or HR reps) to understand your goals, technical needs, and team dynamics. The end result: expert vetted talent from our network, custom matched to fit your business needs. Start now.

  • Can I hire HTML5 developers in less than 48 hours through Toptal?

    Depending on availability and how fast you can progress, you could start working with a HTML5 developer within 48 hours of signing up. Start now.

  • What is the no-risk trial period for Toptal HTML5 developers?

    We make sure that each engagement between you and your HTML5 developer begins with a trial period of up to two weeks. This means that you have time to confirm the engagement will be successful. If you're completely satisfied with the results, we'll bill you for the time and continue the engagement for as long as you'd like. If you're not completely satisfied, you won't be billed. From there, we can either part ways, or we can provide you with another expert who may be a better fit and with whom we will begin a second, no-risk trial. Start now.

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HTML5

How to Hire a Great HTML5 Developer

The Challenge

Today, HTML is over 20 years old. Over these 20 years, HTML was upgraded 4 times, leaving us with current HTML version 5. The upgrade path was not an easy one: W3C, official maintainer of the HTML specification, was slow in bringing new features to the specification, so web browser developers took things into their hands. This only resulted with more problems, especially for developers that were struggling to create web pages. It caused many cross-browser compatibility issues and wasted development hours. In today’s technology landscape, HTML5 development has become an integral part of any front-end development. Although it is not a programming language, it is still an essential component of web applications and web design, and even modern desktop and mobile applications. Today in technology, being 20 years actively used is a very long period. Accordingly, resumes that reference at least some degree of HTML5 experience have essentially become universal in the software and web development community. This makes locating HTML5 experts fairly easy, but makes pinpointing the perfect one that much more of a challenge.

Old habits die hard. Start using new HTML5 semantic tags today.

Old habits die hard. Start using new HTML5 semantic tags today.

Our hiring guide will help you find HTML5 programmers who strive to follow high-quality approaches to improve user experience and have strong knowledge of HTML5 specifications. There’s no magic or foolproof technique, but there are certainly questions you can pose that will help determine the depth and sophistication of a candidate’s knowledge of the language. A brief sampling of such questions are provided below.

Questions and Answers

Q: HTML5 was designed to replace both HTML 4 and XHTML. Discuss new HTML5 features and key goals of the HTML5 specification.

Major goals of the new HTML5 specification were to deliver rich content (like graphics and videos) to customers without the need for additional plugins (namely Flash and Silverlight), to provide better semantic support for web page structure through the introduction of new structural element tags, to provide a stricter parsing standard to simplify error handling, and to simplify backward compatibility with documents written to older standards. In the end, the most important goal in a modern world is to provide better cross-platform support and to ensure that it all works well whether running on desktop computer, laptop, tablet, or even a smartphone.

To achieve all that, many new features were introduced with HTML5. New HTML5 improved support for embedding graphics, audio, and video content via the new <canvas>, <audio>, and <video> tags. Web workers were introduced, new extensions to the JavaScript API such as geolocation were added, new drag-and-drop features, as well as local storage and caching features. Many new semantic tags and new form controls were introduced to complement the structural logic of modern web applications.

Q: Explain what semantic HTML is and name new semantic HTML5 elements.

Semantic HTML is an HTML where the markup, or tags, show the meaning instead of pure presentation or look. For example, HTML5 recommends use of <strong> tags instead of <b> for bold text, and <em> instead of <i> for italic text. These semantic tags will generate the same bold and italic text, but instead of pure formatting information, they provide a meaning too.

HTML5 specification defined whole new semantic elements, like:

  • <article>
  • <aside>
  • <details>
  • <figcaption>
  • <figure>
  • <footer>
  • <header>
  • <main>
  • <mark>
  • <nav>
  • <section>
  • <summary>
  • <time>

New HTML5 form controls include:

  • <calendar>
  • <date>
  • <time>
  • <email>
  • <url>
  • <search>

Q: Discuss potential developer’s pitfalls with HTML5.

Old habits die hard. Many developers write modern web applications in HTML5 by using old specifications. The most prominent examples are when developers use <table> tag to setup a layout, or <span> or <div> when new semantic tags like <header>, <footer>, <article> or <aside> tags would be more appropriate. Or as discussed before, they don’t use new semantic tags <strong> or <em> instead of <b> and <i> tags. The result of this old approach is over-complicated markup that is behaving inconsistently across different browsers. When writing new HTML5 documents, developers should adopt new semantic tags, enjoy all the benefits that come with HTML5 specification, and let the old habits live in the past.

Q: Discuss how new HTML5 elements could be used in different combinations, namely <header> and <footer>, and <section> and <article>.

New HTML5 elements opened up a whole new combination of possibilities and interesting ways of their usage.

For example, despite classic knowledge that there can only be one header and only one footer, new HTML5 document can contain multiple <header> and <footer> elements. Both the new semantic tags are designed to serve their respective purposes in relation to their parent element. This means that not only the page <body> can contain a header and a footer, but so can every <article> and <section> element.

