Senior Frontend Engineer – AI UI/UX in Barcelona

Wellfound; Barcelona; On-site; EUR 55,000 - 70,000; Full time

Job summary

Migma in Barcelona, Spain is hiring a frontend engineer to own product experiences from sketch to shipped UI. You will work directly with the two-person founding team, turning designs into polished interfaces using React, Next.js and TypeScript.

You will improve onboarding, campaign editor, and core journeys, crafting accessible, responsive interfaces with strong typography and layout, while keeping code maintainable and aligned with user feedback.

Qualifications

• Proven experience shipping React products in production.
• Excellent HTML and CSS skills with typography and layout sense.
• Strong UX judgment and ability to explain design decisions.
• Comfort turning designs into working interfaces; in-person collaboration in Barcelona.

Responsibilities

• Improve onboarding and core product journeys.
• Design and implement interfaces in React, Next.js, and TypeScript.
• Build reusable components and ensure visual consistency.
• Address responsive layouts, accessibility, and loading/error states.
• Use feedback and analytics to guide improvements.
• Keep frontend code maintainable and performant.

Skills

React

HTML/CSS

UX judgment

Figma

Ownership

Tools

Next.js

Tailwind CSS

TypeScript

Job description

Migma in Barcelona, Spain is hiring a frontend engineer to own product experiences from sketch to shipped UI. You will work directly with the two-person founding team, turning designs into polished interfaces using React, Next.js and TypeScript.

You will improve onboarding, campaign editor, and core journeys, crafting accessible, responsive interfaces with strong typography and layout, while keeping code maintainable and aligned with user feedback.