DX Promotion Engineer

This full-time, indefinite-term role is employed by CARTA HOLDINGS and seconded to Yomite. As the business unit’s first engineer, the position works directly with management from requirements definition through implementation and operations. It covers system architecture, technology selection and data-platform design for DX and data-driven marketing. Yomite handles product planning, marketing, inventory management and customer success internally for consumer products.

Responsibilities include designing the overall system architecture and data foundation, integrating data scattered across shopping carts, inventory tools, marketplaces and advertising platforms, and making it usable for business decisions. The engineer will define, prototype and implement dashboards, inventory and shipment forecasting tools, and DX solutions for marketing, customer success and inventory operations. The role also includes testing and implementing operational-efficiency prototypes using LLMs and RAG, including AI legal checks. Longer-term initiatives include real-time LTV and CPA visibility by channel and campaign, demand forecasting, inventory optimization and AI-supported customer-touchpoint design.

The engineer collaborates with brand, corporate-platform and external-channel teams. CARTA HOLDINGS’ CTO office and ICT teams provide technical advice and proof-of-concept development support. The role spans the company’s business structure and is intended to connect technical decisions directly with product and operational improvement.

Required experience includes approximately two or more years of practical SQL data extraction and aggregation, basic database design and operation, use of Google Cloud or AWS, development of integrations with external systems through Web APIs such as REST APIs, and taking business-side requests from requirements definition through implementation. Preferred qualifications include building data platforms or pipelines with Google Cloud, BigQuery, Cloud SQL or AWS; knowledge of e-commerce, D2C or web marketing concepts such as LTV, CPA, subscription commerce and inventory management; API integration with ecforce, Shopify or inventory and logistics systems; knowledge of Meta, Google or TikTok advertising APIs; and experience creating internal-efficiency prototypes with LLMs such as the OpenAI API or RAG.

The named environment includes Google Cloud, BigQuery, Cloud SQL, AWS, ecforce, クラロジ, Amazon marketplaces, Meta, TikTok and Google advertising platforms, Relation email, Web advertising APIs, marketplace APIs and generative-AI technologies.

The workplace is in Minato-ku, Tokyo. The stated scope of workplace changes includes remote work and secondment locations. Standard hours are 9:30–18:30 with eight working hours and a 60-minute break. A super-flextime system has no core hours and allows employee-selected work between 6:00 and 22:00; overtime may occur. Estimated annual compensation is ¥6.0–12.0 million, with a three-month probation period and no changed conditions during probation. Monthly pay includes base pay, a ¥55,000 life-plan allowance, fixed overtime for 45 hours and fixed late-night pay for 15 hours, with excess amounts paid separately. A performance-based year-end bonus and incentives may apply, and pay adjustments occur twice yearly. Holidays include weekends, public holidays and year-end holidays, with paid, condolence, bonus and wellbeing leave. Benefits include commuting support up to ¥50,000 per month, insurance, defined-contribution pension options, career development, medical support and resort and recreation facilities.