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, security, and operational efficiency of its SaaS platforms. The company is currently looking for an experienced TECH-Lead Cloud Engineer to drive cloud infrastructure strategy, technical improvements, and cross-functional engineering initiatives. Position Overview Annual Salary: JPY 8,000,000 – 11,000,000 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 English: Business Level Required Japanese: JLPT N3 Level or Above Employment Type: Full-time / Permanent Employee Technical Focus: AWS, Cloud Infrastructure, DevOps, SRE, Infrastructure as Code, CI/CD Leadership: Technical Leadership and Cross-Functional Project Management Role Overview As a TECH-Lead Cloud Engineer, you will play a key role in strengthening the cloud infrastructure and engineering foundations supporting the company’s growing portfolio of SaaS products. The Cloud Engineering team is responsible for the infrastructure, reliability, scalability, and operational efficiency of both new and existing products, including legacy systems. You will lead technical initiatives, establish engineering best practices, and collaborate with product development teams to improve system reliability and development productivity. This position combines hands-on cloud engineering with technical leadership, architectural decision-making, and cross-functional collaboration. You will have the opportunity to influence infrastructure strategy, introduce modern engineering practices, and drive measurable improvements across the organization. Key Responsibilities Cloud Infrastructure & Architecture Design, build, operate, and continuously improve cloud infrastructure, primarily on AWS. Lead architectural improvements to enhance system reliability, scalability, and performance. Evaluate infrastructure requirements and propose appropriate technical solutions. Improve cloud resource utilization and infrastructure efficiency. Ensure infrastructure implementations comply with organizational security requirements. Collaborate with security teams to implement appropriate security controls. Site Reliability Engineering (SRE) Improve system reliability and operational stability across SaaS platforms. Define and manage Service Level Indicators (SLIs) and Service Level Objectives (SLOs). Establish and operate error budget management practices. Lead incident response and technical troubleshooting. Develop standardized Root Cause Analysis (RCA) processes. Promote a blameless postmortem culture. Identify recurring operational issues and implement preventive improvements. DevOps & CI/CD Design, develop, and maintain CI/CD pipelines. Improve release management processes and deployment reliability. Automate infrastructure provisioning and operational workflows. Enhance developer productivity and overall Developer Experience (DX). Implement Infrastructure as Code using Terraform, AWS CDK, or similar technologies. Collaborate with development teams to streamline software delivery processes. Observability & Monitoring Design and improve observability platforms covering metrics, logs, and distributed tracing. Implement monitoring and alerting solutions. Improve visibility into application performance and infrastructure health. Support proactive incident detection and troubleshooting. Identify opportunities to improve operational efficiency through monitoring and automation. Cloud Cost Optimization Monitor and analyze cloud infrastructure costs. Identify opportunities to optimize AWS resource utilization. Implement cost optimization strategies while maintaining reliability and performance. Improve cloud cost visibility across engineering teams. Technical Leadership & Cross-Functional Collaboration Develop technical strategies for engineering teams or major projects. Lead technical initiatives with measurable business and engineering outcomes. Drive cross-functional projects involving infrastructure, development, product, and security teams. Make technical decisions regarding architecture, infrastructure, and operational improvements. Coordinate stakeholders and build consensus around technical priorities. Establish engineering standards and share technical knowledge. Create documentation and promote engineering best practices. Cloud Engineering Organization The Cloud Engineering organization operates across three closely connected areas: 1. Infrastructure Engineering AWS cloud architecture Networking and computing infrastructure Cloud cost optimization Security compliance Infrastructure scalability and reliability 2. DevOps Engineering CI/CD pipelines Release management Infrastructure automation Developer Experience improvements Engineering productivity and tooling 3. Site Reliability Engineering (SRE) SLI/SLO management Error budgets Incident response Observability Root Cause Analysis Postmortem processes The company encourages engineers to collaborate across these areas rather than operating in isolated technical teams. Requirements Required Qualifications Cloud Infrastructure Experience Hands-on experience designing, building, and operating cloud-based systems using AWS or similar cloud platforms. Strong understanding of cloud infrastructure and system architecture. Experience improving infrastructure reliability, scalability, and operational performance. Infrastructure as Code Practical experience implementing Infrastructure as Code using Terraform, AWS CDK, or similar technologies. Ability to automate infrastructure provisioning and management. DevOps & CI/CD Experience designing, implementing, and operating CI/CD pipelines. Understanding of DevOps practices and modern software delivery processes. Technical Problem-Solving Advanced debugging and troubleshooting capabilities. Ability to analyze complex technical issues and identify effective solutions. Strong understanding of system architecture and infrastructure dependencies. Technical Leadership Experience making and driving technical decisions at the team or project level. Ability to lead technical initiatives and coordinate implementation. Experience collaborating across departments and building stakeholder alignment. Communication Skills Business-level English communication skills or above. Japanese proficiency equivalent to JLPT N3 or above. Ability to communicate technical concepts clearly to engineering and non-engineering stakeholders. Preferred Qualifications Site Reliability Engineering Experience designing and operating SLIs, SLOs, and error budgets. Experience establishing incident response processes and on-call operations. Knowledge of reliability engineering practices. Observability Experience designing, implementing, or operating observability platforms. Familiarity with monitoring solutions such as: New Relic Sentry Amazon CloudWatch Cloud & Infrastructure Technologies Experience with Docker or similar container technologies. Proven experience optimizing cloud infrastructure costs. Experience implementing security measures and infrastructure security controls. Experience developing automation using scripting languages. Ideal Candidate We are looking for someone who: Has strong hands-on cloud engineering experience combined with technical leadership capabilities. Can evaluate infrastructure challenges from a broader architectural and organizational perspective. Takes ownership of complex technical problems and drives them through resolution. Can independently identify improvement opportunities and propose effective solutions. Has a strong understanding of reliability, scalability, security, and operational efficiency. Enjoys working across Infrastructure, DevOps, and SRE disciplines. Communicates openly and collaborates effectively with international engineering teams. Can structure complex technical information and communicate it clearly. Is comfortable working independently in an asynchronous, documentation-driven environment. Enjoys introducing new technologies and continuously improving engineering practices. Thrives in a multicultural and fast-changing SaaS environment. Benefits Benefits Employment Type Full-time / Permanent Position Probation Period: Generally 3 months, with no changes to employment conditions. Salary JPY 8,000,000 – 11,000,000 / year Monthly salary: JPY 670,000 – 917,000. 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 professional development. Internal team-building activities and company events. Employee wellness and health support. Performance evaluations based on OKRs. Leadership development programs. Opportunities to collaborate with international engineering teams. Why Join This Company? Work on AI-Powered SaaS Products Support the infrastructure behind innovative AI-powered communication and customer engagement platforms serving enterprise customers. Influence Cloud Engineering Strategy Take ownership of major infrastructure initiatives and help shape engineering standards, architecture, and operational practices. Combine Infrastructure, DevOps, and SRE Work across multiple engineering disciplines and contribute to improvements throughout the entire SaaS product portfolio. 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, leadership development opportunities, and exposure to modern cloud engineering technologies.