Software Engineer- Cybersecurity and Cryptography

The role

You will lead the development of production-grade ground segment software. You will architect and implement cryptographic foundations to protect the satellite constellation and data moving between Earth and orbit.

What you will do

• Design and implement production-ready cryptographic modules for key management, IAM, and secure communication protocols.
• Apply defensive programming techniques to eliminate vulnerabilities and ensure software resilience.
• Develop secure data-at-rest solutions for persistent memory architectures.
• Lead the development of high-availability ground station software.
• Integrate Hardware Security Modules and Trusted Platform Modules into ground infrastructure.

Required qualifications

• 5+ years of software engineering experience with a heavy focus on security-sensitive applications.
• Mastery of C/C++ with a focus on memory-safe patterns and defensive coding standards.
• Proficiency in Python for security tooling.
• Direct experience programming for persistent memory or non-volatile storage.
• Deep understanding of symmetric/asymmetric encryption, digital signatures, hashing, and Public Key Infrastructure (PKI).
• Hands-on experience with Cloud Security (AWS), Kubernetes security, and automated CI/CD security scanning (SAST/DAST).

Nice to have

• Experience with Satellite Ground Segment software or aerospace communications.
• Knowledge of Post-Quantum Cryptography (PQC) standards.
• Familiarity with hardware-level security and side-channel attack mitigation.
• Experience implementing Zero Trust architecture in hybrid-cloud environments.

Before you apply

• For U.S. Roles: applicant must be a U.S. citizen, lawful permanent resident of the United States, or other protected individual.
• For U.K. Roles: requires Baseline Personnel Security Standard (BPSS) checks and eligibility to obtain UK Security Clearance (SC).
• For Canada Roles: must obtain and hold a security clearance at the reliability status level and pass security assessment for the Canadian Controlled Goods Program (CGP) and ITAR.

About the company

Xona is the navigational intelligence company bringing real-time, centimeter-level certainty to any device, anywhere on Earth. With Pulsar, Xona will offer a future-proof, backwards-compatible global positioning system.