【Core System Engineer Senior Software Engineer (Business Foundation Domain) | Lead the Modernization of Core Business Systems】Core System Supporting Japan's Largest Print EC | Accounting, Data Foundation, Large-Scale Data Management | Petabyte-Scale Data | Core SaaS Connection | Collaborate with Department/Division Managers | Hybrid Work (1 Day In-Office)English summary from Japanese

Must-haves

• Experience in operating and improving data infrastructure (including data marts).
• Experience in designing connections with accounting and business systems.
• Experience in overall core system architecture design, considering large data volumes and high loads.
• Experience in design reviews including non-functional requirements (performance, security, operability).
• Ability to gain consensus and drive projects with internal stakeholders (accounting, business, development).

Nice-to-haves

• Technical lead for core SaaS/ERP implementation.
• Experience with AI utilization and data quality/freshness/structure design.
• Experience across multiple core domains (data, images, authentication/authorization).

Tech stack