Backend Software Engineer, Collaboration Runtime

The Collaboration Runtime team is moving from a board-centric monolith to a decoupled Collaboration Engine to enable "ubiquitous collaboration" across the entire company. As a Mid-level Engineer, you will be a key builder of this new platform, helping us solve the "legacy bottleneck" by implementing reusable real-time components that work for any app, from AI History to Dashboards. This role is open because we are scaling our infrastructure to support high-load, stateful applications beyond our traditional board use cases. You will be responsible for building the high-performance gRPC and WebSocket "plumbing" that makes real-time interaction seamless for millions of users.

What You'll Do

• Implement core features of the Collaboration Engine and the Broadcast Application to ensure the AI History use case is production-ready by the end of Q1
• Develop and optimize gRPC streaming support (unary, bidi, and server-side) within the collaboration proxy to enable complex real-time data flows
• Build out the Application & Server Registry, enabling discovery and routing for new services like the CIS "live updates" dashboard
• Execute the rollout of connection multiplexing between the RTC Gateway and application servers to improve system efficiency and scale
• Write high-concurrency code in Java/Kotlin to manage WebSocket transport paths and ensure low-latency real-time client connectivity
• Partner with AI and Platform teams to integrate their services with the Engine, ensuring high reliability and 99.9% uptime

• Strong proficiency in Java or Kotlin, with a solid grasp of multithreading and JVM performance
• Practical experience building and maintaining high-load distributed systems or microservices
• Hands-on experience working with WebSockets and gRPC for real-time data transport
• Familiarity with concurrency patterns and the ability to debug complex, stateful application issues
• Ability to translate technical requirements into clean, testable code that integrates with complex backend proxies
• Effective communication skills to collaborate with partner teams on API definitions and service integrations

Miro is an online collaborative whiteboard platform that enables distributed teams to work effectively together, from running brainstorming sessions and workshops to planning projects, from designing new products and services to facilitating agile ceremonies.

Miro is trusted by Dell, Cisco, Deloitte, Okta, Shopify, and many more global companies of all sizes. Miro, co-headquartered in San Francisco and Amsterdam, serves more than 50M+ users worldwide, including more than 100,000 client organizations and 95% of the Fortune 100. Miro was founded in 2011 and currently has more than 1,700 employees in 12 hubs around the world. To learn more, please visit www.miro.com.