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Junior Python Developer Jobs in Castaic, CA, US
120+ junior python developer jobs from 59 companies hiring in Castaic, CA, US.
2d
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Junior Gen AI Developer
El Segundo, California, United States
$83k-$90k/yr OnsiteFull Time
0+ YOEBachelor's degree in Computer Science, Software Engineering, Artificial Intelligence, or related technical discipline; experience with Python for AI/ML; knowledge of LLMs and AI concepts; ability to obtain Secret clearance; on-site, California location.
Python, LangChain, LlamaIndex, Semantic Kernel, Azure, Git
2w
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Junior Electromechanical Controls Engineer
El Segundo, California, United States
$70k-$105k/yr OnsiteFull Time
1+ YOEBachelor's degree in Electrical, Mechanical, or Aerospace Engineering; 1+ years experience; proficiency in MATLAB/Simulink, dSPACE, LabVIEW, SolidWorks, C/C++, Python; on-site in El Segundo, CA; ability to obtain Top Secret clearance; US citizenship.
MATLAB/Simulink, dSPACE, LabVIEW, SolidWorks, C/C++, Python
1mo
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Mission Software (Python) Internship - Fall 2026
El Segundo, California, United States
$37/hr OnsiteInternship
0+ YOEProficiency in Python; strong CS fundamentals; ability to debug; comfortable with Linux; must be enrolled in undergrad/graduate program.
Python, Linux
2mo
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Cybersecurity Engineer, Junior
El Segundo, California, United States
$53k-$108k/yr HybridFull Time
Experience with C, C++, PowerShell, Python; knowledge of computer systems, information security software/hardware, networks; ability to obtain a Secret clearance; bachelor's degree by Spring/Summer 2026.
C, C++, PowerShell, Python, Cloud, Networking, Firewalls, Routers, Switches, Information Security Software
2mo
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Cybersecurity Engineer, Junior
El Segundo, California, United States
$53k-$108k/yr OnsiteFull Time
Experience with programming (C, C++, PowerShell, Python); knowledge of computer systems, information security software/hardware, networks; understanding of information security principles; ability to analyze complex IT systems; effective communication with various stakeholders; ability to obtain Secret clearance; bachelor's degree expected by Sprin...
C, C++, PowerShell, Python
2mo
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Software Engineer Intern
Los Angeles, California, United States
OnsiteFull Time
Pursuing a bachelor’s in CS/Software Engineering; strong CS fundamentals; proficiency in Python, C/C++, or Rust; Git; good communication; junior or senior standing.
Python, C/C++, Rust, Git, AWS, GCP, Azure, Docker, CI/CD, Infrastructure as Code
2w
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Intern, Applications Developer
Burbank, California, United States
$19/hr OnsiteInternship
Pursuing CS/SE degree; knowledge of Python/JavaScript; Linux familiarity; GitHub/Atlassian tools; basic SDLC; strong problem solving and communication; team player.
Python, JavaScript, Linux, GitHub, Confluence, Jira
1mo
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Firmware Engineer
Westlake Village or Santa Clara
$87k-$129k/yr OnsiteFull Time
2+ YOEBachelor in Computer Engineering or CS; 0-2 yrs; ARM/RISC-V; C and Python; RTOS basics; embedded drivers; SPI/I2C/UART; schematics; Git/IDEs; Doxygen; English; multitasking.
ARM architecture, RISC-V, C, Python, Git, IDEs, Make, Doxygen, RTOS, SPI, I2C, MDIO, UART, Schematic reading
2mo
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Software Engineer - Data Engineering
San Francisco or Los Angeles
$140k-$220k/yr HybridFull Time
1+ YOE1-2 years of software/data engineering; Python and SQL; building data pipelines; data modeling; real-time data handling.
Python, SQL, Kafka, Spark Streaming, Flink, Palantir Foundry, Azure, AWS, GCP, Docker, Kubernetes, NoSQL databases
1d
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Software Development Engineer I
Washington or Reston or San Diego or San Francisco or Wilmington or Phoenix or Los Angeles or Houston or Boston or Austin or Atlanta or Raleigh or Baltimore or New York or Dallas or Palo Alto or Short Hills or Minneapolis or Chicago or Seattle or Philadelphia or Miami
$37-$59/hr HybridFull Time
1+ YOE1-3 years programming with Node.js, Python, C#, Razor, MVC; SQL databases; JavaScript frameworks; HTML/CSS; strong communication.
