31 principle developer jobs at 26 companies in Cotati, CA
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Principle Software Engineer - Ads
San Francisco, California, United States
$269k-$395k/yr OnsiteFull Time
12+ YOE12+ years in distributed systems; leadership of large-scale platform initiatives; hands-on architecture decisions; ads infrastructure experience preferred.
Distributed systems, Real-time serving infrastructure, Data pipelines, Low latency systems
2mo
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Principle Software Engineer, AI Observability & Evals Platform
Boston or San Francisco or New York City
$230k-$270k/yr OnsiteFull Time
10+ YOE10+ years backend or full-stack engineering; strong Python/Go; TypeScript/React; architectural decisions; reliable, scalable systems; mentoring.
Python, Go, TypeScript, React
12h
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Senior iOS Developer
Iași or Porto or Aveiro or Coimbra or Leicester or San Diego or San Francisco or Chennai or Bengaluru or Blumenau or Cluj-Napoca or Valencia or Casablanca
HybridFull Time
8+ YOERequires 8+ years of mobile development experience, Swift, iOS application development, testing, FRP, MVVM architecture, SOLID principles, and Agile methodologies; KMP and GraphQL are a plus.
Swift, ReactiveCocoa, RxSwift, KMP, GraphQL, Scrum, Kanban
1mo
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Sr Lead Software Engineer - CAFE
Houston or San Francisco or Seattle
$171k-$260k/yr OnsiteFull Time
5+ YOE5+ years software engineering experience with formal training; expertise in system design, application development, cloud-native principles, Ansible, Windows/Linux, SCCM, PowerShell, and enterprise automation; experience with AI-assisted development tools and technical leadership.
Ansible, Microsoft Windows, Linux, Microsoft System Center Configuration Manager (SCCM), Microsoft PowerShell, GitHub, AWS, Azure
2mo
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Senior R&D Engineer
San Francisco, California, United States
OnsiteFull Time
Deep knowledge in applied physics, optical engineering, or physical chemistry; ECAD and MCAD proficiency (Altium and SolidWorks); prototype-driven, first-principles problem solving; spectroscopy experience preferred.
Altium, Solidworks
2w
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Founding Engineer
San Francisco, California, United States
OnsiteFull Time
Experienced engineer with strong systems judgment, customer obsession, first-principles thinking, AI-native engineering, end-to-end ownership, and ability to build reliable backend and workflow systems.
Python, FastAPI, SQLAlchemy, PostgreSQL, Celery, React, TypeScript, Tailwind, Vite, Anthropic, OpenAI, AWS, ECS, RDS, S3, Lambda
2mo
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Mechanical Engineer, Surgery & Robotics
Austin or South San Francisco
$83k-$224k/yr OnsiteFull Time
3+ YOE3+ years mechanical engineering experience; strong first principles; BS in science or engineering or equivalent experience.
CAD, CAE, FEM, Matlab, Python
2w
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Staff Radar Systems Development Engineer
El Segundo or Hawthorne or Los Angeles or Washington or San Francisco or Seattle or London
$110k-$240k/yr OnsiteFull Time
10+ YOEBachelor's in STEM or equivalent,10+ years radar systems experience,expertise in radar principles,signal processing,DSP,RF systems,algorithm development,data analysis;proficiency with Python/MATLAB;ability to lead tests and mentor engineers.
C++, Python, MATLAB, FPGAs, DSPs
9h
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Mechanical Engineer
Berkeley, California, United States
$90k-$140k/yr OnsiteFull Time
Mechanical or electromechanical hardware design and analysis, CAD proficiency with Onshape, hands-on fabrication, first-principles engineering, prototyping, and a bachelor's degree or higher in mechanical engineering or a related field.
Onshape, C++, Python, FEA, CAD, PCB
4w
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New Product Introduction (NPI) Manufacturing Engineer
Santa Rosa, California, United States
$93k-$155k/yr OnsiteFull Time
Bachelor's/Masters/PhD in engineering, materials or sciences; ability to develop business and technical strategies; lead cross-functional teams; expertise in precision fabrication and manufacturing principles; familiarity with RF/microwave/mmWave; strong communication and organizational skills.
