Senior DevOps​/Infrastructure Engineer; Americas, US time zones

Startale builds onchain finance as a vertically integrated stack: the chains, a JPY stablecoin, payments, and a consumer app. With SBI Group we are building

• Full time

Startale builds onchain finance as a vertically integrated stack: the chains, a JPY stablecoin, payments, and a consumer app. With SBI Group we are building Strium
, a fully onchain exchange; we issued JPYSC
, Japan's first trust-licensed JPY stablecoin; with Sony Group we operate Soneium
; and Startale App
, used by 210k monthly users, is the front door to all of it. We raised a ~$63M Series A from Sony, SBI and others. The team is ~70 people across 20 nationalities, and English is the working language of engineering.

Our engineering team is spread across Asia and Europe. This role anchors infrastructure coverage in US hours: you will be the infrastructure owner awake when most of the team is not. You must be physically based in a US time zone (UTC-8 to UTC-5), whether in the US, Canada, or Latin America. Working US hours from another region does not qualify.

We are looking for a Senior Dev Ops / Infrastructure Engineer to own the infrastructure, deployment, and operational systems behind Startale App, Strium, and other products across the Startale ecosystem. This is a senior, hands-on role: you design, build, and operate production infrastructure end to end, from cloud and Kubernetes to CI/CD, databases, observability, and security.

You will work primarily on two demanding products. Startale App is a user-facing Web3 wallet and application platform whose backend combines traditional cloud services and databases with blockchain nodes, indexers, and transaction processing. Strium, built with SBI Group, is a next-generation decentralized exchange bringing Japanese equities onchain, with a fully onchain order book and a consensus layer purpose-built for low-latency, high-throughput trading.

Both run under high load, strict availability and security requirements, and real production conditions. We want someone who builds infrastructure rather than maintains it: comfortable making architectural decisions, automating everything that repeats, and diagnosing complex production issues. Experience running blockchain infrastructure is a significant advantage, and a Sec Ops or cloud security background is a major plus.

• Own infrastructure architecture and operations for Startale App, Strium, and other production systems.
• Design, build, and operate highly available cloud infrastructure on AWS:
  Kubernetes clusters, networking, storage, scaling, upgrades.
• Manage everything as code:
  Terraform, Git Ops, and CI/CD pipelines with safe rollouts and rollback.
• Operate PostgreSQL in production: availability, replication, backups, performance, recovery.
• Build observability across infrastructure, applications, databases, and blockchain nodes, with alerting that catches incidents early.
• Run blockchain infrastructure (nodes, RPC services, indexers) and monitor it down to protocol level: sync, connectivity, transaction processing.
• Design disaster recovery and failover for critical systems, and harden security: access control, secrets, vulnerability management, monitoring.
• Diagnose production incidents across the full stack, and remove operational bottlenecks with automation instead of manual procedure.

• 5+ years in Dev Ops, SRE, platform, or infrastructure engineering.
• A track record of building and operating production infrastructure for highly available systems, where availability directly affected users or the business.
• Deep hands-on Kubernetes, AWS, and Linux experience.
• Infrastructure as code with Terraform, Git Ops practices, and CI/CD…