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About the Role

As the engineering organization transitions from a monolithic architecture to a service-oriented architecture, 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.

Responsibilities

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.
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.
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.
Establish strict institutional benchmarks for infrastructure reliability, systemic visibility, and propagate an engineering-led "you build it, you run it" operational culture.
Partner directly with cross-functional development groups to facilitate smooth application migrations out of legacy systems into distributed microservices.
Raise technical execution standards by mentoring engineers, performing comprehensive design and code reviews, and driving technical decisions that safeguard multi-year scalability.

Requirements

Proven experience designing and implementing internal developer platforms or specialized internal tooling that driving widespread engineering adoption.
Deep production-level containerization experience with Kubernetes systems, specifically handling enterprise-grade networking, RBAC policies, auto-scaling mechanisms, and custom controllers.
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).
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).
Proven depth optimizing comprehensive telemetry infrastructures across enterprise logging, metric aggregation, and distributed tracing via standard tooling (e.g., Grafana, Prometheus, OpenTelemetry).
Advanced knowledge of platform-level networking and security models, including secrets management implementations, secure service-to-service authentication protocols, and software supply chain protection.
Comfortable maintaining and provisioning stateful relational and non-relational database storage environments in production setups (e.g., RDS, Aurora, MySQL, MongoDB, Redis, Elasticsearch).
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.
Exceptional written and verbal English communication skills.
Superior aptitude for decomposing complex, highly ambiguous, and ill-defined technical problems into execution phases without requiring constant structural direction.
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.
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.

Skills

Kubernetes
Terraform
DroneCI
ArgoCD
GitHub Actions
GCP
Grafana
Prometheus
OpenTelemetry
RDS
Aurora
MySQL
MongoDB
Redis
Elasticsearch

Location

Tokyo

Work Type

Hybrid

Benefits

Complete flextime system with no core hours enforced.
Option to work from home, with a requirement to commute to the office twice a week.
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).
Full commuter allowance provided.
Comprehensive social insurance enrollment, comprising complete employment insurance, workers' compensation insurance, health insurance, and welfare pension plans.