Founder Associate internship

Who Are We?

Syntetica is an early-stage chemical startup on a mission to decarbonize the textile industry through textile-to-textile recycling — starting with nylon.

Today, most synthetic textiles are made from crude oil, and less than 1% are recycled back into new fibers. We're here to change that. At Syntetica, we’ve developed a patented depolymerization process that breaks down nylon-rich textile waste into virgin-equivalent nylon monomers — while separating materials like elastane, polyester, and cotton for further recycling.

Backed by Entrepreneur First, we’ve raised €4.2M from leading investors including EQT Ventures, the family offices of Peugeot and Etam, as well as high-profile athletes like Paul-Henri Mathieu and Jean-Éric Vergne.

We’ve already forged key partnerships with major textile players like Victoria’s Secret and ETAM — as well as leading fast fashion and sportswear brands — and have assembled a core team of 12 experts.

If you want to help bring truly circular materials to global scale — and solve one of the textile industry’s biggest sustainability challenges — come build with us.

Syntetica raises €4.2M to close the loop in nylon recycling

Victoria’s Secret, Etam Nylon Recycling Specialist Syntetica Raises 4.2 Million Euros

Mission and Key Responsibilities

As a Founder’s Associate Intern, you will be the right hand to our CEO and a key player in driving strategic initiatives across production, commercial development, fundraising, and project management.

You will also work closely with Operations and R&D teams to accelerate Syntetica’s growth in green chemistry.

Your key responsibilities will include:

Commercial & Fundraising support

• Participate in preparing investor materials (pitch decks, updates, data rooms)
• Commercial development incl. new customer acquisition and monthly touchpoints with the world’s biggest brands
• Support market research and business development initiatives

Product & Project Delivery

• Help coordinate timelines and deliverables with internal teams and external partners
• Track and support the execution of action items related to production deliverables
• Assist in liaising with suppliers, technicians, and manufacturing partners
• Help maintain and enforce quality control processes

R&D operational support

• Support the planning of R&D goals, resources, and equipment allocation
• Participate in performance tracking and reporting of R&D progress
• Help standardise workflows and contribute to internal documentation and training

Required background and skills

• Final-year student from a top engineering school (gap year or end-of-studies internship)
• Hands-on, structured, and rigorous with excellent analytical skills
• Comfortable with project management tools (e.g. Notion, Excel/Sheets)
• First experience in a startup, consulting, VC, or similar environment is a plus
• Full professional proficiency in English; French is a plus
• Excellent interpersonal and communication skills

You are:

• Highly motivated, proactive and a quick learner
• Able to manage multiple workstreams in a fast-paced environment
• Excited by building solutions with impact and ready to work hard to build something enormous

Recruitment Process

• 30-min introductory call with People Lead
• Case study/Practical exercise with Marco
• Final conversation with Florian, COO
• Offer!

Interesting infos

Location: Paris and Villejuif

Start date: July or September 2025

Duration: 6 months

Contract type: Full-time internship

Benefits: 50% of transport costs covered and 50% of health insurance covered (as per legal requirements), 70% of a Gymlib subscription covered by Syntetica