Junior Cloud Architect

Astroscale

. Operate, support, and maintain the AWS cloud environment.

Posted 10/20/2026full-timeTokyo • JapanJunior💰 ¥5,000,000 - ¥9,000,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in AWS cloud operations, including EC2, VPC, IAM, and S3, while applying Infrastructure as Code principles using Terraform. Proficient in incident investigation, operational support, and maintaining comprehensive documentation for cloud environments.

Highest-signal resume keywords

AWS Cloud OperationsInfrastructure As CodeTerraform ExperienceIncident InvestigationDocumentation Skills

ATS Keywords

Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills

Amazon EC2Amazon VPCAWS IAMAmazon S3Security GroupsAmazon Route 53Amazon CloudWatchGitNetworking KnowledgeOperational Task Management

Soft Skills

Strong Documentation SkillsCollaborationProblem-Solving

Industry Keywords

Cloud Architecture PrinciplesHigh AvailabilityFault ToleranceCost OptimizationChange Management

Tech Stack

Tools & technologies

AWSCloudEC2Terraform

About the role

Key responsibilities & impact

Operate, support, and maintain the AWS cloud environment.
Administer EC2, VPC, IAM, S3, Security Groups, Route 53, VPN/connectivity infrastructure, and related services.
Assist with AWS environment provisioning, configuration management, monitoring, incident response, troubleshooting, patch management, backup and restore, and daily operational support.
Maintain system architecture diagrams, runbooks, change logs, and asset/configuration records.
Support AWS architecture design with Cloud Architects and Senior Engineers for security, high availability, fault tolerance, performance, and cost optimization.
Participate in architecture reviews, technical planning, proofs of concept, and cloud migration projects.
Review existing AWS environments and recommend improvements to reliability, security, performance, maintainability, and cost efficiency.
Understand, maintain, modify, and improve Terraform and Infrastructure as Code through review-based workflows.
Support infrastructure standardization, version control, change planning, peer reviews, testing, rollback planning, and documentation updates.
Improve operational efficiency through automation, scripting, and Git-based workflows.
Monitor resources, investigate incidents, perform root cause analysis, implement preventive measures, and apply AWS security best practices.
Collaborate with IT, Security, Application, and Business teams; document technical decisions and escalate risks proactively.

Requirements

What you’ll need

2+ years of hands-on experience in IT infrastructure, cloud operations, systems administration, DevOps, or related fields.
Practical experience and knowledge of Amazon EC2, Amazon VPC, AWS IAM, Amazon S3, Security Groups, Amazon Route 53, and Amazon CloudWatch.
Foundational networking knowledge.
Basic understanding of cloud architecture principles: availability, scalability, resilience, security, and 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.
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.