Cryptography Engineer

Multiverse Computing; Donostia/San Sebastián; Híbrido; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A leading quantum software firm in San Sebastián seeks a Cryptography Engineer to develop cutting-edge solutions and contribute to a growing team. This role requires a Master's degree and a strong background in cryptography, preferably with 2+ years of industry experience. The company emphasizes an inclusive culture and offers hybrid work options, competitive pay, and additional perks such as performance bonuses and health insurance.

Servicios

Indefinite contract

Equal pay guaranteed

Variable performance bonus

Signing bonus

Work visa sponsorship

Relocation package

Private health insurance

Flexible remuneration

Educational budget eligibility

Hybrid opportunity

Flexible working hours

Language classes

Discounted lunch options

Career plan opportunities

Progressive company culture

Formación

• 2+ years of experience in cybersecurity/cryptography roles.
• Knowledge of symmetric and public-key cryptography.
• Ability to work in diverse teams both in-person and online.

Responsabilidades

• Develop solutions to tackle real-world challenges.
• Contribute to designing and improving the codebase.
• Work with Fortune-500 customers.

Conocimientos

Cryptography

Python

Collaborative work

Communication (English)

Educación

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

Herramientas

Git

Docker

Descripción del empleo

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.

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.
  
  
  

Required Qualifications

• Master Degree in Mathematics, Computer Science, Physics, Engineering or related field.
• Background in cryptography, including symmetric and public-key cryptography.
• 2+ years of experience in industry related to cybersecurity/cryptography roles.
• 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.
  
  
  

Preferred Qualifications

• PhD in Mathematics, Computer Science, Physics, Engineering or related field, with focus on cryptography.
• Experience with practical development and implementation of cryptographic solutions.
• Knowledge of quantum algorithms, quantum key distribution. Post-quantum cryptography.
• Experience using git, unit testing, and docker.
  
  
  

Perks & Benefits

• Indefinite contract.
• Equal pay guaranteed.
• Variable performance bonus.
• Signing bonus.
• We offer work visa sponsorship (If applicable).
• Relocation package (if applicable).
• Private health insurance.
• Flexible remuneration: hospitality and public transportation.
• Eligibility for educational budget according to internal policy.
• Hybrid opportunity.
• Flexible working hours.
• 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
  
  
  

As an equal opportunity employer, Multiverse Computing is committed to building an inclusive workplace. The company welcomes people from all different backgrounds, including age, citizenship, ethnic and racial origins, gender identities, individuals with disabilities, marital status, religions and ideologies, and sexual orientations to apply.

Come and join our multicultural team!

5 locations

+27 languages