104 research scientist jobs at 39 companies in Menifee, CA
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Senior Research Scientist
Orange, California, United States
$85k-$90k/yr OnsiteFull Time
1+ YOEPh.D. in philosophy/psychology/neuroscience, 1+ year postdoctoral research, 5+ peer-reviewed publications, proficiency with MATLAB/JASP/R, EEG experience, strong writing and presentation skills.
MATLAB, JASP, R, EEG
2mo
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Research Scientist
Carlsbad, California, United States
OnsiteFull Time
3+ YOEPhD preferred; 3+ years in NLP/ML; Python or R; Spark/PySpark; strong communication.
Python, R, Spark, PySpark
1w
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Principal Research Scientist - Frontier Industrial AI
San Leandro or New York City or Massachusetts or Lake Forest or Philadelphia
$214k-$356k/yr HybridFull Time
PhD or equivalent research experience in a relevant field; original AI research, strong software development, experimental systems, independent project execution, and expertise in advanced machine learning areas.
Python
5d
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Principal Clinical Research Scientist
Jacksonville or Milpitas or Irvine
$117k-$201k/yr HybridFull Time
5+ YOEAdvanced scientific degree, 5+ years of ophthalmic clinical research experience, clinical program leadership, study design, technical writing, biostatistics knowledge, and cross-functional influence.
5d
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Principal Clinical Research Scientist
Jacksonville or Milpitas or Irvine
$117k-$201k/yr HybridFull Time
5+ YOEAdvanced scientific degree and 5+ years of ophthalmic clinical research experience required, with clinical study leadership, study design, technical writing, biostatistics knowledge, and cross-functional influence.
Clinical Study Reports (CSRs), Good Clinical Practice (GCP)
3mo
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Senior Research Scientist - Machine Leaning
Woburn or Boston or Arlington or Dayton or Melbourne or Carlsbad
$139k-$165k/yr OnsiteFull Time
3+ YOEBS+5 / MS+3 / PhD (or equivalent) in a scientific field; experience with PyTorch, JAX, or TensorFlow; Python and C/C++; scikit-learn, Pandas, Matplotlib; ability to obtain U.S. security clearance (U.S. citizenship).
PyTorch, JAX, TensorFlow, Python, scikit-learn, Pandas, Matplotlib, C, C++
2w
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Principal Clinical Scientist
Aliso Viejo, California, United States
$148k-$194k/yr OnsiteFull Time
5+ YOEMaster's degree in relevant science/medicine, 5+ years clinical research scientist experience, GCP knowledge, clinical protocol development, strong writing and communication, analytical skills.
PubMed, MedLine
5d
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Sr. Scientist/Sr. Scientist II - Pharmacology
Aliso Viejo or San Clemente or Burlington
$119k-$148k/yr OnsiteFull Time
4+ YOEPh.D. in a relevant life science discipline and 4+ years of industry experience; expertise in ocular pharmacology, study design, data interpretation, regulatory submissions, and cross-functional research collaboration.
CROs, in vitro, ex vivo, in vivo, IND, NDA, BLA
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Project Scientist Pool
Irvine, California, United States
$79k-$209k/yr OnsiteFull Time, Part Time
Ph.D. in physical climate, atmospheric chemistry, biogeochemistry or related field; proven research track record; submit CV, research statement, and references.
2w
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Applications Scientist
Carlsbad, California, United States
$87k-$112k/yr OnsiteFull Time
3+ YOEBachelor's in relevant life science, 3+ years life science research or technical support experience, mammalian cell culture and extracellular matrix experience, strong scientific communication and organizational skills.
1w
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Scientist - Plasma Fueling & Wall Conditioning
Foothill Ranch, California, United States
$115k-$140k/yr OnsiteFull Time
Ph.D. in physics or a related field required. Expertise in plasma research, fueling, wall conditioning, plasma-wall interactions, or particle transport; recent graduates welcome.
Microsoft Office Suite, Python, Matlab, IDL, high voltage power supplies, voltmeters, oscilloscopes, ionization gauges, pneumatics, high speed gas valves, cryogenics
2mo
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Scientist I
Irvine, California, United States
OnsiteFull Time
0+ YOEBachelor's in a scientific discipline, 0–2 years laboratory experience, knowledge of sterilization/disinfection, lab safety and regulatory standards (FDA, ISO), strong communication and problem-solving skills.
2mo
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Staff Scientist
Irvine, California, United States
$131k-$219k/yr OnsiteFull Time
5+ YOEBachelor's in a scientific discipline with 7+ years (or MS with 5+ years, PhD with 2+ years) in medical device/GxP-regulated industry; microbiology/fermentation experience, method development/validation, familiarity with QSR/FDA/ISO, statistical analysis (Minitab), and process improvement (Six Sigma/Lean).
Minitab, Six Sigma, Lean, DMADVV, DMAIIC
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Artificial Intelligence Scientist IV
Los Angeles or Irvine
$208k-$354k/yr OnsiteFull Time
10+ YOEMS in CS/AI/ML required (PhD preferred), 10+ years relevant experience, expertise in LLMs, generative and agentic AI (RAG, PEFT, instruction fine-tuning, prompt engineering), transformers and deep learning, publication record, ability to collaborate with engineering and mentor scientists.
Deep Neural Networks, Large Language Models (LLMs), RAG, Transformers, Agentic AI
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Scientist (Mass Spectrometry)
San Juan Capistrano, California, United States
$85k-$110k/yr OnsiteFull Time
BS in biology/chemistry required; 5-7 years HPLC and LC-MS/MS experience (reduced with advanced degree); ability to design, validate assays and prepare technical documentation.
HPLC, LC-MS/MS
5d
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R&D Scientist
Carlsbad, California, United States
$102k-$132k/yr OnsiteFull Time
2+ YOEMaster’s degree in chemistry, materials science, or related science; 2+ years of multistep synthesis laboratory experience; organosilicon chemistry, analytical, safety, data analysis, and English communication skills.
NMR, GC, GC-MS, TGA/DSC, GC-TCD/FID, Schlenk techniques, glovebox, SOPs, DoE
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Principal Scientist- Search
New York City or San Francisco or Los Angeles or Irvine or McLean or Washington
$212k-$394k/yr HybridFull Time
8+ YOEPhD and 8+ years building and deploying production AI systems; deep expertise in information retrieval, search, NLP, RAG, knowledge graphs, LLMs; strong product sense and leadership skills.
Python, PyTorch, Hugging Face, Azure ML, Azure AI Foundry, AWS SageMaker
3w
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Scientist, Analytical Development
Tustin, California, United States
$110k-$137k/yr OnsiteFull Time
8+ YOEBS in biochemistry/chemistry/biology required, 8+ years analytical/QC biotech experience, method development and validation experience with HPLC/CE/ELISA, GMP and report/procedure writing, supervisory experience.
ELISA, HPLC, CE, SDS-PAGE, Maurice
3mo
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SCIENTIST I
Irvine, California, United States
$28-$34/hr OnsiteFull Time
Bachelor’s in Chemistry; chromatography and spectroscopy knowledge; HPLC/GC/UV-Vis experience preferred; strong English communication; cGMP/FDA awareness.
HPLC, GC, FTIR, UV-Vis, ICP, XRD, Malvern Particle Analysis
1mo
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Innovation Scientist
Orange, California, United States
$115k-$130k/yr OnsiteFull Time
5+ YOEBS in a relevant science, 5+ years R&D/manufacturing experience in dietary supplements, formulation and prototyping experience, strong scientific storytelling, cross-functional collaboration, and customer-facing technical support.
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