Job Description

Our client is a fast-growing Japanese technology company developing AI-powered B2B SaaS products that help enterprise customers transform customer engagement, marketing performance, and business operations. The company provides a portfolio of AI-powered communication and customer engagement solutions, including conversational Voice AI, marketing automation, and enterprise communication platforms. Operating in a highly international environment, the company brings together professionals from more than 20 nationalities across Japan and overseas offices. As the company continues expanding its product portfolio and international operations, it is strengthening its Cloud Engineering organization to ensure the reliability, scalability, and operational efficiency of its SaaS platforms. The company is currently looking for a Senior Cloud Engineer to support cloud infrastructure operations, system monitoring, troubleshooting, and continuous improvements across its growing product portfolio. Position Overview Annual Salary: JPY 5,000,000 – 8,000,000 Location: Tokyo (Aoyama) or Osaka Working Style: Hybrid – Approximately 4 Days Remote / Week (1 Office Day Recommended) Working Hours: Flextime / Core Hours 10:00–16:00 Cloud Experience: Approximately 1–3 Years English / Japanese: Fluency in One Language + Conversational Ability in the Other Employment Type: Full-time / Permanent Employee Technical Focus: AWS, Cloud Infrastructure, Linux, Terraform, Monitoring, CI/CD, DevOps Role Overview As a Senior Cloud Engineer, you will support the operation, maintenance, and continuous improvement of cloud infrastructure supporting the company’s AI-powered SaaS products. The Cloud Engineering team is responsible for maintaining the reliability, scalability, and operational efficiency of both new and existing products, including legacy systems. Working closely with senior engineers, you will manage day-to-day infrastructure operations, implement monitoring improvements, investigate technical issues, and maintain Infrastructure as Code configurations. This position provides an opportunity to strengthen your practical cloud engineering skills while gaining exposure to Infrastructure Engineering, DevOps, and Site Reliability Engineering (SRE). You will collaborate with international engineering teams in a multicultural environment and contribute to the stability and continuous improvement of enterprise SaaS platforms. Key Responsibilities Cloud Infrastructure Operations & Maintenance Operate and maintain cloud infrastructure, primarily on AWS. Perform routine infrastructure maintenance following established procedures. Support infrastructure configuration and operational improvements. Maintain system stability and availability. Collaborate with senior engineers to resolve infrastructure-related issues. Document operational procedures and technical changes. Monitoring & Observability Configure and maintain monitoring and observability tools. Implement monitoring for system metrics, logs, and traces. Improve existing dashboards and alert configurations. Monitor infrastructure health and identify potential issues. Support improvements to system visibility and operational efficiency. Incident Response & Troubleshooting Perform initial incident response, including detection and troubleshooting. Investigate infrastructure issues and identify potential causes. Collaborate with senior engineers during incident investigations. Participate in Root Cause Analysis (RCA) activities. Document incident findings and contribute to postmortem reports. Support preventive measures to reduce recurring incidents. Infrastructure as Code (IaC) Maintain existing Terraform or AWS CDK configurations. Review and understand existing Infrastructure as Code. Implement small infrastructure changes under technical guidance. Support infrastructure automation and configuration management. Follow established engineering standards and best practices. DevOps & CI/CD Operate and maintain existing CI/CD pipelines. Support deployment processes and release operations. Automate repetitive operational tasks. Assist with improvements to development and deployment workflows. Collaborate with engineering teams to improve operational efficiency. Documentation & Team Collaboration Document infrastructure changes, operational procedures, and troubleshooting steps. Share technical findings with team members. Collaborate with senior engineers and other engineering teams. Participate in continuous improvement initiatives. Develop practical knowledge across Infrastructure, DevOps, and SRE. Cloud Engineering Organization The Cloud Engineering organization operates across three interconnected areas: 1. Infrastructure Engineering AWS cloud infrastructure Networking and computing resources Infrastructure operations Cloud cost optimization Security compliance 2. DevOps Engineering CI/CD pipelines Release management Infrastructure automation Developer Experience improvements Engineering tooling 3. Site Reliability Engineering (SRE) Monitoring and observability SLI/SLO management Incident response Error budgets Root Cause Analysis Postmortem processes Engineers are encouraged to collaborate across these areas and continuously expand their technical expertise. Requirements Required Qualifications Cloud Infrastructure Experience Approximately 1–3 years of hands-on experience operating and maintaining cloud infrastructure using AWS or similar cloud platforms. Basic understanding of cloud infrastructure operations and maintenance. Ability to follow established infrastructure procedures and operational guidelines. Linux & Networking Basic Linux