Power of Attorney for SEC Filings

This filing documents a Power of Attorney granted by Otitoju Kolawole A., Chief Business & Strategy Officer of 908 Devices Inc., to Kevin J. Knopp, Joseph H. Griffith, and Mark S. Levine. This authorization allows the appointed individuals to execute and file SEC Forms 3, 4, and 5, including any amendments, on behalf of Otitoju Kolawole A. The purpose is to comply with Section 16(a) of the Securities Exchange Act of 1934. The attorneys-in-fact are empowered to take all necessary actions for the timely filing of these forms with the SEC and other relevant authorities. The Power of Attorney remains effective until Otitoju Kolawole A. is no longer required to file such forms, revokes it in writing, or the attorney-in-fact leaves the company. The document was signed on April 16, 2026.