1mo
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Assistant Engineer
Oakland, California, United States
$32-$42/hr OnsiteFull Time
0+ YOEBachelor's degree in civil engineering, 0–4 years experience, E.I.T. certification required or able to obtain within 6 months, proficiency with AutoCAD, Civil3D, and Microsoft Office, and knowledge of civil engineering principles.
AutoCAD, Civil3D, Microsoft Office Suite
2mo
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Founding Engineer: Agent Infrastructure
San Francisco, California, United States
OnsiteFull Time
1+ YOE1+ years professional experience shipping to production; strong ownership, first-principles thinking, building production-grade infrastructure (APIs, LLM workflows, scraping, knowledge graphs), cloud and Linux experience.
LLM, Linux, APIs, knowledge graph
3w
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Associate Electrical Engineer
Alameda, California, United States
$83k-$105k/yr OnsiteFull Time
Bachelor's in Electrical Engineering or Robotics,0–2 years experience, hands-on PCB and lab experience, familiarity with motor control and safety principles, Linux and C/C++ skills.
Altium, KiCad, Eagle, Linux, C/C++, oscilloscope, power supply, multimeter
1w
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Senior Site Reliability Engineer, Production Engineer - ThousandEyes
San Francisco or Seattle or Austin or New York City
$165k-$241k/yr HybridFull Time
5+ YOE5+ years experience; proficiency in Python or Go; expertise with Kubernetes, cloud (AWS), Unix/Linux; strong SRE principles, incident response, and security-minded engineering.
Python, Go, Kubernetes, Service Mesh, Prometheus, OpenTelemetry, ArgoCD, CNCF, AWS, Unix, Linux
3w
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Staff Mechanical Engineer, Hydrogen System
Berkeley, California, United States
$129k-$169k/yr OnsiteFull Time
8+ YOEBachelor's in Mechanical Engineering and 8+ years mechanical design experience in fluid systems, prototyping, manufacturing, vendor engagement, safety, and first-principles fluids modeling.
3w
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Senior Site Reliability Engineer
San Francisco, California, United States
$149k-$224k/yr HybridFull Time
5+ YOE5+ years systems and software engineering experience for large-scale internet services; expertise in SRE principles, containers, observability, incident management, Python and Go, and applying AI/ML to operations.
Temporal, Airflow, Argo Workflows, Docker, Kubernetes, DNS, HTTP, Grafana, Prometheus, ELK, Splunk, Datadog, Python, Go, Linux, Claude Code, GitHub Copilot, Codex, Cursor, AWS, GCP, MCP
1mo
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Strategy and Business Development Team Member
San Francisco or New York City or Denver or Austin or Calgary or Toronto or United States
$119k-$138k/yr RemoteFull Time
Bachelor's in a quantitative field preferred; experience developing first-principles engineering/techno-economic models; proficiency in Python or similar; strong analytical and communication skills.
Python, Julia, MATLAB, R
1mo
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Retail - Associate Boutique Manager, Boutique Management (Broadway Plaza)
Walnut Creek, California, United States
$36-$40/hr OnsiteFull Time
Lead and develop retail teams to achieve sales and service goals, manage day-to-day store operations, build client relationships, and champion company leadership and people-development principles.
2mo
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Senior Manager, Imaging Machine Learning
South San Francisco, California, United States
$247k-$262k/yr HybridFull Time
3+ MgmtExperience in computer vision/ML on cellular imaging, imaging principles, hands-on cellular imaging datasets, and 3+ years people management; ability to collaborate with lab and engineering teams and set strategic roadmaps.
VLMs, perturb-seq, agentic frameworks
1mo
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Senior Human Factors Researcher
San Francisco or Helsinki
HybridFull Time
5+ YOEMaster's or PhD in a related field, 5+ years human factors research on physical hardware/wearables, experience with 3D anthropometric data, ergonomic principles, experimental design, and analysis using Python, R, or MATLAB.
Python, R, MATLAB, Rhino, Grasshopper, CAD, 3D printing
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