
We are seeking a System Testing Engineer (12 months maternity cover) to lead end-to-end system testing, from requirements analysis through to certification, playing a key role in developing and executing robust test strategies.
The Role
Qualifications
Skills & Experience required:
Personal Traits
Location:
This position is based on-site, min 3 days per week in our Oxford office (Littlemore, Trade City)
Why work for Refeyn?
Compensation and core benefits
Family Friendly Benefits
Refeyn offers YellowNest Nursery Scheme to all employees once probation is passed, and new parents can benefit from up to 17 weeks fully paid maternity, adoption and shared parental leave, 4 weeks fully paid paternity leave, plus an annual allowance for emergency childcare.
Supporting your Development
All employees receive access to Linkedin Learning which offers thousands of courses to support their personal and professional development. We also run frequent training sessions on both hard and soft skills.
Creating an Engaging Culture
Refeyn supports hybrid working where the role allows and offers flexible start and finish times. We also have a subsidised weekly lunch for onsite employees and a vibrant social calendar which includes holiday parties and midsummer festivals plus an annual team budget for managers to plan team-building activities.
Values-Led
Refeyn is committed to celebrating each other’s differences and creating a dynamic, driven and diverse culture where everyone can flourish. We are proud to have been awarded Committed Status by the Inclusive Employers Standard in 2024 and are working hard to create a safe and empowering environment for all.
We firmly believe that there is great strength in building teams with different voices, experiences, perspectives, and backgrounds so that we can continue to share the team workload and enable our customers to succeed, and we welcome applicants from all sections of society to join us on our mission to transform analytical workflows using the power of light.
Refeyn is proud to use anonymised hiring practices. Identifying information such as a candidate's name, email address, date of birth and photo will not be visible to the hiring manager when they review CVs.

Refeyn is pioneering the next era of molecular analysis with mass photometry, a breakthrough technology that weighs individual molecules with light. Our instruments deliver rapid, direct insights into biomolecular function and structure, accelerating discovery and transforming biotherapeutic development. With 1200+ citations, 600+ global installations, and use in Nobel Prize–winning research, Refeyn is shaping the future of scientific innovation.