Another example is usage of new <section> and <article> elements, and their combination: <section> can contain <article> elements, and an <article> can contain <section> elements. To describe this with an example: in your web page you could have a dashboard page with a <section> for social network interactions, and a <section> for the latest news articles which would contain several <article> elements. Conversely, an <article> might contain a <section> at the end for reader comments.

Q: Discuss how HTML5 simplified HTML structure. Provide examples.

For a start, HTML5 specification simplified doctype declaration. Doctype, or Document Type Declaration, tells the browser what type of document they can expect. The old XHTML doctype declaration was as follows:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

While HTML4 Transitional doctype looks like this:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">

The new doctype declaration for HTML5 is very simple:

<!DOCTYPE html>

Another simplification that HTML5 introduced, is how we declare character encoding, or charset, of the document. The charset declaration in HTML5 is as follows:

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    ...
  </head>
  <body>
    ...
  </body>
</html>

This is much simpler than previously in HTML4 which didn’t have charset meta attribute:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
   "http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    ...
  </head>
  <body>
    ...
  </body>
</html>

HTML5 specification went so far in the simplification, that the tags <html>, <body> and <head> are not mandatory for an HTML5 document to be valid. Following simple example will pass W3C Markup Validation Service:

<!DOCTYPE html>
<title>My title</title>
<header>My header</header>
<p>Wall of text</p>

The only important tag in this example to work is the new doctype for HTML5, without it the browser will not be able to detect that it is an HTML5 document.

Q: Explain why a cross-browser support is still important if all the modern browsers follow the same HTML5 specification.

HTML5 specifications is a set of rules that defines a valid document, and also provides instructions on how browsers must interpret and render such a document. Unfortunately, the reality is that no browser still supports all the rules defined by HTML5 specification. Most of the major browsers are supporting most of the specification, but there are still differences in browser interpretation of HTML5 specifications. As a result, it is necessary for the developer to confirm whether the aspect they are making use of will be supported by all of the browsers on which they hope to display their content. This is why cross-browser support continues to be a headache for developers, despite the improved specifications.

Q: Discuss accessibility aspects of HTML5, especially its limitations and problems when used in real world.

Today, web pages and applications are used more and more, and making them accessible to people who rely upon assistive technology is becoming more important than before. HTML has gone a long way, and HTML5 introduced new user interface features which enable people who rely upon assistive technology to use the web more easily. Although, there are problems. One of the problems is that developers and designers previously didn’t pay too much attention to this aspect of their web pages or applications. In their defense, as mentioned, one of their main reasons was that the web prior HTML5 didn’t have any accessibility interface features. And now, even if developers want to implement additional accessibility options in their applications, there is a constant problem any new and emerging web technology is facing: browser support. HTML5 accessibility is keeping track of the most common accessibility features across browser. To implement accessibility features and to cover all the browsers, additional time investment is required from developers. This can be a key factor that clients need to anticipate if they want their web applications and pages to be on the edge of what is possible with technology today.

Q: Explain HTML5 Web Storage, discuss its security considerations, and the difference between localStorage and sessionStorage.

HTML5 enabled web pages to store data locally within the user’s browser with use of Web Storage. In earlier versions, developers could only use cookies. New Web Storage is more secure and faster. Unlike cookies, data from Web Storage is not included with every server request, it is used only when asked for. The data is stored as a name and value pairs. Other benefits over cookies is storage limit. Web storage can be up to 5MB big, and its content is never transferred to the server. A web page can only access data stored by itself because it is limited per origin.

It is important to note that while Web Storage is more secure than cookies, there are things to keep in mind. It is better than using cookies because the content is not transmitted over the wire, but local storage is not encrypted. For that reason, sensitive data like security tokens should never be stored there. Web application should never rely on data stored in Web Storage, as a malicious user can easily modify data in the localStorage and sessionStorage values at any time.

Speaking of sessionStorage, the difference between localStorage and sessionStorage involves the lifetime and scope of the storage. Data stored through localStorage is permanent: it does not expire and remains stored on the user’s computer until a web application deletes it, or the user asks the browser to delete it. On the other hand, sessionStorage has the same lifetime as the browser tab in which the script that stored it is running. When the tab is closed, any data stored through sessionStorage is deleted.

Unlike the origin limit of the localStorage, sessionStorage is window scoped. For example, if a user has two browser tabs displaying documents from the same origin, those two tabs have separate sessionStorage data. The scripts running in one tab cannot read or overwrite the data written by scripts in the other tab, even if both tabs are visiting exactly the same page and are running exactly the same scripts.

Q: Explain what web workers are.

JavaScript is a single-threaded language, so multiple scripts cannot run at the same time. Web workers is a new API for running scripts in the browser background independently of other scripts, in its own thread. The result is that web pages don’t need to wait for web workers to complete, which improves performance and responsiveness, because users can interact with the page while the web worker is still running in the background. Web workers are, for example, perfect for long-running scripts that do heavy computation.

Wrap Up

We just scratched the surface of the knowledge needed to be a dedicated HTML5 developer full-time or part-time. Finding true masters of HTML5 is a challenge. We hope you find the questions presented in this post to be a useful foundation in your quest for the elite few among HTML5 developers. Finding such candidates is well worth the effort, as they will undoubtedly have a significant positive impact on your team’s productivity and results.

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