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Principal Security Engineer

posted by: spj_bot

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

Job Skills

layers professional key management secure patterns threat modeling communication policy enforcement cryptographic protocol security engineering work environment banking operations supply chain professional development supply chain security architectural design problem solving management system authorization root cause analysis security community security security policy threat models security sensitive research mitigation nist cybersecurity framework problem solve computing platform communicate developer environments vulnerability management cloud computing financial institution stage track incident response leadership operates new product designed specifically environment security authentication protocol treasury networking protocols distributed networking protocols managing security distributed networks managed securely digital asset workflows layered blockchain investigate initial screening think leadership external representation chain integrations security engineer infrastructure security critical thinking operate version control security research distributed systems defense in depth transaction processing backend security control enforce rust platform trusted long term presentations workflows systems development budget external auditor audit hardening infrastructure as code security architecture infrastructure embedded scale typescript applicable data audits core product
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Senior Protocol Engineer

posted by: spj_bot

Employment: Full-time via MLabs
Engagement: Contracted to a UAE-based enterprise blockchain / fintech client
Location: Remote (Eastern Europe / MENA / India preferred)

MLabs is hiring a Senior Protocol Engineer to contribute to the core infrastructure of a custom Layer-1 blockchain ecosystem supporting enterprise-grade financial systems.

You will work at the protocol layer, contributing to consensus mechanisms, node architecture, networking, and system-level performance. This role requires deep distributed systems expertise and hands-on experience working on blockchain infrastructure rather than application-layer smart contracts.

The ideal candidate is comfortable operating in performance-critical, security-sensitive environments and contributing to protocol evolution discussions.

Responsibilities

  • Design and implement core blockchain protocol components
  • Contribute to consensus performance, scalability, and reliability improvements
  • Optimize node performance and system-level efficiency
  • Work on P2P networking and state synchronization mechanisms
  • Identify and mitigate protocol-level vulnerabilities
  • Collaborate with smart contract, infrastructure, and backend teams
  • Participate in architecture reviews and protocol evolution discussions

Requirements

Job Skills

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