SDE II: Agentic AI Platform Engineer

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

Benefits offered by this job

Health insurance

401(k) matching

Paid time off

RSUs

Job summary

Amazon.com Services LLC is hiring an SDE-II to own core PIXIE platform subsystems in a greenfield environment. You will design and build production systems at the intersection of LLMs, multi-agent orchestration, and large-scale data retrieval.

You will implement authorization-aware retrieval, evaluation harnesses, and reliable operation with on-call duties, reporting to an autonomous team of eight engineers. Join a startup-like effort inside Amazon with large-scale data and governance.

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.

Responsibilities

• Design, build, and operate core platform services for PIXIE's agentic AI system — including agent runtime, caching/cost-latency optimization, observability, and evaluation infrastructure.
• Build and maintain the tool/agent registry that enables new capabilities to be discovered and invoked without redeployment.
• Develop automated evaluation and regression harnesses for non-deterministic LLM outputs — hallucination detection, drift monitoring, and faithfulness scoring.
• Implement authorization-aware retrieval ensuring users never see content they aren't entitled to.
• Collaborate with Scientists on grounding methodology, causal analytics productionization, and retrieval-quality optimization.
• Operate what you build — on-call rotation, runbooks, operational dashboards, and continuous improvement of system reliability.
• Mentor teammates on system design, code quality, and operational best practices.

Skills

Distributed systems

OO design

Architecture design

Programming languages experience

Education

Bachelor's degree in Computer Science, Engineering, Mathematics, or related field

Tools

C#

C++

Java

Perl

Job description

Amazon.com Services LLC is hiring an SDE-II to own core PIXIE platform subsystems in a greenfield environment. You will design and build production systems at the intersection of LLMs, multi-agent orchestration, and large-scale data retrieval.

You will implement authorization-aware retrieval, evaluation harnesses, and reliable operation with on-call duties, reporting to an autonomous team of eight engineers. Join a startup-like effort inside Amazon with large-scale data and governance.