Design System Engineer

Do you want to help us redefine how AI powers the future of Business Management software, not as an add-on, but as a core part of how people work, decide and grow?

We're looking for engineers who:

• Treat AI as central to their craft
• Are obsessed with building and shipping fast
• Care about real impact, not hierarchy or titles

If that sounds like you, keep reading.

The Role

Design System Architect:

This is for a systems thinker with technical firepower, a builder's mindset, and a strong design eye.

You'll own the architecture of our company-wide design system - evolving it from a set of components to a real product infrastructure that fuels consistency, quality, and speed across every team.

Think: building the rails for AI-powered design * dev workflows, creating seamless tooling from Figma to code, and setting the bar for how we scale quality across the product.

Factorial is scaling fast - and this role is about laying the foundations for design and engineering to move at 10x speed with 10x consistency. You'll have massive ownership, shape how we build product across the org, and leave a legacy in how we approach design quality at scale.

You won't just be contributing to a system.

You'll be engineering the product underneath the product.

What You'll Do

As a Design System Engineer at Factorial, you'll help define and build the next generation of our AI-native product using modern AI development practices.

You will:

• Lead and scale our design system across the company

Define the technical architecture, tooling, documentation, governance, and implementation plan. Help us rethink how design systems operate in an AI-native product development flow * Design and implement AI Skills

Build tools and plugins that connect Figma * code * AI-driven workflows * Develop and maintain evaluation frameworks (Evals)

Partner with design, frontend, and product to ensure pixel-perfect execution at scale. Drive best practices around accessibility, responsiveness, and usability * Stay close to our customers

We have a strong customer-centric mindset: engineers regularly join customer calls, reviews, and feedback sessions to deeply understand real workflows, pain points, and constraints - ensuring we build the right solutions to real problems, not assumptions. * Share knowledge and raise the bar

Mentor peers, document learnings, and contribute to Factorial's AI engineering best practices.

What we're looking for

Your title matters less than your mindset.

• Proven impact: shipped projects, side projects, or contributions that made a measurable difference
• Product-first thinking: you design complete experiences, not just isolated components
• Speed & adaptability: you experiment, learn, and iterate fast

Bonus points if you've worked with:

LLMs, skill-based agents, MCP, or other AI protocols

• Deep experience with React, TypeScript, and the modern frontend ecosystem
• Strong understanding of Figma, tokens, and component libraries
• Experience translating early concepts into production-grade design systems
• Product sense - you don't just code components, you understand why they exist
• Builder mindset: you ship fast, clean, and don't wait for perfect specs

Bonus if:

• You've built or contributed to internal tooling, plugins, or Figma-to-code pipelines
• You've explored ways to use AI to automate or accelerate parts of the design * dev flow
• You see design systems as a strategic layer, not just a UI toolkit

We care far more about what you've built than the stack you used.

How We Work

• Office-first in Barcelona & Madrid, with 20% remote flexibility
• A people-first, high-trust culture built on radical candor and ownership
• A multicultural team (40+ nationalities) building the next generation of business management software, We care about people and we also offer a lot of benefits for employees:
• High growth, multicultural and friendly environment
• Alan as private health insurance
• Healthy life with Wellhub (Gyms, pools, outdoor classes)
• Save expenses with Cobee
• Language classes
• Breakfast in the office and organic fruit
• Nora discounts
• Free caffeine and theine
• Pet Friendly

The hiring process

If you apply, here's what to expect: * A first conversation with our Talent Acquisition Partner. It will be about comparing our expectations and making sure we match on a human level. We will also check our Engineering Rubrics (check them out, they are open!) and the salary in your position.

• A second conversation with the team's Engineering Manager. This is about making sure we can work together. Here you will have a conversation about the team, their needs, your profile and how can you complement it. Expect to have a mix of a human and technical conversation.
• A Live Engineering Challenge with two Factorial engineers: At Factorial, we're passionate about hiring engineers who can think clearly, communicate well, leverage the best tools, and learn very fast. In this challenge, we're not looking for a finished product, but for how you structure problems, ask questions, use technology, and reason about solutions.
• One last coffee-chat with our CTO, where you can get all the answers about Factorial's culture, business vision, or anything else that interests you.
• And that's it! Feel free to request any other conversation you want, with team members or to address specific concerns at any time during the process.

The whole process is remote, using videoconferencing tools!

Factorial