Jack & Jill
Product Manufacturing Engineer (£35k-£50k + Equity) at Shellworks
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This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.
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Job Title
Product Manufacturing Engineer
Salary
£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.
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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.
Who are Jack & Jill?
Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
How does this work?
- Jack's an AI agent for job searching and career coaching. He works for you.
- Jill is the AI recruiter working for the company. She recruits from Jack's network.
- If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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