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We figured out the best technology companies to work for in California using data on salaries, company financial health, and employee diversity. You can also search for the best technology companies to work for in any other state or city.

Zippia score 4.4
Space Exploration Technologies Corp. is an American space manufacturer, a provider of space transportation services, and a communications corporation headquartered in Hawthorne, California.
Zippia score 4.3
OSI Systems, Inc., together with its subsidiaries, designs, manufactures, and sells specialized electronic systems and components for applications in homeland security, healthcare, and defense and aerospace markets worldwide. It operates in three divisions: Security, Healthcare, and Optoelectronics and Manufacturing. The Security division offers security and inspection systems under the Rapiscan Systems name. Its products are used to inspect baggage, cargo, vehicles, and other objects for weapons, explosives, drugs, and other contraband, as well as to screen people. These products are also used in the verification of cargo manifests for the purpose of assessing duties, and monitoring the export and import of controlled materials. The Healthcare division provides patient monitoring, diagnostic cardiology, and anesthesia delivery and ventilation systems under the Spacelabs name. These products are used in critical care, emergency, and perioperative areas within hospitals, physicianâ€:tm:s offices, medical clinics, and ambulatory surgery centers. The Optoelectronics and Manufacturing division designs, manufactures, and markets optoelectronic devices under the OSI Optoelectronics name. It also provides electronics manufacturing services under the OSI Electronics name for use in a range of applications, including aerospace and defense electronics, security and inspection systems, medical imaging and diagnostics, computed tomography, telecommunications, office automation, computer peripherals, and industrial automation. In addition, this division designs toll and traffic management systems under the OSI LaserScan name and systems for measuring bone density under the Osteometer name. OSI Systems, Inc. was founded in 1987 and is headquartered in Hawthorne, California.
Zippia score 3.8
The Third Revolution in Aviation has begun and Ampaire is leading the charge by developing aircraft that make flying clean, quiet, safe, reliable, affordable, and more accessible to more people than ever before. With key innovations in energy storage, propulsion, and aircraft architecture, the Ampaire team is maximizing the potential of the aircraft industry. Ampaire is a portfolio company of the Los Angeles Cleantech Incubator. It was founded in year 2016 and is based in Los Angeles, California.
Zippia score 3.5
OSI Optoelectronics, Inc. develops and manufactures standard and custom photodiode and optical sensors worldwide. It offers custom and OEM solutions, such as custom silicon, InGaAs, and GaAs photodiodes, as well as semiconductor devices; manual and automated gold and aluminum wire bonding; device assembly and packaging; high performance ceramic hybrids; automated PCB assembly; manual and automated production testing and fixtures; custom cable assemblies; plastic molded packaging; complete box-build; and environmental test and qualification solutions for aerospace and defense, life and health science, optical communications, industrial test and measurement, commercial and consumer, and X-Ray sectors. The company also provides standard products, such as parametric products, silicon photodiodes, and InGaAs and GaAs photodiodes. OSI Optoelectronics, Inc. was formerly known as UDT Sensors, Inc. and changed its name to OSI Optoelectronics, Inc. in February 2006. The company was founded in 1967 and is headquartered in Hawthorne, California with manufacturing facilities in India and Malaysia. OSI Optoelectronics, Inc. operates as a subsidiary of OSI Systems, Inc.
| Rank | Company | Zippia score |
|---|---|---|
| 1 | SpaceX | |
| 2 | OSI Systems | |
| 3 | Ampaire | |
| 4 | OSI Optoelectronics |