Software Development Engineer II, Weblab WEX, Weblab WeX

Shape how billions of customers experience Amazon. Weblab powers the A/B testing behind every major feature launch across Prime Alexa and moremaking it one of the most critical services in the company. Your favorite feature on the website or the iOS and Android apps was probably tested and launched using Weblab. Amazon retail Music Prime Alexa Video and many other groups use Weblab every day to change how the world shops sells reads learns and plays.

We are seeking a skilled and creative software engineer to help shape the future of Amazons customer vendor seller and partner experiences.

Key job responsibilities
You have an entrepreneurial spirit and want to make a big impact on Amazon and its customers. You are excited about systems programming and building out one of the largest control planes at Amazon. You invent simple solutions to complex problems working on high-performance and high-scale systems. You develop strong working relationships and thrive in a collaborative team environment across engineering science and product. You enjoy partnering with thousands of builder teams across Amazon.


- Design and implement high-performance SDKs in Rust and C
- Build and maintain control plane infrastructure serving thousands of services
- Collaborate with partner teams to integrate Weblab into their systems
- Contribute to architectural decisions for AI-agent compatibility

A day in the life
Weblab helps Amazon make better decisions by powering A/B-testing in thousands of systems across the WeX team we provide the technology and integration that builders need within their environments including SDKs MCP and daemons. As a team we look out for one another and push towards simple solutions that can scale massively and be operated effectively at that scale.

About the team
A few problems well be working on:
- Using systems programming languages like Rust and C to create a control plane that spans mobile backend and desktop services.
- Integrating thousands of services through MCP APIs and SDKs.
- Thinking ahead to how to provide a safe control plane within a world of AI agents.
- Adding features to support new forms of experimentation such as adaptive experimentation driven by traditional methods and AI

- 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
- Bachelors 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
- Experience with Android or iOS programming
- Experience in systems programming in Rust C or C.

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 Seattle - 143700.00 - 194400.00 USD annually