Senior, Software Engineer - SDET

Walmart•Denver, CO

1d•Onsite

About The Position

We are looking for a driven Software Development Engineer in Test (SDET) to support a backend-heavy, microservices-based architecture built primarily in TypeScript. This role requires someone who can operate independently and take ownership of automation across both service-level and cross-service testing. You’ll ensure each service is well-tested in isolation while also building robust integration and end-to-end test strategies that validate how services interact across the system. This is a high-impact role focused on improving reliability, accelerating development velocity, and embedding quality into the engineering culture. The role starts with a strong focus on building a scalable automation foundation across our services. As that foundation matures and becomes embedded within the team’s workflows, ownership of automation will increasingly shift to the broader engineering team. Over time, this role is expected to evolve into a more traditional Software Engineer position, with opportunities to build and ship backend features, contribute directly to service development, and help maintain and extend the automation ecosystem as a shared team responsibility. We’re looking for someone who is excited to lead the automation effort early and grow into a broader engineering role as the team scales.

Requirements

4+ years of experience in an automation-focused role (SDET, QA Automation Engineer, or similar)
Strong experience testing backend systems and microservices architectures
Proficiency in TypeScript/JavaScript and experience with Node.js services
Strong proficiency in TypeScript and/or C#; experience in Python or Go is a plus
Working knowledge in Postman API.
Hands-on experience with automation tools/frameworks (e.g., Jest, Mocha, Playwright, Supertest, or similar)
Experience with API, integration, and contract testing (e.g., Pact or similar)
Familiarity with CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI, etc.)
Solid understanding of distributed systems (service dependencies, retries, eventual consistency)
Ability to operate independently and take ownership of ambiguous problems
Bachelor's degree in computer science, computer engineering, computer information systems, software engineering, or related area and 3 years’ experience in software engineering or related area.
OR 5 years’ experience in software engineering or related area.

Nice To Haves

experience with event-driven systems (Kafka, RabbitMQ)
Docker/Kubernetes
Test containers
observability tools
performance testing
Master’s degree in Computer Science, Computer Engineering, Computer Information Systems, Software Engineering, or related area and 1 year's experience in software engineering or related area.
background in creating inclusive digital experiences
knowledge in implementing Web Content Accessibility Guidelines (WCAG) 2.2 AA standards
assistive technologies
integrating digital accessibility seamlessly
knowledge of accessibility best practices
following Walmart’s accessibility standards and guidelines for supporting an inclusive culture.

Responsibilities

Design and implement automated testing strategies for a distributed microservices architecture
Build and maintain service-level (unit + integration) automated tests for TypeScript/Node.js services
Develop cross-service integration tests to validate APIs, contracts, and workflows
Create and evolve reusable automation frameworks for backend and API testing
Integrate tests into CI/CD pipelines to provide fast, reliable feedback
Collaborate with engineers to embed testing into the development lifecycle
Identify gaps in coverage and drive improvements in system reliability
Troubleshoot flaky tests, distributed system issues, and test environment challenges
Build and ship backend features
Contribute directly to service development
Help maintain and extend the automation ecosystem as a shared team responsibility

Benefits

medical
vision
dental coverage
401(k)
stock purchase
company-paid life insurance
PTO (including sick leave)
parental leave
family care leave
bereavement
jury duty
voting
short-term and long-term disability
company discounts
Military Leave Pay
adoption and surrogacy expense reimbursement
PTO and/or PPTO that can be used for vacation, sick leave, holidays, or other purposes
Live Better U is a Walmart-paid education benefit program for full-time and part-time associates in Walmart and Sam's Club facilities. Programs range from high school completion to bachelor's degrees, including English Language Learning and short-form certificates. Tuition, books, and fees are completely paid for by Walmart.