Senior Backend Engineer: AI-Native Rust Quantum Security

Qrypt; Austin (TX); On-site; USD 180,000 - 260,000; Full time

Benefits offered by this job

Competitive pay

Equity participation

Health coverage

401(k) match

In-office meals

Job summary

Qrypt is seeking a Senior Backend Software Engineer to own the services behind our quantum security products. You will design and develop backend software—primarily in Rust—handling entropy and keys, powering our entropy-as-a-service platform, and ensuring scalable, secure operation.

You will mentor engineers, collaborate across hardware and product teams, and shape how the team uses AI-assisted development while maintaining high code quality and reliability.

Qualifications

• Bachelor's degree in CS or related field or equivalent experience.
• 6+ years building and shipping backend software, with end-to-end ownership.
• Expertise in Rust or deep systems-programming with Rust focus.
• Proficiency in C++ and Python; Linux proficiency.
• Strong backend architecture knowledge: APIs, services, concurrency, reliability.

Responsibilities

• Lead design, development, and testing of backend services and APIs, primarily in Rust.
• Own significant parts of the backend end-to-end: architecture, implementation, reliability, performance.
• Document design tradeoffs and elevate code quality, testing, and review.
• Work close to the metal to ensure secure, reliable entropy delivery.
• Leverage AI-assisted tooling while ensuring correctness of all shipped work.
• Mentor engineers and collaborate with hardware, product, and engineering teams.

Skills

Rust expertise

Backend architecture

Mentorship

AI-assisted development

Education

Bachelor's degree in CS or related

Tools

Rust

C++

Python

Go

Job description

Qrypt is seeking a Senior Backend Software Engineer to own the services behind our quantum security products. You will design and develop backend software—primarily in Rust—handling entropy and keys, powering our entropy-as-a-service platform, and ensuring scalable, secure operation.

You will mentor engineers, collaborate across hardware and product teams, and shape how the team uses AI-assisted development while maintaining high code quality and reliability.