Senior Reliability Engineer

Lumentum; Towcester; On-site; GBP 60,000 - 85,000; Full time

Benefits offered by this job

Private medical insurance

Pension scheme

25 days annual leave

Health cash plan

Job summary

Lumentum is seeking an experienced Reliability Engineer to join its semiconductor and optoelectronics team in the UK. The role focuses on reliability assessment, qualification, and failure analysis of advanced optoelectronic devices, including III-V and Silicon Photonics technologies.

You will collaborate with design, process, product, test, and quality teams to shape qualification strategies. The successful candidate will lead reliability analysis, develop models, and support customer-facing

Qualifications

• Minimum 5 years in semiconductor/optoelectronic reliability.
• Experience defining and executing reliability qualification programmes.
• Experience withDfR, FMEA and FTA methodologies.

Responsibilities

• Define and execute reliability qualification programmes for optoelectronic components.
• Evaluate ageing behaviour and identify reliability risks.
• Develop degradation models and perform lifetime predictions.
• Conduct accelerated life testing and reliability assessments.
• Lead root cause investigations of field returns.
• Prepare technical reports and present findings to stakeholders.
• Support customer discussions on product reliability and qualification.

Skills

Reliability engineering

Qualification planning

Failure analysis

Life prediction modelling

Statistical analysis

DfR/FMEA/FTA

Python

ReliaSoft/Weibull++

JMP/Minitab

Data analysis

Education

Master’s degree in Applied Physics/Electrical Engineering/Materials Science

PhD in related discipline (desirable)

Tools

ReliaSoft/Weibull++

JMP

Minitab

Python

COMSOL/Ansys

Job description

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!

About Lumentum

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.

We operate across two business segments:

• 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.

The Opportunity

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.

Key Responsibilities

• 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.

Essential Qualifications & Experience

Education

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

Experience

A minimum of 5 years’ experience within semiconductor or optoelectronic industries, with demonstrable expertise in:

• Reliability engineering and qualification of optoelectronic components.
• Reliability programme definition, planning, and execution.
• Failure mechanisms in lasers, photodetectors, modulators, waveguides, resistors, and fibre‑coupled devices.
• Accelerated life testing, reliability modelling, and lifetime prediction.
• Statistical analysis using tools such as ReliaSoft/Weibull++, JMP, Minitab, or Python.
• Design for Reliability (DfR), FMEA, and FTA methodologies.
• Technical report writing and presentation of reliability data and conclusions.

Desirable Experience

• 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.

Broader Semiconductor Experience Welcome

We welcome applicants from a wide range of semiconductor backgrounds, including:

• 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.

What We’re Looking For

• Strong analytical and problem‑solving skills.
• Excellent communication and interpersonal abilities.
• Effective project management and organisational skills.
• Self‑motivated and capable of working in a fast‑paced environment.
• Ability to adapt to changing priorities and business needs.
• Willingness to travel internationally to support customers and business activities.

Reward & Benefits

We offer a competitive package including:

• 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

Equal Opportunities

Lumentum is committed to creating an inclusive workplace and is proud to be an equal opportunities employer. We welcome 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 are an equal opportunity employer and value diversity at our company.

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.