FL 116: Protein Chemistry Co-Op

Flagship Pioneering Co-Op Program
Cambridge, Massachusetts, United StatesPosted Sep 2, 2026

About the role

Position Summary

What if you could synthesize custom biomolecules on a bench-top, at the push of a button? FL116 is an early stage stealth biotechnology company developing breakthrough biochemistry to design and build custom biological molecules. We’re looking for a curious, motivated coop student to join our Chemical Biology team and contribute directly to our core polymer-synthesis platform. In this role, you’ll learn about the chemistry of biomolecules and proteins while developing your skills as a professional scientist. This position is ideal for biologists eager to deepen their understanding of the chemistry of life—or chemists excited to see their work come alive in biological systems.

Responsibilities

Characterize the behavior of novel proteins that synthesize polymers Get hands-on with our prototype device to synthesize new biological materials Design and execute statistically guided experiments to improve our polymer synthesis cycle Analyze and purify biological molecules with liquid chromatography systems Share results and insights with a closeknit startup team Draft and maintain protocols, SOPs, and Benchling documentation Why This Role Matters FL116’s Chemical Biology team helps drive the company’s foundational research and process development. A successful co-op will contribute to one or both work streams depending on their interests and background. As a coop, you’ll contribute to experiments that directly enable the synthesis of larger and more complex biomolecules—opening new routes and capabilities for the platform. Because we’re an early stage startup, your work won’t disappear into a black box. You’ll see the real impact of your contributions and gain firsthand exposure to how scientific decisions shape company direction. Team & Collaboration We’re a small, collaborative group, and coops work closely with scientists across functions. You’ll have ownership, mentorship, and visibility, all while seeing your work directly influence our progress. Requ

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