★Back-End Engineer | Famous Energy Tech Company

• Japanese: Business Level REQUIRED (N2 Level)

★Start-up Company

★Flextime System & Fully Remote Work

★Annual salary: 5.5 million yen - 10 million yen

★In-house Development

【About the company】

The company is a startup that operates the largest energy marketplace in Japan. Covering everything from electricity and fuel to environmental value, its goal is to achieve "Social Good" through a fair market that enables anyone to exchange all types of energy value in an open and accessible way.

As global energy conditions become increasingly uncertain, resource-scarce Japan is directly affected. For example, electricity prices—critical to the foundation of economic activity—have experienced extreme volatility. The energy marketplace developed by enechain empowers businesses to manage this uncertainty, contributing to the stabilization of the Japanese economy and revitalizing Japanese enterprises.

In order to mitigate the escalating risks of climate change, a global commitment to carbon neutrality is essential. The company's environmental marketplace promotes decarbonization efforts across entire supply chains through the trading of environmental value. By accelerating the realization of carbon neutrality, it aims to create a brighter, more prosperous future for the next generation.

Through the power of markets, the company strives to enrich Japan's economy and create a more sustainable society. By establishing a strong foundation in the form of an energy marketplace—an essential part of daily life—it brings lasting value and vitality to society as a whole.

【 Job Description】

■ Company Overview

Since its founding in 2019, the company has provided an online marketplace for energy businesses and has grown into Japan's largest trading platform, with participating corporate clients—including major electric power companies—accounting for 95% of the market share. Its Gross Transaction Value (GTV) is approaching ¥2 trillion, and it now aims to achieve a ¥100 trillion annual transaction volume in the near future.

In 2024, the company raised ¥6 billion in Series B funding, with investment from both domestic and international institutional investors, including DCM Ventures, as well as nine energy trading companies spanning power, gas, and general trading sectors. It is now actively investing in expanding its development team.

■Products

①eSquare: Trading Platform

Japan's first full-scale online trading platform for energy, allowing users to freely buy and sell energy.

(This is a licensed business approved by the Ministry of Economy, Trade and Industry.)

②eCompass: Market Data Platform

A data platform that provides comprehensive energy-related information necessary for electricity trading, including market data such as electricity and fuel prices.

③eScan: Market Risk Management Tool

An Energy Trading Risk Management (ETRM) system specialized for the Japanese power market, which visualizes business risks based on trading activity and market data.

It also offers simulation features to compare risks under various scenarios.

■ Challenges in Backend Development

・Designing domains and architectures with a forward-looking approach to accommodate future system scalability.

・Building systems that require a high level of security, availability, and performance, as they are expected to operate on a national infrastructure level.

・Understanding the complexities of the energy domain through close communication with domain experts.

・Establishing effective management and talent development systems for a large tech organization with over 50 members.

・Enhancing technical branding and recruitment outreach.

■ Responsibilities

• Design and implementation for microservice development

• API development using Go and gRPC

• Domain modeling and code design based on Domain-Driven Design (DDD)

• Database design and load estimation

• BFF (Backend for Frontend) development using GraphQL / Connect

• Infrastructure setup using GKE and Terraform

• Implementation of integrations with various external systems

• Monitoring environment setup using DataDog (in collaboration with SRE)

• CI/CD pipeline development and maintenance (in collaboration with SRE)

■ Tech Stack

Frontend: React, TypeScript

Backend: Go/gRPC, NestJS/GraphQL

Database: PostgreSQL

Data Engineering / Analytics: Python

Mobile: Flutter

Infrastructure: GCP, GKE, Argo Workflows, BigQuery, Pub/Sub, Dataflow, etc.

Infrastructure as Code (IaC): Terraform

Analytics Tools: Looker Studio, Tableau, Google Analytics

CI/CD: Cloud Build, GitHub Actions, Argo CD

Logging / Monitoring: Datadog

■ Business Tools

・Slack

・Notion

・Gather

・Figma

・GitHub Copilot

【 Requirements】

Required

• 3+ years of backend development experience

• Experience using RDB (Relational Databases)

• Experience in service operations (e.g., incident response, monitoring)

Preferred

• Experience with GCP

• Experience with GKE

• Frontend development experience

【Working Time 】

Flextime System

(*Core-time 11:00~16:00)

【 Welfare 】

・Full Social Insurance

・Commuting Allowance

・Medical checkups

・Various in-house events, etc.

■Measures to prevent passive smoking

・In principle, no smoking indoors (smoking rooms are available indoors)

・Yotsuya Office, Minami Shinjuku Office, Osaki Office

・Salary revision: Twice a year

・Allowance: Transportation expenses (in accordance with company regulations), LINE Pay Card Benefit Plan(*2)

(*1) In addition to the annual salary amount, incentives may be paid twice a year depending on the company's and the individual's performance and evaluation.

(This is not always paid. Only employees who are enrolled at the company on the date of payment are eligible for the payment).

(*2) This allowance is paid separately from salary for the purpose of "health maintenance and improvement," "self-development," and "next-generation development" of employees.

【 Holiday 】

• 2 days a week (Saturday and Sunday)
• Annual Paid Leave
• National Holidays
• New Year holiday, etc