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Senior Software Development Engineer in Test (SDET)

At Northwestern Mutual, we are strong, innovative and growing. We invest in our people. We care and make a positive difference.


At Northwestern Mutual, we are strong, innovative, and growing. We invest in our people. We care and make a positive difference.

What's the role?
As a technical, hands-on Software Development Engineer in Test (SDET) your job is to participate in the manual & automation testing of our web and mobile based application. You will be under the guidance of a Principal SDET of a team with an already-established, mature testing process. Your role will be that of a "full-stack" QA Engineer - someone who has a strong appreciation and skill in software engineering with the capability of writing manual & automated and performance tests (time and training is allotted after hiring to learn our tech stack and frameworks).
Our Tech Stack: Node.js,, Mocha, Chai, Cucumber, GitLab, Sauce Labs, Applitools, K6


  • Contribute to an agile team by driving user story analysis and feature grooming, designing, and developing thorough test scripts 
  • Automated manual test data creation process by building custom API Routes
  • Proven experience on writing complex API tests which interface with upstream services or databases
  • Design and implement manual test suites by writing test plan/test cases / etc. 
  • Attend and contribute to sprint planning and take ownership of testing responsibility to ensure successful product releases 
  • Design, implement and maintain cross-platform test automation scripts
  • Maintain the functional test portion of the Continuous Integration pipeline
  • Develop and maintain BDD test scenarios and regression plans
  • Participate in full test development life cycle including requirements analysis and design
  • Work with developers to provide additional research and debugging of issues when more information is needed to resolve problems
  • Demonstrate technical leadership
  • Establish, aggregate, and share team standards and best practices
  • Able to utilize working relationships across divisions to implement holistic solutions
  • Responsible for writing testable code, constructing valuable unit tests, and implementing all of the organization's code quality standards and practices within the code.
  • Handles bug fixes, develop features, and write highly testable code with appropriate tests in place
  • Help define and maintain project backlog
  • Mentor, guide and assign work to junior engineers
  • Utilize established monitoring and automation processes
  • Creates report / metrics, defining key findings for stakeholders.

Bring Your Best! What this role needs:

  • 6+ years of QA Engineering experience
  • 4+ years of professional experience as a QA Automation Engineer working in an agile environment
  • 4+ years of mobile Testing Experience (iOS/Android)
  • 2+ years of RESTful services automation experience
  • Strong analytic and debugging skills
  • Thorough understanding of QA concepts, STLC, SDLC, Continuous Integration, and Continuous Deployment
  • Demonstrated experience in automating tests with using JS, Java, Python, or other languages
  • Solid understanding of different element locator strategies and the ability to write custom XPath, CSS Path
  • Experience with Git, Jira
  • Ability to work independently with minimal supervision
  • Strong written and verbal communication skills
  • Demonstrated critical thinking, ownership mindset and continuous learning.
  • Experience using continuous integration and deployment concepts
  • At least 3-5 years of experience with specific technical requirements/platforms (i.e., Java, JavaScript, .NET, Python).
  • Proven expertise in public cloud and associated technologies (AWS, Azure, Containerization)"
  • Proven results delivering within an application engineering team.
  • Proven experience mentoring team members (whether other developers or SDETs).
  • Advanced skillset in one or more assigned, relevant technologies
  • Capable of communicating between product, engineering, and stakeholders
  • Manages own time to meet objectives
  • Drives peer reviews on code and architectural application design"
  • Extensive background in shift left testing practices with a strong emphasis on writing highly testable code and unit testing.
  • Test Driven Development (TDD) experience.
  • Previous experience with test automation, performance management and test design.
  • Solid understanding of non-functional testing concepts.
  • Exhibits a solid understanding of NM's business model, how the HO and Field work together, and how the work supports the enterprise.
  • Deep understanding of business area's products, process, and interdependencies. 
  • Solid understanding of the systems and processes that support the applicable business domain. 
  • Significant practical experience developing software in coding language(s) used in support.
  • Significant experience using language-specific testing frameworks relevant to their work. 
  • Experience with REST / SOAP services and clients.
  • Working knowledge of the Spring Framework and Junit
  • Experience writing and debugging multithreaded Java applications.
  • Experience with GitHub or Gitlab for source code management


Grow your career with a best-in-class company that puts our client’s interests at the center of all we do. Get started now!

W e are an equal opportunity/affirmative action employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or status as a protected veteran, or any other characteristic protected by law.

If you work or would be working in Colorado or outside of a Corporate location, please click here for information pertaining to compensation and benefits.


We’re excited about the potential people bring to Northwestern Mutual. You can grow your career here while enjoying first-class perks, benefits, and commitment to diversity and inclusion.