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144 junior java jobs at 43 companies in Ontario, CA

1d
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Java Developer
Santa Ana, California, United States
OnsiteFull Time
Artificial Compute
Artificial Compute: AI workforce platform for business process automation and agents.
Role for a Java developer.
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2w
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Software Development Engineer (Java)
Irvine or Dallas or Austin
$107k-$130k/yr HybridFull Time
Cotality
Cotality: Provider of property intelligence, data, and analytics solutions.
2+ YOE2+ years software development experience; proficiency with Java, Spring Boot, REST/GraphQL APIs, cloud platforms (GCP), CI/CD; strong problem-solving and communication skills.
Java, GraphQL, Google Cloud Platform (GCP), Spring Boot, Spring Framework, Spring MVC, Spring Data, REST APIs, CI/CD, GitHub Copilot, Gemini
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2w
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Software Engineer/Principal Software Engineer - Java
San Diego or El Segundo
$92k-$171k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Develops and manufactures advanced aerospace, defense, and space systems.
2+ YOEMust be able to obtain/transfer Top Secret clearance and SAP access; experience developing Java/JEE applications, JMS, Web Services, XML; Bachelor's degree in STEM (or higher) with 2+ years experience (senior level options require more).
Java, Java Enterprise Edition (JEE), JMS, Web Services, XML, XPath, XSLT, XSD, Kubernetes, Docker, Ansible, Cucumber, Knockout, microservices
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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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5d
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Associate, Software Engineer (39132)
Yorba Linda, California, United States
$76k-$141k/yr OnsiteFull Time
L3Harris Technologies
L3Harris TechnologiesNYSE: LHX: Aerospace and defense providing mission-critical technology solutions.
Pursuing or recently completed bachelor's in relevant field; experience with C/C++/Java and embedded/real-time systems; SDLC participation, testing, and integration skills.
C++, C#, C, Java, Ruby, JEE, HTML5, XML, SQL, Perl, Python, Ajax, Qt, Windows, Unix, Linux, VxWorks, QNX, Integrity, Windows CE, .NET, SOA, RTOS, Hadoop, Android
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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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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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(Senior) Developer (w/m): Hana Datenbank Portierung – SL Tools (Riverside, CA, US)
Riverside, California, United States
OnsiteFull Time
SAP
SAPFrankfurt Stock Exchange: SAP: Developer of enterprise business software and cloud applications.
Bachelor's degree in computer science, engineering, mathematics or related field; experience with C, Java, Pearl, Python; database knowledge; fluent German and English; teamwork and communication skills.
C, Java, Pearl, Python, SAP HANA, SAP SUM, SWPM, SWDC, Unix, Linux
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1w
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Full Stack Software Engineer, Observability (Starlink)
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's in STEM (or 3+ yrs experience), experience building observability/telemetry systems, proficiency with Python/Go/Java, frontend React/Angular, relational/distributed databases, Docker and Kubernetes.
Python, Go, Java, React, Angular, PostgreSQL, CockroachDB, Docker, Kubernetes
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3mo
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Intermediate Technical Support Analyst
Logan or Los Angeles or United States or Melbourne or Victoria
$55k-$72k/yr HybridFull Time
Journal Technologies
Journal TechnologiesNASDAQ: DJCO: Provides enterprise software for courts and justice system agencies.
2+ YOE2+ years technical support experience with web-hosted/on‑premise/cloud software; working knowledge of Java, HTML, SQL; strong communication, multitasking, and customer-focused troubleshooting skills.
Java, HTML, SQL, Groovy, JavaScript, PL/SQL, Transact-SQL, Crystal Reports
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5d
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AI Engineer
El Segundo, California, United States
$78k-$176k/yr OnsiteFull Time
Booz Allen Hamilton
Booz Allen HamiltonNYSE: BAH: Provides technology and management consulting services to diverse organizations.
2+ YOE2+ years in AI or related engineering, proficiency with generative/agentic AI, experience in software development (Python/C#/Java), ability to obtain Secret clearance, bachelor’s degree required.
LLMs, MCP, LangChain, LangGraph, Python, C#, Java, Cursor, Windsurf, CUDA, RAPIDs, Docker
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2mo
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Head Robotics Team Coach
Santa Ana, California, United States
$20k/yr OnsitePart Time
Mater Dei High School
Mater Dei High School: Catholic college preparatory high school in Santa Ana.
CPR required; familiarity with robotics systems, Java, CAD, 3D printers, mechanical design, and mentoring high school students; bachelor's degree preferred.
