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85 developer intern jobs at 66 companies in Lake Elsinore, CA

1mo
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Firmware Engineer Intern
Irvine, California, United States
OnsiteInternship
Fluxergy
Fluxergy: Portable diagnostic platform for rapid point-of-care laboratory testing
0+ YOEEnrollment in a Bachelor’s or Master’s program; 30-40 hours/week; proficiency in C/C++; RTOS exposure; strong problem-solving and communication skills.
C/C++, RTOS, Git, Embedded systems
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1mo
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2027 Software Engineer Intern
Costa Mesa or Irvine or Atlanta or Seattle or Boston or Reston
$45-$50/yr OnsiteInternship, Full Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
Pursuing a Bachelor\u0002s in CS or related field, rising senior returning to school, proficiency in C++, Go, Rust, Java, or Python, familiarity with algorithms, data structures, cloud and front-end concepts, and U.S. Person status required.
C++, Go, Rust, Java, Python, Lattice OS
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2mo
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Manufacturing Engineer Intern
Cerritos, California, United States
$25/hr OnsiteInternship
Amphenol CIT
Amphenol CITNYSE: APH: Designs and manufactures high-performance wire, cable, and interconnect solutions.
0+ YOE0-1 years engineering/CI experience; Lean/manufacturing knowledge; EHS awareness; Bachelor's in Engineering; strong communication; MS Office and Minitab skills.
MS Office, Minitab
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2w
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Manufacturing Engineer Intern
Santa Ana, California, United States
$17-$24/hr OnsitePart Time
Masco
MascoNew York Stock Exchange: MAS: Manufactures and distributes home improvement and building products.
Mechanical/Industrial engineering student; Microsoft Office proficiency; CREO a plus; good communication; intermediate math; able to lift up to 20 lbs; legally authorized to work in the U.S.
Microsoft Outlook, Microsoft Word, Microsoft Excel, CREO
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Intern
Rancho Cucamonga, California, United States
OnsiteInternship
Hillside Community Church
Hillside Community Church: Religious institution providing worship services and community programming.
Internship providing ministry training and leadership development; plan and execute events, foster community connections; 10–20 hours/week from late Aug 2026 to early May 2027.
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ME Intern
Irvine, California, United States
$18-$28/hr OnsiteInternship, Part Time
One-Cycle Control
One-Cycle Control: Manufacturer of high-performance power electronics and conversion technology.
US citizen or Green Card required; ability to read work orders, follow instructions, good communication, attention to detail; minimum 16 hours/week; background check and drug test possible.
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2mo
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Research Intern
Carlsbad or New York
OnsiteFull Time, Internship
Gemological Institute of America
Gemological Institute of America: Provides gemstone grading, gemology education, and scientific research services.
Actively enrolled in a bachelor’s or graduate degree program; gemology or related science preferred.
MS Office
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3w
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Operations Intern
Lake Forest, California, United States
$17-$18/hr OnsiteMultiple Commitments Available
CellCarta
CellCarta: Provides precision medicine laboratory services for drug development.
College student pursuing a degree (biology/lab science/medicine preferred); follows SOPs to digitize and file biological samples and documentation; attention to detail; ability to lift up to 20 lbs; 20–30 hrs/week, temporary 6 months.
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1w
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Hydrogeology Intern
Lakewood, California, United States
$26-$28/hr FieldPart Time
Water Replenishment District of Southern California
Water Replenishment District of Southern California: Manages and protects groundwater resources for Southern Los Angeles County.
Enrolled full-time in a bachelor’s or graduate program in geology/hydrogeology or related field; able to work 10–24 hrs/week; experience with Microsoft Office; fieldwork and data analysis capabilities required.
Microsoft Outlook, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, ArcGIS
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2w
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Manufacturing Engineer Intern
Santa Ana, California, United States
$17-$24/hr OnsitePart Time
Brasstech
BrasstechNYSE: MAS: Manufacturer of premium kitchen and bathroom fixtures and accessories.
Mechanical/Industrial engineering student; strong communication; Microsoft Office; CREO a plus; ability to design fixtures; legal work authorization; occasional lifting to 20 lbs.
Microsoft Outlook, Microsoft Word, Microsoft Excel, CREO
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3w
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Manufacturing Engineer Intern
Santa Fe Springs, California, United States
$20/hr OnsitePart Time
RD Rubber Technology Corporation
RD Rubber Technology Corporation: Manufacturer of custom precision molded rubber components.
Internship requiring familiarity with engineering calculations, CAD modeling, prototyping, manufacturing processes, and the ability to prepare reports and support continuous improvement projects; hands-on manufacturing experience preferred.
CAD
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2w
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Roadway/Highway Intern
Irvine, California, United States
$23-$40/hr OnsitePart Time
Parsons
ParsonsNYSE: PSN: Provides engineering and technology services for infrastructure and defense.
