Backend SDE: AI-Powered Development Orchestration

Amazon; Seattle (WA); On-site; USD 144,000 - 194,000; Full time

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

Parental leave

Job summary

Amazon Development Center U.S., Inc. in Seattle is seeking a Software Development Engineer to build the server-side systems powering Kiro Web, including backend services, ACP client adapter, and REST APIs.

You’ll own the architecture for per-session processes, WebSocket fan-out, and multi-agent orchestration, delivering scalable, multi-platform distribution and reliable server performance for millions of developers.

Qualifications

• 3+ years of non-internship professional software development experience.
• 2+ years of non-internship design or architecture experience (design patterns, reliability and scaling).
• 1+ years of software development engineer or related occupational experience.
• 1+ years of designing and developing multi-tiered, distributed software applications, tools, systems, and services.

Responsibilities

• Build and maintain the Kiro Web server (Fastify/Node.js/TypeScript) — session manager, ACP client adapter, WebSocket gateway, and REST API.
• Implement the process-per-session architecture: spawning kiro-cli ACP child processes, managing JSON-RPC 2.0 communication over stdin/stdout, and handling lifecycle events.
• Build the multi-agent team orchestration layer — team session lifecycle, inter-agent prompt routing with topology validation, parallel dispatch, and skill injection.
• Design and implement the WebSocket fan-out system that multiplexes notifications from multiple ACP processes onto browser clients, tagged by session/team/role.
• Build and operate Kiro's distribution system — metadata services, platform detection, CDN configuration, release automation.
• Implement tool approval interception: hold execution when agents request permissions, emit approval requests to the frontend, and relay user decisions back to the agent.
• Write comprehensive tests, build monitoring/alerting, and participate in on-call rotations.
• Contribute to API design, architecture reviews, and team technical direction.

Skills

3+ years software development

2+ years design/architecture

1+ years distributed systems

1+ years OO design

Education

Bachelor's degree in Computer Science, Engineering, Mathematics

Job description

Amazon Development Center U.S., Inc. in Seattle is seeking a Software Development Engineer to build the server-side systems powering Kiro Web, including backend services, ACP client adapter, and REST APIs.

You’ll own the architecture for per-session processes, WebSocket fan-out, and multi-agent orchestration, delivering scalable, multi-platform distribution and reliable server performance for millions of developers.