Security Engineer

Security Engineer Join to apply for the Security Engineer role at LEDN . We are a global financial services company built for digital assets, offering egalitarian lending, savings, and trading products to over 150 countries. Our mission is to democratize access to the global economy through digital assets. 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. Responsibilities Lead 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. Own roadmap for authentication and identity across customer and internal applications. Enhance existing Cognito‑based identity architecture with phishing‑resistant MFA solutions (WebAuthn, passkeys, hardware tokens). Design enclave‑based architectures to isolate and protect sensitive workloads using AWS Nitro Enclaves. Integrate Nitro Enclaves with KMS and secure APIs. Migrate high‑value operations into enclave environments. 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). Qualifications 10 years of proven experience in Application Security focused on web and cloud‑native applications. Strong knowledge of JavaScript/TypeScript/Golang/Python and OWASP Top 10 vulnerabilities. Expertise with AWS security best practices, especially 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, and 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 software supply chain security. Strong communication and collaboration skills. Remote work experience and adaptability to high‑growth, fast‑paced environment. Nice to Have Familiarity with Bitcoin custody and key management practices. Infrastructure as Code security (Terraform, AWS CDK). Experience building user‑facing security features such as passwordless authentication or device trust. Culture & Benefits We value integrity, passionate progress, and empathy. Ledn offers a competitive PTO package, equity ownership, and the ability to work remotely worldwide for up to 180 days per year. We are an equal‑opportunity employer and value inclusion and diversity. Logistics Seniority level: Mid‑Senior level Employment type: Full‑time Job function: Information Technology Industry: Retail, Digital Assets Contact Please submit your application through our portal. We do not accept unsolicited agency resumes. J-18808-Ljbffr

Location: Bragança Paulista, São Paulo, BR

Posted Date: 10/28/2025