Enrolled in an accredited engineering curriculum (typically 1+ year completed). Responsibilities include roadway design, construction documents, quantity takeoffs, and field surveys.
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Software Engineering Intern, Applications - Fall 2026
Irvine or Palo Alto
$38-$51/hr OnsiteFull Time, Internship
Rivian and Volkswagen Group Technologies
Rivian and Volkswagen Group Technologies: A joint venture developing software-defined vehicle software, connectivity, and infotainment solutions for electric vehicles.
Must be an enrolled Bachelor's or Master's student; proficiency in Kotlin and Android (Android Jetpack) required; Android app development experience and Jenkins (CI) preferred.
Kotlin, Android, Android Jetpack, Jenkins
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1w
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Laboratory Intern - Semi-Volatiles
Orange, California, United States
$17/hr OnsitePart Time, Internship
Onterris
OnterrisNYSE: ONT: Global provider of environmental consulting, testing, and remediation services.
Currently enrolled university student with high school diploma, basic lab techniques, Excel skills, able to follow directions, lift up to 50 lbs, and work safely with acids/solvents.
Microsoft Excel
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1mo
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Intern, Industrial Engineer (Business Excellence)
Aliso Viejo, California, United States
$21-$34/hr OnsiteInternship
MicroVention
MicroVention: Manufacturer of neurovascular medical devices for stroke treatment.
Pursuing a Bachelor’s or Master’s in Business, Engineering, Analytics or related; strong analytical and communication skills; MS Office with Excel emphasis; ability to work cross-functional; eligible to work in the U.S. without visa sponsorship.
Microsoft Office, Microsoft Excel, Power BI
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1w
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Software Engineer 2
Irvine, California, United States
$83k-$132k/yr OnsiteFull Time
Broadcom
BroadcomNASDAQ: AVGO: Designs and sells semiconductors and infrastructure software to enterprises.
3+ YOEBS/MS/PhD in CS/EE or similar; 3+ years relevant experience for BS (0+ for MS/PhD); strong in C/C++, Golang, Python; deep Linux/Unix internals; containerization and Kubernetes experience; strong communication skills.
C, C++, Golang, Python, Docker, containerd, Kubernetes
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1mo
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Intern to Entry Level Conversion - Engineering (Summer 2026 Intern Program)
Seattle or Saint Charles or Huntsville or Portland or Midwest City or Oklahoma City or Berkeley or Miami or Huntington Beach or Hazelwood or Germantown or El Segundo or Fort Walton Beach or Ridgecrest or Tukwila or North Charleston or Kennedy Space Center or Heath or Houston or Fairfax or Colorado Springs or Seal Beach or Long Beach or Newburgh or Renton or Saint Louis or Auburn or Philadelphia or Everett or San Antonio or Kent or Mesa or New Orleans
$50k-$174k/yr OnsiteFull Time
Boeing
BoeingNYSE: BA: Designs and manufactures aircraft, satellites, and defense systems.
Currently enrolled engineering/applied-sciences student with expected graduation before September 2027; previously interned with Boeing; strong academics, collaboration, and technical project experience; ability to meet export-control U.S. Person requirements for many roles.
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1mo
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Training and Development Intern
Carlsbad, California, United States
$25-$30/hr OnsiteMultiple Commitments Available
Breg
Breg: Manufactures orthopedic bracing and cold therapy rehabilitation products.
Currently pursuing a relevant Bachelor's degree; experience with LMS, instructional technology, or content development preferred. Requires proficiency with Microsoft Outlook, Word, Excel, PowerPoint, and Copilot; strong organization and project management skills.
LMS, Microsoft Outlook, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Copilot, Microsoft SharePoint, SCORM, ChatGPT, Claude
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1w
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Beverage Application Intern (6 months)
Laguna Beach, California, United States
$17/hr OnsiteInternship
Symrise
SymriseFrankfurt Stock Exchange: SY1: Global supplier of fragrances, flavors, and cosmetic ingredients.
Pursuing BS/MS in Food Science, Biology, Chemistry or related; commute to Laguna Beach; basic lab equipment use; hazardous material awareness; strong time management and communication.
balances, pH meters, micropipettes
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2w
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Student Intern (Economic Development)
Carlsbad, California, United States
$17-$23/hr OnsitePart Time, Internship
City of Carlsbad
City of Carlsbad: Municipal government providing public services and programs for Carlsbad residents.
Must be currently enrolled in or recently graduated from an accredited program. Requires interest/skill in data analysis, visualization, and digital marketing; proficiency with Tableau, Excel, Python, or GIS preferred.
Tableau, Microsoft Excel, Python, Geographic Information Systems (GIS)
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