We are a European deep-tech leader in quantum and AI, backed by major global strategic investors and strong EU support. Our groundbreaking technology is already transforming how AI is deployed worldwide — compressing large language models by up to 95% without losing accuracy and cutting inference costs by 50–80%.
Joining us means working on cutting-edge solutions that make AI faster, greener, and more accessible — and being part of a company often described as a “quantum-AI unicorn in the making.”

We offer

Competitive annual salary starting from €45,000, based on experience and qualifications.

Two unique bonuses: signing bonus at incorporation and retention bonus at contract completion.

Relocation package (if applicable).

Fixed-term contract ending in June 2026.

Hybrid role and flexible working hours.

Be part of a fast-scaling Series B company at the forefront of deep tech.

Equal pay guaranteed.

International exposure in a multicultural, cutting-edge environment.

What you’ll do

Own the end-to-end design process for internal and customer-facing products: discovery → flows/wireframes → UI/UX → handoff.
Create clean, scalable UI designs for dashboards, account management tools, configuration panels, and LLM-driven interfaces.
Build and maintain a Figma component library aligned with our engineering stack.
Collaborate daily with product managers, engineers, and domain experts in AI/quantum to translate highly technical concepts into usable interfaces.
Conduct small research loops with users and internal stakeholders to validate assumptions and improve the product experience.
Ensure design consistency and accessibility across applications.

Required Qualifications

2–5 years of experience as a UI/UX Designer, Product Designer, or similar role working on modern web applications.
Strong proficiency in Figma (design systems, auto-layout, component libraries, prototyping).
Demonstrated ability to design complex dashboards, data-heavy UIs, configuration screens, and workflow-oriented applications.
Solid understanding of user-centered design, information architecture, interaction design, and usability principles.
Experience collaborating closely with product managers and engineers to translate business needs into intuitive user flows.
Ability to deliver production-ready UI specs, design tokens, component references, and clear documentation for developers.
Comfortable running lightweight user research: interviews, usability testing, concept validation, heuristic evaluation.
Strong visual design skills: spacing, layout, typography, hierarchy, consistency.

Preferred Qualifications

Experience designing interfaces for AI/ML tools, LLM-powered products, or automation workflows.
Familiarity with design systems used in modern frontend stacks (Tailwind, ShadCN, Material UI).
Experience with data visualization and storytelling (charts, tables, metric views, drill-down patterns).
Ability to work in fast iteration cycles, supporting experiments and internal prototypes.
Understanding of how engineering constraints influence design decisions — ability to balance feasibility and UX quality.
Experience defining or maintaining a Design System for consistency across multiple internal tools.
Bonus: basic familiarity with frontend technologies (React, TypeScript) to improve designer–developer collaboration.

About Multiverse Computing

Founded in 2019, we are a well-funded, fast-growing deep-tech company with a team of 180+ employees worldwide. Recognized by CB Insights (2023 & 2025) as one of the Top 100 most promising AI companies globally, we are also the largest quantum software company in the EU.
Our flagship products address critical industry needs:

CompactifAI → a groundbreaking compression tool for foundational AI models, reducing their size by up to 95% while maintaining accuracy, enabling portability across devices from cloud to mobile and beyond.

Singularity → a quantum and quantum-inspired optimization platform used by blue-chip companies in finance, energy, and manufacturing to solve complex challenges with immediate performance gains.

You’ll be working alongside world-leading experts in quantum computing and AI, developing solutions that deliver real-world impact for global clients. We are committed to an inclusive, ethics-driven culture that values sustainability, diversity, and collaboration — a place where passionate people can grow and thrive. Come and join us!

Department: Technical
Role: Software Engineer
Locations: Zaragoza
Employment type: Contract
Workplace type: Hybrid
Seniority level: Mid-Senior level

About MULTIVERSE COMPUTING

Come and join our multicultural team!

5 locations
+27 languages

Founded in 2019

Coworkers +150

Technical · Zaragoza

UI/UX Designer (Fixed-term contract)

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