Process Engineer
Confirmed on the employer's own hiring board on Oct 26, 2026. First seen by Alion on Oct 22, 2026. Shellworks scores B on the Alion truth index.
Process Engineer
London, N4
4 days in our office, 1 day working from home
Reporting to States
£45-60K + equity
About Shellworks
Our vision is a world where the products around you don't damage our environment or our health. At Shellworks we're making that a reality by creating high performance plastic-free materials for everyday products.
Our technology Vivomer makes the impossible possible. It's grown by bacteria using fermentation, creating a material that is stable in use but degrades in every environment. Its breakthrough is being dishwasherable and home compostable at the same time.
We've closed our Series A and are working with some of the world's most recognised brands to replace plastic at volume. We're at an inflection point: scaling from proof-of-concept to mass-market production.
The mission of this role
This is a hands on, high ownership role. You'll take new injection moulded products from design into mass production, working closely with our design engineers and manufacturing partners.
We're looking for someone who loves being on the line, solving problems at the press, and building the systems that mean we only solve them once. Underlying this you have the technical knowledge to hold our moulding partners to cost, quality and timeline.
Key Responsibilities
Design for manufacture
Review new parts and tools with our design engineers before steel is cut
Push for the design changes that make parts mouldable at volume and at the lowest cost
Quality
Write the quality plan for each product: critical dimensions, inspection, sampling and acceptance criteria
Design the in line testing that proves we hit spec at scale
Run tool trials, process window studies and DOEs
On the line
Lead products from first off tool through to sign off and ramp
Get to root cause on line issues and fix them for good
Line performance
Track OEE, cycle time and scrap across our moulding partners
Find the bottlenecks as we ramp, and bring a better setup when the current one isn't working
Project management
Own the launch plan for each product from first tool to ramp
Keep design, materials, partners and customers aligned, and flag risks early
Innovation and technology
Work with our materials team to build process know how for moulding Vivomer
Explore new tooling, automation and inspection technology to scale faster and cheaper
Beyond
Set up documentation and change control across our partners
Build our playbook for bringing new products into production
Who You Are
3 to 5 years in injection moulding, ideally plastic packaging or high volume consumer products
A degree in mechanical engineering, design engineering or materials/ chemical engineering with industry experience in CAD & tooling
You've brought new tools into production and stood next to a press solving a problem
Process fluency: process windows, scientific moulding, DOEs
Quality fluency: metrology, SPC, capability studies
Comfortable reviewing CAD and tool designs, Onshape or Solidworks preferred
Confident holding manufacturing partners to account
Excited to build the frontier of how materials are made
High tolerance for ambiguity, low tolerance for bureaucracy
Excited about international travel to different manufacturing sites
Our Benefits
28 days holiday + statutory holidays
12 weeks maternity, 6 weeks paternity, both at full pay
Heka wellbeing allowance - gym, therapy, nutrition, fertility support and more
Virtual GP with same or next day appointments
Cycle to work scheme - save up to 42% via salary sacrifice
Daily catered lunch at the office