Cryptographer

Plasma AI; New York (NY); Presencial; USD 140.000 - 230.000; Jornada completa

Descripción de la vacante

Plasma is seeking a cryptographer to design and build verifiable cryptography that shows who authorized an agent, what it was allowed to do, and what it did. You will craft protocols and ship code implementing them, addressing delegation of authority, and persisting agent identities within Plasma's audit trail.

The role blends research and product work: you will review cryptographic protocols across the platform and implement them with attention to side channels and secure deployment practices.

Formación

• Graduate training or research in cryptography or equivalent production experience.
• Experience with digital signatures and hash-based structures like Merkle trees.
• Experience shipping cryptographic systems in production using Rust, Go, or C++.

Responsabilidades

• Verifiable Audit Trails: design tamper-evident logs for audit checks.
• Delegated Authority: build revocable credentials for limited agent permissions.
• Agent Identity: create persistent identities checked by services.
• Key Management: design generation, storage, rotation, and revocation of keys.
• Review: assess cryptographic protocols and implementations across Plasma.

Conocimientos

Crypto research

Digital signatures

Merkle trees

Delegated auth

Rust/Go/C++

Educación

Graduate degree in cryptography

Herramientas

HSMs

Cloud KMS

Secure enclaves

Descripción del empleo

We're looking for a cryptographer to make Plasma's records and permissions verifiable. You'll design and build the cryptography that shows who authorized an agent, what it was allowed to do, and what it did.

You design the protocols and ship the code that implements them. The role is both research and product: problems like delegating limited authority to agents are still open, and your answers ship into Plasma's audit trail.

What You'll Work On

• Verifiable Audit Trails: Design tamper-evident logs, so anyone reviewing an agent's work can check that no entry was changed or removed
• Delegated Authority: Build credentials that let a person grant an agent limited, revocable permissions, and let that agent pass narrower permissions to others
• Agent Identity: Give each agent an identity that persists between runs and that other agents and services can check
• Key Management: Design how keys are generated, stored, rotated, and revoked
• Review: Review cryptographic protocols and implementations across the platform

What We're Looking For

• Graduate training or research in cryptography, or equivalent experience shipping cryptographic systems
• Experience with digital signatures, hash-based structures such as Merkle trees and transparency logs, and delegated authorization
• Experience implementing cryptography in production in a language such as Rust, Go, or C++, with attention to side channels and misuse
• Familiarity with HSMs, cloud key management, or secure enclaves
• Interest in zero-knowledge proofs or verifiable computation is a plus