Job offer curation - ⁨electricity⁩

Seeking a seasoned Backend Engineer who can architect scalable, high-performance systems for Japan's energy infrastructure while managing complex domain challenges and contributing to technical leadership across a growing organization. Company Overview Since our founding in 2019, we have provided a marketplace for energy providers and have grown to become Japan's largest online trading market, including major power companies. Our GTV (Gross Transaction Value) is approaching 3 trillion yen, and we aim to realize a 100 trillion yen market in annual transaction volume in the future. In 2024, we raised 6 billion yen in Series B funding from domestic and international institutional investors including DCM Ventures and Solos Capital Management, financial institutions, and 9 energy trading businesses including power, gas, and trading companies, and are actively investing in our development team. Products 1/ eSquare: Trading Platform Japan's first full-scale trading platform that allows online buying and selling of energy. 2/ eCompass: Market Data Platform A data platform that provides all energy-related data and market information necessary for power trading, such as power prices and fuel price market data. 3/ eScan: Market Risk Management Tool An ETRM (Energy Trading Risk Management System) specialized for Japanese electricity that visualizes business risk amounts from transaction status and market data. 4/ JCEX: Environmental Commodities Exchange A marketplace where domestic environmental commodities and overseas voluntary credits can be bought and sold online, supporting climate change mitigation and the realization of carbon neutrality in Japan. Backend Challenges - Domain-driven design and architecture design in anticipation of system scaling - High-level security, availability, and performance for building systems close to national infrastructure - Understanding complex energy domains while communicating with domain experts - Developing a management and people development system for a tech organization of

Seeking a seasoned Backend Engineer who can architect scalable, high-performance systems for Japan's energy infrastructure while managing complex domain challenges and contributing to technical leadership across a growing organization. Company Overview Since our founding in 2019, we have provided a marketplace for energy providers and have grown to become Japan's largest online trading market, including major power companies. Our GTV (Gross Transaction Value) is approaching 3 trillion yen, and we aim to realize a 100 trillion yen market in annual transaction volume in the future. In 2024, we raised 6 billion yen in Series B funding from domestic and international institutional investors including DCM Ventures and Solos Capital Management, financial institutions, and 9 energy trading businesses including power, gas, and trading companies, and are actively investing in our development team. Products 1/ eSquare: Trading Platform Japan's first full-scale trading platform that allows online buying and selling of energy. 2/ eCompass: Market Data Platform A data platform that provides all energy-related data and market information necessary for power trading, such as power prices and fuel price market data. 3/ eScan: Market Risk Management Tool An ETRM (Energy Trading Risk Management System) specialized for Japanese electricity that visualizes business risk amounts from transaction status and market data. 4/ JCEX: Environmental Commodities Exchange A marketplace where domestic environmental commodities and overseas voluntary credits can be bought and sold online, supporting climate change mitigation and the realization of carbon neutrality in Japan. Backend Challenges - Domain-driven design and architecture design in anticipation of system scaling - High-level security, availability, and performance for building systems close to national infrastructure - Understanding complex energy domains while communicating with domain experts - Developing a management and people development system for a tech organization of

■Engineering & Research Division / Full Stack Engineer ■Summary We are looking for an experienced Fullstack Software Engineer to lead the server-side development of our Energy Management System applications. This system serves as the intelligence behind our battery solutions, supporting automation and optimization of operations across various electricity markets. You will help design and implement robust, high-performance backend infrastructure that ensures scalability, reliability, and responsiveness. ■Job Scope - Design, develop, and maintain highly performant, reliable, scalable, and secure backend systems and server side logic for WebApp/ Mobile App/ Services pertaining to Energy management , Battery management , Charger management & Asset management - Oversee projects from conception to deployment, ensuring smooth execution and delivery to create a great and on-brand user experience. - Maintain and optimize the backend infrastructure to meet evolving project needs. - Collaborate with front-end developers to integrate user-facing elements with server-side logic. - Write clean, standardized, maintainable, testable, and reusable backend code to solve business and technical problems. ■Internal common IT tools - Google Workspace （Gmail, G-cal, Gmeet等） - Slack - Notion - Dialpad - SmartHR - Money Foward - Bakuraku etc. ■About Engineering and Research Division Our Engineering and Research Division consists of mainly three teams that handle end-to-end development of Hardware and software systems for Energy storage & power transfer solutions and services. Currently, approximately 50 specialists are engaged in the mission of advancing energy storage technologies and solutions. The Division is organized into the following teams: - Series Development: Responsible for prototyping, testing & validation , requirements engineering , series handover of new products including product support and commissioning. - Advanced Engineering: Responsible for development and experimentation into emerging technologies to sustain