Senior Platform Engineer

Job Description As engineering organization transitions from a monolithic architecture to a service-oriented architecture, the focus of our infrastructure engineering is evolving. Instead of traditional, manual infrastructure management, this role centers on transforming core environments into an advanced, self-serve developer platform. You will build high-level, composable abstractions that automate pipelines, infrastructure, logging, and metrics, allowing product engineers to deploy production services rapidly while safely hiding underlying complexities. Key Responsibilities Self-Serve Platform Engineering: Collaborate with the infrastructure group to build a self-serve platform that enables engineering teams to scale services from inception to production deployment via composable, high-level abstractions. Developer Experience (DX) Advocacy: Treat internal software engineers as your primary customers. Gather direct feedback, isolate operational friction points, and design foundational architectures that teams naturally adopt rather than bypass. Strategic Technology Selection: Actively evaluate, benchmark, and determine the components of the core platform stack, including container orchestration models, end-to-end observability tools, and defining clear boundaries for buy-versus-build technical decisions. Operational Standards: Establish strict institutional benchmarks for infrastructure reliability, systemic visibility, and propagate an engineering-led "you build it, you run it" operational culture. Monolith Deconstruction: Partner directly with cross-functional development groups to facilitate smooth application migrations out of legacy systems into distributed microservices. Team Mentorship: Raise technical execution standards by mentoring engineers, performing comprehensive design and code reviews, and driving technical decisions that safeguard multi-year scalability. Requirements Technical Qualifications: Platform Tooling: Proven experience designing and implementing internal developer platforms or specialized internal tooling that driving widespread engineering adoption. Container Orchestration: Deep production-level containerization experience with Kubernetes systems, specifically handling enterprise-grade networking, RBAC policies, auto-scaling mechanisms, and custom controllers. Infrastructure as Code (IaC) & Pipelines: Strong mastery of Terraform, including writing reusable and modular code configurations. Proficient in architecting scalable pipelines using modern continuous delivery systems (e.g., DroneCI, ArgoCD, GitHub Actions). Cloud Infrastructure: Direct, hands-on architectural experience managing core cloud ecosystems, including advanced identity access management (IAM), virtual private networks (VPC), and managed database endpoints (GCP experience is a welcome addition). Observability Ecosystems: Proven depth optimizing comprehensive telemetry infrastructures across enterprise logging, metric aggregation, and distributed tracing via standard tooling (e.g., Grafana, Prometheus, OpenTelemetry). Systems Security: Advanced knowledge of platform-level networking and security models, including secrets management implementations, secure service-to-service authentication protocols, and software supply chain protection. Stateful Workloads: Comfortable maintaining and provisioning stateful relational and non-relational database storage environments in production setups (e.g., RDS, Aurora, MySQL, MongoDB, Redis, Elasticsearch). Site Reliability Practices: Practical, real-world experience managing structured incident response procedures, participating in production on-call rotations, running blameless post-mortems, and embedding structural cost awareness directly into architecture designs. Core Competencies & Attributes: Communication: Exceptional written and verbal English communication skills Problem Solving: Superior aptitude for decomposing complex, highly ambiguous, and ill-defined technical problems into execution phases without requiring constant structural direction. Leadership Alignment: Strong capacity to mentor peers, define explicit project task frameworks, deliver actionable and constructive feedback, and constructively influence complex architectural strategy across multi-disciplinary engineering teams. Mindset: A proactive, entrepreneurial approach to system reliability combined with an acute sense of engineering ownership, urgency, and an understanding of how technical directions interface with broader corporate goals. Benefits Schedule & Flexibility: Complete flextime system applied with absolutely no core hours enforced. Work Style: Hybrid work configuration based out of Tokyo. Offers the option to work from home, accompanied by a requirement to commute to the office twice a week. Time Off & Leaves: * Complete weekends (Saturdays and Sundays) and national holidays off. 10 days of annual paid vacation provided immediately at the initial time of employment. 6 days of designated Year-end and New Year vacations (December 29 to January 3). Allowances: Full commuter allowance provided, calculated and disbursed in strict accordance with company travel regulations. Insurance & Welfare: Comprehensive social insurance enrollment, comprising complete employment insurance, workers' compensation insurance, health insurance, and welfare pension plans.