Nansen - Senior Security Engineer
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Requirements
• Strong understanding of cloud security (AWS, GCP, or similar), container security, and network security fundamentals. • Hands-on experience implementing and operating security tools (SIEM, vulnerability scanners, endpoint protection, cloud security tooling). • Experience with secrets management, key management, and encryption best practices. • Experience securing AI/LLM tooling, agent-based systems, and modern developer platforms. • Familiarity with securing CI/CD pipelines and developer tooling. • Solid understanding of compliance frameworks (SOC 2, ISO 27001, or similar). • Proficiency with AI-powered tools in day-to-day work, with a drive to find the best balance between productivity and security. • Clear written and verbal communication skills, suited for a remote-first, async environment. • A pragmatic, hands-on mindset — comfortable working across security domains rather than specializing narrowly. • Experience securing blockchain systems, smart contracts, or staking infrastructure. • Experience with Kubernetes and infrastructure-as-code security (Terraform). • Background in incident response or security operations. • Interest in or experience with the crypto/Web3 space. • How We Work • We're remote-first, with async communication as the default and purposeful use of video calls. • remote-first • We work across time zones, with EMEA working hours preferred for this role to overlap with the Head of Security and core engineering teams. • EMEA working hours • We use Slack and structured documentation to keep everyone aligned and empowered. • Slack • You'll join a high-autonomy team where engineers are trusted to take initiative, propose ideas, and ship great work.
Responsibilities
• Conduct security reviews of systems, architectures, and code — proactively identifying and addressing vulnerabilities. • Serve as a go-to security advisor for engineering teams, helping them make secure design decisions. • Define and implement security standards across cloud infrastructure, applications, and blockchain systems. • Implement and maintain security tooling: vulnerability scanning, endpoint protection, SIEM, logging and monitoring. • Secure CI/CD pipelines and deployment workflows from a security perspective. • Secure internal AI tools and LLM integrations — from API key management and prompt injection prevention to evaluating the security implications of AI adoption across the organization. • Manage and improve secrets management, key management, and access control practices across the organization. • Define and maintain secure coding guidelines and security review processes for engineering teams. • Collaborate with external providers on penetration tests and security audits, ensuring findings are prioritized and remediated. • Participate in incident response: investigation, containment, root cause analysis, and post-incident improvements. • Support compliance and audit readiness by implementing required security controls and maintaining documentation.
Benefits
• Remote-first, async culture with video calls. • EMEA hours preferred to overlap with Head of Security and core teams. • Slack and structured documentation to keep everyone aligned. • High-autonomy team where engineers ship great work.
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