{
  "$schema": "https://raw.githubusercontent.com/jsonresume/resume-schema/v1.0.0/schema.json",
  "basics": {
    "name": "Seong Yong-ju",
    "label": "Software Engineer/Systems Architect",
    "email": "sei40kr@gmail.com",
    "url": "https://yong-ju.me",
    "location": {
      "countryCode": "JP",
      "region": "Fukuoka",
      "city": "Miyako-gun"
    },
    "profiles": [
      {
        "network": "LinkedIn",
        "username": "sei40kr",
        "url": "https://www.linkedin.com/in/sei40kr/"
      },
      {
        "network": "GitHub",
        "username": "sei40kr",
        "url": "https://github.com/sei40kr"
      },
      {
        "network": "LeetCode",
        "username": "sei40kr",
        "url": "https://leetcode.com/u/sei40kr/"
      },
      {
        "network": "AtCoder",
        "username": "sei40kr",
        "url": "https://atcoder.jp/users/sei40kr"
      }
    ]
  },
  "work": [
    {
      "name": "Freelance",
      "position": "Software Engineer",
      "startDate": "2019-02"
    },
    {
      "name": "Pega Japan K.K.",
      "position": "Systems Architect",
      "startDate": "2018-07"
    },
    {
      "name": "TeamSpirit Inc.",
      "position": "Frontend Engineer",
      "startDate": "2017-09",
      "endDate": "2018-06"
    },
    {
      "name": "Works Applications Co., Ltd.",
      "position": "Frontend & Backend & Database Engineer",
      "startDate": "2016-04",
      "endDate": "2017-04"
    }
  ],
  "languages": [
    {
      "language": "Japanese",
      "fluency": "Primary fluency"
    },
    {
      "language": "English",
      "fluency": "Limited working proficiency"
    }
  ],
  "certificates": [
    {
      "name": "AWS Certified Solutions Architect - Associate",
      "date": "2022-08-30",
      "url": "https://www.credly.com/badges/e0698708-ca85-49fc-96bc-671deee478c9",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified Developer - Associate",
      "date": "2022-09-05",
      "url": "https://www.credly.com/badges/6e274542-6da2-4bd6-a1d2-0b56b875fa40",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified SysOps Administrator - Associate",
      "date": "2022-09-08",
      "url": "https://www.credly.com/badges/78d21f4e-2751-4c50-bc15-5ee61200cf28",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified Solutions Architect - Professional",
      "date": "2023-07-15",
      "url": "https://www.credly.com/badges/424b60b1-ed2d-43cc-9bd7-78491ba1b23e",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified Security - Specialty",
      "date": "2023-07-31",
      "url": "https://www.credly.com/badges/f37658d8-379e-4dec-ba21-9816d4e33405",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified Database - Specialty",
      "date": "2023-08-14",
      "url": "https://www.credly.com/badges/2cc95589-69dd-41a4-830b-6847b75fb4ac",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified Advanced Networking - Specialty",
      "date": "2023-09-14",
      "url": "https://www.credly.com/badges/cb753aea-8a6f-44ba-99f2-8716d65bbcf2",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "AWS Certified Data Analytics - Specialty",
      "date": "2023-10-02",
      "url": "https://www.credly.com/badges/1daedd6b-bf65-40eb-82c2-5692397945b0",
      "issuer": "Amazon Web Services (AWS)"
    },
    {
      "name": "Applied Information Technology Engineer",
      "date": "2019-12-20",
      "issuer": "Information-Technology Promotion Agency, Japan (IPA)"
    },
    {
      "name": "Registered Information Security Specialist",
      "date": "2021-10-01",
      "url": "https://riss.ipa.go.jp/r?r=022567",
      "issuer": "Information-Technology Promotion Agency, Japan (IPA)"
    },
    {
      "name": "Deep Learning for GENERAL",
      "date": "2021-08-02",
      "issuer": "Japan Deep Learning Association (JDLA)"
    },
    {
      "name": "LPIC-1",
      "date": "2022-11-14",
      "url": "https://cs.lpi.org/caf/Xamman/certification/verify/LPI000543436/dzdbzfx26a",
      "issuer": "Linux Professional Institute (LPI)"
    },
    {
      "name": "OSS-DB Silver",
      "date": "2022-11-28",
      "url": "https://ma.educo-j.or.jp/d/EID900034729/n94t93twg5",
      "issuer": "Linux Professional Institute (LPI)"
    },
    {
      "name": "Microsoft Certified: Azure Fundamentals",
      "date": "2022-12-08",
      "url": "https://www.credly.com/badges/3ddc7308-360d-4f0b-b126-5720632a5d50",
      "issuer": "Microsoft"
    },
    {
      "name": "Microsoft Certified: Azure Administrator Associate",
      "date": "2024-02-20",
      "url": "https://learn.microsoft.com/ja-jp/users/77450645/credentials/af218da511ec4fa1",
      "issuer": "Microsoft"
    }
  ],
  "skills": [
    {
      "name": "Software Engineering",
      "level": "Advanced"
    },
    {
      "name": "Web Development",
      "level": "Advanced"
    },
    {
      "name": "Java",
      "level": "Advanced"
    },
    {
      "name": "Database",
      "level": "Intermediate"
    },
    {
      "name": "PHP",
      "level": "Beginner"
    },
    {
      "name": "Ruby",
      "level": "Beginner"
    },
    {
      "name": "C",
      "level": "Intermediate"
    },
    {
      "name": "Rust",
      "level": "Beginner"
    },
    {
      "name": "Haskell",
      "level": "Beginner"
    },
    {
      "name": "Shell Script",
      "level": "Intermediate"
    },
    {
      "name": "Pega Platform",
      "level": "Beginner"
    },
    {
      "name": "Emacs Lisp",
      "level": "Intermediate"
    }
  ],
  "projects": [
    {
      "name": "Development of Design System for Large-scale E-commerce Application",
