Senior Software Engineer (C#)
Would you like to be instrumental in enabling the next generation of semi-conductors?
Are you an experienced Senior Software Engineer (C#) with high‑level, production‑grade coding expertise and industrial automation skills? Are you a confident leader and mentor? Ever dreamt of developing advanced software solutions for semiconductor inspection systems using Atomic Force Microscopy (AFM)? Would creating high‑performance, precision‑control software for metrology and defect‑inspection tools inspire you? Do you have experience with motion controllers, piezo actuators, and high‑res sensors? If this sounds like you, read on…
Reward and Benefits:
- £58,000 to £65,000 (depending on experience)
- 25 days annual leave, death in service and private health care benefits, personal pension contributions of 4% with salary sacrifice and a generous EMI Share scheme
Based in Abingdon, Oxford, UK, we are a high calibre team of 100 plus people and we are growing fast. We are backed by global financial and industry investors including Applied Ventures, the strategic venture arm of the industry leading equipment company.
About the role:
A typical day for a Senior Software Engineer (C#) could look like this:
- Developing junior team members – supporting capability across the team through recruitment, mentoring and coaching
- Role Modelling technical leadership – supporting high standards across the C# codebase, including code quality, design patterns, and architectural consistency
- Facilitating continuous improvement – enhancing team capability, processes, tools, and ways of working, while leading by example with a practical and creative approach
- Collaborating across engineering – working within a matrix environment alongside architects, project leads, and technical managers, while ensuring delivery commitments are met
- Planning delivery – owning sprint planning and estimation, ensuring plans are realistic, transparent, and aligned to customer release expectations
- Managing dependencies – proactively identifying and resolving cross‑functional challenges, particularly across C#, LabVIEW, and Data Analysis interfaces
- Engaging stakeholders – communicating delivery status clearly to technical and non‑technical stakeholders, supporting programme planning and customer readiness decisions
- Leading key conversations – facilitating stakeholder meetings and working through complex technical or customer challenges
- Collegiate approach – getting involved in technical work where useful to support the team and unblock delivery
Who we are looking for:
To succeed as a Senior Software Engineer (C#), we do need you to have experience of:
- Bringing a self‑motivated approach and supporting the team to delivering high‑quality outcomes, while inspiring others to performing at their best and contributing towards shared goals
- Communicating effectively through confident verbal and written communication skills in English, while explaining complex technical concepts clearly to both technical peers and non‑technical stakeholders, and influencing alignment and key decisions
- Applying technical capability – building on a hands‑on C# software development background with a minimum of 5 years’ industry experience
- Designing scalable solutions – applying knowledge of C# .NET architecture, including design patterns, MVVM for UI, and threading models
- Developing user interfaces – working with WPF or equivalent technologies to delivering effective UI solutions
- Working in agile environments – contributing within sprint‑based delivery and applying agile or lean approaches pragmatically in a multi‑disciplinary setting
- Planning and communicating delivery – owning and communicating phased delivery plans, including milestones, assumptions, dependencies, and confidence levels
- Ensuring software quality – supporting quality assurance activities, integration testing, and controlled release processes for customer deployments
- Managing product lifecycle processes – working with requirement traceability, design reviews, and ticket management tools (e.g. Jira) from concept through to delivery
Nice to have:
- Familiarity with semiconductor inspection tools, metrology systems, or image‑analysis workflows
- An interest in SCADA systems, HMI development, or industrial IoT technologies
- Python, C++, or other programming languages
- An understanding of networking concepts such as TCP/IP or routing
- Awareness of cleanroom practices and safety standards (e.g., IEC 61508)
Education / Qualifications:
- Degree in Computer Science, Electrical Engineering, or related field (or equivalent experience).
- 8+ years of experience in software development with strong proficiency in C#, WPF, .NET, and Windows-based applications.
We look for the five Cs from our colleagues:
- Customer Focused – Staying close to customer needs and consistently delivering value that builds trust.
- Caring – Creating a supportive environment where people look out for each other and can thrive.
- Collaborative – Sharing ideas openly, communicating clearly, and working together to solve problems.
- Commitment – Taking ownership, following through on promises, and acting with integrity.
- Continuous Improvement – Always learning, challenging the status quo, and improving how we work and deliver.
A bit about us:
Infinitesima is a privately owned company founded in 2001, as a spin-out of the University of Bristol, by CTO Professor Andrew Humphris. Our dynamic team of scientists and engineers is focussed on enabling the next generation of semiconductor devices through delivery of innovative products to customers around the world.
Our strength lies in the varied perspectives that come from different cultures, experiences, and identities. We believe that true innovation is fuelled by collaboration, locally and globally. We strive to foster an environment where everyone can contribute meaningfully and thrive. If you require adjustments to take part in the recruitment process, please let us know, we’ll do our best to support you.
We use AI only to transcribe our interviews so we can focus fully on you instead of scribbling notes. The AI does not take part in any decision making at any stage. All hiring decisions are made by real humans based on the conversation we have with you.
Location and work pattern:
All of our new UK team members are asked to work on site here at Abingdon during their first three months with us. We offer flexible, hybrid working where possible upon completion of probation.
Note to recruitment agencies: Infinitesima Ltd only works with approved agencies and does not accept unsolicited agency CVs. Please do not submit candidate details in response to this advert, or to any Infinitesima Ltd employees. Infinitesima Ltd is not responsible for any fees related to unsolicited CVs.
If you’re interested in APPLYING (respectfully, no agencies) for this role, feel free to reach out to me for more information: [email protected]