server administration skills. Fundamental understanding of networking concepts. Ability to investigate common infrastructure and connectivity issues. Infrastructure as Code Ability to read and understand existing Terraform or similar Infrastructure as Code configurations. Experience making small changes to existing IaC code under guidance. Basic understanding of infrastructure automation concepts. Technical Troubleshooting Basic debugging and troubleshooting skills. Ability to investigate technical issues and communicate findings. Willingness to collaborate with senior engineers when resolving complex problems. Communication Skills Candidates should meet one of the following language combinations: Option 1: Fluent English. Japanese equivalent to approximately JLPT N3 or above. Option 2: Fluent Japanese. Basic business-level English communication skills. The company expects candidates to be fluent in at least one language and capable of communicating in the other. Preferred Qualifications Monitoring & Observability Experience operating monitoring and observability tools such as: New Relic Sentry Amazon CloudWatch Experience maintaining dashboards, alerts, and monitoring configurations. Site Reliability Engineering Experience working with SLI/SLO-based operations. Understanding of SRE principles and reliability engineering practices. Automation & Scripting Experience automating operational tasks using: Python Bash Other scripting languages CI/CD & DevOps Experience operating CI/CD pipelines. Familiarity with GitHub Actions or similar tools. Understanding of deployment automation. Containers & Infrastructure Experience using Docker or similar container technologies. Understanding of container-based application environments. Incident Management Experience participating in incident response or on-call operations. Familiarity with troubleshooting, incident investigation, and postmortem processes. Cloud Cost Management Experience monitoring cloud infrastructure costs. Exposure to cloud cost optimization initiatives. Certifications AWS certifications or other relevant cloud-related certifications. Ideal Candidate We are looking for someone who: Has practical cloud infrastructure experience and wants to develop deeper technical expertise. Enjoys maintaining and improving reliable cloud environments. Can independently handle routine operational tasks. Takes responsibility for assigned work and follows through on commitments. Proactively asks questions when facing unfamiliar technical challenges. Enjoys learning from experienced engineers. Has a structured approach to troubleshooting and problem-solving. Is comfortable documenting technical work and communicating asynchronously. Collaborates effectively with international engineering teams. Is interested in expanding their knowledge across Infrastructure, DevOps, and SRE. Thrives in a multicultural and fast-changing SaaS environment. Benefits Employment Type Full-time / Permanent Position Probation Period: Generally 3 months, with no changes to employment conditions. Salary JPY 5,000,000 – 8,000,000 / year Monthly salary: JPY 420,000 – 670,000. Compensation will be determined based on previous salary, experience, and technical skills. The monthly salary includes a fixed overtime allowance equivalent to 45 hours. Additional overtime compensation is provided for hours exceeding this allowance. Location / Work Style Tokyo or Osaka Candidates may choose their preferred office location. Hybrid working arrangements are available, with approximately one office day per week recommended. Tokyo Office: Aoyama, Minato-ku, Tokyo Osaka Office: Grand Green Osaka, Kita-ku, Osaka Flexible Working Hours Flextime system with core hours from 10:00–16:00. Standard working hours: 9:00–18:00, including a one-hour break. A discretionary working system may apply to employees at certain seniority levels, depending on company regulations. Holidays & Leave Weekends and Japanese national holidays. Year-end and New Year holidays. Summer holidays. Annual paid leave: 10 days granted upon joining, with additional leave based on length of service. Special leave for important personal and family events. Additional health and wellness leave. Additional Benefits Comprehensive social insurance coverage. Transportation allowance. Company-provided laptop. Company-provided mobile phone for eligible positions. Annual employee health checkups. Childcare and parental support programs. Annual learning and development allowance of up to JPY 55,000 for books and seminars. Internal team-building activities and company events. Employee wellness and health support. Performance evaluations based on OKRs. Opportunities to collaborate with international engineering teams. Why Join This Company? Work on AI-Powered SaaS Products Support the infrastructure behind AI-powered communication and customer engagement platforms serving enterprise customers. Develop Your Cloud Engineering Expertise Gain practical experience operating and improving cloud infrastructure while collaborating with experienced engineers. Exposure to Infrastructure, DevOps, and SRE Develop technical skills across multiple engineering disciplines, including cloud operations, automation, observability, and incident management. International Engineering Environment Collaborate with professionals from more than 20 nationalities in a multicultural organization. Flexible Working Style Enjoy hybrid work arrangements, flexible hours, and the option to work from Tokyo or Osaka. Professional Development Benefit from learning allowances, technical knowledge sharing, and opportunities to expand your cloud engineering capabilities.