Backend Software Engineer
Qrypt
Backend Software Engineer
Qrypt
Quantum-resistant encryption SDK for developers
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.
Design, build, and test backend services and APIs, primarily in Rust, with some C++ and Python.
Work on the software that delivers quantum entropy and keys reliably and securely.
Write well-tested, maintainable code and participate in design and code review.
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 an understanding of the domain (quantum random number generation, cryptography, network security) to build and validate our products.
Collaborate with hardware, product, and other engineers to ship end-to-end.
Bachelor's degree in Computer Science or a related technical field, and/or relevant work experience.
3+ years building and shipping backend software.
Proficiency in Rust, or strong systems-programming experience (C, C++, Go) with a demonstrated ability and eagerness to work primarily in Rust.
Working familiarity with C++ and Python.
Solid grasp of backend fundamentals: APIs, services, concurrency, testing, 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.
Strong written and verbal communication skills.
Must be authorized to work in the United States. Qrypt does not provide visa sponsorship for this role.
Experience with cryptography, security, or networking systems.
Experience with high-reliability or performance-sensitive services.
Familiarity with Linux systems programming and packaging/deployment.
Competitive Pay & Equity participation
Comprehensive health, dental and vision coverage
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!
Equal Opportunity Employer
Qrypt is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, disability, age, or veteran status. If you have a disability and need assistance with our employment application process, please email us at [email protected] to obtain assistance.
Qrypt provides software-based post-quantum data encryption through an SDK that developers and organizations can integrate into their apps to guard data against future quantum threats. The SDK includes quantum-resistant cryptographic primitives and guided integration to add quantum-safe protection without rebuilding existing systems, plus extensive documentation. It differentiates itself through exclusive partnerships with quantum hardware companies and premier research institutes, enabling claims of long-term data security and alignment with cutting-edge quantum cryptography. Its goal is to help various sectors—finance, healthcare, government, and tech—maintain data privacy in the quantum era by delivering practical, scalable quantum-resistant security.
Explore more opportunities at Qrypt