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).

Up to 9-month contract, ending on 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.

About the Role

We are seeking a proactive and technically skilled Product Support Engineer to join our team on a temporary basis (contract) and provide customer-facing technical support for our compressed Large Language Models (LLMs) and API services.

You will be the first point of contact for technical inquiries, troubleshooting, and guidance, helping customers maximize value from our AI solutions. This is a unique opportunity to work with cutting-edge AI technology, ensure high customer satisfaction, and contribute to the success of a major new initiative.

As a Product Support Engineer, you will:

Become an expert in all Multiverse Computing’s products
Provide first-line technical support with a variety of complexity, from simple billing or account questions for individuals to complex, incident-level issues and debugging
Investigate and resolve customer-reported issues by reproducing problems and identifying root causes.
Collaborate with engineering teams to escalate and resolve complex technical problems.
Assist customers with API integration, usage, and best practices for performance and reliability.
Document common issues, solutions, and best practices in a customer knowledge base.
Communicate clearly and empathetically with customers, ensuring high satisfaction and trust.

Required Qualifications

Strong technical background with experience in troubleshooting APIs, SDKs, or software integrations.
Familiarity with AI/ML concepts, particularly Large Language Models and model deployment.
Proficiency in Python and experience with APIs.
Excellent communication and problem-solving skills; able to explain technical concepts to non-technical users.
Bachelor’s degree in Computer Science, Engineering, or related field; or equivalent practical experience.

Preferred Qualifications (Nice-to have)

Experience supporting AI/ML products or developer-focused platforms.
Knowledge of model compression techniques and performance optimization.
Contributions to documentation, tutorials, or developer community forums.
Experience using ticketing and support tools (e.g., Zendesk, Jira, or similar).

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
Locations: Madrid, Barcelona
Employment type: Contract
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

Product Support Engineer (AI/LLM) (9-month contract with bonus incentives)

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