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Refeyn Ltd

The pioneer in mass photometry, Refeyn produces a disruptive new generation of analytical instruments that measure the mass of individual molecules directly in solution.

Quickly and simply, Refeyn instruments can show sample purity and homogeneity, analyse biomolecular complex assembly or disassembly, quantify strength and kinetics of complex molecular interactions, and much more. We aims to accelerate research and enable discoveries by sharing mass photometry with the global scientific community.

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System Testing Engineer (Maternity Cover)

Refeyn Ltd

Oxford Operations 1w ago

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System Testing Engineer (Maternity Cover)

Refeyn Ltd · Oxford

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Operations Oxford Posted Apr 27, 2026

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

Analyse system requirements, functionality, and limitations from a software perspective
Develop and agree test plans (EPIC/storyboard level) with software teams
Execute functional testing across software using the Refeyn instrumentation
Identify, log, and track defects in line with company processes
Produce clear, detailed test reports and validate fixes through retesting
Conduct Factory Acceptance Tests (FAT) on production instruments
Support wider team activities as required

Qualifications

Bachelor’s degree in Engineering or Science

Skills & Experience required:

Advanced experience in software functional testing
Experience with laboratory instrumentation

Personal Traits

Agile team player
Proactive in helping others and prioritising to keep things moving

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

We anticipate a salary between £42,000 and £52,000 for this role, depending on the candidate’s experience.
25 days annual leave per year in addition to bank holidays
Up to 7% employer matched pension contribution
Private health insurance from day one plus critical illness cover, income protection and life insurance
Give as You Earn and Cycle to Work salary sacrifice schemes.
Annual Company and Individual bonus scheme

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.

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