Toptal Blog

Oracles are changing the way we view and create smart contracts. How do we implement them in Ethereum, using nothing but Solidity and standard dev tools?

In the first article of our three-part series, Toptal Blockchain Developer John R. Kosinski explains how to get started and compile a smart contract with oracles.

Traditionally, connecting devices for peer-to-peer communications has been a tedious task: An application needs to discover what’s around it, open connections on both sides, and then maintain them as network infrastructure, connections, distances, etc. Realizing the difficulties inherent in these activities, in iOS 7 and macOS 10.10 Apple introduced its MultipeerConnectivity framework.

Join Toptal Freelance iOS Developer Ben Gottlieb as he explains what MultipeerConnectivity is, and teaches us how to use it.

Have you ever wondered if you can apply design thinking principles with a limited time and budget? If so, check out this in-depth Design Thinking use case, which details how Design Thinking helped a company to save its product.

Hidden in Excel and Power BI is a powerful data analysis pack named Get & Transform (previously known as Power Query). It is an ETL pack for cleaning and sorting raw data from a range of input sources, such as CSV and text files. This tutorial demonstrates how to–quite literally– get and transform data in Excel, in ways that can help the data analyst save time and uncover more insight.

Let’s face it, robots are cool. In this post, Toptal Engineer Nick McCrea provides a step-by-step, easy-to-follow tutorial (with code samples) that walks you through the process of building a basic autonomous mobile robot.

There are many UX design tools on the market, but their capabilities vary. This review examines the effectiveness of Sketch, Axure, and Figma with a task-based comparison.

While often overlooked, the data warehouse enables companies to reveal valuable insights concealed within their vast data troves. In this article, domain expert Josip Saban shares foundational principles and applications that are essential knowledge for all modern managers.

Possibly with the exception of color, the typeface styles used in a design have a greater impact on the way a user perceives that design than virtually any other individual design element.

The humble ERC20 token specification has become the de facto standard for Ethereum tokens. If you come across an Ethereum smart contract, chances are it’s ERC20-compliant.

In this guide, Toptal Freelance Ethereum Developer Gilad Haimov demonstrates how you can create and deploy your own ERC20 token in under an hour.