Node.js, Python, C#, Razor, MVC, Visual Studio Code, MS Graph, APIs, Git, Azure DevOps, SQL, HTML, CSS, JavaScript
1mo
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AI Engineer (On-Site, Calabasas Office - Immediate Hire)
Calabasas, California, United States
OnsiteFull Time
2+ YOE2–3 years in AI engineering or software development; strong AI prompting; RESTful API design; Python, React, Node.js, Express.js, Ruby on Rails; SQL databases; AWS/Heroku; AI tools; onsite in Calabasas, CA; Bachelor's in CS.
Python, React, Node.js, Express.js, Ruby on Rails, SQL, MySQL, PostgreSQL, AWS, Heroku, GitHub CI/CD, Claude, Cursor, OpenAI, RESTful API
3mo
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Software Test Engineer
Los Angeles, California, United States
OnsiteFull Time
Bachelor's in CS/EE; strong Python/C/C++; testing across Windows/Linux/MacOS/Android; networking basics; US citizenship; background check required.
Python, C/C++, Wireshark, TCPDump, Putty, Minicom
3w
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Software Engineer Intern
Camarillo, California, United States
$23-$40/hr OnsiteFull Time
Currently enrolled in engineering; strong academics; experience with Java, C#, C/C++, Python; able to obtain U.S. security clearance.
Java, C#, C/C++, Python
2mo
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Software Engineer Intern
San Francisco or Los Angeles or New York City
$35-$45/hr HybridInternship
0+ YOEPursuing CS degree, 2+ years of college, Python, SQL, math and stats, AI/ML project experience, 10-week commitment, able to work independently.
Python, SQL, MySQL, PostgreSQL, AI/ML tools
1w
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Embedded Software Engineer I
El Segundo, California, United States
$63k-$120k/yr OnsiteFull Time
0+ YOEBachelor’s in STEM; <2 years of experience; C++/Java; Python/Perl/bash; U.S. citizenship; ability to obtain DoD clearance.
C++, Java, Python, Perl, bash, Linux, Git, CMake, gdb, Wireshark
2mo
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Research Engineer Intern
Bellevue or Los Angeles
OnsiteFull Time, Internship
PhD student in computer science or a related field; strong Python and ML framework experience; knowledge of distributed data processing and cloud platforms; able to contribute to large-scale ML research.
Python, PyTorch, TensorFlow, Keras, JAX, NumPy, Apache Spark, Apache Beam, GCP, AWS
2mo
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Web Interface Software Engineer
Los Angeles, California, United States
$43-$57/hr HybridFull Time
1+ YOEBachelor’s in Electrical Engineering, Computer Science, or Computer Engineering; 1 year JS/HTML/Python; web UI; U.S. person; background check and drug test required.
JavaScript, HTML, Python, C
1mo
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DSP Engineer (Early Career)
Torrance, California, United States
$120k-$140k/yr OnsiteFull Time
2+ YOEBachelor’s degree with 2+ years in numerical algorithm development, or Master’s degree; strong Python; C++ or Rust; DSP and digital communications knowledge.
Python, C++, Rust, GNU Radio
1w
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Analytics Engineer
Sylmar, California, United States
$82k-$141k/yr OnsiteFull Time
1+ YOEDevelop, construct, test, and maintain data architectures; build and maintain data pipelines; ensure data quality and reliability; work with SQL, Python, R, SAS; 1+ year experience; Bachelor's preferred in relevant fields.
SQL, SAS, R, Python
1w
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WSoC RF Test Automation Engineer
Los Angeles or San Francisco or San Diego or Waltham
OnsiteFull Time
Bachelor's degree required; experience in test automation, firmware/software regression, and RF/SOC hardware environments; strong scripting (Python) and C/C++ skills; familiarity with lab equipment and data tooling.
Python, C/C++, SCPI, Git, CI/CD, SPI, I2C, JTAG, Lab Equipment, Signal Generator, Signal Analyzer, Spectrum Analyzer
1w
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Software Development Engineer in Test (SDET)
Santa Monica, California, United States
$98k-$131k/yr HybridFull Time
2+ YOEMinimum 2 years in software test development; SQL, Python/Java, ETL; UI automation; CICD; cloud platforms; BS CS or equivalent.
SQL, Python, Java, ETL, Selenium, Robot, Watir, Jenkins, Spinnaker, Cloud Platforms (AWS,AWS, Azure, GCP), Snowflake
3mo
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Data Engineer
El Segundo or New York
$80k-$95k/yr OnsiteFull Time
3+ YOE3+ years in data engineering with SQL, BigQuery, ETL/ELT pipelines, Looker/Tableau, Python; strong communicator; interest in sports data.
