Toptal Blog

In this article, Toptal Freelance JavaScript Developer Nick Chikovani shows how easy it is to perform web scraping using a headless browser. Specifically, he provides a Puppeteer tutorial, going through a few examples of how to control Google Chrome to take screenshots and gather structured data.

Even exciting product ideas can flop without an understanding of the user problem to solve. A design problem statement is an essential step in the design process for creating products that truly matter.

Finding out your return on investment from a project can become a subjective process with the myriad of returns measures and formulas that exist. This overview provides a breakdown and explanation of how to calculate return on investment, looking at what type of return you need to measure and how to arrive at an answer. With further guidance on how to use returns data to guide objective decision making.

A consistent UI leads to a better UX. But with so many moving parts in modern user interfaces, how can UI designers be sure they’re staying true to a digital product’s look and feel?

How do you approach machine learning problems? Are neural networks the answer to nearly every challenge you may encounter?

In this article, Toptal Freelance Python Developer Peter Hussami explains the basic approach to machine learning problems and points out where neural may fall short.

Hot module replacement is one of the most useful features offered by Webpack. It allows all kinds of modules, including JSON, CSS, and JS files, to be updated at runtime without needing a full refresh.

In this article, Toptal Freelance JavaScript Developer Shaojiang Cai demonstrates how to use Hot Module Replacement in Redux.

Biotech companies with little to no revenue can still be worth billions. Consider the most prominent 2017 biotech M&A deal when Gilead bought Kite Pharma for almost $12 billion. At the time of the deal, Kite had over $600 million in accumulated deficit, but it also had a pipeline of CAR-T cell therapies, which treat cancer. This article examines how to value such pipelines. It also focuses on the risk-adjusted NPV valuation methodology, portfolios of multiple drug candidates, and how value is impacted by the characteristics of the investor or acquirer.

Sketch is a valuable, time-saving resource for any designer’s toolbox. Though not every designer chooses to do so, creating style guides in Sketch can make it even more of a time-saver.

ASP.NET Core is a leaner and more modular redesign of ASP.NET 4.x.

In this article, Toptal Freelance ASP.NET Developer Damir Imangulov shows how to build a robust RESTful API using ASP.NET, EF Core, AutoMapper, and XUnit.