M

Senior Frontend Engineer & Product Designer

mau • Spain
Remote
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AI Summary

Senior Frontend Engineer with strong product design skills to own the end-to-end design and development of AI products. Responsible for creating high-converting UI/UX, building design systems, and shipping production-quality code using React and TypeScript. Requires 5+ years of frontend experience, a strong design portfolio, and proficiency in Node.js and PostgreSQL.

Key Highlights
Full ownership of product design and frontend engineering from wireframe to production.
Focus on high-converting revenue surfaces, onboarding flows, and AI-native interfaces.
Remote-first international team with flexible work arrangements and Barcelona office option.
Key Responsibilities
Own product design end to end, defining look, feel, and flow from wireframe to final pixel.
Design clean, polished UI with strong visual hierarchy, typography, spacing, colour, and motion.
Simplify complex AI capabilities into intuitive interfaces and run usability tests.
Design and build onboarding, activation, and high-converting revenue surfaces like landing pages and checkout flows.
Build and maintain the design system including tokens, components, patterns, and guidelines.
Prototype concepts quickly and iterate based on user feedback and metrics.
Harden codebase, maintain performance, and evolve UX as products scale.
Instrument features, run A/B tests, and analyze funnel data to drive improvements.

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Technical Skills Required
TypeScript React Node.js
Benefits & Perks
Flexible hours and full remote or hybrid work options
Free Friday afternoons and reduced workweek in summer
Top-tier private health insurance including dental and psychological services
25 days vacation plus birthday off
Annual budget for external learning opportunities

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Nice to Have
Experience launching and scaling products in a startup or venture studio
Hands-on SEO experience including technical audits and SSR/SSG rendering
Familiarity with experimentation and analytics tooling like Amplitude or GA4
Experience with LLM engineering, prompt tuning, RAG pipelines, or agentic frameworks

Job Description

. With , we bring together multidisciplinary teams to turn ideas into meaningful, high-impact solutions.Within the group, focuses on subscription-based apps and digital products. It builds on the expertise, technology and product mindset developed at Leadtech, combining proven experience with a strong focus on user value and long-term growth.Across both brands, we share the same approach: a deep commitment to understanding people and creating experiences that make a difference — for our users and for our teams.We work as
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Job Overview
Posted Date Oct 04, 2026
Employment Type Full-time
Experience Level Not Applicable
Location Spain
Category Programming
Company mau
Mentioned Skills
react typescript node.js next.js postgresql ai figma designer typography product design responsive interaction design design systems ui ux looker seo

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