Product Manufacturing Engineer (£35k-£50k + Equity) at Shellworks

Product Manufacturing Engineer

£35k-£50k + Equity

Company Description

Shellworks is a Series A sustainable materials startup of 35 people in London replacing single‑use plastic with Vivomer, a compostable bio‑based material. Backed by top‑tier investors, they are scaling manufacturing across the UK, EU, and US to create a new generation of high‑performing materials designed to disappear.

Job Description

As a Product Manufacturing Engineer, you will bridge the gap between R&D and production to scale sustainable packaging. Working in a small, high‑impact team, you’ll take products from prototype through validation to volume manufacturing, ensuring quality and performance while collaborating with international manufacturing partners to eliminate plastic waste globally.

Location

London, UK

Why this role is remarkable

• Join a mission‑driven Series A company scaling a proprietary, nature‑inspired material (Vivomer) that naturally breaks down to replace harmful single‑use plastics.
• Gain high‑impact ownership in a small team of three, managing the critical transition from R&D prototypes to global mass production across the UK, EU, and US.
• Access a fully equipped on‑site lab and pilot line workshop in London, offering a unique hands‑on environment for technical innovation and material experimentation.

What You Will Do

• Own the end‑to‑end product validation process, taking packaging designs from initial prototypes to high‑volume manufacturing via injection moulding and extrusion.
• Manage technical relationships with outsourced manufacturing partners to ensure production meets strict cost, quality, and timeline expectations for global scaling.
• Implement robust quality measures and engineering change controls to streamline the development cycle across molecular biology, design, and operations teams.

The ideal candidate

• Holds a degree in Materials Science or Mechanical Engineering with 2‑4 years of experience in an industrial manufacturing or physical product development environment.
• Demonstrates deep technical proficiency in polymer processing technologies, specifically injection moulding, blow moulding, compounding, or extrusion for plastic packaging.
• Proficient in CAD software (Onshape or SolidWorks) and experienced in scaling products from prototype to high‑volume FMCG production with a proactive, startup‑ready mindset.

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