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MR Hardware Physicist
About Wellumio

Wellumio is a venture-backed medical device company on a mission to create universal access to diagnostic imaging.

Magnetic resonance is the gold standard modality in medical imaging due to its exceptional soft tissue contrast. However, its accessibility is limited by high costs and the need to transport patients to scanners. At Wellumio, we are driven by a simple yet transformative idea: instead of bringing patients to the scanner, we bring the scanner to the patients, wherever it is needed.

 

By providing point-of-care imaging, Wellumio enables healthcare professionals to deliver earlier diagnoses, faster treatments, and better outcomes. Our second-generation scanner, Axana, is 99% lighter than conventional MRI systems, making it the most portable head magnetic resonance imaging system in the global brain and neuroimaging market.

 

The company's first target application is acute stroke, a leading cause of human mortality and disability. Currently, only 1.5% of patients receive treatment within the critical time window due to reliance on in-hospital imaging. Wellumio's point-of-care solution addresses this, making effective stroke treatment accessible wherever patients are.

 

With stroke projected to cause 7.5 million deaths and cost $1 trillion annually by 2030, there is an urgent need for cost-effective technologies that can streamline care pathways for stroke and other neurological conditions where time is critical.

 

Why should you be part of Wellumio's success story?

  • To work with a talented and passionate team dedicated to positively impacting the medical device industry.

  • To grow your skills and knowledge through ongoing training and development opportunities.

  • To work in a dynamic environment that rewards creativity, innovation, hard work, and continuous improvement.

 

At Wellumio we're challenging dominant models of clinical service delivery by fusing technology, design innovation, medical expertise, and systems-level thinking to create imaging solutions that put the needs of patients first.

About the Role

The MR Hardware Physicist provides the specialist physics expertise required for the design, prototyping, and characterisation of Axana's core MR hardware systems, including magnet arrays, RF coils, and gradient coils. This critical role bridges the gap between theoretical electromagnetic simulation and hands-on hardware implementation. You will work at the intersection of physics and engineering to ensure Axana's hardware platform delivers the performance required for high-quality point-of-care clinical imaging, driving the development from initial concept through to verified prototype units.

Key Responsibilities

Working in partnership with relevant departments, you will:

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MR System Characterisation

  • Characterise Axana's magnetic and RF field performance: B0 homogeneity, B1 field mapping, gradient linearity, and noise floor

  • Develop physical models linking hardware parameters to image quality metrics

  • Design and execute phantom studies to characterise and benchmark system performance against specifications

 

Signal Optimisation & Pulse Sequence Input

  • Contribute to pulse sequence development and optimisation, providing physics-level input on acquisition strategy

  • Analyse SNR, CNR, and artefact characteristics; identify root causes of image quality limitations

  • Collaborate with Data Science teams on signal acquisition and reconstruction physics

 

Field Safety & Compliance

  • Provide physics-level analysis of RF power deposition and SAR estimation relevant to patient safety

  • Support RF electromagnetic compliance activities and regulatory submissions requiring physics justification

  • Advise on patient RF and magnetic field exposure considerations for the clinical study protocol

 

Clinical Measurement & Evidence Generation

  • Participate in clinical feasibility study activities from a physics standpoint: measurement protocols, QC procedures, and site-level performance validation

  • Contribute to analysis and interpretation of clinical scan data from a physics perspective

  • Produce written physics analyses and reports suitable for clinical and regulatory audiences

 

Research & Literature Connection

  • Identify published work relevant to Wellumio's technical claims and performance benchmarks

  • Contribute to publications and conference presentations as appropriate

Qualifications & Experience

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  • PhD or Master’s in Physics or Electrical Engineering with a strong focus on MR hardware design, electromagnetics, or scientific instrumentation

  • Proven track record of hands-on laboratory experience building prototypes and complex electromagnetic hardware

  • Research or industry experience with MRI hardware characterisation, coil systems, or novel/portable MRI platforms preferred

  • Experience in an academic, research institute, or medical device context

 

Technical Capabilities

  • Proficiency in electromagnetic simulation (e.g., HFSS, CST, COMSOL) and hardware-software automation (Python, MATLAB, LabVIEW)

  • MRI simulation tools: Bloch simulation, EM simulation for RF field characterisation

  • Expertise in MR hardware: magnet design, RF coil design or gradient coil optimisation

  • Experimental physics: laboratory measurement design, uncertainty analysis, and data interpretation

  • Familiarity with medical imaging standards and clinical measurement requirements

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Skills & Behaviours

  • Scientifically rigorous: approaches every measurement with reproducibility and uncertainty quantification as the baseline

  • Translates physics complexity into engineering and clinical language with clarity and confidence

  • Thrives in a small team where the problems are hard and the path forward is not always defined

  • Publication-quality analysis discipline applied to every deliverable — even when it's internal

 

Soft Skills Requirements

  • Strong scientific curiosity and drive to solve complex technical problems

  • Growth mindset and willingness to learn through coaching, feedback, and hands-on development

  • Clear communicator who can explain complex physics and algorithms in practical terms

  • Collaborative approach to working across multidisciplinary teams

  • Strong attention to detail and commitment to high-quality technical work

  • Ownership mindset with the ability to follow through on complex development tasks

  • Adaptable and comfortable working in a fast-paced, evolving startup environment

  • Professional, reliable, and committed to Wellumio’s mission

What Success Looks Like

  •  Axana's physics performance is characterised, documented, and defensible for clinical and regulatory audiences

  • SNR, B1 homogeneity, and key performance metrics are formally benchmarked against specifications

  • Physics inputs to regulatory submissions are complete, credible, and reviewer-ready

  • Clinical study measurement protocols reflect best-practice physics-level QC

  • At least one physics-related publication or conference contribution is in preparation or submitted

Soft Skills Requirements

  • Strong problem-solving and analytical skills

  • Ability to work independently and as part of a team

  • Good communication and collaboration skills

  • Willingness to learn and continuously develop technical expertise

  • Professionalism, reliability, and attention to detail

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