Senior Security Engineer

About the job

You'll own the security of our AWS infrastructure and our client-facing web and mobile apps. This ishands-on engineering — building controls and breaking things, not filing findings for someone else to fix.

What you'll do

Cloud security

• Design and enforce guardrails across multi-account AWS — IAM least privilege, SCPs, secretsmanagement, network segmentation
• Build detections on CloudTrail, GuardDuty, and Config, and own the alerts you create
• Secure our EKS and CI/CD layer: admission control, image scanning, IaC scanning, SBOM as a build artifact
• Integrate SIEM and CSPM platforms, and write the detection rules that run on them 

Mobile security

• Attack our own Android and iOS builds — reverse engineer, hook with Frida, bypass detection logic, and report what you find before someone else does
• Review WebView and native bridge surfaces, deeplinks, and on-device storage for token and PIIleakage
• Run pre-release mobile pentests and drive fixes with the mobile teams
• Working knowledge of app integrity is a plus: root/jailbreak and hooking-framework resistance,Play Integrity / App Attest, certificate pinning and rotation

Web and application security

• Threat model and review new services, with focus on auth and money-movement flows
• Own WAF and edge security — rule authoring, bot management, bypass-path review
• API security: authorization enforcement, BOLA/IDOR classes, token and session lifecycle, OAuth/OIDC review
• Triage our responsible disclosure pipeline end to end

Incident response and assurance

• Security on-call; lead investigations across cloud, identity, and endpoint logs through to root cause and closure
• Run internal VAPT cycles and track remediation to closure

What we're looking for

• 3–5 years in security engineering, with hands-on cloud security at scale
• Strong scripting in Python or Go; automation is the job, not a bonus
• OWASP Top 10, MASVS, and API Security Top 10 as working tools

Nice to have

• Fintech or other regulated-industry experience
• Kubernetes/EKS security depth
• CVEs, published research, CTF placements, or bug bounty track record
• OSCP or equivalent