Senior Security Engineer, Cryptography

Trail of Bits

. Lead cryptographic assessments of protocols, libraries, and application code.

Posted 9/24/2026full-timeRemote • United StatesSenior💰 $165,000 - $220,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in cryptographic assessments, including evaluating protocols and implementations, and possesses strong mathematical fluency for translating research into practical applications. Proficient in systems-oriented programming languages and experienced in leading technical discussions and client engagements.

Highest-signal resume keywords

Cryptographic AssessmentMathematical FluencyRust ProgrammingGit-Based Development WorkflowsTechnical Communication

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Cryptographic PrimitivesSymmetric CryptographyAsymmetric CryptographyPost-Quantum SchemesZero-Knowledge Proof SystemsMulti-Party ComputationCryptanalysisImplementation ReviewCryptographic APIsSecurity Engagement Scoping

Soft Skills

Clear WritingTechnical CommunicationMentoringCollaborationDecision-Making

Certifications & Qualifications

E-Verify Eligibility

Industry Keywords

Threat ModelingTechnical PublicationsOpen-Source ContributionsPrivacy-Preserving SystemsDefensible Engineering Decisions

Tech Stack

Tools & technologies

RustC++Go

About the role

Key responsibilities & impact

Lead cryptographic assessments of protocols, libraries, and application code.
Identify design and implementation weaknesses, validate exploitability, and recommend practical fixes.
Analyze standardized symmetric and asymmetric cryptography, post-quantum schemes, zero-knowledge proof systems, and multi-party computation protocols.
Create or extend tools, test harnesses, and proofs of concept for cryptanalysis and implementation review.
Plan work, surface risk early, lead technical discussions, and produce precise client reports.
Independently lead substantial portions of client engagements as a senior individual contributor.
Contribute to scoping, methodology, mentoring, research, tooling opportunities, open-source projects, technical publications, and presentations.
Collaborate with the Cryptography practice, Assurance team, client engineers, researchers, and other stakeholders.
Lead assessments from initial threat model through client readout.
Help clients make defensible engineering decisions about risk and remediation.

Requirements

What you’ll need

Substantial experience evaluating cryptographic primitives, protocols, and implementations.
Mathematical fluency sufficient to read academic papers, reason about security assumptions, and translate research into implementation-level questions.
Proficiency in at least one systems or security-oriented language such as Rust, Go, C, or C++.
Experience using Git-based development workflows.
Ability to form and test hypotheses, recognize specification/implementation divergence, document evidence, and prioritize findings by real-world impact.
Record of independently driving complex technical work, managing ambiguity, making defensible decisions, and helping teammates improve.
Clear writing and confident technical communication with engineers, researchers, and stakeholders.
Willingness to learn unfamiliar systems and collaborate with colleagues, clients, and the broader technical community.
Experience assessing post-quantum, zero-knowledge, threshold, multiparty-computation, or privacy-preserving systems is nice to have.
Published research, open-source contributions, public audit reports, conference talks, or technical writing is nice to have.
Experience designing cryptographic APIs, reviewing protocol specifications, or moving research implementations toward production use is nice to have.
Experience scoping security engagements, mentoring engineers, or developing repeatable assessment methodologies is nice to have.
Must be eligible for employment verification through E-Verify requirements for U.S.-based employment.

Benefits

Comp & perks

Competitive salary complemented by performance-based bonuses.
Fully company-paid insurance packages, including health, dental, vision, disability, and life.
A solid 401(k) plan with a 5% match of your base salary.
20 days of paid vacation with flexibility for more, adhering to jurisdictional regulations.
4 months of parental leave.
$10,000 in relocation assistance for moving to NYC.
$1,000 Working-from-Home stipend.
Annual $750 Learning & Development stipend.
Company-sponsored all-team celebrations, including travel and accommodation.
Philanthropic contribution matching up to $2,000 annually.