Finance Assistant

We're looking for an experienced, proactive Finance Assistant to join our growing team in Oxford. This is a unique opportunity to work closely with our UK Finance Director and play an integral role in supporting a fast-growing, innovative healthcare technology company.

About Caristo Diagnostics

Caristo Diagnostics is a global leader in AI technologies for cardiovascular disease, founded as a spin-out from the University of Oxford. Its award-winning technology helps detect hidden heart disease and identify people at risk of a heart attack before symptoms appear. Working with leading hospitals, research institutions, and pharmaceutical partners, Caristo aims to save lives through early detection and personalized prevention. The company was named a 2026 Technology Pioneer by the World Economic Forum in June 2026. Learn more at www.caristo.com or follow Caristo on LinkedIn, YouTube, and X.

About the CaRi-Heart® Technology

Named first of “7 Technologies That Could Change Heart Healthcare Forevermore” by the Robb Report, the CaRi-Heart® technology is Caristo’s flagship offering which uncovers hidden coronary inflammation, a key driver of cardiovascular disease, on routine Coronary Computed Tomography Angiography (CCTA).

The technology is regulatory-approved for commercial use in Europe and Australia, and is currently being piloted in several NHS sites. The CaRi-Heart Technology is also a receipt of the NHS AI award, and has been recognised by the British Heart Foundation as a game-changing innovation for preventing cardiovascular disease. Multiple patents underpinning CaRi-Heart technologies have been granted in major jurisdictions around the world. In addition, exceptional validation results showing CaRi-Heart’s ability to aid the prediction of heart attacks have been published in leading medical journals including the Lancet, JACC, European Heart Journal, and Cardiovascular Research.

About The Role

Job Title:  Finance Assistant

Work Pattern: Part-time, expected 20-25 hours per week. Flexibility on hours Flexibility on in-office vs remote working, but expectation of every Wednesday in office.

Department:  Administration, reporting to Finance Director in UK

Location: Oxford, UK

Responsibilities:

o Process supplier invoices, make payment runs, record receipts, process employee expenses, in all cases ensuring accuracy, approval, and timely payment.

o Assist with billing customers. 

o Undertake bank reconciliation, and record any inconsistencies to help Finance Director reconcile inaccuracies. 

o Assist Finance Director with preparing month-end accounts, and coordinate with external accountants as needed.

o General finance administration duties and identify discrepancies.

o VAT administration.

o Act as day-to-day point of contact for minor finance enquiries for UK employees on expense reimbursement, payroll, and supplier payment.

Skills & Experience Required:

o Proven experience with book-keeping. 

o Relevant qualifications in accounting or finance is preferred, but not mandatory for applicants with more than 5 years of experience. 

o Proficiency with accounting software – Dext, ApprovalMax, Xero or similar, SageOne, Xero and associated systems. 

o Strong understanding of accounts payable and receivable processes.

o Strong proficiency in Microsoft Office, Outlook, Teams, and other business collaboration tools.

o Exceptional attention to detail and a commitment to delivering high-quality work.

o Strong organisational and time-management skills, with the ability to manage multiple priorities and shifting demands. o Excellent interpersonal and communication skills.

o Sound judgment, discretion, and the ability to handle sensitive and confidential information.

Benefits: 

o Competitive salary

o 25 holidays per year plus bank holidays

o Enhanced pension contribution · Private medical insurance

o Life insurance

o Cycle-to-work scheme

o Additional benefits for long-service

Why join Caristo:

o Be part of a company at the cutting edge of medical technology, with the potential to save lives and revolutionise healthcare

o Join a dynamic and growing team, with opportunities for personal and professional growth

o Contribute to the development of groundbreaking products in a company poised for significant expansion

o Enjoy a supportive and collaborative work environment, with a strong emphasis on innovation, quality, and impact

Caristo Diagnostics is committed to diversity and inclusion, and encourages applications from all qualified candidates, including those making a step up in their career. If you are passionate about making a difference in the world of medical imaging and meet the above criteria, we would love to hear from you.

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