Design system: why and how

Design systems are products for teams that build interfaces, not a library of ideal components in and of themselves. Start with repetitive pain and the most used patterns, align input and versioning, and measure success by acceptance, speed, and reduction of discrepancies.

Definition and essence of a design system

What is a design system?

A design system is a set of standards, components, and guidelines that help you create interfaces consistently and quickly, and it has color palettes, typography, icons, buttons, templates, and most importantly, the principles of how everything is applied on the product.

Why it matters for UX

Without a single design system, a product quickly loses integrity, and the user encounters different buttons and shapes in even one application, which confuses and hinders trust, and the design system solves this problem: the interface becomes predictable and clean.

Cases from practice

For large services like https://ux.pub/how-yandex-zen-built-a-design-system/, the introduction of a design system has made it possible to speed up the launch of new partitions and reduce the number of visual bugs. Teams no longer argue about color or alignment — everyone knows how it should be.

The main tasks and benefits for business

Saving time and reducing errors

With a design system, designers and developers use ready-made solutions. Don’t spend hours thinking, agreeing, and explaining. Less experienced team members get involved faster, documentation helps to figure it out.

Product scalability

When a product grows, the interface has to be uniform across all parts, even if commands are distributed, and the design system is a way of ensuring that UX requirements are met everywhere.

Example for the product

The Internet bank has implemented a design system, and as a result, new services are coming in faster, and mobile and web versions always look the same, and the number of bug reports about visual inconsistencies has dropped dramatically.

Structure and main elements of the design system

Basic components

Colors, fonts, indentations, icons, basic UI elements: buttons, inputs, checkboxes, all of which are in the library, reused and documented.

Guidelines and patterns

Interface rules: how and when to use components, how to write buttons, and what to do when you make mistakes. A good system has examples of what to do and what to avoid.

An example from SaaS

SaaS has a detailed guide to using cards and bug messages, and new designers immediately understand how to handle these patterns — the interface doesn’t run away.

How to implement a design system: step by step

Collecting and analyzing an existing interface

The team collects all the current elements: colors, fonts, buttons, shapes, and identifies duplicates and inconsistencies.

Development and testing of components

They create standard UI elements, they’re tested on different screens, they’re taken apart by product scientists and developers.

Documentation and support

Each element has a page in the documentation, and the important thing is to describe when the component can be used and when it can’t be used.

Example of implementation

Fintech started by auditing the interface, identifying the main repeating elements, unifying them, and putting them into Figma, and then all the new features require only those components.

Common Mistakes and How to Avoid Them

There’s no single owner.

If no one is following the development of a design system, it quickly becomes obsolete.

Poor description and lack of instructions

The components are there, but no one knows when or how to take them.New joiners spend time in litigation.

Ignoring feedback from the team

If you don’t use criticism of real-world product teams, the system will become bureaucratic ballast.

What do you do?

Single owner, regular reviews, quick improvements to the system at the request of teams.

Who needs a design system and when to build it

For whom is relevant?

For any product that has a growing interface or multiple commands, it’s especially important if you have a web, a mobile app, or a b2b direction.

The best time to implement

Don’t wait for the perfect time. You can start small, collect the basic buttons, the colors, and register them on a wiki or Figma, and you’ll see progress in a couple of weeks.

Recommended sources and benchmarks

• Design Systems Repo – Large collection of guidelines and examples
• Native Systems: Google Material and Apple Human Interface Guidelines
• 12 practical tips for design systems

FAQ

Why does a product need its own design system when there are ready-made frameworks (Material, Ant Design)? To develop a unique brand, keep UX under full control and not depend on other people’s restrictions.

**Do I need to invest in the design system at the start of the project? If you have plans to grow, yes, at least at the minimum level: single buttons, colors and navigation.

**How long does it take to implement a complete design system? The exact numbers depend on the product. Usually, a quick start takes a few weeks, it takes a couple of months to develop a system.

**Who is responsible for updating the design system? Design system owner paired with a working group of designers and developers.

**Is it possible to do with Figma/Storybook? No. These are visualization tools, but you need more rules, examples and documentation on how to use them.

**How do you convince your management to invest in a design system? Show me how long it takes to manually work out interfaces, bugs and bugfixes, and that’s an investment that pays off multiple times.