Descripción de la oferta
Senior Software Engineer, Cryptography & Key Management
Salary: Up To €90,000
Location: Spain (Remote)
I’m currently working with one of Europe’s fastest-growing sovereign cloud and infrastructure businesses who are looking for their first dedicated Cryptography Engineering hire in Europe to help build the cryptographic foundations behind their next-generation cloud platform.
This is a highly impactful engineering role focused on designing and developing core Key Management and Secrets Management capabilities used across large-scale cloud environments.
You’ll work across applied cryptography, Kubernetes, distributed systems, and cloud-native security engineering, building systems responsible for secure key generation, encryption workflows, lifecycle management, and cryptographic operations at scale.
The business sits within one of Europe’s largest and most financially stable technology groups and has already invested billions into building sovereign cloud infrastructure across Europe. With increasing concerns around data protection, compliance, and dependency on US hyperscalers, the company is experiencing significant growth and is becoming a major player in Europe’s digital sovereignty movement.
This role offers a rare opportunity to come in at the ground floor and shape how cryptography engineering evolves within the organisation long term. You’ll have significant ownership, visibility, and influence across both the platform and future security architecture roadmap.
Responsibilities
- Design and develop Key Management and Secrets Management systems focused on secure key generation, rotation, and lifecycle management.
- Build and optimise cryptographic workflows including envelope encryption and secure key wrapping mechanisms.
- Develop Kubernetes operators to automate deployment, scaling, recovery, and lifecycle management of security services.
- Build and maintain robust REST APIs for key management, signing, verification, and external key integrations.
- Own systems end-to-end within a “You Build It, You Run It” engineering environment.
- Partner closely with security engineering and SRE teams to ensure reliability, scalability, and compliance.
- Ensure cryptographic implementations adhere to modern security standards including AES, RSA, ECDSA, and HMAC.
- Continuously improve platform performance, scalability, auditability, and operational resilience.
Requirements
- Strong software engineering background with deep experience in Go and Kubernetes.
- Hands-on experience building Kubernetes operators and cloud-native infrastructure systems.
- Strong understanding of applied cryptography and secure systems design.
- Experience working with cryptographic algorithms such as AES-GCM, RSA-OAEP, ECDSA, or HMAC.
- Strong understanding of distributed systems, APIs, and infrastructure automation.
- Experience operating production systems within high-security or compliance-driven environments.
- Strong ownership mindset with the ability to work across the full software lifecycle.
This is a great opportunity to join a highly technical engineering environment with strong leadership from globally recognised technology companies, while benefiting from the agility of a fast-growing business combined with the stability and backing of a major enterprise group.
