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Location
In office (Tokyo)
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 25, 2026. First seen by Alion on Oct 20, 2026. Astroscale scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Astroscale develops spacecraft and technologies for on-orbit servicing including life-extension, active debris removal, end-of-life services and in-situ space situational awareness. The company builds and operates satellite servicers and demonstration missions, notably the ELSA-d capture demonstrator, to remove or maintain space assets and mitigate orbital debris. Astroscale works with government agencies, commercial satellite operators and international partners to create sustainable space systems, business cases and norms for the responsible use of space.

私たちのリアルな様子はこちらから→ 株式会社アストロスケールの会社情報 - Wantedly

Export Control Laws:

Unless explicitly notified otherwise, our vacancies are covered by Export Control Laws which require candidates to be from an "Export Safe" Country as deemed by the Japanese Government.

The countries are as follows:

Japan, Germany, Australia, Argentina, Italy, USA, France, Netherlands, UK, Austria, Ireland, Czech, Spain, Greece Canada, New Zealand, Belgium, Bulgaria, Sweden, Switzerland, Norway, Finland, Luxembourg, Portugal, Denmark Hungary and Poland.

Job Description / Roles & Responsibilities

Astroscale is seeking a Junior Cloud Architectwho will be responsible for the operation and maintenance of our AWS cloud environment while progressively taking on cloud architecture and design responsibilities.

This is a development-oriented position intended for candidates who possess foundational AWS infrastructure knowledge and aspire to grow into a Cloud Architect role in the future.

After joining the company, you will begin by learning and supporting the existing AWS environment. While handling day-to-day infrastructure operations, you will participate in architecture design activities under the guidance of senior team members. You will also gradually expand your responsibilities in managing and operating Infrastructure as Code (IaC) using Terraform.

By deepening your technical expertise, architecture design capabilities, and business understanding, you will be expected to grow into a Cloud Architectrole over time.

Key Responsibilities

AWS Infrastructure Operations

  • Understand, operate, and support the AWS environment.
  • Administer and maintain the following AWS services:
    • Amazon EC2
    • Amazon VPC
    • AWS IAM
    • Amazon S3
    • Security Groups
    • Amazon Route 53
    • VPN and connectivity infrastructure
    • Other related infrastructure services
  • Assist with AWS environment provisioning.
  • Configuration management.
  • Infrastructure monitoring.
  • Incident response and troubleshooting.
  • Patch management.
  • Backup and restore operations.
  • Day-to-day operational support and maintenance.

Documentation Management

Maintain and update documentation to improve visibility and operational efficiency of the AWS environment, including:

  • System architecture diagrams
  • Operational procedures (Runbooks)
  • Change logs
  • Asset inventory and configuration management records

Cloud Architecture Support

Collaborate with Cloud Architects and Senior Engineers to support the design of AWS architectures that deliver:

  • Security
  • High availability
  • Fault tolerance
  • High performance
  • Cost optimization

Additional responsibilities include:

  • Participating in architecture reviews
  • Contributing to technical planning activities
  • Conducting Proofs of Concept (PoCs)
  • Supporting cloud migration projects
  • Reviewing existing AWS environments and recommending improvements in:
    • Reliability
    • Security
    • Performance
    • Maintainability
    • Cost efficiency

Terraform & Infrastructure as Code (IaC)

  • Develop an understanding of the existing Terraform environment, including:
    • Module structure and management
    • State management
    • Variable management
    • Deployment workflows
  • Modify and improve Terraform code through a review-based development process.
  • Support infrastructure standardization and version control.
  • Gradually take ownership of Terraform environment maintenance and enhancement.
  • Participate in safe infrastructure change management processes, including:
    • Change planning
    • Peer reviews
    • Testing
    • Rollback planning
    • Documentation updates
  • Improve operational efficiency through automation and scripting.
  • Enhance operational processes using Git-based workflows.

Reliability, Security & Communication

  • Monitor cloud resources and infrastructure.
  • Investigate incidents and service disruptions.
  • Respond to operational incidents.
  • Perform Root Cause Analysis (RCA).
  • Implement preventive measures to avoid recurrence.
  • Apply AWS security best practices, including:
    • Least-privilege IAM design
    • Network segmentation
    • Encryption
    • Log management
    • Secure access controls
  • Collaborate with IT, Security, Application, and Business teams.
  • Document technical decisions and architecture rationale.
  • Escalate risks and issues proactively when necessary.

Required Qualifications

  • 2+ years of hands-on experience in IT infrastructure, cloud operations, systems administration, DevOps, or related fields.
  • Practical experience and knowledge of key AWS services:
    • Amazon EC2
    • Amazon VPC
    • AWS IAM
    • Amazon S3
    • Security Groups
    • Amazon Route 53
    • Amazon CloudWatch
  • Foundational networking knowledge.
  • Basic understanding of cloud architecture principles:
    • Availability
    • Scalability
    • Resilience
    • Security
    • Cost optimization
  • Foundational experience with Infrastructure as Code (Terraform experience preferred).
  • Experience using Git.
  • Experience working in Pull Request / Merge Request-based development workflows.
  • Ability to investigate incidents and analyze logs.
  • Experience performing operational tasks according to Runbooks and documented procedures.
  • Strong documentation skills.
  • Self-motivated with a strong willingness to learn.
  • Experience maintaining architecture diagrams, SOPs, change records, and asset inventories.
  • Business-level proficiency in either Japanese or English.
  • Basic conversational ability in the other language, with a commitment to ongoing language development.
  • Ability to support occasional evening or weekend maintenance activities when required.

