Software Development Engineer III, AZA (Gen AI)

Aza is Amazons primary internal AI assistant serving 1.5M employees globally across HR IT pay benefits and workplace domains. Were not wrapping an LLM with a chat UI were building a full-stack agentic platform: 60 production sub-agents multi-turn orchestration real-time skill routing MCP-based tool integrations and enterprise-grade evaluation systems.
Were looking for an SDE-II who wants to build AI-native systems from the ground up.

What makes this role unique:
* Youll build the agent not just use one. Aza 2.0 is built on Strands SDK with dedicated ECS Fargate compute custom orchestration and a plugin architecture spanning 60 sub-agents. Youll own real components of this system.
* Greenfield Gen AI engineering. Were actively shipping: agentic inline workflows voice-enabled agents RAG pipelines progressive skill loading and a self-service developer platform for 50 away teams building on Aza.
* Complex high-stakes domain. Aza handles questions about pay benefits leave HR policies across every jurisdiction Amazon operates in. Correctness matters. This is where AI reasoning meets real-world constraints.
* Scale that doesnt exist elsewhere. Millions of conversations monthly. Sub-3-second response latency. Production reliability with Sr. PE-level architectural standards.
* Visibility and mentorship. SVP-level visibility Sr. PE driving architectural vision and a fast-shipping team where engineers own end-to-end features in production.

Key job responsibilities
1. Design and build agentic systems: orchestration skills sub-agents MCP tools evaluation frameworks
2. Ship features end-to-end from design through production deployment
3. Work across the stack: LLM integration distributed systems real-time APIs infrastructure-as-code
4. Collaborate with Sr. PE PEs and Sr. engineers on architecture decisions that shape the platforms future

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

- 5 years of full software development life cycle including coding standards code reviews source control management build processes testing and operations experience
- Bachelors degree in computer science or equivalent

Amazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status disability or other legally protected status.

Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process including support for the interview or onboarding process please visit for more information. If the country/region youre applying in isnt listed please contact your Recruiting Partner.

The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience qualifications and location. Amazon also offers comprehensive benefits including health insurance (medical dental vision prescription Basic Life & AD&D insurance and option for 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 WA Bellevue - 168100.00 - 227400.00 USD annually