Fermentation Process Engineer

Fermentation · Davis, California
Department Fermentation
Employment Type Full-Time

Process Engineer

Davis, CA | Fermentation | Full-Time


Job Description

About Joywell Foods

Joywell Foods’ mission is to help people eat better & live better - while still loving their favorite foods.


From 1988 to 2016, US morbid obesity grew from 23% to 40%. The prevalence of sugar in the American food landscape has resulted in more than 100M pre-diabetics/diabetics.  Sugar, in all its forms, is among the chief culprits.  Joywell is a food technology & consumer goods company that is focused on solving that problem by unlocking the power of plant-based, sweet proteins in our favorite foods.  The result?  Far fewer calories, protein-based digestion with no glycolic affect or health unknowns & still, the same great tastes we all love!


Founded by an amazing scientist out of Cal Berkeley, 7-years of R&D under our belts on the cusp of commercialization & backed by top-tier Silicon Valley investor Khosla Ventures & food-industry investor Evolv Ventures — Joywell is primed for success.  Come join us help consumers have their cake & eat it too.

We are searching for a hands-on Process Engineer to join our Fermentation team to develop the next-generation, nutritious sweeteners that will transform food and human health. This role will focus on strain validation, bench-scale fermentation, scale-up, and production of our fermentation-based naturally sweet proteins. The ideal candidate will have a background in microbial fermentation and a strong fundamental knowledge of functional proteins. This position will report to the Director of Biology.





  • Design, plan, and execute fermentation experiments; analyze data, develop conclusions, and make recommendations.
  • Develop material and energy balances for the manufacturing process, and validate them using online, at-line, and offline measurements of the lab process.
  • Work with and improve data capture systems to store data and metadata about the experiments. Manage process controls and track process variations.
  • Analyze, interpret, and report fermentation data using data analysis tools (eg. JMP etc.) to inform strain screening/validation and to guide process improvements.
  • Troubleshoot experimental, operational, and equipment issues and implement solutions
  • Scale up process improvements from lab to pilot and manufacturing scales. Develop process flow diagrams.
  • Document and share findings through maintenance of scientific notebook, technical reports, oral presentations, and project updates; actively review scientific literature
  • Support fermentation operations including media preparation, bioreactor setup, equipment cleaning and sterilization, instrument calibration, sampling, and metabolite measurements.
  • Develop, maintain, and follow standard operating procedures (SOP’s)
  • Collaborate with Strain Engineering, Downstream Processing, Analytical Sciences, and Product Development teams on strain validation, process development / optimization, analytical characterization, sensory evaluation, and regulatory approval



  • Bachelor’s degree in chemical engineering or related field with 0-3 years of relevant industry experience, or a Master’s degree in chemical engineering or related field with relevant experience
  • Experience with microbial fermentation; familiarity with bioreactor equipment, instrumentation, and control systems
  • Experience in experiment design (DOE) and statistical analysis of technical data is preferred.
  • Ability to write data analysis and process scripts (Python, R, etc.) is a plus.
  • Strong analytical and problem solving skills; outstanding written and verbal communication
  • Flexibility and adaptability to meet the dynamic needs of a startup environment


This is a hands-on position that will require the incumbent to be onsite in the Davis HQ location.

We want the best people and we don’t want biases holding us back. We strongly encourage people of every color, orientation, age, gender, origin, and ability to apply. Because we value a diverse workplace, we prioritize an inclusive climate absent of discrimination and harassment during the application process and after you join the team.

Research indicates that men tend to apply for jobs when they meet just 60% of the criteria, while women and other marginalized groups only apply if they are a 100% match. If you are passionate about our mission and think you have what it takes to be successful in this role even if you don’t check all the boxes, please apply. We’d appreciate the opportunity to consider your application. 

Thank You

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  • Location
    Davis, California
  • Department
  • Employment Type