AI Native Platform Engineer | Supporting AI-Era Development Experience and Governance for Rapid Business Growth in the 100 Trillion Yen Market

Description

Overview

A leading player in the Japanese energy marketplace, operating since 2019 and currently serving the vast majority of corporate clients in the market, is rapidly expanding its technology platform to achieve its next stage of growth. With a focus on advanced development experiences and robust governance, the company is investing heavily in AI-driven product development and platform engineering.

Products

• eSquare: Online trading platform for energy transactions.
• eCompass: Data platform providing real-time market information for power and fuel prices.
• eScan: Risk management tool tailored for the Japanese power market (ETRM System).
• JCEX: Marketplace for environmental value transactions supporting carbon neutrality and climate change mitigation.

Platform Engineering Challenges

1. Balancing Rapid Growth with Developer Experience and Governance
   Building a development foundation that enables both fast and seamless product delivery and high-standard governance (standardization, security, audit readiness).

2. Creating Platforms for the AI Era
   Transitioning from traditional, human-operated infrastructure to environments designed for AI-accelerated development and deployment.

3. AI-Native Platform Engineering with a Small Team
   Systemizing infrastructure provisioning, deployment, testing environments, and governance to enable both developers and AI tools to operate safely and autonomously.

Responsibilities

As a Platform Engineer, you will help build the foundational development environment enabling developers to deliver products quickly, safely, and effectively. Scope will adapt as the team grows.

• Development of the internal developer platform (IDP) and migration from existing infrastructure (schema-driven generation of Terraform/Kubernetes code).
• Development and company-wide rollout of PR Preview environments (provisioning environments per PR using Kubernetes controllers).
• Operations and improvements of shared GKE/Kubernetes clusters; redesign of standard configurations.
• Development and promotion of Terraform/IaC foundation (common modules, CI/CD).
• Enhancement of deployment/job execution platforms via Argo CD/Argo Workflows.
• Automation of configuration checks via Policy as Code, leveraging AI for change review/quality gates.
• Establishing permissions and audit trails for safe AI-powered infrastructure automation.
• Structuring decision-making with ADR/Design Docs; running developer guidelines and office hours.

Tech Stack

For more details: Tech Blog

• Frontend: React, TypeScript
• Backend: Go/gRPC, NestJS/GraphQL
• Database: PostgreSQL
• Data Engineering: Python
• Mobile: Flutter
• Infrastructure: GCP, GKE, Argo Workflow, BigQuery, Pub/Sub, DataFlow, etc.
• IaC: Terraform
• Analytics: Looker Studio, Tableau, Google Analytics
• CI/CD: Cloud Build, GitHub Actions, Argo CD
• Logging/Monitoring: Datadog

AI Tools

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

Requirements

Preferred Experiences

• Hands-on experience in SRE, Platform Engineering, Infrastructure, or Backend Engineering
• Developing tools and platforms using languages like Go
• Building Kubernetes controllers/operators
• Building/operating internal developer platforms (IDP/Backstage, etc.)
• Automating configuration checks via Policy as Code (OPA, conftest)
• Building monitoring/observability platforms (e.g., Datadog)
• Operating medium-to-large scale, high-trust systems (finance, trading, mission-critical, etc.)
• Designing/operating microservice architectures
• Improving development/operations workflow via Generative AI or MCP, evaluating output quality
• Writing technical blogs, public speaking, or internal workshops

We are Looking For

• Someone passionate about the mission of “Building Energy Markets, Coloring Our Society,” and who enjoys tackling complex, socially significant domains like the energy market.
• An engineer with a broad perspective on platforms—not limited to infrastructure provisioning but also covering developer experience, standardization, governance, and security.
• Someone who treats the platform as a "product," continuously improving it based on developer feedback.
• A pragmatic communicator capable of balancing ideals and reality through collaboration with product teams.
• Someone eager to explore the future of Platform Engineering in the AI era with flexibility and boldness.

Working Conditions

Salary

• ¥9,000,000 ~ ¥15,000,000 per year

Location

• Tokyo Office (Minami-Aoyama, Minato-ku)
• Remote work available (Onboarding period may require office work)

Job Type

• Full-time (Permanent)

Work Hours

• Full-flex (no core time, standard 8 hours/day)
• Annual holidays: 122 days (complete 2-day weekends), public holidays, summer/winter holidays, paid leave, special/parental leave, refresh leave (5 consecutive days/year above annual paid leave), and more.

Probation Period

• 3 months (same conditions as permanent employment)

Benefits

• Stock options
• Complete social insurance (health, pension, unemployment, workers' comp)
• Commuting allowance (up to ¥50,000/month)
• Full coverage of book expenses
• Remote work subsidy
• Company housing system
• Life event support system (maternity/paternity leave bonuses, wedding/birth gifts, special holidays)
• Skill-up training subsidies
• Company trips
• Free water server, drip coffee
• Office convenience store/snacks, and more