85 principal researcher jobs at 27 companies in Bothell, WA
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Principal AI Researcher
Pleasanton or Atlanta or Seattle
$228k-$342k/yr HybridFull Time
8+ YOE8+ years AI/ML research; PhD or Master’s in CS/AI/Math/Physics; 4+ years DL frameworks; 2+ years LLMs/VLMs; strong publication or production impact.
PyTorch, JAX, TensorFlow
1w
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Principal Security Researcher
Redmond, Washington, United States
$143k-$275k/yr RemoteFull Time
4+ YOEMaster's+4 years or Bachelor's+6 years (or equivalent) in computing/security; hands-on vulnerability research, fuzzing, exploitability assessment, and tool development experience.
SARIF, C, C++, C#, Java, JavaScript, TypeScript, Python, large language models
2mo
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Principal Applied Researcher
San Jose or Seattle
$206k-$388k/yr OnsiteFull Time
Masters or PhD preferred in CS or related fields; strong programming and proficiency with PyTorch, TensorFlow, or JAX; experience with transformers, diffusion/GANs, cloud/MLOps, production ML deployment, and reading/prototyping research.
PyTorch, TensorFlow, JAX, Horizon AI Stack
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Principal User Researcher, Senior Talent & Transformation: Design
Seattle, Washington, United States
$181k-$245k/yr OnsiteFull Time
10+ YOE10+ years UX research with executive leadership; strong research methods; advanced degree in Data Science, HCI, or related field; ability to influence senior partners.
UX research, ethnography, contextual inquiry, surveys, statistical analysis
1w
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Principal AI Security Researcher (200046441)
Redmond, Washington, United States
OnsiteFull Time
Perform AI security research and related responsibilities as defined by the requisition.
2mo
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Principal Scientist - Cell Therapy Translational Research
Seattle, Washington, United States
$152k-$185k/yr OnsiteFull Time
8+ YOELead translational research in cell therapy; develop biomarker strategies; manage CROs and collaborators; strong communication.
Flow cytometry, Transcriptomics, Proteomics, Biomarker assays, Clinical data analysis
1w
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Senior Principal Geologist
Redmond or Portland
$126k-$175k/yr OnsiteFull Time
12+ YOEB.S. in geology or related field, 12+ years environmental consulting experience, licensed LHG or PG, expertise with MTCA/CERCLA/RCRA, strong technical writing and client management skills.
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Associate Principal - Data Sciences
Seattle, Washington, United States
$105k-$173k/yr OnsiteFull Time
12+ YOE12–18 years of experience designing GenAI multimodal pipelines, prompt engineering, LLM inference, Python programming, JSON generation, data pipelines, and AWS services including Bedrock, Lambda, S3, and Kinesis.
AI, Generative AI, AWS Bedrock, Claude, Nova, Amazon Bedrock, AWS Lambda, Amazon S3, Amazon Kinesis, Python, JSON
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Principal Scientist - Cell Therapy Translational Research
Seattle, Washington, United States
$152k-$185k/yr OnsiteFull Time
4+ YOEAdvanced degree in life sciences (BS/MS/PhD) with 4–8+ years industry or academic experience; expertise in immunology/cell therapy, biomarker assays (flow cytometry, transcriptomics, proteomics), data analysis, translational strategy, CRO oversight, and regulatory writing.
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Principal Experimental Scientist - RF
Everett, Washington, United States
$230k-$270k/yr OnsiteFull Time
10+ YOEPhD in physics, plasma physics, electrical engineering, or related field; 10+ years in lab/R&D with plasma systems; expertise in RF plasma sources and diagnostics.
RF hardware, Antenna design, Vacuum systems, Plasma diagnostics, RF-plasma interactions
1mo
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Archaeologist Principal Investigator /Field Director
Portland or Seattle or Eugene or Medford or Bend
$75k-$105k/bi-wk FieldFull Time
5+ YOE5+ MgmtMaster's in archaeology/anthropology, RPA, ability to hold state archaeology permits, 5+ years supervisory cultural resources experience, MS Office proficiency, valid driver's license, ability to pass drug/alcohol tests.
