Graduate​/Junior Software Engineer

A fantastic opportunity has become available for a Graduate/Junior Software Engineer to join Caristo Diagnostics rapidly growing team. Based in Oxford, you will work in our global Engineering team with colleagues in both U.S. and UK.

With the first and only FDA approved (July 29, 2026) coronary artery inflammation diagnostic medical device, CaRi-Heart®, Caristo Diagnostics is a global leader in AI technologies for cardiovascular disease, founded as a spin-out from the University of Oxford in 2018. Caristo also has an FDA approved (2025) coronary artery plaque diagnostic medical device. Its award-winning inflammation technology helps detect hidden heart disease and identify people at risk of a heart attack before symptoms appear allowing for proactive disease management.

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  or follow Caristo on Linked In, You Tube, and X.

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 clinical use in US, UK, Europe, and Australia and is in use with a growing number of hospitals and clinics. 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.

This individual will join a talented and expanding cross-functional engineering team developing the end-to-end software system running Caristo’s groundbreaking CaRi-Heart® technology. Will write complex code, debug issues, and solve challenging technical problems, often taking ownership of specific project areas.

The ideal candidate will:

• be motivated at the thought of working in an innovative healthcare start-up with a strong collaborative research and operations culture, helping to build a global business that will have material impact on the health and wellbeing of potentially millions of people.
• share the company values of pushing the boundaries, taking ownership, caring for each other and acting with candour and professionalism

Job Title Graduate/Junior Software Engineer

Department Engineering

Location Oxford, UK

Responsibilities Responsibilities include some or all of the following:

• Development and maintenance of cloud-based medical imaging software system
• Engagement with internal and external stakeholders and users (Operations team, hospital IT, clinicians) to deliver effective solutions to meet business needs
• Provide installation and technical support for Operations and customers
• Development and maintenance of a Continuous Integration and Continuous Delivery pipeline, including test automation
• Participate in code reviews to ensure code quality and identify potential issues.
• Collaboration with engineering team, operations, research and image analysts.
• Documenting code, systems, and processes in line with Caristo quality system, ensuring that knowledge is shared and maintained
• Actively contribute to process improvement and quality objectives.

Skills & Experience Required:

• BSc/BEng degree in a related technical discipline or equivalent practical experience.
• Experience in Python programming or equivalent language
• Experience of working with IDE, source control systems, issue tracking systems and build systems.
• Excellent communication and collaboration skills

• Medical imaging experience
• Experience working in a regulated industry
• Technology experience:
• Backend databases
• LINUX system administration and operation
• AWS services, architectures and…