Autonomous Web Engineer for Kiro Platform

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

Job summary

Amazon Development Center U.S., Inc. in Seattle is seeking software engineers to help build Kiro, a frontier developer tool that autonomously tackles tasks and learns from work.

You will join a team solving novel problems at the intersection of AI and software engineering, delivering scalable, reliable systems. From day one you will ship features, participate in code reviews, mentor peers, and have opportunities to lead projects, define technical direction, and shape how the team operates.

Qualifications

• 3+ years of non-internship professional software development experience
• 2+ years of non-internship design or architecture (design patterns, reliability and scaling) of new and existing systems experience
• 1+ years of software development engineer or related occupational experience
• 1+ years of designing and developing large-scale, multi-tiered, multi-threaded, embedded or distributed software applications, tools, systems, and services using: C#, C++, Java, or Perl experience
• 1+ years of Object Oriented Design experience
• Bachelor's degree or foreign equivalent in Computer Science, Engineering, Mathematics, or a related field
• Experience programming with at least one software programming language
• 3+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
• Bachelor's degree in computer science or equivalent

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 (crash recovery, session resume, stale PID handling)
• 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 multi-platform distribution system — metadata services, platform detection, CDN configuration (CloudFront), custom channel authorization, and 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

Software development

Architecture/design

Distributed systems

OO design

Programming languages

Education

Bachelor's degree in CS/Engineering/Math

Job description

Amazon Development Center U.S., Inc. in Seattle is seeking software engineers to help build Kiro, a frontier developer tool that autonomously tackles tasks and learns from work.

You will join a team solving novel problems at the intersection of AI and software engineering, delivering scalable, reliable systems. From day one you will ship features, participate in code reviews, mentor peers, and have opportunities to lead projects, define technical direction, and shape how the team operates.