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Sr. Software Development Engineer, Kiro Web

Amazon Web Services (AWS) · Seattle, WA · 2 mo ago
ConsultingFull-time

AWS is building Kiro — a frontier AI-powered development environment that autonomously tackles development tasks, maintains context across interactions, and continuously learns from its work. We're looking for a Senior Software Development Engineer to be a technical leader on the Kiro Web team, owning the full-stack architecture of a genuinely novel system: a web application that orchestrates teams of AI agents collaborating on code in real time.

About the role

You’ll make critical architectural decisions for a web application that includes dynamic topology control, inter-agent communication, streaming visual interfaces, and tool approval workflows — all built on the Agent Client Protocol (ACP). Key challenges include:

  • Scaling the process-per-session model as users run dozens of concurrent agents
  • Designing state synchronization between server-side ACP processes and browser-side React stores
  • Architecting the multi-agent team orchestration layer to allow dynamic activation/deactivation of agents and runtime topology modifications
  • Building enterprise features (multi-tenant, RBAC, usage metering) without compromising the localhost-first simplicity that makes Kiro Web fast and ergonomic

As a technical leader, you’ll mentor engineers, lead design reviews, drive cross-team initiatives with the Kiro CLI and Kiro IDE teams, and translate ambiguous product requirements into concrete systems. You’ll tackle novel problems in multi-agent orchestration UIs, defining the team’s technical trajectory.

About the team

Kiro Web builds the browser-based experiences and orchestration platform for Kiro, including:

  • Kiro Web: A full-featured local web application for managing AI coding agent sessions with real-time streaming, multi-agent team orchestration, dynamic topology control, tool approval, diff views, and session resume
  • kiro.dev: The public portal for downloads, documentation, changelog, and pricing (Harmony)
  • Emerging enterprise console experiences

Our stack: React 19, TypeScript, Vite, Fastify, Node.js 22, TailwindCSS v4, Zustand, WebSockets, JSON-RPC 2.0, pnpm monorepo. The team consists of ~15 engineers across Seattle and Portland, building a new category of developer tool interfaces.

Requirements

  • 5+ years of non-internship professional software development experience
  • 5+ years of programming experience with at least one software programming language
  • 5+ years of experience leading design or architecture (design patterns, reliability, and scaling) of new and existing systems
  • Experience as a mentor, tech lead, or leading an engineering team

Preferred Qualifications

  • 5+ years of full software development life cycle experience, including coding standards, code reviews, source control management, build processes, testing, and operations
  • Bachelor’s degree in computer science or equivalent

Pay

Base salary range: $168,100 – $227,400 USD annually (Seattle, WA). Final compensation includes sign-on payments, restricted stock units (RSUs), and is determined by experience, qualifications, and location.

Benefits

  • Comprehensive health insurance (medical, dental, vision, prescription, basic life & AD&D, supplemental life plans, EAP, mental health support, medical advice line)
  • Flexible Spending Accounts
  • Adoption and surrogacy reimbursement coverage
  • 401(k) matching
  • Paid time off and parental leave

Learn more about our benefits at amazon.jobs/en/benefits.

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