Java, CAD, 3D printers
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2d
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Machine Learning Engineer II
Irvine, California, United States
$97k-$162k/yr HybridFull Time
Panasonic Avionics Corporation
Panasonic Avionics CorporationTokyo Stock Exchange: 6752: Provides in-flight entertainment and connectivity systems for airlines.
2+ YOEBachelor's in CS/Data Science/Software Engineering required, 2+ years software engineering experience, proficiency in Python or Java, experience with TensorFlow or PyTorch, machine learning and data-pipeline experience.
Python, Java, TensorFlow, PyTorch
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5d
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Software Engineer
Colorado Springs or Irvine or Longmont or Fremont or Rochester or San Jose
$111k-$148k/yr OnsiteFull Time
Western Digital
Western DigitalNASDAQ: WDC: Design and manufacture data storage devices and systems.
0+ YOEPursuing or recent Bachelor's/Master's in a technical field; experience with C/C++, Python, Java, Go, SQL, or JavaScript through coursework or internships; familiarity with software fundamentals, debugging, and development tools.
C, C++, Python, Java, Go (Golang), SQL, JavaScript, Microsoft Office, Git, Linux, IDEs
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2w
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Software Integration Engineer
El Segundo, California, United States
$87k-$130k/yr OnsiteFull Time
The Aerospace Corporation
The Aerospace Corporation: Provides technical expertise and research for national space programs.
2+ YOEBachelor's in STEM, 2+ years relevant experience with web application development, Spring, Java, Python, RESTful services or Cloud; familiarity with Agile and Atlassian tools; experience with Git/Subversion and Linux/Windows.
Spring Framework, Java, Python, RESTful services, Cloud, containerization, microservices, JIRA, Confluence, BitBucket, SourceTree, Git, Subversion, Windows, Linux, DevSecOps, AI/LLM
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1w
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Flight Software Engineers (Associate / Experienced / Senior)
El Segundo, California, United States
$106k-$232k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
2+ YOEBachelor's degree, U.S. person status with ability to obtain Secret clearance, 2+ years software development experience, proficiency in C/C++/Java/Python, embedded/real-time experience preferred.
C, C++, Java, Python, GitLab, Bitbucket, JIRA, Confluence, Wireshark
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1mo
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Software Engineer II
El Segundo, California, United States
$76k-$144k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: Provides advanced aerospace and defense systems and services.
2+ YOEU.S. citizenship and active, transferable Top Secret clearance; STEM degree with typically 2+ years' experience; experience with C, C++, or Java, Docker, Kubernetes, Agile/DevSecOps, and CI/CD tools.
C, C++, Java, Docker, Kubernetes, Jenkins, Git, Bitbucket, CI/CD, Agile, DevSecOps, Scrum, OMS
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2w
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Security Engineer, Level 4
Los Angeles or Palo Alto or Bellevue or Santa Monica
$157k-$235k/yr OnsiteFull Time
Snap
SnapNYSE: SNAP: Provides visual messaging software and augmented reality wearable devices.
2+ YOE2+ years security-related experience post-Bachelor’s (or equivalent), strong security engineering background, proficiency with programming (Python/Go/Java), security tooling, AI tools, and excellent communication and analytical skills.
Python, Go, Java, SIEM, EDR, AI tools
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3w
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Modeling Simulation & Analysis Engineer (Level 2)
El Segundo, California, United States
$92k-$138k/yr OnsiteFull Time
Northrop Grumman
Northrop GrummanNYSE: NOC: Designs and manufactures advanced aerospace and defense systems.
2+ YOEBachelor's in STEM with 2+ years systems engineering experience, active US Secret clearance, scripting (MATLAB, Python, C++, Java), simulation tools (AFSIM, Suppressor, STK), data visualization, modeling and operational analysis.
MATLAB, Python, C++, Java, AFSIM, Suppressor, STK, Bitbucket, GitHub, Gitlab
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SoftwareDev Eng II – AMZ010452
Culver City, California, United States
$144k-$194k/yr OnsiteFull Time
Amazon
AmazonNASDAQ: AMZN: Global online retail and cloud computing technology provider.
1+ YOEBachelor's in CS/Engineering/Math (or equivalent) and 1+ year experience designing and developing large-scale, multi-tiered, multi-threaded embedded or distributed software using C#, C++, Java, or Perl; strong OOD skills.
C#, C++, Java, Perl
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