Senior Backend Software Engineer (AI Native)

About the role

Qrypt is looking for a Senior Backend Software Engineer to own the services behind our quantum security products. You will lead the design and development of backend software — primarily in Rust — that moves quantum entropy and keys, powers our entropy-as-a-service platform, and makes our appliances work reliably and securely at scale. You will use AI-assisted development tooling as a core part of how you work, own the correctness and quality of what ships, and help set how the team engineers in an AI-native way.

Responsibilities

• Lead the design, development, and testing of backend services and APIs, primarily in Rust, with some C++ and Python.
• Own significant parts of the backend end to end: architecture, implementation, reliability, and performance.
• Make and document design tradeoffs; raise the bar on code quality, testing, and review across the team.
• Work close to the metal on the software that delivers quantum entropy and keys reliably and securely.
• Use AI-assisted and agentic development tooling to accelerate your work while owning the correctness and quality of everything you ship.
• Help shape how the team adopts AI-assisted development (instruction conventions, review standards) as the tooling matures.
• Develop deep domain understanding (quantum random number generation, cryptography, network security) to architect and validate our products.
• Mentor other engineers and collaborate across hardware, product, and engineering to ship end-to-end.

Requirements

• Bachelor's degree in Computer Science or a related technical field, and/or relevant work experience.
• 6+ years building and shipping backend software, including ownership of services end to end.
• Expertise in Rust, or deep systems-programming experience (C, C++, Go) with a demonstrated ability to work primarily in Rust at a senior level.
• Working proficiency with C++ and Python.
• Strong command of backend architecture: APIs, services, concurrency, reliability, performance, and Linux.
• Fluency with AI and agent-assisted development, and the judgment to apply it where it adds real leverage — reviewing, correcting, and taking full ownership of AI-generated work. This is core to how we operate at Qrypt and is expected of everyone here.
• A track record of technical leadership: design decisions, mentoring, and raising engineering standards.
• Strong written and verbal communication skills.
• Must be authorized to work in the United States. Qrypt does not provide visa sponsorship for this role.

Nice to have

• Experience with cryptography, security, or networking systems.
• Experience designing high-reliability, high-assurance, or performance-sensitive services.
• Familiarity with Linux systems programming, packaging, and deployment.

Benefits

• Competitive Pay & Equity participation
• Comprehensive health, dental and vision coverage
• Strong 401(k) match
• In-office lunch and snacks
• The opportunity to be part of a company solving one of the most critical technology challenges of our time!