United StatesToptal Member Since November 26, 2013
Justin is a technical professional with a passion for learning and 18+ years of experience leading teams to build enterprise-grade distributed applications that solve real-world problems. Justin firmly believes that collaboration across all facets of a business, from development to marketing to sales, is required to succeed in this endeavor.
David has been developing websites and web applications for all of his adult life. As a software engineer, he's worked for many diverse software companies from early-stage startups to Google. David is experienced with many web frameworks and environments, but he particularly enjoys developing with Meteor.js. He appreciates the importance of quality code as well as the need to meet scheduling demands.
James is a software engineer and consultant focused on web development. He has over a decade of experience in both startup and enterprise business environments building solutions where full-stack skills, creative thinking, and high attention to detail are key, and fast turnaround is paramount.
Starting as a Google intern, Ahmad has been leading the development of B2B services and admin web apps since 2015. On projects, he typically makes the architectural decisions about state management, framework selection, testing strategies, folder structure, team load and task allocation, and mentoring junior developers. Ahmad has also built shared UI component libraries, reusable CSS code, higher-order components, and best practices for scalable and maintainable codebases.
Ricardo has been coding for over 20 years, having worked on projects in more than 10 programming languages. He has co-founded companies, worked in a few successful startups as CTO, and managed distributed teams of developers and product designers. Ricardo's recent work has ranged from data science and machine learning to high-performing web and mobile applications, including Web3 and crypto.
With a solid mathematical knowledge base and a professional software developer background, Stepan has the experience and skills to fulfill most software engineering role. During his professional career, he's worked on various projects including large enterprise systems, web development, and cloud computing. Stepan is always eager to explore new areas in computer science and apply bleeding-edge technologies.
Anton is a senior C# developer with over ten years of experience developing both native (WinForms, WPF) and web (ASP.NET) applications for .NET and .NET Core platforms. He has expertise in leading teams, mentoring developers, automating processes, and developing web applications' front-end. He writes exceptionally clean code and is a stickler for testing, ensuring accuracy and stability.
Davor is a senior full-stack developer with 9+ years of experience, skilled in crafting scalable and efficient solutions. Proficient in both monolithic and microservice architectures, Davor is a versatile asset to any team and project with a deep understanding of front-end and back-end technologies. With a passion for problem-solving and constant learning, he is the perfect candidate to drive your company's growth.
... allows corporations to quickly assemble teams that have the right skills for specific projects.
Despite accelerating demand for coders, Toptal prides itself on almost Ivy League-level vetting.
Building a cross-platform app to be used worldwide
Creating an app for the game
Leading a digital transformation
Drilling into real-time data creates an industry game changer
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
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
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
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
Sergio was an awesome developer to work with. Top notch, responsive, and got the work done efficiently.
Dennis Baldwin, Chief Technologist and Co-Founder
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
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
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
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
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
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
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
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
Toptal offers a no-compromise solution to businesses undergoing rapid development and scale. Every engineer we've contracted through Toptal has quickly integrated into our team and held their work to the highest standard of quality while maintaining blazing development speed.
Greg Kimball, Co-Founder
Talk to One of Our Industry Experts
A Toptal director of engineering will work with you to understand your goals, technical needs, and team dynamics.
Work With Hand-Selected Talent
The Right Fit, Guaranteed
Find Experts With Related Skills
Access a vast pool of skilled developers in our talent network and hire the top 3% within just 48 hours.
First, define your project requirements: Clearly outline the technical skills, experience, and expertise needed for your project. Consider the frameworks, libraries, or tools the developer should (or must) know how to use, and determine whether you need a junior, mid-level, or senior developer.
Finally, leverage your network: Reach out to your professional contacts, attend industry events or meetups, and consider referrals from colleagues or friends to find potential candidates.
How quickly can you hire with Toptal?
There is no one-size-fits-all approach to identifying the perfect candidate for your project, but these are the three most important aspects to take into consideration:
Is the project starting from scratch?
