Immune System Key Ltd logo
Immune System Key Ltd · Life sciences

Senior Scientist, Bioassay

Immune System Key Ltd Posted Sep 15, 2026
Salary · per posting
$90k – $140k/yr
Workplace
On-site / per employer
Posted
Sep 15, 2026

About this role

Thanks for visiting our Career Page. Please review our open positions and apply to the positions that match your qualifications.Senior Scientist, BioassayBothell, WAFull TimeImmuno-OncologyMid LevelShareSystImmune is a leading and well-funded clinical-stage biopharmaceutical company located in Bothell, WA and Princeton, NJ. It specializes in developing innovative cancer treatments using its established drug development platforms, focusing on bi-specific, multi-specific antibodies, and antibody-drug conjugates (ADCs).

SystImmune has multiple assets in various stages of clinical trials for solid tumor and hematologic indications. Alongside ongoing clinical trials. SystImmune has a robust preclinical pipeline of potential cancer therapeutics in the discover and IND-enabling stages, representing cutting-edge biologics development.

We offer an opportunity for you to learn and grow while making significant contributions to the company's success.This is a hands-on laboratory role within the Immuno-Oncology Bioassay Team. TheSenior Scientistwill design, develop, execute, and automate high-throughput bioanalytical and functional assays to support the discovery and preclinical characterization of immuno-oncology antibody therapeutics, including bispecifics, multi-specific antibodies, and ADCs. This position requires daily bench work in a BSL-2 environment and close collaboration with cross-functional teams across discovery, translational science, and IND-enabling studies.This position is full-time onsite position in Bothell, WA.ResponsibilitiesDesign, establish, and execute mechanism-driven in vitro preclinical bioassays (including ex vivo and human translational systems) to identify, characterize, and advance novel immuno-oncology antibody therapeuticPerform routine assay runs, troubleshoot and resolve assay performance issues, and maintain assay documentation and SOPs.Oversee sample management, method quality control, and inter-site harmonization through systems like LIMS.Prepare written reports, assay summaries, and oral presentations for internal review, cross-functional meetings, and support regulatory submissions.Mentor junior team members and contribute to assay platform standardization, automation across the expanded Bioassay Team.Support IND-enabling studies, GLP transitions, and regulatory audits as assigned.Other duties as assignedQualificationsPhD in immunology, cancer biology or related field with 2-5+ years of relevant academic and/or pharmaceutical or biotech experience.Hands-on experience in the discovery and development of protein therapeutics, with a focus on functional bioassays and mammalian cell culture.Background in human immune cell biology, immune checkpoint signaling, or T-cell/B-cell receptor signaling research.Direct experience developing and running bioassays for bispecific antibodies, multi-specific formats, or ADCs is strongly preferred.Proficiency in high-dimensional data analysis and visualization (e.g., flow cytometry, multiplex assays) using tools such as R or Python.Experience in assay automation is a plus.Excellent time management, organizational skills, and written/oral communication abilities.Possess the right attitude (agile, curious, positive, open-minded, “can-do” mindset), and have the ability and strong desire to “make things happen”Work EnvironmentBench top work in a BSL-2 laboratory environment, including potential exposure to biohazardsAdherence to Health and Safety standards when working with temperature-controlled systems, including liquid and vapor phase liquid nitrogenPhysical DemandsOccasional lifting to 30 poundsRequires repetitive multi-channel pipetting, single channel pipetting, and computer data entryFine motor movements in fingers/hands to operate computers and other office and lab equipment, repetitive motion with lab equipmentStooping, bending, crouching, reaching, or climbing laddersPosition Type/Expected Hours of WorkMay need to work outside of standard working hours at timesThis role is currently working onsite and is expected to work onsite for working hours, with flexibility to work start time.TravelAttendance and participation in national and international conferences encouragedCompensation and Benefits:The expected base salary range for this position is $90,000 - $140,000 annually.

Actual compensation will be based on a variety of factors, including but not limited to a candidate’s level qualifications, experience, and skills.While most offers typically fall within thelow to mid-pointof the range, we may extend an offer toward the higher end for exceptional candidates whose background and expertise exceeds the requirements of the role.SystImmune is a leading and well-funded biotech company with a bright future. We offer an opportunity for you to learn and grow while making significant contributions to the company’s success. SystImmune offers a comprehensive benefits package including: 100% paid employee premiums for medical/dental/vision, also STD, LTD, a 401(k) plan with a 50% company match of up to 3% and a vesting schedule of only 5 years, 15 PTO days per year, sick leave, plus 11 paid holidays and MORE.We offer an opportunity for you to learn and grow while making significant contributions to the company’s success.SystImmune is an Equal Opportunity Employer.

We welcome diverse talent and encourage all qualified applicants to apply.ShareApplyApply for this positionRequiredFirst NameLast NameEmail AddressPhoneAddressResumeWe've received your resume. Clickhereto update it.Attach resumeorPaste resumeAttach resume as .pdf, .doc, .docx, .odt, .txt, or .rtf (limit 5MB) orPaste resumePaste your resume here orAttach resume fileCover LetterWho referred you to this position? Enter their first and last name here.Are you willing to relocate?No answerYesNoWhat's your citizenship / employment eligibility?No answerI am a U.S.

Citizen/Permanent ResidentNon-citizen allowed to work for any employerNon-citizen allowed to work for current employerNon-citizen seeking work authorizationI am a Canadian Citizen/Permanent ResidentOtherWhat's your highest level of education completed?No answerGED or EquivalentHigh SchoolSome CollegeCollege - AssociatesCollege - Bachelor of ArtsCollege - Bachelor of Fine ArtsCollege - Bachelor of ScienceCollege - Master of ArtsCollege - Master of ScienceCollege - Master of Fine ArtsCollege - Master of Business AdministrationCollege - DoctorateMedical DoctorOtherCollege or UniversityAre you 18 years of age or older?No answerYesNoLinkedIn Profile URL:What languages do you speak fluently?Desired salaryEarliest start date?Can you work weekends?No answerYesNoCan you work evenings?No answerYesNoCan you work overtime?No answerYesNoIn 150 characters or fewer, tell us what makes you unique. Try to be creative and say something that will catch our eye!150Can you work full-time onsite for position?*YesNoThe following questions are entirely optional.To comply with government Equal Employment Opportunity and/or Affirmative Action reporting regulations, we are requesting (but NOT requiring) that you enter this personal data. This information will not be used in connection with any employment decisions, and will be used solely as permitted by state and federal law.

Your voluntary cooperation would be appreciated.Learn more.GenderDecline to answerFemaleMaleRace/EthnicityDecline to answerHispanic or LatinoWhite, not Hispanic or LatinoBlack or African-American, not Hispanic or LatinoAsian, not Hispanic or LatinoNative Hawaiian or Other Pacific Islander, not Hispanic or LatinoAmerican Indian or Alaskan Native, not Hispanic or LatinoTwo or More Races, not Hispanic or LatinoMENA (Middle Eastern and North African)Human Check*Submit Application

Originally posted by Immune System Key Ltd. View original posting