Tech Jobs in Ontario, CA
172,772 open positions · Updated daily
Ontario, CA sits in the heart of Orange County, a region that blends the innovation of the Greater Los Angeles tech corridor with a more affordable lifestyle. The city’s proximity to major hubs like Irvine, Santa Ana, and the bustling downtown Los Angeles area means tech talent can tap into a diverse ecosystem of startups, established firms, and research institutions while enjoying a lower cost of living. The presence of the Ontario International Airport further fuels a strong logistics technology sector, attracting companies that need real‑time data solutions for freight and supply chain operations.
Tech companies in Ontario span several verticals. Software and web development firms such as Adobe’s regional office and Oracle’s Irvine branch thrive here, alongside biotech innovators like Genentech’s Orange County lab and Life Sciences Park startups. The city also hosts hardware manufacturers, including Intel’s manufacturing plant in nearby Santa Ana, and telecommunications leaders like T‑Mobile’s Orange County headquarters. With the University of California, Irvine nearby, research collaborations and talent pipelines flow directly into local tech teams.
Ontario’s median rent hovers around $2,500 a month, significantly below the $3,500 average in central Los Angeles, but salaries for tech roles have been rising to match the talent demand. Salary transparency is therefore essential for candidates to negotiate competitively and for employers to attract the best talent. Knowing the exact pay range for roles such as software engineers, data scientists, or product managers helps job seekers evaluate whether a position aligns with their financial goals and lifestyle needs.
Substitute Teacher K-12
Company: Scoot Education
Location: San Diego, CA
Posted Sep 08, 2025
Earn up to $168 - $221 for day-to-day assignments and more for long-term pay varies by certification, school, and assignment. A TB risk assessment or test.
Laborer-Parking Maintenance (Laborer I)
Company: San Diego State University
Location: San Diego, CA
Posted Sep 08, 2025
Campus & Community: Access to the library, campus events, employee groups, and volunteer and social activities.
Substation Electrician-General Construction, Journey Level (All Regions)
Company: Pacific Gas and Electric Company
Location: San Jose, CA
Posted Sep 07, 2025
Uses power tools and hand tools to install equipment and systems, such as wire terminations, high voltage equipment, overhead and underground electrical and…
Accountant/Bookkeeper
Company: Property Management
Location: Los Angeles, CA
Posted Sep 07, 2025
Perform *bank and credit card reconciliations*. Assist with *budgeting, forecasting*, and *audit prep*. Job Type:* Full-time (Part-time option available).
Carpenter/Maintenance Technician
Company: castaic truck stop
Location: San Fernando Valley, CA
Posted Sep 07, 2025
Authorized to work in the U.S.; valid driver’s license preferred. Apply:* *Message us in Indeed* (no phone calls). We keep facilities spotless and safe.
Software Integrity Engineer - CoreOS Performance QE
Company: Apple
Location: San Diego, CA
Posted Sep 07, 2025
You'll also troubleshoot and debug automation issues, develop and modify test plans, and help ensure a seamless experience for our users.
Staff Software Engineer, AI/Machine Learning
Company: PSEMI CORPORATION
Location: San Diego, CA
Posted Sep 08, 2025
As a Staff Software Engineer specializing in AI/ML, you will be entrusted with end-to-end ownership of designing, developing, and deploying state-of-the-art AI/…
Registered Nurse - Skilled Nursing Facility
Company: Herman Healthcare Center
Location: San Jose, CA
Posted Sep 06, 2025
A valid California RN license, or proof that license will be complete or renewed soon. From a short-term rehabilitation stay to long term nursing care, each of…
Customer Service Representative - Temporary
Company: Gentle Dental
Location: San Diego, CA
Posted Sep 07, 2025
A minimum of 1 to 2 years front office experience in a medical environment. At Gentle Dental, our Customer Service Representative manage patients full cycle…
Lead Class A Hazmat Driver (Hazmat + Tanker Endorsement REQUIRED, No Automatic Restrictions)
Company: Clean Harbors
Location: San Jose, CA
Posted Sep 08, 2025
This role is responsible for performing driving and non-driving duties on and off customer sites associated with hazardous waste clean-up.
Window Treatment Specialist
Company: Arena Direct Hire
Location: Los Angeles, CA
Posted Sep 07, 2025
Utilize hand tools and power tools safely and effectively during the installation process. Familiarity with hand tools and power tools commonly used in…
Senior Software Engineer - Data Cloud
Company: Apple
Location: San Diego, CA
Posted Sep 07, 2025
We are seeking a highly motivated software engineer to build scalable services, data extraction tools, infrastructure as code automation, and AI agents in a…