Senior Software Test Engineer

About Lumilens

At Lumilens we are building the critical photonics infrastructure that powers tomorrow's AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is unlocking a new era of computing faster, cooler, and massively more efficient.

We're a well-funded startup backed by Mayfield and led by veterans who've built and scaled some of the most transformative technologies in the industry. At Lumilens, we're developing high-speed photonics products purpose-built to power the future of AI infrastructure and high-performance computing.

This isn't incremental innovation, it's a ground-floor opportunity to rethink the optical layer from the silicon up. You'll work alongside a team of world class engineers solving some of the hardest challenges in scaling optical systems. Every line of code, every design decision, every breakthrough you help deliver will shape the infrastructure of tomorrow.

If you're looking for mission, momentum, and the chance to make an outsized impact, jump on the rocket ship. We're just getting started.

About the Role

As an Optical Product Test Engineer specializing in software automation, you will work on test automation and networking protocols. You will help validate complex systems at Layer 1 and Layer 2 using tools like Ixia and build Python based frameworks.

Key Responsibilities

• Develop, maintain, and execute automated test cases in Python.
• Perform functional, regression, and performance testing on Layer 1 and Layer network systems.
• Validate hardware and software integration with optical interfaces and network switches.
• Configure and use traffic generators (e.g., IXIA) to simulate network environments and evaluate performance.
• Collaborate with developers and hardware engineers to identify, reproduce, and resolve defects.
• Document test cases, results, and defects in test management tools.
• Maintain code and test assets in version control systems (GitHub or Bitbucket). Continuously improve test frameworks and methodologies.
• Collaborate with design engineer and manufacturing teams to define and develop the test software for the high volume manufacturing of the high-end optical component manufacturing
• Closely collaborate with engineering teams to improve manufacturing yield, efficiency and cost
• Owner of Manufacturing test scripts creating, maintaining, changing control.
• Manage manufacturing software change control processes, system, through the execution.
• Collaborate with software engineer, IT and database to define the better solutions of manufacturing test data in reliability, reasonable cost, high efficiency and scalability.

Required Skills & Qualifications

• Bachelor's or Master's degree in Computer Science, Electronics, Telecommunications, or related field.
• 4–8 years of hands-on experience in software testing and test automation of products used in optical networking.
• Strong proficiency in Python for test automation.
• Good understanding of Layer 1 and Layer 2 networking protocols.
• Experience with optical testing, network switches, and traffic generators like IXIA.
• Ability to debug issues in complex networking environments.
• Experience with Jenkins or ArgoCD other CI/CD tools.
• Familiarity with Shell scripting for automation and environment setup.
• Exposure to C# for UI validation or tool development is a plus.

Education & Background:

• Bachelor's degree in Electrical Engineering, Computer Engineering, Physics, or related field.
• Experience in automated test system development for electronics and optics manufacturing.
• Experienced in optical products testing equipment and coding.
• Knowledge and experience in the optical transceiver manufacturing will be plus.

Technical Skills:

• C# .NET (Framework or Core).
• Familiar with OOP concepts such as class, interface, inheritance and polymorphism.
• Familiar with Windows Form or WPF.
• Hardware communication protocols: NI-VISA, SCPI, RS-232, TCP/IP.
• Experienced in test instruments such as optical oscilloscopes, optical power meters, optical switches and network switches.
• Database integration: SQL, NoSQL for test data logging and analysis.
• Version control tools: Github, Bitbucket or SVN.
• Experience with optical transceivers, especially silicon photonics (SiPh) is a plus
• Good command in English communication both verbal and written. And other communication skills, including in-person and virtual presentation skills.

What we offer

• Competitive salary commensurate with experience.
• Comprehensive benefits package including health insurance.
• Professional development opportunities and certification support.
• Access to cutting-edge technology and cloud platforms.
• Collaborative work environment with cross-functional teams.
• Lumilens is an equal opportunity employer. All qualified applicants will receive consideration without regard to race, color, religion, gender, identity, orientation, veteran status, disability, or any other legally protected status.