Job Senior Apps Engineer UK

Would you like to be instrumental in enabling the next generation of semi-conductors?

As a Senior Applications Engineer, you’re owning the bridge between cutting-edge technology and real-world customer needs. You’re working across the full product lifecycle, shaping how our solutions perform in the field and how they evolve. You’re also getting hands-on with customers globally, making a direct impact where it matters most.
If this is you, read on….

Reward and Benefits

£65,000 to £75,000 (depending on experience)

25 days annual leave, death in service and private healthcare, personal pension contributions of 4% via salary sacrifice, and a generous EMI share scheme

Based in Abingdon, Oxford, UK, we’re a high-calibre team of 100+ people growing fast. Backed by global financial and industry investors including Applied Ventures, we’re building something genuinely impactful.

About the role:

You’re playing a key role in making sure our products meet (and exceed) customer expectations. You’re acting as the voice of the customer internally, feeding insights into Engineering and R&D, while leading application projects that improve performance and user experience.

This is a highly hands-on role with ~50% international travel, working directly with customers and end-users on-site

A typical day for a Senior Applications Engineer could look like this:

• Leading customer demos, characterisation work, and technical evaluations


• Presenting results clearly to both customers and internal teams


• Acting as the go-to contact for application-related support queries


• Troubleshooting complex, multi-disciplinary issues across mechanics, optics, electronics, software, and algorithms


• Collaborating with Engineering and R&D to feed back customer insights


• Driving application projects to improve product performance and user experience


• Supporting and maintaining application lab facilities and equipment

Who we are looking for:

To succeed as a Senior Applications Engineer, we do need you to have experience of:

• Working in the semiconductor industry with a strong hands-on focus


• Leading or supporting characterisation and demonstration activities for metrology equipment


• Supporting customers in a technical or applications-focused role


• Diagnosing complex technical issues across multiple disciplines


• Communicating technical concepts clearly, both written and verbal

Nice to have:

• Experience with Atomic Force Microscopy (AFM)


• Exposure to optical systems (lasers, fibres), electronics, or electro-mechanical systems


• Understanding of semiconductor processes


• Experience with scanning electron microscopes (SEM)


• Any involvement in product marketing or customer-facing technical storytelling

Education / Qualifications:

Either a Master’s degree in Physical Sciences, Engineering, or similar, or a clear equivalent path through relevant experience.

We look for the five Cs from our colleagues:

• Customer Focused – Staying close to customer needs and delivering real value


• Caring – Creating a supportive, respectful environment


• Collaborative – Sharing ideas and solving problems together


• Commitment – Owning your work and following through


• Continuous Improvement – Always learning and pushing things forward

A bit about us:

Infinitesima is a privately owned company founded in 2001 as a spin-out from the University of Bristol. Our team of scientists and engineers is focused on enabling the next generation of semiconductor devices through innovative, world-leading products.

We value different perspectives and believe diversity fuels better thinking and stronger outcomes. If you need any adjustments during the hiring process, just let us know — we’ve got you.

A note on how we run interviews:

We use AI only to transcribe interviews so we can stay fully present with you. It plays no part in decision-making — all hiring decisions are made by people.

Location and work pattern:

You’ll be based in Abingdon (OX14 1RG).
We ask new starters to be on-site during the first 3 months, with flexible hybrid working available after probation.