      "description": "Development of a design system for a large-scale e-commerce application.",
      "highlights": [
        "Reviewed component designs",
        "Designed components according to Atomic Design",
        "Implemented component CSS",
        "Implemented mock pages for CSS component verification",
        "Implemented React components",
        "Reviewed and fixed HTML semantics of CSS components",
        "Documented design policies for component margins considering margin collapsing specifications",
        "Identified and considered implementation policies for Google Analytics use cases",
        "Released CSS components",
        "Implemented automation scripts for release tasks",
        "Migrated JavaScript build environment (gulp → Webpack)",
        "Migrated Webpack (v3 → v5)",
        "Directed CSS component development (2019/08 to end)",
        "Proposed lowering the priority of WAI-ARIA support for CSS components",
        "Proposed visual regression testing using mock pages to handle large-scale refactoring and unexpected side effects of margin collapsing",
        "Considered methods to reduce the bundle size of the design system",
        "Interpreted communication between domestic and overseas members"
      ],
      "startDate": "2019-05",
      "endDate": "2020-03",
      "roles": ["Frontend Engineer", "Director"],
      "entity": "Freelance"
    },
    {
      "name": "Replacement of Ticket Management System for Mega Bank",
      "description": "Replacement of the ticket management system for a mega bank.",
      "highlights": [
        "Investigated the specifications of the old system",
        "Redesigned logical and physical models of the old system",
        "Considered the differences in specifications between HQ users (auditors) and branch users",
        "Reviewed physical design and pointed out inconsistencies due to optimistic control and transaction isolation levels, and designs that violate \"one fact in one place\"",
        "Wrote Docker Compose to launch middleware for both old and new systems",
        "Designed domain-driven backend module structure with Maven",
        "Identified all domain exceptions",
        "Developed authentication features (detailed design to implementation)",
        "Designed and implemented application logs",
        "Designed and implemented rotation of application and audit logs",
        "Implemented all API Controllers",
        "Implemented customer list and registration screen",
        "Implemented ticket search screen",
        "Implemented ticket detail screen",
        "Implemented print report screen",
        "Modified to reference Thymeleaf templates outside of Java artifacts to reduce repackaging and swapping time",
        "Designed frontend architecture",
        "Pointed out the issue of not being able to physically delete child records in parent-child relationships and proposed changing to logical deletion",
        "Pointed out and fixed the issue of fixed authentication session keys in the old system"
      ],
      "keywords": [
        "Java",
        "Bootstrap",
        "Spring Boot",
        "Spring MVC",
        "Thymeleaf",
        "Git",
        "Maven",
        "MySQL",
        "MyBatis"
      ],
      "startDate": "2019-02",
      "endDate": "2019-04",
      "roles": ["Developer"],
      "entity": "Freelance"
    },
    {
      "name": "Subsystems of a Huge Financial System",
      "description": "Subsystems of a huge financial system. Built on Pega Platform.",
      "highlights": ["Developed several features"],
      "startDate": "2018-11",
      "endDate": "2019-01",
      "roles": ["Systems Architect"],
      "entity": "Pega Japan K.K."
    },
    {
      "name": "Attendance & Time Tracking System",
      "description": "An enterprise application to provide an attendance management & time tracking. Built on Sales Cloud.",
      "highlights": [
        "Designed specifications and developed several features",
        "Set up static type checking for the project"
      ],
      "startDate": "2017-09",
      "endDate": "2018-06",
      "roles": ["Frontend Engineer"],
      "entity": "TeamSpirit Inc."
    },
    {
      "name": "Frontend Developer Tools",
      "description": "Frontend developer tools to improve product developers' productivities.",
      "highlights": [],
      "startDate": "2017-02",
      "endDate": "2017-04",
      "roles": ["Frontend Engineer"],
      "entity": "Works Applications Co., Ltd."
    },
    {
      "name": "Domestic Datasync Framework",
      "description": "A domestic framework to sync data between RDB and Cassandra.",
      "highlights": [
        "Developed a distributed batch process to synchronize data in bulk",
        "Created a testing tool to enable framework users to test their modules easily",
        "Developed a useful feature to reproduce data-related issues in the development environment"
      ],
      "startDate": "2016-10",
      "endDate": "2017-01",
      "roles": ["Frontend Engineer", "Backend Engineer", "Database Engineer"],
      "entity": "Works Applications Co., Ltd."
    },
    {
      "name": "Employee Onboarding System Prototyping",
      "description": "A prototype of an Employee Onboarding subsystem of an ERP product.",
      "highlights": ["Designed and developed several mockup screens"],
      "startDate": "2016-08",
      "endDate": "2016-09",
      "roles": ["Frontend Engineer"],
      "entity": "Works Applications Co., Ltd."
    }
  ]
}