Here’s the job description reformatted in Markdown, with all company branding and application form elements removed:

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Senior Backend Engineer - Building Energy Markets

Description

We are seeking a seasoned Backend Engineer capable of architecting scalable, high-performance systems for Japan's energy infrastructure, tackling complex domain challenges, and contributing to technical leadership across a growing organization.

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Products

• Trading Platform
  Japan's first full-scale trading platform for online buying and selling of energy.

• Market Data Platform
  A comprehensive data solution offering energy market data and insights crucial for power trading.

• Market Risk Management Tool
  An ETRM (Energy Trading Risk Management System) specialized for Japanese electricity, visualizing business risk from transactions and market data.

• Environmental Commodities Exchange
  A marketplace for domestic and overseas environmental credits, supporting climate change mitigation and carbon neutrality in Japan.

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Backend Challenges

• Domain-driven and scalable architecture design
• Ensuring high-level security, availability, and performance for near-infrastructure systems
• Navigating and understanding complex energy domains alongside domain experts
• Participating in the development and management framework for a tech organization of 50+ members

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Job Responsibilities

• Design and implementation of microservice architectures
  • API development using Go, gRPC
  • Domain and code design based on DDD
  • Database design and load estimation
• BFF development using GraphQL / Connect, etc.
• Infrastructure provisioning with GKE/Terraform
• Integration with various external systems
• Standardization of modules across departments
• Input to and participation in company-wide technical policy discussions

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AI Tools Utilized

• NotionAI
• OpenAI
• Claude
• Gemini
• NotebookLM
• CURSOR
• Devin

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Preferred Experience

• Experience with GCP/GKE
• Implementing authentication/authorization (user login/permission design)
• Development with DDD, TDD, Clean Architecture
• Experience with Auth0 and Terraform

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Desired Attributes

• Alignment with the mission of building energy markets and societal contribution
• Focused on impactful team delivery
• Prioritizes work to maximize business outcome
• Takes ownership and drives projects to completion
• Open to differing viewpoints, logical in discussions

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Working Conditions

Salary

• Annual: 10,000,000 - 15,000,000 yen
• Stock options available

Location

• Tokyo Office, Minato-ku
  Remote work possible, with no mandatory attendance requirements

Employment Type

• Full-time

Work Hours

• Full flex-time (no core hours); standard 8 hours/day

Leave

• Weekends and public holidays off
• 10 days annual paid leave (in accordance with Japanese Labor Standards)
• 5 consecutive "refreshment" days off
• 5 sick days

Probation Period

• 3 months (same conditions as regular employment)

Benefits

• Full social insurance (health, pension, worker’s compensation, unemployment)
• Transportation allowance (up to 50,000 yen/month)
• Books fully covered by company
• Remote work subsidy
• Company housing system
• Life event support (maternity/childcare leave, marriage/childbirth celebration payments/leave)
• Training subsidy for skill improvement
• Annual company trip
• Office convenience store

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