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.

Building Reactive Apps with Redux, RxJS, and Redux-Observable in React Native

While Redux is a great state management solution, it doesn’t support asynchronous behavior by default. A way around this is to use redux-observable, based on RxJS - a powerful library for reactive programming in JavaScript.

9 minute readContinue Reading

Sourabh Verma

Sourabh has a broad and versatile skill set. His experience with mobile and back-end development enables him to build prototypes quickly.

Performance and Efficiency: Working with HTTP/3

HTTP/3 is on the horizon, but many aren’t even familiar with HTTP/2 yet. Find out what HTTP/3 means for web development, administration, and the internet.

15 minute readContinue Reading

Brian Wojtczak

Brian was a system administrator and network engineer before turning to software development in an effort to automate himself out of a job.

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Lighter and Faster: A Guide to the Svelte Framework

Web applications are becoming more popular day by day with stable options like React.js, Angular, and Vue.js. However, a serious competitor may be on the horizon: Svelte.

In this article, Toptal freelance software developer Teimur Gasanov introduces Svelte, a new framework for building user interfaces. He does so by walking us through creating a common log-in form used by virtually every type of application.

10 minute readContinue Reading

Teimur Gasanov

Teimur is a full-stack developer who has worked mostly with JavaScript, Go, and Python. He is also experienced with Docker and Jenkins CI/CD.

The Strengths and Benefits of Micro Frontends

Micro-frontend architectures decompose a front-end app into individual, semi-independent “microapps” working loosely together. This can help make large projects more manageable, e.g. when transitioning from legacy codebases.

12 minute readContinue Reading

Bob Myers

Bob Myers is a front-end architect who has consulted on large-scale projects in fields ranging from education and publishing to finance.

Integrating Stripe and PayPal Payment Methods in Ruby on Rails

Secure payment processing is a key prerequisite for any eCommerce operation. If it fails, the consequences can be catastrophic for any company, big or small.

In this article, Toptal Ruby on Rails Developer Henrique Reinaldo Sarmento outlines how you can create a Ruby on Rails eCommerce app, leveraging PayPal and Stripe for reliable and secure payments.

25+ minute readContinue Reading

Henrique Reinaldo Sarmento

Henrique is a passionate full-stack developer and cloud computing enthusiast with experience in Ruby on Rails, Flask, Javascript and React.

Machines and Trust: How to Mitigate AI Bias

Unwanted AI bias is already a widespread problem. Machine learning models can replicate or exacerbate existing biases, often in ways that are not detected until release. So what can be done about it?

13 minute readContinue Reading

Michael McKenna

Mike is a data scientist, data ethicist, and machine learning engineer specializing in health and retail. He currently serves as the Director of Data Ethics at Services Australia. As a senior data scientist at CVS, Mike led COVID-19 vaccine demand forecasting, liaising closely with the White House and the CDC as part of Operation Warp Speed.

Introduction to Functional Programming: JavaScript Paradigms

Functional Programming is a paradigm of building computer programs using expressions and functions without mutating state and data.

In this article, we will talk about doing functional programming using JavaScript. We will also explore various JavaScript methods and features that make it possible. In the end, we will explore different concepts associated with functional programming and see why they are so powerful.

6 minute readContinue Reading

Avi Aryan

Avi is a full-stack developer skilled with Python, JavaScript, and Go and is also a multiple-time Google Summer of Code participant.

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.