Location: Remote - US or EU
Remote | Full-time
Compensation: $160K - $240K

Our client operates a core banking platform designed specifically for digital assets, enabling fintechs and systemically important financial institutions to build, operate, and scale onchain infrastructure. The platform secures over €100B in assets and powers critical operations—including key management, transaction processing, treasury, and compliance—for over 400 global institutions.
Our client is seeking a Principal Security Engineer to lead product security across the entire ecosystem. In this role, security is built directly into the system's architecture rather than applied as a secondary control. The ideal candidate will take ownership of hardening key management, signing workflows, authentication systems, policy enforcement, and multi-chain integrations.
Beyond core product security and vulnerability management, this position plays a pivotal role in shaping the long-term architectural vision of a platform trusted by tier-one financial institutions. As an organization committed to technical excellence, our client also encourages contribution to the broader security community through research, publications, and industry events.

Key Responsibilities

• Architectural Leadership: Lead product security architecture, ensuring security principles are embedded into core platform design and development cycles.

• Core Infrastructure Security: Analyze and secure key management systems, transaction pipelines, and signing workflows across modern distributed networks.

• Threat Modeling & Review: Perform system-level threat modeling for new product features, protocols, and multi-chain integrations.

• Cryptographic & Auth Security: Design and evaluate security-sensitive components, including authentication protocols, authorization frameworks, and applied cryptographic workflows.

• Defense-in-Depth: Define, implement, and maintain multi-layered security controls across the application, infrastructure, and protocol layers.

• Supply Chain & Environment Security: Own and expand end-to-end software supply-chain security, spanning dependency scanning in CI pipelines to local developer environments.

• Infrastructure as Code (IaC): Enforce security configurations into version-controlled repositories to prevent configuration drift and enhance auditability.

• Risk Research & Mitigation: Investigate emerging security risks related to blockchain protocols, institutional custody models, and novel cryptographic techniques.

• Compliance & Audits: Support ongoing SOC 2, ISO 27001, and ISO 22301 compliance frameworks alongside expanding control surfaces.

• Technical Enablement & Incident Response: Provide day-to-day guidance to engineering teams to make secure patterns accessible, while supporting incident response and root-cause analysis when necessary.

• External Representation: Participate in security architecture reviews with tier-one banking partners, external auditors, and enterprise clients.

• Industry Thought Leadership: Contribute to technical research, whitepapers, and conference presentations to advance the digital asset security field.

Requirements

• Experience: 10+ years in security engineering, product security, or security architecture roles.

• Domain Expertise: Demonstrated track record of securing financial infrastructure, institutional blockchain platforms, or both.

• Cryptographic Systems: Deep understanding of cryptographic protocols, wallet architectures, and key management frameworks. Direct experience with Multi-Party Computation (MPC), threshold signatures, or HSM-backed solutions is strongly preferred.

• Threat Modeling: Extensive experience performing comprehensive system-level threat models and architecture reviews.

• Infrastructure & Networks: Solid foundational knowledge of distributed systems, networking protocols, and cloud computing platforms (primarily AWS).

• Supply Chain & IaC: Hands-on experience implementing software supply-chain defenses and managing security configurations via code to prevent drift.

• Compliance & Frameworks: Familiarity with maintaining live audit cycles for frameworks such as SOC 2, ISO 27001, ISO 22301, and the NIST Cybersecurity Framework.

• Development Skills: Professional familiarity with modern backend languages such as Rust or TypeScript.

• Communication: Exceptional ability to communicate complex security concepts effectively to both internal engineering teams and external enterprise stakeholders.

Benefits

• Competitive executive-level compensation package.

• Flexible, remote-first work environment.

• Comprehensive health, wellness, and benefits coverage tailored to regional standards.

• Generous paid time off (PTO) and personal Leave policy.

• Professional development budget for security research, certifications, and industry conferences.

• Exposure to cutting-edge cryptographic engineering alongside leading global financial institutions.


Interview Process
The selection process for this position consists of the following structured phases:

• Initial Screening Call (30 mins): Introductory discussion with the Co-CEO to align on background, expectations, and role scope.

• Cognitive & Skills Assessment (45 mins): A series of brief, timed assessments via TestGorilla evaluating:

• Critical Thinking

• Verbal Reasoning

• Attention to Detail (Textual)

• Numerical Reasoning

• Problem Solving

• (Note: Practice questions are provided prior to each timed 10-minute section).

• Take-Home Technical Exercise: A practical assignment designed to assess technical problem-solving and architectural design capabilities.

• Group Technical Interview (120 mins): A multi-part panel review covering:

• Threat modeling exercise

• Infrastructure security review

• Cultural alignment assessment

• Final Leadership Interview: A concluding conversation prior to the formal offer stage.

Due to the high volume of applications we anticipate, we regret that we are una