Fullstack Engineer (Fixed-term contract)
MULTIVERSE COMPUTINGMadrid, Community of Madrid, Spain • Barcelona, Catalonia, Spain
Posted November 7, 2025
45000 - 45000 EUR year
Contract / Temporary
About the Company
Multiverse Computing is the leading quantum AI software company. We apply quantum and quantum-inspired AI to solve complex problems in finance, energy, manufacturing, defense, cybersecurity, life sciences, and chemistry, delivering practical applications and tangible value today. We provide hyper-efficient software to companies wanting to gain an edge with quantum computing and artificial intelligence. One of our flagship products is Singularity, a software platform that contains quantum and quantum-inspired algorithms developed and patented through proof-of-concept trials we have been performing for industrial and service clients. Our other product CompactifAI, is an AI model compression tool that reduces AI model size while maintaining performance, leading to lower energy consumption and costs. CompactifAI is ideal for real-time processing and edge computing applications. It has been adopted by enterprises in healthcare, automotive, and telecommunications, showcasing its versatility and impact. Multiverse Computing applies these cutting edge technologies to provide companies a chance to derive value from the quantum AI revolution.
Job Description
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.”
Requirements
- 2–5 years of experience across frontend and backend development
- Proficient with React/Next.js and TypeScript on the frontend, plus Python (FastAPI/Django) on the backend
- Experience building data-intensive dashboards, experiment tracking UIs, or internal automation tools
- Strong understanding of API design, data modeling, and frontend–backend integration
- Experience with SQL databases, containerized development (Docker), and CI/CD pipelines
- Experience with AWS or cloud-based deployment environments
Benefits
- 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
- Equal pay guaranteed
- International exposure in a multicultural, cutting-edge environment