Preferred Qualifications

  • AWS Certifications such as:
    • AWS Certified Solutions Architect - Associate
    • AWS Certified Cloud Practitioner
    • Or currently working toward obtaining these certifications
  • Experience operating Terraform in a team environment, including:
    • Module management
    • Remote State management
    • Provider version control
    • Code review processes
  • Understanding of the AWS Well-Architected Framework.
  • Experience with AWS networking technologies:
    • VPN
    • Hybrid connectivity
    • DNS
    • Security Groups
    • Network ACLs (NACLs)
    • AWS Transit Gateway
  • Experience with monitoring and logging platforms:
    • Amazon CloudWatch
    • Prometheus
    • Grafana
    • ELK Stack
    • Datadog
  • Experience developing automation scripts using Bash, Python, or PowerShell.
  • Bilingual proficiency in Japanese and English.
  • Interest in leveraging AI/LLM tools to improve operational efficiency, including:
    • Documentation generation
    • Incident investigation and troubleshooting
    • Infrastructure as Code development support

<職務内容/役割・責任>

Astroscaleでは、AWSクラウド環境の運用・保守を担当しながら、将来的に設計業務へも携わるジュニアクラウドアーキテクトを募集しています。

本ポジションは、AWSインフラの基礎知識を持ち、将来的にクラウドアーキテクトへの成長を目指す方を対象とした育成型ポジションです。

入社後は現在のAWS環境の理解と運用サポートからスタートし、日々のインフラ運用を担当しながら、シニアメンバーの指導のもとでアーキテクチャ設計に参画していただきます。また、Terraformを活用したInfrastructure as Code(IaC)の運用・管理についても徐々に責任範囲を広げていただきます。

技術的な責任範囲、アーキテクチャ設計能力、ビジネス理解を深めることで、将来的には**Cloud Architect(クラウドアーキテクト)**としての活躍を期待しています。

主な業務内容

AWSインフラ運用

・AWS環境の理解、運用およびサポート

・以下のAWSサービスの管理・運用

EC2

VPC

IAM

S3

Security Groups

Route 53

VPN/接続基盤

その他関連インフラサービス

・AWS環境のプロビジョニング支援

・設定管理

・モニタリング

・障害対応・トラブルシューティング

・パッチ適用

・バックアップ/リストア

・日常運用保守

ドキュメント整備

以下を維持・更新し、AWS環境の可視化と運用性向上を支援します。

システム構成図

運用手順書(Runbook)

変更履歴

資産管理台帳

クラウドアーキテクチャ支援

・クラウドアーキテクトやシニアエンジニアと協力し、以下を実現するAWSアーキテクチャ設計を支援

セキュリティ

高可用性

耐障害性

高性能

コスト最適化

・アーキテクチャレビューへの参加

・技術計画策定への参画

・PoC(概念実証)の実施

・クラウド移行プロジェクトの支援

・既存AWS環境のレビューおよび改善提案

信頼性向上

セキュリティ強化

性能改善

保守性向上

コスト削減

Terraform・Infrastructure as Code(IaC)

・既存Terraform環境の理解モジュール

State管理

変数管理

デプロイワークフロー

レビューを前提としたTerraformコードの修正・改善

インフラ構成の標準化とバージョン管理

Terraform環境の保守・改善業務を段階的に担当

安全なインフラ変更プロセスの実施変更計画

ピアレビュー

テスト

ロールバック計画

ドキュメント更新

・自動化やスクリプト活用による作業効率化

・Gitを活用した運用改善

信頼性・セキュリティ・コミュニケーション

・クラウドリソースの監視

・障害調査

・インシデント対応

・根本原因分析(RCA)

・再発防止施策の実施

・AWSセキュリティベストプラクティスの適用

IAM最小権限設計

ネットワーク分離

暗号化

ログ管理

セキュアアクセス管理

・IT、セキュリティ、アプリケーション、ビジネス部門との連携

・技術判断や決定事項の文書化

・リスクや課題の早期エスカレーション

<必須条件>

・ITインフラ、クラウド運用、システム管理、DevOps等の実務経験2年以上

・AWS主要サービスの実務経験・知識EC2

VPC

IAM

S3

Security Groups

Route 53

CloudWatch

・ネットワーク基礎知識

・クラウドアーキテクチャの基本理解

可用性

スケーラビリティ

レジリエンス

セキュリティ

コスト最適化

・Infrastructure as Codeの基礎経験Terraform経験歓迎

Gitの利用経験

・Pull Request/Merge Requestベースの開発プロセス経験

・障害調査およびログ分析能力

・Runbookに従った運用対応経験

・文書作成能力

・学習意欲が高く主体的に取り組める方

・構成図、SOP、変更履歴、資産台帳などの整備経験

・日本語または英語のビジネスレベル

・もう一方の言語の基礎会話力と継続的な学習意欲

・必要に応じて週末・夜間メンテナンス対応が可能な方

<望ましい条件>

・AWS認定資格AWS Certified Solutions Architect - Associate

AWS Certified Cloud Practitioner

または同資格取得に向けた学習中の方

・チーム環境におけるTerraform運用経験

モジュール管理

Remote State

Providerバージョン管理

コードレビュー

・AWS Well-Architected Frameworkの理解

・AWSネットワーク関連経験

VPN

ハイブリッド接続

DNS

Security Groups

NACL

Transit Gateway

・監視・ログ管理ツール利用経験CloudWatch

Prometheus

Grafana

ELK

Datadog

・Bash、Python、PowerShellによる自動化スクリプト作成経験

・日本語・英語のバイリンガル

・AI/LLMツールを活用した業務改善への関心

ドキュメント作成

障害調査

Infrastructure as Code開発支援

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