Manufacturing Design Engineer
Confirmed on the employer's own hiring board on Oct 28, 2026. First seen by Alion on Jun 2, 2026.
London, N4
4 days in our office, 1 day from home (choose from Tue-Thu)
£40-50k per annum (depending on experience) + equity
About Shellworks
At Shellworks, we’re on a mission to make plastic waste a thing of the past. We’re creating a new generation of materials - sustainable, high-performing, and designed to disappear. By reimagining how materials are made, we’re tackling one of the world’s most urgent environmental challenges.
About The Role
We are looking for a candidate to help productionise new products into mass manufacturing. You will work closely with Engineering in the development of products, ensuring products are validated and de-risked before production. As part of our fast-paced, collaborative environment, you'll have the opportunity to make a tangible impact on the planet while growing your expertise. If you're passionate about using your engineering skills to solve complex challenges and create a better future, this is the perfect role for you.
Key Responsibilities
This is a unique opportunity to work on scaling the future of packaging materials inspired by nature. When you join us you’ll get to:
Bring new products to mass manufacturing by conducting product testing and validating for scale production.
Improving internal product validation processes by developing a repeatable product validation process and streamlining activities.
Implement best practices in physical product development, including documentation, change control, and other robust quality measures to ensure the highest standards of production quality and on-time delivery.
Assist in coordinating aspects of new product development across a variety of projects in injection moulding, extrusion blow, and compounding.
Work closely with our manufacturing partners, ensuring products meet cost, quality, and timeline expectations.
Be the critical technical and project interface between sales, engineering, supply chain, suppliers, and customers.
Collaborate on world-first projects across the molecular biology, mechanical engineering, product design and operations teams.
Our Ideal Candidate
Degree in a relevant engineering discipline, such as materials science or mechanical engineering.
You have over 2-4 years of proven experience in a relevant industrial manufacturing environment or in physical product development, ideally with exposure to polymers and plastic components.
Experience with some of the following manufacturing technologies: injection moulding, blow moulding, compounding, or extrusion for plastic packaging.
Experience in CAD - Onshape, Solidworks preferred.
Experience in scaling production from prototype to high-volume manufacturing, with knowledge of both in-house and outsourced FMCG production being an advantage.
Self-motivated and proactive, you thrive in a high-autonomy environment within a dynamic, early-stage start-up and excel in managing outsourced production partnerships and holding them accountable.
Good written and verbal communication skills to communicate effectively to both partners and clients.
What we offer
28 days holiday + statutory holidays
Enhanced parental leave - 12 weeks maternity at full pay, 6 weeks paternity at full pay
Heka wellbeing allowance - to spend on what matters to you - gym, therapy, nutrition, learning, fertility and menopause support, and lots of other options!
Virtual GP - same or next day appointments and private prescriptions delivered to you
Cycle to work scheme - buy, subscribe to, or share a bike with savings of up to 42% via salary sacrifice
Competitive salary + equity options
Growth and development opportunities as we scale
Regular socials + daily catered lunch at the office
A tightly knit, passionate team making a real impact
Hiring Process
Initial Chat
Technical task
Onsite
Founder Chat
Join Our Mission
Becoming a part of Shellworks means being part of a team that’s passionate about sustainability and innovation. Our world-class team includes experts in materials science and visionary entrepreneurs dedicated to creating a better future. Together, we’re redefining what’s possible.
Are you ready to help us lead the way in sustainable materials? Apply now and be part of something truly impactful.