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Senior Software Engineer Sunnyvale, CA - Onsite

Job in Sunnyvale, Santa Clara County, California, 94087, USA
Listing for: ESR Healthcare
Full Time position
Listed on 2026-01-01
Job specializations:
  • Software Development
    Software Engineer, React.js
Job Description & How to Apply Below
Senior Software Engineer

Sunnyvale, CA - Onsite
Duration | Long Term

Job Responsibilities:

• Research, guide, and execute frontend architecture changes, including but not limited to Graph

QL, server-side React rendering, and Flow typing.

• Build reusable React components with modular CSS, manage data on the client with Redux, use react query, and Graph

QL.

• Measure and resolve performance bottlenecks, using tools like Chrome Dev Tools, Lighthouse, Web Pagetest, or custom tooling.

• Refactor or improve existing code while constantly finding ways to improve all of our JavaScript code.

• Work closely with our product, design, and UX teams to create amazing and intuitive experiences that make it effortless to connect different apps together.

• Help put tools, processes, and documentation in place to improve our code quality.

• Review code written by other team members or other teams.

• Ship to hundreds of thousands of users every day while having lots of autonomy in terms of code and feature ownership.

• Work with complex and varied data structures (APIs can be a little eccentric).

• Help out with our Node-based developer platform.

• Share what you know and learn either one-on-one or with lightning talks to the group.

• Give back to the community via open source and blog posts.

• Experiment: this is a startup-like environment so everything can change as we experiment with doing more custom partnership work.

• As a part of Walmart's all-hands philosophy, help customers via support to ensure they have the best experience possible.

• You'll also have the opportunity to specialize in a variety of areas of the codebase, including core product or platform development. Focusing on a specialization will not limit your area for growth at Walmart, as each engineer brings a unique perspective and can contribute differently to all areas. We encourage participation and will frequently have engineers contribute across teams to assist in projects.

Minimum Qualifications

• BS/MS with a minimum of 10 years of experience in software engineering.

• Minimum 8 years of experience in JavaScript.

• Minimum 2 years of experience in Node JS development.

• Minimum 1 year of experience in Graph

QL.

• Experience in writing extensive unit tests.

Preferred Qualifications

• years of experience in software development using modern languages (NodeJS, React, etc.).

• Thorough understanding of React, Node.

JS and its core principles.

• Experience in React Query or nx is a big plus.

• Own code quality and experience in writing extensive unit tests.

• Familiarity with modern front-end build pipelines and tools.

• Proven ability to learn and adapt to new technologies and frameworks quickly.

• Ability to deliver in Agile method (SCRUM).

Excellent written communication and follow-up skills.

#JLjbffr
Position Requirements
10+ Years work experience
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