Principal Software Engineer, Amazon Traffic Engineering

Amazon · Retail & E-commerce

Hyderabad, Telangana, India
On-site
Posted today
Software Engineering
full-time

About the job

At Unified Auth, we build the trust infrastructure that secures how every service, employee, and AI agent at Amazon proves who they are and what they are allowed to do. Our systems operate as Tier 0 infrastructure across more than 50,000 applications, authenticating and authorizing billions of interactions across Amazon's service graph while absorbing evolving security, privacy, and compliance demands so builders can focus on their business logic. We are the single SDK and fabric behind CloudAuth, the product that lets teams enforce least privilege access at SDO scale.

We are seeking a Principal Software Development Engineer to own the SDK and builder experience through which the entire company adopts Unified Auth. You will set the multi-year technical strategy and architecture for a single SDK spanning six languages and the end-to-end builder journey, and you will define how Amazon does authentication and authorization in the emerging era of AI agents. You will have significant autonomy to shape the technical direction across our platforms, focusing on:

Designing SDKs and developer experiences adopted with near zero friction by thousands of teams and their coding agents

Delivering resilience so authentication is never the reason a service is slow or unavailable, even at tens of millions of transactions per second

Establishing verifiable agent identity and per action authorization for agentic workloads

Aligning our trust context model with emerging industry standards and with AWS

Pioneering secure by default platforms and AI native on-boarding

Key job responsibilities

Technical Architecture and Innovation

Design and evolve the client SDK and builder experience across six languages and multiple runtimes

Architect static stability so services retain a 24-hour operating runway when the auth service is impaired

Build verifiable, composite agent identity and per action authorization for agentic workloads

Align the SDK and CloudAuth with industry standards such as OAuth, OIDC, and agent identity specifications

Drive high-performance systems meeting tier 0 availability and low latency requirements

Lead adoption of proven and emerging technologies to reduce cost and complexity

Technical Leadership

Provide architectural guidance across many teams and set the engineering standard through designs and reference implementations

Partner with senior leadership on technical strategy and roadmap

Mentor engineers and leaders to elevate technical excellence

Collaborate with Principal Engineers and partner organizations, including AWS

Lead complex technical initiatives spanning multiple organizations

Impact and Scope

Shape how every human, service, and agent interaction at Amazon is authenticated and authorized

Remove undifferentiated security effort for thousands of builders Influence technical direction across the organization and the broader industry

Retire legacy infrastructure and modernize the platform without disrupting live traffic

A day in the life

You spend your day at the intersection of deep technical work and broad influence. You might review an SDK design for a new language, debug a static stability edge case with an engineer, and then shift to aligning two partner teams and AWS on how agent identity should propagate across the call graph. You write and review the designs and reference implementations that set the standard, you clarify ambiguity for teams navigating a fast-evolving landscape, and you make the architectural calls whose impact reaches the entire company. You are hands on where it matters and a force multiplier everywhere else, leaving Amazon's trust infrastructure simpler, safer, and easier to build on than you found it.

Basic qualifications

10+ years of non-internship professional software development experience

Knowledge of object-oriented design, data structures, and algorithms

Preferred qualifications

Experience designing and building large-scale systems in a multi-tiered, distributed environment (Service Oriented Architecture)

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