Is there tech stack overlap?
Will they be under the supervision of a senior developer?
To summarize, start your hiring process by clearly defining your project’s needs, skills gap, and problem statement(s). Then use that context to inform the level of developer you will hire. If your project requires starting from scratch or designing a new core feature, investing in expert talent is justified. However, for less-complex tasks or when working with a limited budget, a junior developer who will have adequate supervision or a mid-level developer with previous experience in the right skills can be a cost-effective solution.
Knowledge of asynchronous programming, event handling, and callbacks is very important, allowing apps to accomplish tasks in parallel. When working with web technology in particular, developers will use external connections often, e.g., to fetch images from storage, make database requests, and call APIs. Without asynchronous programming, most server requests would cause webpages to take several seconds to load—a surefire way to lose customers.
Experience with version control systems, such as Git is a necessity for any developer, including juniors, as it allows collaborating on large teams, tracking code changes (to allow for backtracking), and resolving conflicts, all of which are integral throughout the project lifecycle.
Knowledge of software design patterns and coding best practices allows developers to create maintainable, scalable and, most importantly, readable code, making it easier for other developers to collaborate or take over projects.
The ability to write modular code makes it easier to understand, test, and maintain a large codebase. It allows for easier tracking of issues, simpler updates, and lower likelihood of conflicts between developers’ updates. A typical characteristic of more experienced developers is the ability to write properly modularized code.
Understanding testing and debugging techniques is one of the most important aspects of a developer’s job and also one of the most differentiating attributes between junior and senior developers. Bugs are part of the lifecycle of apps. So a developer should be familiar with standard testing methodology, know how to create a good test environment, and be adept at finding bugs quickly.
There are three more key skills that only apply to front-end development:
HTML, CSS, and DOM manipulation are the building blocks of the design of a website, and any front-end developer candidate should be experienced in using them. DOM manipulation encapsulates changes to a website that are visible to the user, e.g., animations or single-page apps. Even with modern frameworks where these aspects aren’t worked with directly very often, developers still need to know what’s happening behind the scenes to be effective.
Familiarity with browser compatibility issues and cross-browser testing involves understanding the differences among browsers and their rendering engines. Skilled developers address these discrepancies and perform cross-browser testing to ensure consistent user experiences across various platforms, devices, and browser versions, optimizing the application’s accessibility and reach.
Start with a solid template and include as many details as possible to try to narrow the channel of prospective applicants and thereby avoid drowning in applications. Here are some specific points you might include about your project to help applicants appropriately—but not too zealously—self-select:
The tech stack, tools, and industry
Whether the project is new or in process
The estimated length of the project
The expected outcome
The current team’s skills and gaps
Whether the position is remote, partly remote, or fully on-site
Interviews are more likely to yield a more balanced assessment if they include a mix of contextual questions—higher-level discussions about a project’s technical decisions or issues encountered—and more technical questions like these:
Null represents an intentional absence of any object value, while undefined represents a variable that has been declared but has not been assigned a value.
If a developer doesn’t need to know whether the variable is null or undefined, they can use a standard equality check against null; if they do, they’ll need a strict equality check. A good follow-up question: Ask the candidate to explain a time when they faced a situation needing a null check and the reasoning behind whether it needed to be strict or not.
What is the difference between the equality (==) and strict equality (===) operator? When should you use which?
The equality operator performs type coercion, which means it attempts to convert the operands to a common type before making the comparison. The strict equality operator never converts before comparing.
The equality operator is quite dangerous to use and is generally frowned upon since it can yield unexpected results, like the fact that an empty string is considered equal to the number zero when the two are coerced to the same type.
var is function-scoped and can be redeclared and reassigned. let and const are block-scoped, and let allows reassignment, while const does not.
Lastly, as with the job description, it’s worth including questions about more specific technologies, e.g. Node.js, that are pertinent to your project.