Kakao Hiring for Certificate Development Team to Build PKI Platform Serving 35 Million Users

The Kakao Certificate Development Team develops and operates a PKI system based on KakaoTalk, currently serving 35 million users. This team handles core infrastructure for various services, including simplified authentication for public institutions such as the National Tax Service and Government24, as well as password recovery, and is expanding its use cases into B2B contracts and the electronic signature market.

The technology stack is primarily based on Kotlin, Spring Boot 2, JPA, and MySQL, utilizing Redis, Zookeeper, Kafka, Kubernetes, and Docker to build systems that reliably handle large-scale traffic and massive data volumes. In terms of development culture, the team values freely exchanging opinions regardless of seniority and growing technical capabilities together through code reviews and discussions.