BigQuery, SQL, Looker, dbt, Airflow, Fivetran, Python, Tableau, Mode
1mo
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Mechanical Engineer (HVAC - Intern)
Los Angeles, California, United States
OnsiteInternship
0+ YOEPursuing a Bachelor’s in Mechanical Engineering; junior/senior preferred. Coursework in HVAC design, heat transfer, thermodynamics, and fluid dynamics. Familiar with Revit/AutoCAD; interest in energy analysis, BIM, coding, and design tools. Collaborative communicator.
Revit, AutoCAD, IES, BIM, Dynamo, Grasshopper, Python, C#
2w
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GNC Engineer I
Playa Vista, California, United States
$77k-$116k/yr OnsiteFull Time
1+ YOEBachelor’s in engineering; 1+ year internship/experience; MATLAB/Python/C++ proficiency; data analysis; strong communication; startup-ready.
MATLAB, Python, C++, Git
3w
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Avionics Test Engineer (Starshield)
Hawthorne, California, United States
$105k-$145k/yr OnsiteFull Time
1+ YOEBachelor's in EE or computer engineering; 1+ years hardware or software experience; 1+ years Python/MATLAB/Embedded C/C++
Python, MATLAB, Embedded C/C++, PCB design, Oscilloscopes, DAQs, Vector Network Analyzers, Spectrum Analyzers
5d
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Forward Deployed Engineer I, GenAI, Google Cloud
San Francisco or Atlanta or Austin or Boulder or Cambridge or Chicago or Addison or Detroit or Irvine or Kirkland or Miami or New York City or Portland or Los Angeles or Reston or Seattle or Sunnyvale or Washington D.C.
$102k-$145k/yr OnsiteFull Time
1+ YOEBachelor's degree; experience in AI, Python/Typescript; cloud experience; applied AI knowledge.
Python, Typescript, Cloud Platform, LangGraph, CrewAI, Google ADK, RAG, MCP
1mo
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Machine Learning Engineer, FOX Forward Deployed
Los Angeles, California, United States
$74k-$130k/yr HybridFull Time
Foundations in ML/statistics/data science; Python and ML frameworks; building, evaluating, and deploying models; production-oriented mindset; working with large datasets.
Python, TensorFlow, PyTorch, AWS SageMaker, Bedrock, Google Vertex AI, Databricks, Snowflake
1w
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Software Engineering Internship
Torrance, California, United States
OnsiteFull Time, Internship
Internship requiring strong programming fundamentals, Python or TypeScript, APIs, cloud, and collaboration.
Python, TypeScript, APIs, AWS, React, SQL
2w
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Site Reliability Engineer Intern
Irvine or Los Angeles
$27-$52/hr OnsiteFull Time
Pursuing CS/engineering degree; graduation 2026-2027; proficient in Go/Python/Java/C++; strong problem-solving; self-motivated; good communication; cloud-native and Kubernetes a plus.
Go, Python, Java, C++, Linux, Kubernetes
1w
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ASSOCIATE TEST ENGINEER
Torrance, California, United States
$75k-$100k/yr OnsiteFull Time
1+ YOEEntry-level to 1-3 years in multimedia hardware testing; B.S. in Electrical Engineering; hands-on lab work; onsite Torrance, CA.
Oscilloscopes, Logic Analyzers, Multimedia test equipment, PHABRIX, Quantum Data, Audio Precision, HDMI, SDI, SDVOE, Python, Scripting
1mo
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Technical Support Engineer
San Francisco or Salt Lake City or Phoenix or Los Angeles or Chicago or Boston or Austin or New York City or Miami or Tampa or Atlanta or Columbus or Boise or San Diego or Minneapolis or Houston or Raleigh or Nashville or Kansas City or Charlotte or Portland or Philadelphia or Dallas or Washington D.C. or Seattle
$86k-$118k/yr RemoteFull Time
2+ YOE2+ years technical issue resolution in global support; experience with SaaS or financial services; programming in JS, PHP, Objective-C, Python, Golang, Solidity; knowledge of AWS/GCP, REST APIs; strong problem-solving and communication; weekend availability; multilingual preferred.
