Senior/Principal Scientist, Cell Physiology/Media Development  Seattle, WA

Just is looking for a Senior/Principal scientist to join a fast-paced, collaborative, and multidisciplinary team to develop cell culture media for the advancement of low-cost biotherapeutics manufacturing.  The position requires a deep understanding of cell physiology, biochemistry, metabolism, experimental design and statistical analysis.  Experience with high throughput mammalian cell culture and assay development is highly desirable.  Strong written and verbal communication skills, including the ability to communicate effectively over teleconference and web-based meetings are necessary.  The ideal candidate is curious, creative, works independently and in teams, and looks for ways to improve processes and technology.


• Utilize understanding of cell physiology and metabolism to develop cell based models of high density perfusion processes

• Develop cell culture media formulations through analytical and cell culture-based experiments

• Develop and apply new methods to advance cell culture media technology

• Collaborate across the organization, with clients, and manufacturing groups


• BS in Engineering, Cell Biology, Molecular Biology, or related field with 10+ years of experience or Ph.D. with 2+years of experience

• Experience developing media for mammalian cell lines

• Experience with design of experiments (DOE) and statistical analysis

• Stay abreast of current literature as it relates to media development for recombinant protein expression

• Publish and present research

• Act as an internal technical resource


• Experience with high throughput cell culture (e.g. deep-well plate assays or robotics)

• Experience with bioreactor cell culture and perfusion technology

• Experience with JMP, R, Python

    About Just – Evotec Biologics

    Just – Evotec Biologics, wholly-owned by Evotec SE, is a unique platform company that integrates the design, engineering, development, and manufacture of biologics. With deep experience in the fields of protein, process and manufacturing sciences, the Just team came together to solve the scientific and technical hurdles that block access to life-changing protein therapeutics; from the design of therapeutic molecules to the design of the manufacturing plants used to produce them. Just’s focus is to create access and value for a global market through scientific and technological innovation. Our state-of-the-art labs and cGMP clinical manufacturing plant are co-located in Seattle’s South Lake Union neighborhood – the center of Seattle’s medical, global health, and technology industries and a noted top emerging life science hub in the U.S. Our fast-growing team of 100 employees is expanding Just’s innovative platform and footprint – building our first North American J.POD® commercial manufacturing facility in the Seattle area. For job opportunities, learn more at

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