Senior Crypto Security Engineer

Benefits

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Role

Role function

Security From the posting source checked Jun 20, 2026

Seniority

Senior From the posting source checked Jun 20, 2026

Work mode

Remote From the posting source checked Jun 20, 2026

In-office days

0 days From the posting source checked Jun 20, 2026

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About this role

Senior Crypto Security Engineer Los Angeles HQ, Culver City, California, USA, Remote Lightspark is creating the Money Grid, modern, open financial infrastructure that makes payments accessible, affordable, and instant for businesses and users worldwide. We're challenging the status quo, updating the current system, and empowering our partners to build better solutions. Together, we're building the most advanced financial infrastructure, open, instant, and global, inspiring a future where anyone, anywhere can access the full potential of digital money. We are seeking a Senior Security Engineer with a rare combination of deep infrastructure roots, application security expertise, and a sophisticated understanding of blockchain protocols. In this role, you will be architecting the safety of a high-throughput, decentralized payment network. Your expertise spans the entire security spectrum: you have the operational rigor to secure mission-critical infrastructure and the technical depth to audit low-level code, all while maintaining an intuitive grasp of on-chain anomalies and decentralized threat vectors. WHAT YOU'LL BE DOING: - Secure Protocol Engineering: Perform deep-dive code audits and risk assessments of core protocol implementations and payment channel logic. You will prevent funds loss or state corruption by identifying edge cases in distributed systems. - Hardened Infrastructure: Architect and secure our cloud-native footprint (AWS/GCP), ensuring that validator nodes, signing services, and P2P networking are resilient against both traditional DDoS and protocol-specific eclipse attacks. - Application & Lifecycle Security: Build and maintain the Secure SDLC for our products. This includes automated security analysis (SAST/DAST) in CI/CD, managing high-stakes bug bounties, and performing manual

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