Microsoft Office
2mo
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Principal Technical Consultant, Archaeologist - Oregon or Washington
Seattle or Portland
$106k-$145k/yr HybridFull Time
ERM: Global consultancy providing environmental, health, safety, and sustainability services.
10+ YOESenior archaeologist with 10+ years experience; PI eligibility in PNW; RPA; travel; strong NEPA/SEPA knowledge.
GPS, ArcGIS Field Maps, Survey123, Total Station
1w
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Principal AI/ML Research Engineer
United States or California or San Jose or Seattle or Portland or Boston or Chicago
$250k-$289k/yr RemoteFull Time
12+ YOE12+ years in software or ML engineering, including 5+ years in applied AI/ML research. Requires advanced expertise in model architecture, algorithms, Python, deep learning frameworks, distributed AI, cloud, and ML platforms.
Python, PyTorch, TensorFlow, JAX, C++, Java, Ray, DeepSpeed, Megatron, Spark, AWS, Azure, SageMaker, MLflow, Databricks, LanceDB, Pinecone, Qdrant, Milvus, Transformer, Tabular Transformers, LLMs, RAG, LoRA, PEFT, Diffusion, Reinforcement Learning, RLHF, NeurIPS, ICML, KDD, ACL
1d
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Principal Applied Scientist- AI
Bellevue, Washington, United States
$218k-$265k/yr OnsiteFull Time
Deep expertise in frontier AI, large language or multimodal models, production ML systems, Python, PyTorch, distributed training, and end-to-end research-to-production deployment; PhD or equivalent experience preferred.
Python, PyTorch, JAX, CUDA, vLLM, Ray, DeepSpeed, FSDP, Triton, LangGraph, Semantic Kernel, MCP, Kubernetes, Azure AI, Hugging Face, RAG, DPO, PPO, GRPO, RLHF
3w
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Principal, Quality Assurance
Bothell, Washington, United States
$150k-$185k/yr OnsiteFull Time
5+ YOEExperience in cGMP clinical manufacturing, electronic quality management systems, process validation for plasmid/LVV preferred, 5+ years in Quality Assurance, regulatory submission and inspection readiness experience.
1mo
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Principal Scientist, Immunology
San Francisco or Seattle
$175k-$190k/yr RemoteFull Time
8+ YOEPhD in immunology or related field with 8+ years industry experience; deep immunology expertise, drug development knowledge, experience with immunological assays (flow cytometry, ELISA/MSD), strong communication and publication record.
flow cytometry, ELISA/MSD, cytokine panels, cellular assays, single-cell, proteomics
4w
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AI Engineer - Principal
Bellevue, Washington, United States
$154k-$278k/yr HybridFull Time
Experience designing and implementing AI-driven automation with Siemens CAD/CAM tools, LLM-based workflows, and integrating AI into engineering software; ability to interface with customers and lead technical teams.
Siemens CAD/CAM tools, LLM
2mo
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Senior/Principal Fisheries Scientist
Wenatchee or Seattle or Portland or Washington or Oregon or Idaho or California or Montana
$110k-$145k/yr RemoteFull Time
10+ YOEBachelor's in fisheries science/biology/ecology required (Masters/Doctorate preferred); 10+ years experience in Pacific Northwest salmonid issues; expertise in fish passage, ESA consultation, hatchery operations, study design, quantitative analysis, project management, and staff supervision; valid driver’s license.
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Principal Research Scientist, Siri Innovation Studio
Seattle, Washington, United States
OnsiteFull Time
Expertise in machine learning modeling, incubating and deploying ML-driven features, collaborating across software/hardware/design teams, and building user-centered AI for assistants and speech products.
iOS, iPadOS, macOS, watchOS, visionOS
3w
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Principal UI/UX Designer
San Francisco or Seattle or Bellevue
$197k-$314k/yr HybridFull Time
10+ YOE10+ years designing enterprise products, deep knowledge of design systems, AI/product design, user research, and mentorship. Portfolio and samples required.
Figma, Figma Make, Claude, Cursor, Salesforce Design System (SLDS2)
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