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373 junior python jobs at 157 companies in Fontana, CA

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Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
Help us #BeatIndeed & #BeatLinkedIn
1mo
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Junior Consultant - US
New York City or Los Angeles or United States or North America
$85k-$95k/yr OnsiteFull Time
Artefact
Artefact: Global consulting firm specialized in data and AI transformation.
1+ YOEUndergraduate degree, 1-2 years relevant experience, strong Excel and PowerPoint skills, familiarity with SQL/R/Python, excellent communication and analytical skills for client-facing work.
Microsoft Excel, SQL, R, Python, Microsoft PowerPoint
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1mo
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JUNIOR SOFTWARE DEVELOPER (C++)
Norco, California, United States
$75k-$110k/yr OnsiteFull Time
VSolvit
VSolvit: Providing technology services and data solutions for government agencies.
0+ YOE0–4 years software development experience; proficiency in C++ for desktop applications; familiarity with OOP, multithreading, Git, CMake, and Python; U.S. Citizenship and active Secret DoD clearance required; CompTIA Security+ required.
C++, Git, CMake, Python, Jira, Confluence, SAFe, Agile
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2w
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Software Engineer - Test (Entry-Junior)
Los Angeles or San Francisco
$90k-$161k/yr OnsiteFull Time
Revel
Revel: Modern software platform for controlling complex hardware systems.
0+ YOEBachelor's degree in engineering/physics/computer science,0–2 years' software experience,foundational Python,interest in CI/CD,embedded testing and Linux familiarity,ability to work on hardware-in-the-loop systems,ITAR-eligible status required.
Python, Rust, Linux
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4d
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Junior Cybersecurity Administrator
Riverside, California, United States
$30-$45/hr OnsiteFull Time
T.M. Cobb
T.M. Cobb: Manufactures and distributes premium wood doors and building products.
0+ YOECompTIA Security+ (required or within 12 months), associate or bachelor\u0002s in related field or equivalent experience, 0-2 years IT/cybersecurity experience, familiarity with Rapid7, CrowdStrike, Proofpoint, Microsoft 365 Defender, basic scripting, strong communication and documentation skills.
Rapid7, InsightVM, InsightIDR, CrowdStrike Falcon, Proofpoint Essentials, Microsoft 365 Defender, PowerShell, Python
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1mo
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AI & Machine Learning Summer/Fall Co-Op (June '26 - Dec '26) (Irvine, CA, US)
Irvine, California, United States
$26-$48/hr OnsiteInternship
Skyworks Solutions
Skyworks SolutionsNASDAQ: SWKS: Designs and manufactures analog and mixed-signal semiconductor solutions.
0+ YOEUndergrad (junior/senior) in CS, data science, EE, ME, or IE; willing to relocate onsite June–Dec 2026; Python and PyTorch; VSCode; familiarity with Agentic AI, LangChain, LangGraph, Genie, Databricks.
Python, PyTorch, VSCode, Agentic AI, LangChain, LangGraph, Genie, Databricks
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2mo
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Power Engineer
Irvine, California, United States
$65k-$108k/yr HybridMultiple Commitments Available
ETAP
ETAP: Electrical power system modeling and analysis software solutions.
Bachelor’s degree in Electrical Engineering; power systems knowledge; software troubleshooting; Windows OS; SQL/SQLite; Python; strong communication.
Windows, SQL Server CE, SQLite, Python, SQL, Microsoft Office
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2w
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Postdoctoral Scholar - Research Associate
Los Angeles, California, United States
$64k-$66k/yr OnsiteFull Time
University of Southern California
University of Southern California: Private research university providing higher education and healthcare services.
0+ YOEPh.D. in a related field, programming expertise (Python, Matlab, TensorFlow), experience with neuroimage analysis, strong interest in neurodegenerative disease and neurogenomics.
Python, Matlab, TensorFlow
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2mo
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Software Engineering Intern, Data & Machine Learning
Glendale, California, United States
$25-$35/hr HybridInternship, Temporary
Moon
Moon: Building an AI-powered SaaS platform for business operations.
0+ YOESolid Python, data manipulation (pandas/polars), SQL, experience building data pipelines and tests.
Python, Pandas, Polars, SQL, Airflow, Prefect, dbt, LangChain, OpenAI API, Azure, AWS, GCP, FastAPI
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2mo
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AI Engineer
New York or Los Angeles or Boston or Jersey City or Houston
$115k-$130k/yr RemoteAll Commitments Available
Makai Labs
Makai Labs: Provides AI-powered enterprise automation and human-machine teaming solutions.
Hands-on AI engineer with Python skills; experience building AI apps; internship/coursework/research or projects; ability to prototype and iterate quickly.
Python, API development, Backend services, Workflow automation, FastAPI/Flask, React/TypeScript, Docker, Testing (Python/TypeScript), LLM retrieval/search
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2w
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Software Engineer I
Los Angeles, California, United States
$91k-$111k/yr HybridFull Time
Los Angeles Capital Management
Los Angeles Capital Management: Quantitative equity management for global institutional investors.
1+ YOEBachelor's in a quantitative field, 1+ year production software experience, strong Python and SQL skills, familiarity with testing and Git, and effective communication.
