Staff Software Engineer — Java / Spring Platform

• Real platform ownership at scale. This is a Staff-level IC role with genuine architectural authority over a system processing millions of rate decisions daily - the scope and the stakes are real.
• AI-augmented engineering at the frontier. With Claude Code, Claude MPM, and 82+ in-house MCP tools already in production, you'll be pioneering what AI-first platform engineering looks like - not experimenting with it in isolation.
• A technically consequential modernisation. The monolith-to-microservices migration is live and the platform is in motion - you'll be making architectural decisions that shape how Duetto builds software for years.
• Cross-continental technical influence. You'll mentor and set standards across US and European engineering teams - Staff-level impact without the management overhead.
• Modern stack at real scale. Java/Spring, AWS Kinesis, MongoDB, OpenTelemetry, Terraform, Datadog - tools selected for the problem, used on systems that matter.

Duetto's core Java/Spring platform processes millions of rate decisions daily across thousands of hotels worldwide - and this role owns its architecture and evolution. As Staff Software Engineer on the Dev Platform team, you'll drive domain decomposition, define service boundaries, and lead the modernisation of a high-throughput, multi-tenant system that sits at the heart of everything Duetto ships. You'll also be at the frontier of how AI-augmented engineering works in practice - pioneering workflows using Claude Code, Claude MPM, and Duetto's in-house MCP server platform across US and European engineering teams.

• You'll own the architecture and technical roadmap of Duetto's Java/Spring monolith - driving domain decomposition, defining service boundaries, and leading platform modernisation initiatives that improve modularity, reliability, and developer experience at scale.
• You'll design and build event-driven data flows using AWS Kinesis, SQS/SNS, and the Spring Cloud Stream processing framework, and improve the GraphQL API layer and backend services powering hotel pricing, inventory, and demand management across 80+ PMS/CRS integrations.
• You'll operate and tune MongoDB, Redis (Redisson), and PostgreSQL for performance and reliability in a high-throughput, multi-tenant environment - and strengthen platform observability through OpenTelemetry, Datadog, Prometheus, Grafana, and Sentry instrumentation.
• You'll pioneer AI-augmented engineering workflows using Claude Code, Claude MPM, and Duetto's in-house MCP server platform (82+ tools) - setting the standard for how AI-assisted development works across US and European engineering teams.
• You'll drive architecture decisions through design docs and RFCs, establishing patterns for schema evolution, contract testing, and observability across the platform - influencing technical direction without needing formal authority to do it.
• You'll mentor engineers across US and EU teams, raising the bar for code quality, system design, and technical standards in a globally distributed engineering organisation.

• Location: Remote (Croatia)
• Team: Dev Platform

You don't need a hospitality background. If you're a deep Java systems engineer with strong architectural instincts, event-driven experience, and genuine excitement about AI-augmented development at scale - we'd love to hear from you.