Cryptography Engineer

About Multiverse Computing

Multiverse is a well-funded, fast-growing deep-tech company founded in 2019. We are the largest quantum software company in the EU and have been recognized by CB Insights (2023 and 2025) as one of the 100 most promising AI companies in the world.

With 180+ employees and growing, our team is fully multicultural and international. We deliver hyper-efficient software for companies seeking a competitive edge through quantum computing and artificial intelligence.
Our flagship products, CompactifAI and Singularity, address critical needs across various industries:

• CompactifAI is a groundbreaking compression tool for foundational AI models based on Tensor Networks. It enables the compression of large AI systems—such as language models—to make them significantly more efficient and portable.
• Singularity is a quantum- and quantum-inspired optimization platform used by blue-chip companies to solve complex problems in finance, energy, manufacturing, and beyond. It integrates seamlessly with existing systems and delivers immediate performance gains on classical and quantum hardware.

You’ll be working alongside world-leading experts to develop solutions that tackle real-world challenges. We’re looking for passionate individuals eager to grow in an ethics-driven environment that values sustainability and diversity.

We’re committed to building a truly inclusive culture—come and join us.

Position

As a Cryptography Engineer, 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

Responsibilities

• Participate and lead projects with customers to design and implement Post-Quantum Cryptography and cybersecurity solutions
• Take engineering projects from concept and design to production, while working with other engineering teams and our software team
• Implement, test, and deploy/integrate cryptographic protocols and libraries to our software solutions

Your qualification

• Master Degree in Computer Science, Mathematics, Physics, Engineering or related field

• 3+ years of professional software engineering experience or equivalent cryptography development experience

• Background in cryptography and good understanding of network security protocols such as TLS

• Knowledge of Python

• Ability to work with a diverse team of people, both in-person and through online resources

• Perfect command of the English language

Will be a plus

• PhD in Mathematics, Computer Science, Physics, Engineering or related field with focus on cryptography

• Knowledge of post-quantum cryptography, quantum key distribution, quantum algorithms

• Knowledge in C and C++ programming

• Experience using git and docker

• Basic knowledge of cloud infrastructure, such as AWS, Azure, GCP

• Knowledge of APIs

What we offer

• Indefinite contract
• Equal pay guaranteed
• Variable performance bonus
• Signing bonus
• Relocation package (if applicable)
• Opportunity to be part of the phantom shares programme
• Private health insurance
• Hybrid opportunity
• Flexible working hours
• Holidays: 23 working days plus 14 public holidays (2023)
• Language classes and discounted lunch options
• Working in a high paced environment, working on cutting edge technologies
• Career plan. Opportunity to learn and teach
• Progressive Company. Happy people culture