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About the Role

Lead product security across the platform, making security an inherent property of the architecture. Design new security capabilities, harden critical systems, and shape the long-term security architecture for a platform used by regulated institutions. Contribute to the security field through research, technical writing, and conference talks.

Responsibilities

• Lead product security architecture across the platform, ensuring security is embedded into core system design.
• Analyze and secure the platform's key management, signing workflows, and transaction pipelines.
• Conduct system-level threat modeling for new features, protocols, and blockchain integrations.
• Design and review security-sensitive components such as auth systems, authorization models, and cryptographic workflows.
• Define and implement defense-in-depth controls across application, infrastructure, and protocol layers.
• Own and expand software supply-chain security, from dependency scanning in CI to package scanning on developer laptops.
• Drive infrastructure and security configuration into version-controlled code in GitHub to eliminate configuration drift.
• Work with engineering teams to ensure secure design decisions during product development and architectural planning.
• Investigate emerging risks across blockchain protocols, custody models, and cryptographic systems.
• Support ongoing SOC 2, ISO, and certification work as the platform's control surface grows.
• Support incident response and root-cause analysis for security-critical events.
• Provide day-to-day security support to developers, making the secure path the easy path.
• Represent DFNS in security architecture reviews with tier-one banks, auditors, and partners.
• Contribute to security research and knowledge sharing through articles, talks, or technical publications.

Requirements

• 10+ years of experience in security engineering, product security, or security architecture.
• Experience securing financial infrastructure or blockchain platforms, ideally both.
• Strong understanding of cryptographic systems, wallet architectures, and key management models.
• Familiarity with MPC, threshold signatures, or HSM-backed key management is a strong advantage.
• Experience performing system-level threat modeling and security architecture reviews.
• Solid knowledge of distributed systems, networking protocols, and cloud infrastructure (AWS).
• Experience with software supply-chain security, package scanning, securing the dev environment end to end.
• Experience managing security and infrastructure configuration as code, with an eye for drift prevention.
• Familiarity with maintaining SOC 2, ISO 27001, ISO 22301, and related certifications in a live audit cycle.
• Knowledge of industry security frameworks such as the NIST Cybersecurity Framework.
• Strong understanding of authentication systems, authorization models, and applied cryptography.
• Experience working with modern backend languages such as TypeScript or Rust.
• Clear communicator able to translate complex security risks into practical engineering decisions.

Skills

• Security Engineering
• Product Security
• Security Architecture
• Cryptographic Systems
• Wallet Architectures
• Key Management
• MPC
• Threshold Signatures
• HSM-backed Key Management
• System-level Threat Modeling
• Security Architecture Reviews
• Distributed Systems
• Networking Protocols
• Cloud Infrastructure (AWS)
• Software Supply-Chain Security
• Package Scanning
• Configuration as Code
• SOC 2
• ISO 27001
• ISO 22301
• NIST Cybersecurity Framework
• Authentication Systems
• Authorization Models
• Applied Cryptography
• TypeScript
• Rust

Location

• US (remote-first)
• EU (remote-first)

Work Type

• Full-time
• Remote-first

Experience Level

• Principal

Salary/Compensations

• $140,000–240,000 per year

Benefits

• Healthcare
• Travel expenses
• 100–300 stock options vested over 4 years

About the Company

• DFNS is the core banking platform for digital assets.
• Since 2020, DFNS has helped fintechs and institutions build and operate onchain, with the security and reliability expected of systemically important firms.
• The platform brings together everything required to run digital asset operations: wallets and key management, transaction processing, treasury, identity and access, policy and workflow orchestration, compliance integrations, and connectivity across 100+ blockchains.
• More than 400 institutions and fintechs run on DFNS, including Standard Chartered, First Abu Dhabi Bank, IBM, Broadridge, Apex Group, Stripe, Post Finance, Circle, and Susquehanna.
• The platform secures over €100B in assets and settles roughly 1% of global stablecoin volume.