SQL, Postman, Kibana, Jira, Salesforce, Confluence, Discord, Gradual, GitHub Copilot, Cursor, Claude Code
5d
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Associate Space Communications Systems Engineer Analyst
El Segundo, California, United States
$99k-$133k/yr OnsiteFull Time
2+ YOEUS citizenship required; ability to obtain US security clearance; bachelor's in engineering, computer science, data science, mathematics or related field; RF/link analysis and waveform analysis experience; programming in Python/MATLAB/C/C++/Java; 2+ years' related experience or equivalent.
Python, MATLAB, C++, Java
2mo
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Radiation Effects Engineer
Los Angeles, California, United States
$100k-$130k/yr OnsiteFull Time
1+ YOE1+ years in assembling, integrating, and testing electrical components; aerospace experience; radiation effects testing preferred; strong electrical lab skills.
Oscilloscopes, Power supplies, SMUs, Function generators, Logic analyzers, DAQs, Python, Linux, C++, Rust, Visual Studio
5d
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Hardware Design Engineer
Calabasas, California, United States
$77k-$128k/yr OnsiteFull Time
1+ YOEBSEE or CSE (or equivalent) with at least 1 year of engineering experience; strong writing/communication; PC architecture; Linux/Windows experience; test equipment proficiency; hardware troubleshooting; schematics; Cadence Allegro/Orcad; mechanical aptitude; self-motivated.
DMM, DSO, Logic Analyzer, Oscilloscope, Spectrum Analyzer, Network Analyzer, Cadence Allegro, Orcad, Linux, Windows, Python, Bash, VHDL, C, TCL
4w
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Process Engineer (Advanced R&D)
Hawthorne, California, United States
$95k-$140k/yr OnsiteFull Time
Bachelor’s in material science, physics, or similar engineering; strong physics fundamentals; experience with experimental design and data analysis; ability to interpret large data sets.
Python, MATLAB, R, JMP, Minitab
2mo
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Entry-Level Structural Engineer | Designer
Sacramento or Los Angeles or San Diego or Detroit or Grand Rapids or Orange or Oakland
$84k-$112k/yr HybridFull Time
0+ YOEEntry-level structural engineer with strong academics; MS preferred or BS with 1-2 years experience; GPA 3.40+; US work authorization; strong communication.
AutoCAD, Tekla Structures, RISA, RAM Structural System, Revit, MS Excel, MathCAD, SAP2000, ETABS, Python
1w
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Electrical Engineer, Engineering Rotational Program
Torrance, California, United States
OnsiteFull Time
Bachelor’s or Master’s in Electrical or Computer Engineering; GPA 3.1; prior co-op/internship; able to present to diverse stakeholders; multi-priority management; quick to learn new tools/technologies.
Mentor Graphics, LabVIEW, MATLAB, Python, C/C++, Spice, Systems design tools
1mo
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Summer 2026 Artificial Intelligence / Machine Learning Intern - Graduate Student
Seattle or Los Angeles or Denver
$38/hr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
0+ YOEU.S. citizen or permanent resident or asylum/refugee status; enrolled undergrad with at least one semester/quarter remaining; completed at least one year of post-high school coursework; available for full-time internship (~12 weeks); strong communication; interest in mission; ML/AI exposure plus Python/Torch skills.
Python, Torch, AWS, Git, Docker, Kubernetes, React, JavaScript, HTML, CSS
4d
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Graduate Mechanical Engineer in Los Angeles, California, United States
Los Angeles or San Francisco
HybridFull Time
Bachelor’s degree in Mechanical Engineering or related field; strong interest in built environment and sustainability; internship or project experience preferred.
Revit MEP, CFD, Dynamo, Python, Grasshopper
4d
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Graduate Mechanical Engineer in Los Angeles, California, United States
Los Angeles or San Francisco
HybridFull Time
0+ YOERecent graduate with degree in mechanical engineering; internship or project experience; strong communication; leadership and teamwork; eligible to work in the US; interest in sustainable built environment.
Revit MEP, Energy modeling, CFD, Dynamo, Python, Grasshopper
HiringCafe market data
Junior Python Developer Jobs market signals in Castaic, CA, US
These signals come from live HiringCafe job inventory, not a static article. Use them to compare the market, then open listings above to apply directly.
Open jobs
120+
Hiring companies
59
Fresh sample
48% new in 30d
Salary visibility
75% show pay
Companies appearing in this market
General MatterMotorola SolutionsSpaceXThe Aerospace CorporationVarda Space IndustriesAppleK2 SpaceKBR
Work location mix in visible results
Onsite: 53Hybrid: 15Remote: 1