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.

authors are vetted experts in their fields and write on topics in which they have demonstrated experience. All of our content is peer reviewed and validated by Toptal experts in the same field.

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authors are vetted experts in their fields and write on topics in which they have demonstrated experience. All of our content is peer reviewed and validated by Toptal experts in the same field.

Unit Testing in Flutter: From Workflow Essentials to Complex Scenarios

Incorporate comprehensive unit testing into your Flutter project to ensure best practices and reduce bugs before—not after—the app’s release.

10 minute readContinue Reading

Dacian Florea

Dacian is a senior full-stack mobile applications developer, a Flutter expert, and a contributor to the Flutter framework. He helps companies around the world design and implement quality software solutions and deliver excellent user experiences.

How to Hire Angular Developers: Key Skills and Knowledge to Look For

Many developers looking for their next gig claim to have experience with Google’s popular front-end framework. Here, international Angular coach Bo Vandersteene tells hiring managers how to separate the best from the rest.

14 minute readContinue Reading

Bo Vandersteene

Bo is a front-end developer with extensive expertise in Angular. She has served as a senior software engineer and Angular coach on teams across many European companies and presented at AgentConf, Devoxx, AngularConnect and more.

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Identifying the Unknown With Clustering Metrics

Clustering in machine learning has a variety of applications, but how do you know which algorithm is best suited to your data? Here’s how to amplify your data insights with comparison metrics, including the F-measure.

12 minute readContinue Reading

Surbhi Gupta

Surbhi is a data scientist and developer with expertise in machine learning and robotics. A former senior data science engineer at Utopia Global, her experience ranges across ML fields including NLP, computer vision, and OCR. She has a master’s degree in mechatronics, and has published research in the field of robotics and optimization.

Future-proof Your Android Code, Part 2: Functional Reactive Programming in Action

The functional reactive programming (FRP) paradigm is becoming increasingly mainstream. In this installment, we discuss FRP essentials like system design and libraries, and implement a sample application.

8 minute readContinue Reading

Iliyan Germanov

Iliyan is an Android developer and CTO who has founded four startups and created several top-rated apps, including Ivy Wallet, which has received 10 YouTube tech community “best UI/UX” awards. He specializes in functional programming, UX, Kotlin, and Haskell.

Future-proof Your Android Code, Part 1: Functional and Reactive Programming Foundations

This tutorial explores the mathematical concepts behind two key programming paradigms, functional programming and reactive programming, so you can build long-lasting Android architecture.

12 minute readContinue Reading

Iliyan Germanov

A .NET Programmer’s Guide to CancellationToken

Microsoft created a standardized cancellation implementation that has far-reaching capabilities beyond its original use case.

7 minute readContinue Reading

Davit Asryan

Davit is a software engineer who has a broad range of experience in creating enterprise software for companies, including Veritas. His expertise is developing with .NET and C#.

.NET on Linux: Simpler Than It Seems

Discover Microsoft .NET’s cross-platform development capabilities by building a Dockerized ASP.NET and Entity Framework application on Linux.

8 minute readContinue Reading

Zablon Dawit

Zablon is a full-stack web developer specializing in ASP.NET and JavaScript. He has created enterprise software for various companies, including Pelmorex Corp and S.R.E Software Development.

Toptal Engineering Expert

Gabriel Courtemanche

Gabriel is a highly efficient and reliable professional who possesses a broad skill set for web application development. He's been working on a range of products and clients—from working on scalability problems in production engineering teams at Shopify and Autodesk to launching new applications for startups. Most of his work consists of leading technical teams, by creating an easy development environment, fixing technical debts, providing best practices code examples, and mentoring devs.