Toptal Blog

The Toptal Blog is the top hub for developers, designers, finance experts, executives, and entrepreneurs, featuring key technology updates, tutorials, freelancer resources, and management insights.

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Building a Node.js/TypeScript REST API, Part 2: Models, Middleware, and Services

by Marcos Henrique da Silva

The Express.js REST API journey continues! Move from models to full DAOs and DTOs, validate requests with middleware, separate services from controllers, and prepare for a real database.

17 minute readContinue Reading
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The Ultimate Experience: A Guide to the Principles of Sensory Design

by Micah Bowers

Digital design routinely ignores neurological factors beyond sight. Sensory design principles emphasize the interconnection of human perception and prompt designers to explore non-visual solutions.

5 minute readContinue Reading
EngineeringIcon ChevronData Science and Databases

Machine Learning Number Recognition - From Zero to Application

by Teimur Gasanov

Harnessing the potential of machine learning for computer vision is not a new concept but recent advances and the availability of new tools and datasets have made it more accessible to developers. In this article, Toptal Software Developer Teimur Gasanov demonstrates how you can create an app capable of identifying handwritten digits in under 30 minutes, including the API and UI.

10 minute readContinue Reading
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Billing Extraction: A Tale of GraphQL Internal API Optimization

by Maciek Rząsa

Extracting functional components from a monolithic app into a service can be a daunting task but choosing the right tools and techniques for the job can expedite the process. In this article, Toptal Back-end Engineer Maciek Rzasa recounts how his team extracted billing functionality from the Toptal platform and how they overcame a series of performance issues.

11 minute readContinue Reading
EngineeringIcon ChevronEngineering Management

Software Engineer Performance Reviews Explained

by Nermin Hajdarbegović

Software development is a complex process and evaluating the performance of software engineers can be too. It is important that you find the right balance between that complexity and practicality in software engineer performance reviews. In this article, Toptal Engineering Blog Editor Nermin Hajdarbegovic outlines the difference between commonly used performance review models and discusses how they should be employed.

11 minute readContinue Reading
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Think Business – How to Increase Your Designer Value

by Damola Taiwo

The principles that govern design are foreign to many business leaders but it takes more than shiny deliverables to span the knowledge gap. Designers must translate design value into business value.

< 5 minute readContinue Reading
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A Month in the Life - Interim CFO Roles and Best Practices

by Jen Banzaca

An interim CFO has, on average, six to eight months to complete the job set forth by the company, meaning the first 30 days will be critical to accomplishing the goals for the position and setting a good long-term strategy for the company.

8 minute readContinue Reading
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WebAssembly/Rust Tutorial: Pitch-perfect Audio Processing

by Peter Suggate

WebAssembly gives near-native performance to web apps and allows languages other than JavaScript—plus their libraries—to be used on the web. This tutorial leverages Rust and the Web Audio API to make a basic guitar tuner app that runs at 60 FPS, even on mobile.

24 minute readContinue Reading
DesignIcon ChevronUX Design

Paving the Path to Purchase – eCommerce UX Best Practices

by Micah Bowers

Mobile eCommerce may be the future, but desktop sites are digital gold mines. To engage shoppers, boost product value, and unlock more revenue, designers must master these eCommerce UX best practices.

8 minute readContinue Reading

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