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.

As a Quantum Computing Engineer (Fixed term), you will

Join a world-class team of Quantum experts with an extensive track record in both academia and industry.
Work with Fortune-500 customers from government and private sectors.
Collaborate with the founding team in a fast paced startup environment.
Contribute to designing and improving Multiverse’s codebase.
Design and implement new quantum algorithms.

Required Qualifications

2+ years experience in similar positions.
Masters degree in Quantum Physics, Quantum Engineering, or related field.
Knowledge of quantum computing algorithms, particularly hybrid and gate-based techniques.
Advanced knowledge of Python and related scientific computing tools.
Experience with quantum computing SDKs (Qiskit, Pennylane, or others).
Ability to work with a diverse team of people, both in-person and through online resources.
Perfect command of English language.

Preferred Qualifications

PhD in Quantum Physics, Computer Science, or related field.
Knowledge of Machine Learning or Optimization algorithms
Experience using git, unit testing, and docker.
Experience writing patent applications and/or grant proposal

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: Quantum Software Engineer
Locations: Madrid, Barcelona
Employment type: Full-time
Workplace type: Hybrid
Seniority level: Associate

About MULTIVERSE COMPUTING

Come and join our multicultural team!

5 locations
+27 languages

Founded in 2019

Coworkers +150

Technical · Madrid, Barcelona

Quantum Software Engineer (Fixed-term contract)

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