Refeyn is the world's pioneer in mass photometry – a ground-breaking technology that weighs individual molecules and particles with light. It transforms our ability to characterise the composition, structure and dynamics of biomolecules and biomolecular complexes, nanostructures, and viral capsids.

Since being spun out of the University of Oxford in 2018, Refeyn has been developing mass photometry instruments and delivering them to customers around the world – at leading academic institutions and in biopharma. We are continuously pushing the boundaries of what mass photometry can achieve.

With headquarters in Oxford, UK as well as offices in the US, we are a growing, global company with a team of over 130 employees (and growing). In addition to achieving market success, Refeyn has attracted a high level of investment – we raised $70m in our Series B funding round in March 2022.

At Refeyn, we are fiercely proud of our talented workforce, whose creativity, tenacity and skills have enabled us to evolve into a successful, well-funded and rapidly growing company in just a few years. To achieve our ambitions – to transform analytical workflows in the life sciences, biopharma and beyond with mass photometry – we are continuing to expand our workforce.

We strive to be an outstanding place to work – by maintaining a positive and inclusive culture, offering competitive salaries and benefits, encouraging ongoing training and development, plus, of course, plenty of other perks.



Quality Engineering

  • Working with the consumables team to improve and maintain safety and quality standards.
  • Designing and implementing clean room processes across the business including setting the standards for documentation. This encompasses work instructions, process records, document control and control of electronic data including test records.
  • Own and drive process with regards the customer complaints, internal manufacturing and external supplier originated NCR’s.
  • Managing the non-conformance reporting and supplier return function, as well as working with engineers to set the appropriate specification and tolerances for individual parts.
  • Working closely with sales and technical support to ensure that customer issues are investigated thoroughly, root causes traced, and corrective actions are implemented.
  • Mentoring and Training more junior members of the Quality & Production Team.
  • And any such tasks requested by the Quality Manager.

Company and Product Compliance

  • Continually improving the process in line with ISO9001:2015 requirements.
  • Working with the development team, helping to ensure CE mark certification is achieved in a timely manner.

The Candidate

Essential experience:

  • Engineering degree or equivalent
  • Experience of working independently and enhancing the quality of a product and its supply base. Very good understanding of manufacturing processes to support the business.
  • Previous experience leading on manufacturing audits and implementing quality improvements. Understanding of how quality practices can be applied to give a commercial advantage.
  • Ability to read engineering drawings and use of statistical models to ensure the capability of production processes.
  • Practical experience of problem-solving tools, FMEAs, Corrective and Preventative Actions.
  • Ability to build long term successful working relationships to ensure the continual improvement culture is present through the production team.
  • Experience of implementing Lean philosophy would be an advantage.
  • Previous experience of testing and quality management in a consumable business.
  • Previous experience working on ISO 9001:2015 implementation and accreditation.


  • Experience of implementing Lean philosophy would be an advantage.
  • Previous experience of testing and quality management in a consumable business.
  • Experience of implementing a QMS.


  • Full-time employee, based in Oxford


  • 25 days annual leave, excess-free private health insurance, critical illness cover and income protection, up to 7% employer pension contribution, salary sacrifice nursery scheme, enhanced maternity, paternity and shared parental leave, charitable giving, development opportunities, wellbeing resources, gym and retail discounts plus on-site snacks and lunches.


Refeyn is committed to being an equal opportunities employer. We are working hard to create a safe and empowering environment for all, and firmly believe that there is great strength in building teams with different voices, experiences, perspectives and backgrounds. We welcome applicants from all sections of society to join us on our mission to transform analytical workflows using the power of light. 

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