Senior Software Test Engineer

Bring more to life.


Are you ready to accelerate your potential and make a real difference within life sciences, diagnostics and biotechnology?


At Leica Biosystems, one of Danaher's 15+ operating companies, our work saves lives-and we're all united by a shared commitment to innovate for tangible impact.


You'll thrive in a culture of belonging where you and your unique viewpoint matter. And by harnessing Danaher's system of continuous improvement, you help turn ideas into impact - innovating at the speed of life.


At Leica Biosystems, we're not just shaping the future of cancer diagnostics - we're transforming lives. Our mission of "Advancing Cancer Diagnostics, Improving Lives" is the driving force behind everything we do. As a global leader with the most comprehensive portfolio spanning from biopsy to diagnosis, we empower clinicians with innovative, reliable solutions so they can give patients timely, accurate answers when they need them most. When you join Leica Biosystems, you're not just taking a job; you're becoming part of a passionate team that knows every moment matters when it comes to cancer. You'll help develop diagnostic solutions that turn anxiety into answers, and aid the acceleration of next-generation, life-changing therapies. Surrounded by a diverse and collaborative global community, you'll be inspired each day to stretch, grow, and make an impact.


Learn about the Danaher Business System which makes everything possible.


The Senior Software Test Engineer is responsible for ensuring the quality, reliability, and performance of AI-driven digital pathology solutions. You will collaborate with cross-functional teams including Deep Learning scientists, software developers, and system engineers to design and implement robust verification strategies. This role emphasizes automation, system integration, and performance testing in a regulated environment. You will act as a resource for less experienced colleagues and may lead small projects with manageable risks and resource requirements.

This position reports to the Manager, Software Development, and will be based onsite, in Vista, CA.

In this role, you will have the opportunity to:

• Develop, execute, and automate testing strategies for AI-based systems, including test plans, manual and automated test cases, performance testing, and integration of automated tests into CI/CD pipelines to ensure system quality, scalability, and regulatory compliance.
• Collaborate with engineering and product teams throughout the development lifecycle to define requirements, establish acceptance criteria, assess quality risks, and improve system testability through design reviews and continuous feedback.
• Manage and validate AI/ML datasets and system performance, including curating large datasets used for training, testing, and validation, while identifying and resolving complex issues across software, hardware, and AI system components.
• Drive quality excellence and technical leadership by enhancing QA processes, tools, and best practices, and mentoring software AI test engineers to support team growth and organizational success.

The essential requirements of the job include:

• Bachelor's degree in Computer Science, Computer Engineering, or a related field, or equivalent industry experience.
• 6+ years of experience in software testing or software development, preferably within a regulated industry.
• Strong programming and scripting skills in languages such as Python, PowerShell, JavaScript, or R, with proficiency in Linux and Windows command-line environments.
• Experience with test automation and DevOps practices, including frameworks such as PyTest, Selenium, Cypress, or Postman, and CI/CD tools and methodologies.

It would be a plus if you also possess previous experience:

• Experience with cloud platforms, containerization, orchestration technologies, and enterprise IT infrastructure (AWS, Azure, Docker, Kubernetes).
• Knowledge of medical device development, regulatory compliance, design controls, and cybersecurity standards.
• Experience with AI/ML technologies, model validation, and digital pathology or healthcare diagnostic workflows.

Leica Biosystems, a Danaher operating company, offers a broad array of comprehensive, competitive benefit programs that add value to our lives. Whether it's a health care program or paid time off, our programs contribute to life beyond the job. Check out our benefits at Danaher Benefits Info.


The annual salary range for this role is $130k - $140k This is the range that we in good faith believe is the range of possible compensation for this role at the time of this posting. We may ultimately pay more or less than the posted range. This range may be modified in the future.

This job is also eligible for bonus/incentive pay. We offer a comprehensive package of benefits including paid time off, medical/dental/vision insurance and 401(k) to eligible employees.

Note: No amount of pay is considered to be wages or compensation until such amount is earned, vested, and determinable. The amount and availability of any bonus, commission, benefits, or any other form of compensation and benefits that are allocable to a particular employee remains in the Company's sole discretion unless and until paid and may be modified at the Company's sole discretion, consistent with the law.

Join our winning team today. Together, we'll accelerate the real-life impact of tomorrow's science and technology. We partner with customers across the globe to help them solve their most complex challenges, architecting solutions that bring the power of science to life.


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