Cryptography Engineer

Seceq; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Remote work

Job summary

Seceq is seeking a cryptography-focused engineer to design and implement cryptographic primitives in Rust, with emphasis on cross-architecture performance and resistance to side-channel attacks.

You will contribute to post-quantum research, review security-critical code, prepare technical documentation, and participate in security audits of cryptographic systems. This is a full-time remote role.

Qualifications

• Three+ years of systems programming in Rust, C, or C++.
• Strong foundations in cryptography and mathematics.
• Deep understanding of symmetric and asymmetric cryptography.

Responsibilities

• Implement cryptographic algorithms in Rust.
• Optimize implementations for CPU architectures (x86, ARM).
• Develop constant-time code and mitigate side-channel risks.
• Contribute to post-quantum cryptography research and implementations.
• Review code and participate in security audits of cryptographic systems.
• Prepare technical documentation and contribute to research papers.

Skills

Cryptography

Math foundations

Rust/C/C++

Side-channel awareness

SIMD/intrinsics

Tools

Rust

C/C++

SIMD

Intrinsics

Job description

Role overview

Design and implement cryptographic primitives, with a focus on performance across processor architectures and resistance to side-channel attacks. The work includes contributing to post-quantum research, reviewing security-critical code, and documenting technical findings.

Responsibilities

• Implement cryptographic algorithms in Rust.
• Optimize implementations for CPU architectures such as x86 and ARM.
• Develop constant-time code and account for side-channel attack risks.
• Contribute to post-quantum cryptography research and implementation.
• Review code and participate in security audits of cryptographic systems.
• Prepare technical documentation and contribute to research papers.

Requirements

• Strong foundations in cryptography and mathematics.
• At least three years of systems programming experience in Rust, C, or C++.
• Deep understanding of symmetric and asymmetric cryptography.
• Familiarity with side-channel attacks and countermeasures.
• Experience with processor-specific optimization, such as SIMD or intrinsics.

Nice to have

• Experience with post-quantum algorithms such as ML-DSA or ML-KEM.
• Contributions to open-source cryptography projects or published security research.
• Familiarity with formal verification tools or zero-knowledge proof systems.

Benefits and work setup

Full-time role with remote work available; the listed locations are Milan and Prague.