Senior Reliability Engineer

It’s fun to work in a company where people truly BELIEVE in what they’re doing! We’re committed to bringing passion and customer focus to the business. If you like wild growth and working with happy, enthusiastic over-achievers, you’ll enjoy your career with us!

Lumentum is a global leader in the design and manufacture of innovative optical and photonic products that enable next-generation optical networking and laser applications. Our technologies power cloud data centres, AI/ML infrastructure, telecommunications networks, and advanced industrial applications worldwide.

• Cloud & Networking – Optical and photonic components, modules, and subsystems supporting cloud infrastructure, data centre interconnects, and communication networks.
• Industrial Tech – Advanced laser technologies including solid-state, fibre, diode, ultrafast, and gas lasers serving a wide range of industrial markets.

We are seeking an experienced Reliability Engineer to join our semiconductor and optoelectronics team. This role will focus on the reliability assessment, qualification, and failure analysis of advanced optoelectronic devices, including III-V and Silicon Photonics (SiPho) technologies.

The successful candidate will work closely with design, process, product, test, and quality engineering teams to develop qualification strategies, investigate reliability risks, and support customer-facing reliability activities.

• Define, plan, and execute reliability qualification programmes for optoelectronic components.
• Evaluate semiconductor and optical component ageing behaviour and identify reliability risks.
• Develop failure mode-specific degradation models and perform life prediction analysis.
• Conduct accelerated life testing and reliability assessments.
• Lead root cause investigations and reliability analysis of field returns.
• Apply Design for Reliability (DfR), Failure Modes and Effects Analysis (FMEA), and Fault Tree Analysis (FTA) methodologies.
• Analyse complex reliability datasets using statistical and modelling tools.
• Prepare technical reports and present findings to internal and external stakeholders.
• Support customer discussions relating to product reliability, qualification, and physics-of-failure.

• Master’s degree in Applied Physics, Electrical Engineering, Materials Science, or a related discipline.
• Strong academic background in a relevant engineering or scientific field.

• Minimum of 5 years’ experience within semiconductor or optoelectronic industries.
• Demonstrable expertise in reliability engineering and qualification of optoelectronic components.
• Reliability programme definition, planning, and execution.
• Failure mechanisms in lasers, photodetectors, modulators, wave guides, resistors, and fibre-coupled devices.
• Accelerated life testing, reliability modelling, and lifetime prediction.
• Statistical analysis using tools such as Relia Soft/Weibull++, JMP, Minitab, or Python.
• Design for Reliability (DfR), FMEA, and FTA methodologies.
• Technical report writing and presentation of reliability data and conclusions.

• PhD in Applied Physics, Electrical Engineering, Materials Science, or a related discipline.
• Semiconductor fabrication and process engineering experience.
• Test instrumentation development and die-level characterisation.
• Programming experience in Python, C, or C#.
• Failure analysis techniques including Electroluminescence, FIB, SEM/TEM, and EDX.
• Device modelling and Design for Reliability using COMSOL or Ansys.
• Machine learning applications for large reliability datasets.
• Customer-facing reliability and qualification support.
• Mentoring or technical leadership experience.

• Compound Semiconductors (InP, GaAs, SiC, GaN, Ga₂O₃)
• Silicon semiconductor technologies.

Candidates with strong experience in testing, test development, characterisation, failure analysis, or data analytics are encouraged to apply.

• Strong analytical and problem-solving skills.
• Excellent communication and interpersonal abilities.
• Effective project management and…