Senior Security Engineer

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    "datePosted": "2026-03-25",
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    "description": "<p><span style=\"color: rgb(31, 77, 120); font-family: Arial, sans-serif; font-size: 12pt; font-weight: bold\">About the role</span></p>\n<p><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">We are looking for a Senior Security Engineer with strong crypto and Web3 domain knowledge to join our Engineering team. You will be part of a collaborative team headquartered in Tokyo (Shibuya), operating on Japan Standard Time. We are hiring across APAC for candidates who can work in close timezone alignment with the Tokyo team. Reporting directly to the Director of Engineering, you will own the security posture of our products and infrastructure from end to end, spanning application security, cloud and Kubernetes environments, smart contract security, security operations, and compliance. This is a high-impact role based in our Tokyo office, or fully remote from within the APAC region. <span style=\"font-weight: bold\">You must be physically located in Japan or a nearby APAC country with working hours that fully overlap with Japan Standard Time (JST/UTC+9).</span> Candidates outside APAC who plan to work night shifts to cover JST will not be considered. You will work closely with our DevOps and Engineering teams across an AWS-native, containerized stack, and help us stay ahead of the rapidly evolving, AI-accelerated threat landscape in the crypto and Web3 space.</span></p>\n<p><br></p>\n<p><span style=\"color: rgb(31, 77, 120); font-family: Arial, sans-serif; font-size: 12pt; font-weight: bold\">Key responsibilities</span></p>\n<ul>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Lead the design and implementation of security controls across AWS, EKS/Kubernetes, CI/CD (Jenkins, GitHub Actions, ArgoCD), and AI/agentic engineering workflows.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Own threat modelling, risk assessments, and security architecture reviews across infrastructure, applications, and AI-driven systems.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Drive vulnerability management end-to-end — including code, infrastructure, and AI-generated artifacts — using tools such as NewRelic, Bugsnag, and security scanners.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Define and enforce secure coding and AI usage standards, including guardrails for LLMs, copilots, and automated workflows.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Build and operate security monitoring, alerting, and incident response capabilities, including detection and handling of AI/agent-related risks.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Evaluate and manage security and AI tooling (SAST/DAST, SIEM, EDR, secrets management), ensuring least-privilege access and secure integrations.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Harden infrastructure and data layers (Terraform, IAM, VPC, Cloudflare, Cassandra, Kafka, Redis), including protections against unauthorized or automated actions.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Drive compliance (SOC 2, ISO 27001) with a focus on auditability, data protection, and governance of AI systems.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Act as a security leader — educating teams, shaping best practices, and staying ahead of threats across AI, cloud, and Web3 (smart contracts, key management, bridges).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Partner with blockchain/product teams to mitigate risks in decentralized systems.</span><br></li>\n</ul>\n<p><br></p>\n<p><span style=\"color: rgb(31, 77, 120); font-family: Arial, sans-serif; font-size: 12pt; font-weight: bold\">Requirements</span></p>\n<p><span style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt\">We are looking for someone with hands-on experience across both offensive and defensive security disciplines:</span></p>\n<ul>\n<li><span style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt\">Based in APAC, within roughly ±2 hours of Japan Standard Time (JST/UTC+9), e.g., Japan, South Korea, Taiwan, Philippines, eastern Australia, etc. Full daily overlap with Tokyo working hours is required. </span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\"><span style=\"font-family: arial, helvetica, sans-serif\">5–8 years in security engineering across application, cloud, and infrastru</span>cture security.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Strong understanding of crypto/Web3 security (smart contracts, wallet/key management, blockchain attack vectors).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Deep hands-on experience securing AWS (IAM, VPC, EKS, S3, EC2) and Kubernetes environments.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Proficiency in AppSec (OWASP Top 10, secure SDLC, code reviews) and common security tooling (SAST/DAST, SIEM, secrets management).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Solid foundation in network security, cryptography, and auth protocols (OAuth, SAML, MFA).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Experience with incident response, threat modelling, and frameworks like MITRE ATT&amp;CK.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Familia<span style=\"font-family: arial, helvetica, sans-serif\">rity with compliance standards (SOC 2, ISO 27001, NIST, GDPR).</span></span></li>\n<li><span style=\"font-family: arial, helvetica, sans-serif; font-size: 10pt\">Strong communication skills and ability to operate autonomously.</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"color: rgb(31, 77, 120); font-family: Arial, sans-serif; font-size: 12pt; font-weight: bold\">Nice to have </span></p>\n<ul>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Certifications (CISSP, OSCP, AWS Security, etc.).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">DevSecOps experience and CI/CD security integration.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Experience with Cloudflare, service mesh (Istio), or microservices security.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Background in software engineering (Java, Rust, TypeScript).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Smart contract auditing or Web3 tooling (Slither, MythX, Certora, on-chain monitoring).</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Experience building or scaling a security function.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Professional fluency in Japanese.</span></li>\n</ul>\n<p><br></p>\n<p><span style=\"color: rgb(31, 77, 120); font-family: Arial, sans-serif; font-size: 12pt; font-weight: bold\">What we offer </span></p>\n<ul>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">A high-impact, senior-level role with direct visibility to engineering and company leadership.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Ownership over a broad, challenging security mandate with room to shape strategy.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Collaborative and engineering-first culture that values security as a core competency.</span></li>\n<li><span style=\"font-family: Arial, sans-serif; font-size: 10pt\">Opportunities for professional development, certifications, and conference attendance.</span></li>\n</ul>",
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