Sr Software Test Engineer

What if the work you did every day could impact the lives of people you know? Or all of humanity?

At Illumina, we are expanding access to genomic technology to realize health equity for billions of people around the world. Our efforts enable life-changing discoveries that are transforming human health through the early detection and diagnosis of diseases and new treatment options for patients.

Working at Illumina means being part of something bigger than yourself. Every person, in every role, has the opportunity to make a difference. Surrounded by extraordinary people, inspiring leaders, and world changing projects, you will do more and become more than you ever thought possible.

This position will require the candidate to lead and execute advanced software testing for web applications and instrument systems, with a focus on C# and TypeScript–based solutions. The Senior Engineer will be responsible for designing and implementing automated and manual test strategies, building robust verification frameworks, and ensuring seamless integration into CI/CD pipelines.

The successful candidate will demonstrate deep technical expertise in modern software testing practices, a strong sense of ownership, and the ability to influence quality across teams.

Key Responsibilities:

• Develop and maintain automated test frameworks using C# and TypeScript, covering both API and UI testing.
• Partner with software developers and domain experts to define test coverage, optimize frameworks, and drive scalable automation solutions.
• Own quality metrics for assigned projects, proactively identifying risks and implementing improvements.
• Mentor and guide junior engineers in testing methodologies, automation practices, and domain knowledge.
• Integrate automated test suites into CI/CD platforms such as GitHub Actions, TeamCity, or Jenkins to ensure continuous quality.
• Work collaboratively and effectively in a fast-paced environment, driving alignment across stakeholders.

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Requirements:

• Typically requires a minimum of 5 years of related experience with a Bachelor’s degree; or 3 years and a Master’s degree; or a PhD without experience; or equivalent work experience
• 5+ years’ in-depth experience working in Software Quality Engineering/Assurance and/or other areas of the SDLC to test web and/or instrument applications, both front and back end
• 5+ years’ software development experience in at least one programming or scripting language, such as C#, Java, JavaScript, Typescript
• Solid understanding of the test pyramid and the ability to design effective test suites across unit, component, integration, and end-to-end (E2E) testing.
• Strong hands-on experience with API and UI test automation frameworks (e.g., Playwright, Cypress, Selenium, WebdriverIO, REST/GraphQL testing).
• Familiarity with CI/CD pipelines and tools (GitHub Actions, TeamCity, Jenkins).
• Demonstrated experience leading test strategy and mentoring other engineers.
• Strong analytical and problem-solving skills, with attention to detail.

Desired:

• Experience working with the following automation frameworks/technologies: Mocha, Nunit, WebdriverIO
• Experience in performance testing, usability testing, and security testing
• Be curious, detail oriented, and analytical, with a proven ability to learn quickly
• Be customer-focused, team-oriented, and motivated, taking ownership of assigned tasks
• Have proven ability to self-manage, as well as manage interdisciplinary relationships
• Have proven verbal and written communication skills

#LI-HYBRID

The estimated base salary range for the Sr Software Test Engineer role based in the United States of America is: $126,800 - $190,200. Should the level or location of the role change during the hiring process, the applicable base pay range may be updated accordingly. Compensation decisions are dependent on several factors including, but not limited to, an individual’s qualifications, location where the role is to be performed, internal equity, and alignment with market data. Additionally, all employees are eligible for one of our variable cash programs (bonus or commission) and eligible roles may receive equity as part of the compensation package. We offer a wide range of benefits as innovative as our work, including access to genomics sequencing, family planning, health/dental/vision, retirement benefits, and paid time off.

We are a company deeply rooted in belonging, promoting an inclusive environment where employees feel valued and empowered to contribute to our mission. Built on a strong foundation, Illumina has always prioritized openness, collaboration, and seeking alternative perspectives to propel innovation in genomics. We are proud to confirm a zero-net gap in pay, regardless of gender, ethnicity, or race. We also have several Employee Resource Groups (ERG) that deliver career development experiences, increase cultural awareness, and offer opportunities to engage in social responsibility. We are proud to be an equal opportunity employer committed to providing employment opportunity regardless of sex, race, creed, color, gender, religion, marital status, domestic partner status, age, national origin or ancestry, physical or mental disability, medical condition, sexual orientation, pregnancy, military or veteran status, citizenship status, and genetic information. Illumina conducts background checks on applicants for whom a conditional offer of employment has been made. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable local, state, and federal laws. Background check results may potentially result in the withdrawal of a conditional offer of employment. The background check process and any decisions made as a result shall be made in accordance with all applicable local, state, and federal laws. Illumina prohibits the use of generative artificial intelligence (AI) in the application and interview process. If you require accommodation to complete the application or interview process, please contact [email protected]. To learn more, visit: https://www.dol.gov/ofccp/regs/compliance/posters/pdf/eeopost.pdf. The position will be posted until a final candidate is selected or the requisition has a sufficient number of qualified applicants. This role is not eligible for visa sponsorship.