Senior Reliability Engineer

Job Summary

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

• 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, with demonstrable expertise in reliability engineering and qualification of optoelectronic components.
• Experience defining, planning, and executing reliability programmes.
• Knowledge of failure mechanisms in lasers, photodetectors, modulators, wave guides, resistors, and fibre‑coupled devices.
• Experience with accelerated life testing, reliability modelling, and life‑time prediction.
• Proficiency in statistical analysis using tools such as Relia Soft/Weibull++, JMP, Minitab, or Python.
• Familiarity with 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.

• Competitive salary.
• 25 days annual leave plus public holidays.
• Private medical insurance.
• Pension scheme.
• Health cash plan.
• Ongoing training and development.
• Excellent career progression opportunities.
• Additional employee benefits.

Lumentum is an equal opportunity employer and welcomes applications from all qualified candidates regardless of age, disability, gender, marital status, race, religion or belief, sexual orientation, nationality, or any other protected characteristic. We do not discriminate on the basis of race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment.

Please contact us to request accommodation.