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Toptal Engineering Blog
The Toptal Engineering Blog is a hub for in-depth development tutorials and new technology announcements created by professional software engineers in the Toptal network.
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Building an Android POS App That Can’t Be Closed
It’s not every day that a client asks a developer to create a mobile app that cannot be closed, but this can be a crucial feature for Point of Sale (POS) devices.
In this article, Toptal Software Developer Tudor Filip Stupariu demonstrates how he built an Android POS app that can’t be closed.
Tudor Filip Stupariu
Tudor is a full-stack software developer focused on JavaScript. He created numerous mobile and web apps, as well as server-side apps.
The Many Applications of Gradient Descent in TensorFlow
TensorFlow is one of the leading tools for training deep learning models. Outside that space, it may seem intimidating and unnecessary, but it has many creative uses—like producing highly effective adversarial input for black-box AI systems.
Alan Reiner
Alan’s ML expertise covers visual target recognition models for missile defense systems, real-time NLP, and financial evaluation tools.
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Using Kotlin for Back-end Development: A Quick Overview
Kotlin has features that make it an ideal language for back-end development. Learn what these features are and how you can use them to create high-performing systems.
Boldizsar Akos Mezei
Boldizsar is a Java/Scala back-end developer who has worked at Morgan Stanley on a group of microservices.
Modern Web Scraping With Python and Selenium
Web scraping has been around since the early days of the World Wide Web, but scraping modern sites that heavily rely on new technologies is anything but straightforward.
In this article, Toptal Software Developer Neal Barnett demonstrates how you can use Python and Selenium to scrape sites that employ a lot of JavaScript, iframes, and certificates.
Neal Barnett
Neal is a senior consultant and database expert who brings a wealth of knowledge and more than two decades of experience to the table.
SQL Indexes Explained, Pt. 1
Properly used, an SQL database index can be so effective that it might seem like magic. But the following series of exercises will show that underneath, the logic of most SQL indexes—and wielding them correctly—is quite straightforward.
Mirko Marović
Mirko designs and develops massive, extreme-workload databases. He also trains software developers on databases and SQL.
Don’t Build, Integrate: A Guide to CRM Integration
Customer Relationship Management systems provide businesses with more clarity and information about customer behavior, helping boost sales, retain existing customers, and attract new ones.
In this article, Toptal Software Developer Leif Gensert outlines the basic challenges of CRM integration and explains what you can do to make the process as efficient and frictionless as possible.
Leif Gensert
Leif has a decade of experience in back-end development using Ruby and Elixir. He’s worked for big consulting firms and startups alike.
Create a WhatsApp Chatbot, Not an App
Feedback on an enterprise web app prompted an experiment. Could a WhatsApp chatbot replace it? Would people like it better? Would it be more useful?
Aminadav Glickshtein
Aminadav has 20 years of professional experience. Having started coding at the age of seven, programming is like a native language to him.
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