Osi Systems

Software Development Engineer in Test (SDET)

Osi Systems$90K — $120K *
Technical Services
8 - 10 years of experience
Job Overview by Ladders

Qualifications

  • Degree in Computer Science or Software Engineering, or equivalent experience.
  • 8+ years in software testing and automation, 5+ years in Python development.
  • Strong understanding of testing methodologies, Agile practices, and CI/CD pipelines.
  • Experience with distributed or embedded systems and exceptional troubleshooting skills.
  • Proficient in SOLID principles, design patterns, and version control (Git/SVN).
  • Demonstrated mentorship and leadership in technical reviews and team guidance.
  • Excellent communication skills for diverse stakeholder engagement.

Responsibilities

  • Design and maintain scalable Python-based automation frameworks and test libraries.
  • Enforce software engineering best practices for reliable testing solutions.
  • Develop comprehensive automated test strategies for distributed systems.
  • Troubleshoot test failures and improve test quality and execution efficiency.
  • Integrate automated testing into CI/CD pipelines for efficient regression testing.
  • Create and review test documentation to ensure compliance and quality validation.
  • Collaborate with cross-functional teams to enhance testability and implement shift-left testing practices.

Benefits

  • Encouragement for ongoing professional development and continual learning.
  • Opportunities to mentor junior developers and foster team collaboration.
  • Involvement in critical projects within the maritime industry enhancing safety and reliability.
  • Exposure to cutting-edge testing tools and techniques, including AI-driven methods.
Full Job Description
The Software Development Engineer in Test (SDET), will apply software engineering best practices to design, review, and implement automated tests and the frameworks they run on to validate complex distributed systems. Their work ensures reliability, safety, and compliance in high-stakes maritime environments.

What you will do:
• Design, develop, and maintain scalable Python-based test automation frameworks and reusable test libraries for API, UI, system, functional, regression, and performance testing.
• Enforce software engineering best practices, including SOLID principles, design patterns, clean code standards, and TDD/BDD methodologies, to ensure maintainable and reliable test solutions.
• Develop automated test strategies for distributed and embedded systems, including mocking, stubbing, network performance validation, and basic security testing.
• Troubleshoot complex test failures, refactor legacy automation, and drive continuous improvements in test quality, reliability, and execution efficiency.
• Integrate and optimize automated testing within CI/CD pipelines to enable scalable, parallelized, and automated regression testing.
• Create and review test plans, procedures, reports, and quality documentation to support compliance, traceability, and product validation requirements.
• Collaborate with Software Development, DevOps, Systems Engineering, and QA teams to improve testability and promote shift-left testing practices.
• Lead code reviews, mentor junior SDETs, and drive adoption of testing best practices, tools, and emerging technologies.
• Ensure test activities align with regulatory, defense, and naval industry quality standards while performing hands-on and exploratory testing as required.
• Chair meetings and foster collaboration with offshore team.
• Guide process improvements and explore new testing tools/techniques (e.g. AI-driven testing).

What you will bring:
• Degree or diploma in Computer Science, Software Engineering, or a related field, or an equivalent combination of education and experience.
• 8+ years of software testing and test automation experience, including 5+ years of Python development.
• Strong knowledge of software testing methodologies, automation frameworks, software development lifecycles, Agile practices (Scrum/Kanban), and CI/CD pipelines.
• Experience testing distributed, networked, real-time, or embedded systems, with strong troubleshooting and problem-solving skills.
• Proficiency in software design principles, including SOLID, design patterns, version control systems (Git/SVN), and test and issue management tools (e.g., Jira, Zephyr Scale).
• Demonstrated leadership experience mentoring team members, conducting technical reviews, and making sound technical decisions.
• Excellent written and verbal communication skills, with the ability to convey technical concepts to both technical and non-technical stakeholders.
• Familiarity with AI-assisted development and testing tools is an asset.
• Experience in defense, naval, safety-critical, or regulated software environments is preferred.

If you need accommodations during the hiring process, please contact Talent Acquisition.

About Osi Systems

OSI Systems is a vertically integrated designer and manufacturer of specialized electronic systems and components for critical applications in the homeland security, healthcare, defense and aerospace industries. The Company combines more than 40 years of electronics engineering and manufacturing experience with offices and production facilities in more than a dozen countries to implement a strategy of expansion into selective end product markets. Its products and services include security screening solutions, turnkey security screening systems, medical monitoring and anesthesia systems, and optoelectronic devices and value-added subsystems. OSI Systems' customers include federal and state agencies in the United States, international airports, healthcare providers and OEMs around the world.
Learn more about Osi Systems
Size
6,778 employees
Market Cap
$1.3 billion
Industry
Net Income
$62.9 million
Founded
1987
5 Year Trend
+4.2%
Revenue
$1.1 billion
NASDAQ

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