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.
Security Engineering Director
Company: OKX
Location: San Jose, CA
Posted Aug 27, 2025
Excellent communication and interpersonal skills, with the ability to articulate complex technical concepts to both technical and non-technical audiences.
Healthcare Security Officer - San Diego, CA
Company: Blackstone Consulting Inc.
Location: San Diego, CA
Posted Aug 27, 2025
Possess a valid government-issued driver's license. Must have a valid Driver's License (preferably with a clean driving record). Active state-issued guard card.
Finish Carpenter / Skilled Worker
Company: Casa Builders Inc.
Location: San Diego, CA
Posted Aug 27, 2025
Must have own tools and truck with capacity to carry some materials and a ladder. Minimum 5 years construction experience. Light computer skills, a plus.
Systems Software Engineer
Company: Apple
Location: San Diego, CA
Posted Aug 27, 2025
As a member of the OS Diagnostics team you will develop and maintain software used to characterize, calibrate and test new hardware, debug software and hardware…
Accountant
Company: BWE, Inc.
Location: San Diego, CA
Posted Aug 27, 2025
*Tax Preparation:* Preparing and filing various state, local, and federal forms, including 1099-NEC and 1099-MISC. A minimum of 5 years’ accounting experience.
Manufacturing Test Engineer – Diagnostics software tools development
Company: Yoh, A Day & Zimmermann Company
Location: Long Beach, CA
Posted Aug 27, 2025
Proficiency in developing data logging systems, working with databases, and creating data analysis tools. 5+ years of relevant experience in manufacturing test…
Divisional Controller
Company: TCI Transportation
Location: Commerce, CA
Posted Aug 27, 2025
As Divisional Controller, you’ll be responsible for the accuracy, integrity, and timeliness of all accounting transactions and financial reports.
Porter / Janitorial
Company: Overton Security
Location: Santa Monica, CA
Posted Aug 27, 2025
General Duties: Maintaining the cleanliness, sanitation, and general order of the building including but not limited to: Cleaning, Dusting, Organizing,…
Software Engineer IV (Principal Software Engineer)
Company: Forward Slope Inc.
Location: San Diego, CA
Posted Aug 28, 2025
RDBMS database design (e.g., PostgreSQL, Oracle DB, MySQL) and data access layer design patterns. Bachelor's degree in computer science, engineering,…
Staff Accountant
Company: Skilled Wound Care
Location: Playa Vista, CA
Posted Aug 28, 2025
Bachelor's degree in Accounting, Finance, or related field (Associate's degree with relevant experience considered).
HVAC Mechanic - Maintenance
Company: Kelly Services
Location: Menlo Park, CA
Posted Aug 27, 2025
We are seeking an HVAC Mechanic with a background in HVAC equipment and control systems including install, troubleshoot, repair, and modify heating, ventilation…
Registered Nurse / Hemodialysis
Company: Children's Hospital Los Angeles
Location: Los Angeles, CA
Posted Aug 28, 2025
Current licensure as a Registered Nurse in the state of California and American Heart Association CPR/BLS/PALS certification required.