Security engineering internship at Mercari's marketplace (for students able to join as new grads in Oct 2027 or Apr 2028), working remote or from the Roppongi office. Interns pick one focus — threat modeling/code review, security testing, monitoring/log analysis, security automation, or AI-security research — using Go/Python/PHP/JavaScript, Linux, SQL and a GCP/Kubernetes/Terraform stack.
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