Senior CFD Engineer - Plasma Specialist

PhysicsX Ltd.; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Equity options

10% employer pension contribution

Free office lunches

Enhanced parental leave - 3 months p.

YellowNest nursery scheme

25 days Annual Leave (+ Public Holydas

Private medical insurance

Wellhub Subscription

Eye tests

Personal development

Employee Assistance Programme (EAP)

Bike2Work scheme and Season ticketLoan

Octopus EV salary sacrifice

Job summary

PhysicsX Ltd. in London seeks a Senior CFD Engineer – Plasma Specialist to translate plasma physics into high-fidelity models for semiconductor manufacturing, including etching, deposition, and surface processing.

You will work with Data Scientists, ML Engineers and customers, often on-site, to scope challenges, design modelling strategies, and deliver AI-powered workflows. Hybrid work with three days in Shoreditch.

Qualifications

• Deep expertise in plasma physics applied to semiconductor manufacturing.
• Experience building high-fidelity computational models integrated into AI tools.
• Strong communication skills and ability to work with clients on-site to define problems and present results.

Responsibilities

• Build and own computational plasma models for semiconductor processes (etching, deposition, surface interactions).
• Work directly with semiconductor customers on-site to scope challenges and design modelling strategies.
• Select and apply appropriate simulation tools and fidelity levels; validate outputs with data.
• Collaborate with PhysicsX Data Scientists and ML Engineers to integrate simulations into AI-powered workflows.
• Operate independently on highly specialised problems with minimal oversight.
• Travel globally (3–4 weeks/quarter) to work with customers on-site.

Skills

Python

Plasma physics

Client engagement

Tools

COMSOL

HPEM

VizGlow

CFD-ACE+

Job description

About us

Re-architecting Engineering for the Age of Intelligence

PhysicsX is the physics AI company for industrials. The company’s mission is to accelerate hardware innovation by overhauling what industrial engineering and manufacturing look like today. PhysicsX is building a new simulation software stack to deliver deep physics AI enablement across the entire engineering lifecycle. The company partners with leading organisations in aerospace & defence, automotive, semiconductors, materials, and energy & renewables, supporting them on some of their most critical and complex challenges. PhysicsX is headquartered in the United Kingdom, with offices in London, New York, and Singapore and an expanding presence in the Bay Area.

Who We’re Looking For

As a Senior CFD Engineer – Plasma Specialist, you are a problem solver passionate about creating practical solutions that help customers make better engineering decisions. You bring deep expertise in plasma physics and excel at working directly with customers, often on-site to build high-fidelity computational models integrated into AI tools that are both useful and used.

We are seeking a skilled Senior CFD Engineer with expertise in plasma physics applied to semiconductor manufacturing, including plasma etching, deposition, and surface processing. We are particularly interested in candidates with a strong background in computational plasma modelling, covering areas such as plasma chemistry, sheath dynamics, ion energy distribution, and plasma-surface interactions. Awareness of machine learning in physics-based simulation workflows is a plus.

You are independent, adaptable, and experienced, able to engage rapidly with semiconductor customer teams and tackle highly niche engineering challenges without needing to learn the industry from scratch. Strong communication skills are critical, as you’ll work closely with clients to define challenges, present results clearly, and co-develop solutions.

If you have Plasma experience in other industries, we'd still love to hear from you!

This Role

In this role, you will work closely with our Data Scientists, Machine Learning Engineers, and customers to understand and define the plasma-related engineering challenges we are solving.

• Building and owning computational plasma models for semiconductor manufacturing processes, including plasma etching, CVD/ALD deposition, and ion-driven surface interactions.


• Working directly with semiconductor customers - often on-site - to scope engineering challenges, design modelling strategies, and present results in a way that drives real process decisions.


• Selecting and applying the right simulation tools and fidelity level for each problem (e.g. COMSOL, HPEM, VizGlow, CFD-ACE+), and validating outputs against experimental or industrial process data.


• Collaborating closely with PhysicsX Data Scientists and ML Engineers to integrate your simulation work into AI-powered workflows.


• Operating independently on open-ended, highly specialised problems - scoping, executing, and delivering with minimal oversight.


• Industry experience ideally within or directly supporting the semiconductor manufacturing industry.


• Proficiency in Python (or similar) for workflow automation, data handling, and integration with simulation tools.


• Combining project leadership with a strong commitment to mentoring junior colleagues, contributing to a culture of collaboration, growth, and shared success.


• Traveling globally (North America, Europe, Asia, Oceania) for an average of 3-4 weeks per quarter to work side-by-side with customers in building solutions on-site.

As the role evolves, there are opportunities for growth as an individual contributor or technical lead, especially if you want to own increasingly complex semiconductor plasma projects and help guide the direction of future solutions. We operate on a hybrid model, with around three days per week based in our Shoreditch office.

Our delivery teams drive innovation to turn AI models into practical solutions - read our blog to learn more about how you'll contribute to this exciting journey!

What we offer

Build what actually matters

Help shape an AI-native engineering company at a formative stage, tackling problems that genuinely matter for industry and society. This is work with real-world impact - and something you can be proud to stand behind.

Learn alongside exceptional people

Work with a high-caliber, collaborative team of engineers, scientists, and operators who care deeply about doing great work, and about helping each other get better. We come from diverse backgrounds, but we share a commitment to operating at the highest level and addressing some of the most complex challenges out there. If you’re ambitious, thoughtful, and driven by impact, you’ll feel at home.

Influence over hierarchy

We operate with a flat structure: good ideas win- wherever they come from. Questioning assumptions and challenging the status quo isn’t just welcomed, it’s expected.

Sustainable pace, long-term ambition

Building meaningful technology is a marathon, not a sprint. We believe in balancing focused, ambitious work with a life beyond it. Our hybrid model blends time together in our Shoreditch office with work-from-home days, giving you the flexibility to work sustainably while staying connected in person.

And it doesn’t stop there …

• Equity options - share meaningfully in the company you’re helping to build.


• 10% employer pension contribution - because investing in future matters.


• Free office lunches - to keep you energised and focused.


• Enhanced parental leave - 3 months full pay paternity and 6 months full pay maternity leave, to provide extra flexibility during the moments that matter most.


• YellowNest nursery scheme - to help working parents manage childcare costs.


• 25 days of Annual Leave (+ Public Holidays) - because taking time to rest matters.


• Private medical insurance - 100% employee cover, giving you complete peace of mind.


• Wellhub Subscription - gain access to thousands of gyms, classes and wellness apps, supporting both physical and mental wellbeing.


• Eye tests - because good work depends on good health.


• Personal development - dedicated support for learning, development, and leveling up over time.


• Employee Assistance Programme (EAP) - confidential wellbeing support, available whenever you need it.


• Bike2Work scheme and Season ticket loan - to make getting to work easier and greener.


• Octopus EV salary sacrifice - for a simpler, more sustainable way to drive electric.

Watch this space, we’re continuing to build this as we grow…

We value diversity and are committed to equal employment opportunity regardless of sex, race, religion, ethnicity, nationality, disability, age, sexual orientation or gender identity. We strongly encourage individuals from groups traditionally underrepresented in tech to apply. To help make a change, we sponsor bright women from disadvantaged backgrounds through their university degrees in science and mathematics.

We collect diversity and inclusion data solely for the purpose of monitoring the effectiveness of our equal opportunities policies and ensuring compliance with employment and equality legislation. This information is confidential, used only in aggregate form, and will not influence the outcome of your application.

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