Staff Product Security Engineer

DFNS; Paris; À distance; EUR 136 000 - 226 000; Plein temps

Avantages offerts par ce poste

MacBook provided

Stock options (4-year vesting)

Healthcare

Flexible vacation

Parental leave

Home technology allowance

Travel expenses covered

Remote first

Résumé du poste

DFNS is seeking a Staff Product Security Engineer to own the security of the platform from threat modeling to incident response. You will integrate automated security gates into CI/CD, lead vulnerability management, and oversee external pentests and audits with client security teams.

You should be hands-on with TypeScript and Rust (or Go), plus deep AWS security experience and strong communication with engineers and CISOs.

Qualifications

• Hands-on application security on production systems handling money or sensitive data.
• Ability to read/write TypeScript and Rust (or Go) to review and fix security issues.
• Experience building security into CI/CD with SAST/DAST, dependency and supply chain controls and secrets management.
• Applied cryptography fluency; understanding keys, signatures, TLS and PKI in practice.
• Cloud security on AWS including IAM, networking and KMS or Nitro Enclaves.
• Experience running pentests or a bug bounty and leading incident response.
• Communication with engineers and external security teams such as bank CISOs and auditors.

Responsabilités

• Own product security across the platform from threat modeling and design reviews to code review and dynamic testing.
• Build the secure development lifecycle into CI/CD with automated gates (SAST/DAST, SBOM, signing, provenance) and secrets scanning.
• Lead vulnerability management including triage, prioritization, fixes, and security releases with Engineering.
• Run external pentests and the bug bounty program and collaborate with researchers.
• Lead incident response for product security events from detection through post-mortems and controls.
• Represent security in client due diligence and audits, including security questionnaires and architecture sessions.
• Raise the bar for engineers via secure coding guidance and reusable security patterns.

Connaissances

TypeScript

Rust

Go

Threat modeling

Code review

SAST/DAST

CI/CD security

Cryptography

AWS security

Incident response

Outils

AWS

KMS

HSMs

SBOM

CI/CD tooling

Description du poste

Staff Product Security Engineer

United States, remote first with NY office available · Full-time · Security · Reports to CISO

About DFNS

Finance is moving onchain. Stablecoins, tokenized deposits, securities and funds are changing how money and assets are issued, held and transferred. The destination is a financial system where any asset can be issued, moved and governed onchain with the controls regulated institutions require. That shift needs a new foundation. Just as core banking systems manage accounts and ledgers today, financial institutions need a platform to manage digital assets. DFNS is that platform. Today, we secure hundreds of billions of dollars in assets every month for more than 500 clients worldwide.

Why this role

Our platform secures a lot of value. Every code path, dependency and deployment is a potential route to that value. The record we are protecting is zero breaches. You will own the security of the product itself, from threat models and architecture reviews to the secure development lifecycle, pentests, bug bounty and incident response. In year one you will put automated security gates into CI/CD, threat model the signing path and the governance model end to end and become the engineer our clients’ security teams want in the room during due diligence.

What you’ll do

• Own product security across the platform, from threat modeling and design reviews to code review and dynamic testing.

• Build the secure development lifecycle into CI/CD, with SAST and DAST, dependency and supply chain controls (SBOM, signing, provenance) and secrets scanning running as automated gates.

• Lead vulnerability management for the product, from triage and prioritization to fix verification and security releases, with Engineering.

• Run the external pentest program and the bug bounty, and work directly with researchers.

• Lead incident response for product security events, from detection and containment to forensics, post-mortems and the controls that follow.

• Represent our security in client due diligence and audits, from security questionnaires and pentest reports to architecture sessions with bank security teams.

• Raise the bar for every engineer through secure coding guidance, training and reusable security patterns and libraries.

What you bring

Must-haves

• Hands-on application security on production systems that handle money or sensitive data, including threat modeling, code review and finding and fixing real vulnerabilities.

• Ability to read and write TypeScript and Rust (or Go) well enough to review and fix security issues yourself.

• Experience building security into CI/CD, including SAST and DAST, dependency and supply chain controls and secrets management.

• Applied cryptography fluency. You know how keys, signatures, TLS and PKI get misused in practice and you can review an MPC or HSM integration without designing the protocol yourself.

• Cloud security on AWS, including IAM, networking and KMS or Nitro Enclaves.

• Experience running pentests or a bug bounty and leading incident response.

• Communication that works with engineers and with external security teams such as bank CISOs and auditors.

Nice-to-haves

• Smart contract security on EVM or Solana.

• Experience with MPC or threshold signature systems, or with HSMs.

• Published research, CVEs or conference talks.

• Experience producing SOC 2 or ISO 27001 evidence for secure development controls.

How we work

We are a distributed company headquartered in Paris. Our teams work from Europe, the US and Asia, with offices in New York, Geneva, Dubai, Singapore, Hong Kong and São Paulo. We write decisions down so they survive time zones. We hold our own work to the standards our clients are held to. We hire people who can own an outcome end to end and we give them the room to do it.

What we offer

A competitive base salary set by role and location, a bonus or variable plan where the role carries one and stock options vesting over four years. Healthcare, flexible vacation, parental leave and a one-time home technology allowance, with travel expenses covered. A MacBook and the equipment you need to do your best work. Remote first, with an office if you want one.

Base salary range: $150,000-250,000

Hiring process

We aim to complete the process in 2 weeks and we tell you where you stand after every step.

• Intro call with Co-CEO (30 minutes).

• Personality and cognitive assessments, completed on your own time (45 minutes).

• A technical take-home exercise

• Focus Interviews (about 3 hours): CISO (30 minutes), technical exercise (45 minutes), general security (45 minutes), design security (45 minutes) and culture fit (30 minutes).

• Reference calls and background checks.

Equal opportunity

DFNS is an equal opportunity employer and considers every applicant based on ability and potential, regardless of race, color, religion, sex, gender identity or expression, sexual orientation, national origin, disability, age or any other characteristic protected by law. If you need an accommodation at any point in the process, tell us and we will arrange it.