Python, FastAPI, Pydantic, GitHub Actions, Snowflake, Prefect, Git, SQL, Azure, Docker, Dagster, Airflow
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1w
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Software Engineer
Los Angeles, California, United States
OnsiteFull Time
ALKEME Insurance
ALKEME Insurance: Insurance brokerage and risk management services provider.
Bachelor's degree or equivalent experience; proficiency in Java, Python, C#, or JavaScript; experience with Agile and Git; strong problem-solving and communication skills.
Java, Python, C#, JavaScript, Agile, Git, AWS, Microsoft Azure, Google Cloud
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2mo
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Scientist - Plasma Diagnostics
Foothill Ranch, California, United States
$110k-$130k/yr OnsiteFull Time
TAE Technologies
TAE Technologies: Developing commercial fusion energy and advanced power management technologies.
PhD in plasma physics with in situ diagnostics; hands-on diagnostics experience; data analysis and reporting; programming in Python.
Langmuir probes, retarding field analyzers, fast ion loss detectors, pyrobolometers, thermo-optical arrays, DAQ systems, oscilloscopes, function generators, high-vacuum systems, Python
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3mo
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WiFi Connectivity Validation Engineer
Irvine or San Diego or Sunnyvale
OnsiteFull Time
Apple
AppleNASDAQ: AAPL: Designs and sells consumer electronics, software, and online services.
Bachelor's degree; knowledge of IEEE 802.11; programming in Python, Shell/Perl/JS/C#; experience validating WiFi systems; preferred advanced degree.
Python, Shell, Perl, JavaScript, CSharp, WiFi test equipment, Wireshark, Iperf, CMW500
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1w
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Development and Operations Engineer I
Costa Mesa, California, United States
$102k-$126k/yr RemoteFull Time
Experian
ExperianLondon Stock Exchange: EXPN: Provides data and analytical tools to manage credit risk.
1+ YOE1+ year experience in DevOps/CI-CD, AWS (EC2,S3,Dynamo), Python with Boto3, Terraform and CloudFormation; Bachelor's in related field accepted.
GitHub Actions, Harness IO, AWS CodeBuild, AWS CodePipeline, GitHub, Artifactory, EC2, S3, Dynamo, Python, Boto3, Terraform, CloudFormation
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2mo
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Postdoctoral Scholar – Clinical Neuroscience Research
Irvine, California, United States
$69k-$83k/yr OnsiteFull Time
University of California
University of California: A public research university system providing education and healthcare.
Recent PhD (within 3 years) in relevant field, proficiency in R and/or Python, strong written/oral communication, experience with biostatistics/data science preferred.
R, Python
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2mo
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Software Development Engineer in Test II (SDET) – ArcGIS Enterprise
Redlands, California, United States
$101k-$167k/yr OnsiteFull Time
Esri
Esri: Developing software for digital mapping and spatial data analysis.
2+ YOE2+ years in a similar role; proficiency in Java, C++, C#, or Python; experience with test automation frameworks; knowledge of CI tools; bachelor's in a related field.
Java, Python, C++, C#, Selenium WebDriver, Appium, JUnit, PyUnit, Jenkins, Chef
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1mo
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Analyst, Pharmacy Data & Analytics
Long Beach or United States
$49k-$107k/yr RemoteFull Time
Molina Healthcare
Molina HealthcareNYSE: MOH: Provides managed health insurance through government-sponsored benefit programs.
1+ YOEAssociate's degree (or equivalent); 1-3 years healthcare experience; SQL with Azure Databricks, Python, and Microsoft Excel proficiency; pharmacy data knowledge preferred.
SQL, Azure Databricks, Python, Microsoft Excel
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6d
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Student Researcher, PhD, Fall 2026
Mountain View or Ann Arbor or Atlanta or Austin or Cambridge or Chicago or Irvine or Kirkland or Los Angeles or Madison or New York or Palo Alto or Pittsburgh or Goleta or San Bruno or Seattle or San Francisco or Sunnyvale or Washington D.C.
$118k-$157k/yr OnsiteInternship
Google
GoogleNASDAQ: GOOGL: Provides online search, advertising, cloud computing, and consumer electronics.
PhD student in CS or related field, research experience, proficiency in English and programming (e.g., Python, Java, JavaScript, C/C++); submit CV and transcript.
Python, Java, JavaScript, C, C++
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2w
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Software Development Engineer (Firmware)
Irvine, California, United States
$98k-$131k/yr OnsiteFull Time
Western Digital
Western DigitalNASDAQ: WDC: Design and manufacture data storage devices and systems.
Embedded firmware development using C/C++, Python familiarity, embedded systems fundamentals, and interest in ARM/microcontroller platforms. Right to work in the US required.
C, C++, Python, ARM, Raspberry Pi, Arduino
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1mo
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Aerodynamics Engineer I
Long Beach, California, United States
$90k-$125k/yr OnsiteFull Time
Relativity Space
Relativity Space: Designing and manufacturing 3D-printed rockets and launch vehicles.
Undergraduate engineering degree, proficiency in compressible flow and CFD, experience with Python or MATLAB and HPC, exposure to FUN3D/Star-CCM+, strong collaboration and documentation skills.
CFD, HPC, Python, Matlab, FUN3D, Star-CCM+
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