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Senior Research Associate, Analytical Development

Janux Therapeutics, Inc.
San Diego, United Statesfull_timeVerifiedPosted 5 Feb 2026

About the role

Janux Therapeutics is seeking a Senior Research Associate to participate in designing and executing experiments, as well as perform sample analysis utilizing HPLC, CE-SDS, iCIEF, and capillary CE-SDS ELISA [simple western blot (Jess)]. These activities will support CMC, discovery, pre-clinical, and clinical development of existing and new lead candidates. This hands-on position requires effective communication and documentation of results to enable the advancement of novel research molecules toward development of clinical candidates, which will ultimately lead to late-stage development and commercialization. This position will directly support the discovery of next-generation immune oncology drugs. Ideal applicants will be agile and highly driven, collaborative, team-oriented, possess excellent communication and organizational skills, and carry a strong commitment to excellence.

ESSENTIAL FUNCTIONS AND RESPONSIBILITIES

  • Develop and perform HPLC and UPLC assays with minimal supervision including SEC, HIC, IEX, and RP.
  • Develop and perform iCIEF and CE-SDS assays.
  • Develop and perform ELISAs.
  • Perform DLS/SLS analysis using an UNcle instrument and generate datasets that will be used for formulation development studies.
  • Perform subvisible particulate matter analysis by HIAC.
  • Perform formulation development studies and execute clinical in-use stability studies, transfer formulation knowledge internally.
  • Design, conduct, analyze, interpret, and report laboratory experiments; summarize results for meetings and regulatory filings.
  • Write and manage SOP’s and test methods, train colleagues and facilitate method transfer to partners and CDMOs.
  • Manage and maintain required reagents, laboratory environment, and equipment needed to carry out assignments.
  • Draft development reports, method qualification protocols, and method qualification reports
  • Prepare presentations for team meetings.
  • Work closely with team leaders to complete highest priority work to reach goals and milestones.
  • Other duties as assigned.

REQUIRED SKILLS AND QUALIFICATIONS

  • Bachelor’s degree in related scientific discipline with 4-6 years of relevant industry experience or Master’s degree with 3-5 years of relevant industry experience required.
  • Strong benchtop skills, experience with analysis of protein biologics and peptides.
  • Proficient with the development of HPLC and UPLC assays; at least 3 years of experience is required. SEC, RP, HIC, and IEX experience is desired.
  • Experience developing and performing ELISAs.
  • Knowledge and familiarity in employing various analytical techniques, to include but not be limited to: CE-SDS, iCIEF.
  • Experience with DLS/SLS (UNcle), HIAC, HIC and CE-SDS ELISA (Simple Western) blotting or similar technology preferred.
  • Experience with formulation development with focus on antibodies or bispecifics is highly desired.
  • Proven experience with writing and maintaining SOPs, ability to train others and to transfer methods to external partners.
  • Ability to perform routine testing and to follow SOPs in a highly accurate and reproducible manner.
  • Desire and ability to learn new technologies, thinking outside the box, and exploring new approaches to innovate.
  • Training on project specific assays and ability to train others.
  • Ability to work independently, anticipate, and solve problems in a proactive fashion.
  • Excellent computer skills, proficiency with Microsoft Excel and PowerPoint required.
  • Strong oral and written communication skills a must.
Job Type: Full-time Benefits:·         Annual bonus program·         Incentive stock option plan·         401k plan with flat non-elective employer contribution ·         Comprehensive medical insurance with 90-100% employer-paid premiums ·         Dental and vision insurance·         HSA, FSA, and supplemental insurance plans (life, disability, accident, critical illness, hospital indemnity) ·         Unlimited PTO ·         Generous holiday schedule; includes summer and winter company shutdown ·         Relocation assistance Schedule:·         Monday to Friday Work authorization:·         United States (Required) Additional Compensation:·         Annual targeted bonus % 

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Company

Janux Therapeutics, Inc.

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