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 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 DevOps / Infrastructure Engineer to own the infrastructure, deployment, and operational systems behind StartaleApp, 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. StartaleApp 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 SecOps or cloud security background is a major plus.

We care less about specific tools and more about how you engineer:

• Build infrastructure, not just operate it, and own problems from architecture through production.
• Design for high load and partial failure, and automate what repeats.
• Diagnose across the full stack, from Kubernetes and networking to databases and blockchain nodes.
• Treat infrastructure as a product, with users, reliability requirements, and long-term maintenance needs.

• →Own infrastructure architecture and operations for StartaleApp, 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, GitOps, 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 DevOps, 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, GitOps practices, and CI/CD pipeline design.
• Solid networking fundamentals: DNS, load balancing, TLS, service discovery.
• PostgreSQL in production: replication, backups, recovery, performance.
• High-availability design, incident response, root-cause analysis, and capacity planning.
• Hands-on experience operating blockchain infrastructure (nodes, RPC, indexers, validators, or data pipelines) and an understanding of how distributed blockchain networks fail.

• Security: SecOps or cloud security experience, hardening production environments, AWS security services and IAM design.
• Platform breadth: bare-metal operations, Helm or ArgoCD, messaging systems such as Kafka or NATS, observability stacks such as Prometheus, Grafana, Loki, or OpenTelemetry.
• Blockchain depth: operating chain infrastructure at significant scale; Ethereum, Polkadot, or L2 ecosystems.
• Domain: financial, trading, or other latency-sensitive systems; using AI tools in infrastructure workflows; Go, Rust, or TypeScript.