Backend Software Engineer (AI Native)

Qrypt's mission is to protect the world's data and restore privacy. Qrypt hardens cybersecurity and future-proofs encryption against quantum attacks by eliminating key transmission. Qrypt's unique technology independently generates symmetric keys at multiple endpoints for critical workflows today. We are a passionate team of engineers, physicists, and cryptographers committed to transforming the way the world safeguards data and communications!

Qrypt is looking for a Backend Software Engineer to build the services behind our quantum security products. You will write and ship backend software — primarily in Rust — that moves quantum entropy and keys, powers our entropy-as-a-service platform, and makes our appliances work reliably at scale. You will use AI-assisted development tooling as a core part of how you work, while owning the correctness and quality of everything you ship.

What you'll do

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Design, build, and test backend services and APIs, primarily in Rust, with some C++ and Python.

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Work on the software that delivers quantum entropy and keys reliably and securely.

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Write well-tested, maintainable code and participate in design and code review.

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Use AI-assisted and agentic development tooling to accelerate your work while owning the correctness and quality of everything you ship.

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Help shape how the team adopts AI-assisted development (instruction conventions, review standards) as the tooling matures.

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Develop an understanding of the domain (quantum random number generation, cryptography, network security) to build and validate our products.

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Collaborate with hardware, product, and other engineers to ship end-to-end.

What you'll need

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Bachelor's degree in Computer Science or a related technical field, and/or relevant work experience.

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3+ years building and shipping backend software.

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Proficiency in Rust, or strong systems-programming experience (C, C++, Go) with a demonstrated ability and eagerness to work primarily in Rust.

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Working familiarity with C++ and Python.

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Solid grasp of backend fundamentals: APIs, services, concurrency, testing, and Linux.

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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.

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Strong written and verbal communication skills.

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Must be authorized to work in the United States. Qrypt does not provide visa sponsorship for this role.

Nice to have

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Experience with cryptography, security, or networking systems.

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Experience with high-reliability or performance-sensitive services.

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Familiarity with Linux systems programming and packaging/deployment.

Benefits & Perks

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