Security Engineer

OverviewJoin or sign in to find your next job Join to apply for the Security Engineer role at LEDN . Security Engineers — Ledn is a global financial services company built for digital assets, helping to improve the everyday lives of Bitcoin holders while building generational wealth for the future. Ledn offers a suite of egalitarian lending, savings and trading products to digital asset holders in over 150 countries. Our team is diverse and driven by a conviction that digital assets can democratize access to the global economy. We value integrity, accountability, progress, and empathy. The Opportunity: We are seeking a full-time Security Engineer with deep expertise in Application Security, Identity & Access Management, and Confidential Computing to strengthen the security of our Bitcoin-backed loan platform. This is a hands-on engineering role with direct impact on product security, infrastructure security, and customer trust. ResponsibilitiesLead secure design and code reviews across engineering teams. Define and enforce secure coding practices for JavaScript/TypeScript services. Automate vulnerability detection (SAST, SCA, DAST) within CI/CD. Conduct threat modeling and risk assessments for new features. Partner with engineers to remediate vulnerabilities and improve secure development practices. Own the roadmap for authentication and identity across customer and internal applications. Enhance Cognito-based identity architecture with stronger, phishing-resistant MFA solutions (e.g., WebAuthn, passkeys, hardware tokens). Collaborate with Product to align usability, compliance, and security in authentication flows. Define secure approaches to session management, device trust, and account recovery. Design enclave-based architectures to isolate and protect sensitive workloads using AWS Nitro Enclaves; migrate high-value operations into enclave environments; ensure compliance and auditability. Harden AWS services (Lambda, API Gateway, SQS, SNS) with least-privilege IAM and secure key management. Improve Kubernetes security posture (RBAC, pod security, image scanning, runtime monitoring). Deploy and operate a SIEM framework; develop detection rules, dashboards, and incident playbooks. Support compliance initiatives (SOC 2, ISO 27001) with security controls and documentation. Qualifications10 years minimum of proven experience in Application Security with a focus on web and cloud-native applications. Strong knowledge of JavaScript/TypeScript/Golang/Python and modern web vulnerabilities (OWASP Top 10, auth bypasses, business logic flaws). Expertise with AWS security best practices, particularly in serverless architectures. Hands-on experience with AWS Nitro Enclaves for confidential computing. Deep understanding of authentication and authorization standards (OAuth2, OIDC, WebAuthn, FIDO2). Practical experience with Cognito / Auth0 (MFA, custom flows, secure session handling). Background in SIEM design and log correlation across cloud and application layers. Familiarity with Kubernetes security (RBAC, pod security, admission controls, image scanning). Experience with Secure Code Review and understanding of software supply chain. Strong communication and collaboration skills; able to influence engineering and product teams. Nice To HavesFamiliarity with Bitcoin custody and key management practices. Knowledge of Infrastructure as Code security (Terraform, AWS CDK). Prior work on user-facing security features such as passwordless authentication, recovery flows, or device trust. Culture & Desired AttributesWe seek a leader who thrives in a startup or tech environment and embodies our values: act with integrity, own it, have a passion for progress, and lead with empathy. Be adaptable, resilient, and comfortable navigating ambiguity in a high-growth, fast-paced environment. Be collaborative, able to influence across functions and cultures with empathy and clarity; demonstrate integrity and accountability with confidential information. Remote-ready experience and ability to work in a global, distributed team. Benefits & What We ProvideGrowth opportunities with a comprehensive, best-in-class total rewards package starting on day one. Competitive PTO and ownership in the company through shared equity. Remote-friendly policy: work remotely anywhere in the world for up to 180 days (subject to restrictions). A purpose-driven role in a global digital asset company. Inclusive, diverse work environment with equal opportunity employment and accommodation requests handled confidentially. OtherLedn is remote-first with a global team spanning North America, Latin America, South Africa and Europe. Due to high application volume, qualified applicants will be contacted. No agencies or unsolicited resumes. #J-18808-Ljbffr