Product Development Engineer

Job Title: Product Development Engineer

Reports to: CTO

Start Date: asap

Hours of Work:  Full-time (37.5 hours per week) or 80% PT

Salary: £35-45k per annum (FTE), pro rata for part-time, depending on experience

Location: White City, London

Please send your CV and a cover letter explaining what you can bring to MediSieve to jobs@medisieve.co.uk.

The Opportunity:

Imagine a world where doctors can precisely target and remove infected cells, pathogens, toxins, or even viruses directly from a patient’s bloodstream. At MediSieve, we are turning this vision into reality.

If you’ve always dreamt of making a global impact, MediSieve is the place to be! The platform nature of our technology enables us to make a difference in treating humanity's most serious diseases. Our initial product is focused on enabling AAV gene therapies and thus broadening the accessibility of these treatments. Join our diverse, energetic, and fun team at the most exciting time – just before our animal trials begin!

You’ll play a vital role in both the development and practical application of our filtration system. Working closely with the bead development team, you’ll help design, build, and test prototypes, including clinical-scale and miniaturised versions used for preclinical investigations. You'll also support the integration of our system into clinical-grade extracorporeal circuits for in vivo and clinical use.

This is a hybrid role combining hands-on laboratory work with planning and coordination responsibilities. You’ll contribute directly to prototype development and testing, while also supporting activities such as supplier engagement, resource planning, and risk analysis. Your work will span the design of new components, drafting and refining protocols, conducting experiments, analysing results, and preparing technical documentation.

What you’ll be responsible for:

• Design and develop prototype products and test systems

• Conduct performance testing of flow systems (extracorporeal circuits at lab and clinical scale)

• Assemble and test prototypes (filters, magnets, tubing circuits)

• Plan and execute experiments

• Support day-to-day lab operations (inventory, purchases, waste management)

What we look for in a candidate:

• Degree in a relevant engineering discipline (e.g. Biomedical, Mechanical, or Design Engineering).

• At least 5 years’ post-graduation experience in a relevant R&D or prototyping role (candidates with 3 years of experience in a blood contacting medical device role will be considered)

• Strong hands-on skills in prototype assembly and mechanical systems

• Experience in medical device or biotech development

• Proficiency with CAD software (e.g. SolidWorks, Fusion 360)

• Familiarity with engineering modelling tools and 3D printing

• Confident in protocol development and troubleshooting

• Competence in data analysis, including Excel

• Strong documentation and reporting skills

Not essential, but helpful:

• Background in blood-contacting medical devices or extracorporeal treatments/devices

• Experience with injection moulding

• Knowledge of ISO 13485 quality systems

• Experience working in controlled environments or labs

You’ll love this job if you are:

• Proactive and adaptable

• Highly organised and detail-oriented

• A problem-solver with a hands-on mindset

• Passionate about our mission

• Team-oriented

Conditions:

• 3% Company pension

• 25 days holiday (pro rata for part time)

• Pirkx membership

• Share options scheme

• A vibrant community at Scale Space in White City, London

Diversity Commitment: We believe that diversity enables us to see situations from different points of view, leading to ideas and insights which would otherwise be missed. We are focused on building an inclusive team of people of all backgrounds, experiences, abilities, and perspectives. We are diverse in gender, origin and economic background. Everyone is welcome — there will be no judgement towards things that make you You!

Learn more about us at https://www.medisieve.com