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L3 Jobs in California (NOW HIRING)

Sophia Space

Senior Avionics Engineer - L3

Pasadena, CA · On-site

$128K - $157K/yr

We are seeking a Senior (L3) Avionics Engineer to contribute to the design, analysis, integration, and verification of spacecraft avionics hardware supporting both command and data handling (C&DH ...

Jobsbridge

Network Engineer

Palo Alto, CA · On-site

Company Description Intelliswift Software, Inc Looking for someone which L2/L3 networking experience (preferably on cisco and cumulus) mid-level Linux administration VMware and scripting is good to ...

Zones LLC.

L3 IT Service Desk Engineer

San Jose, CA · On-site

$35 - $39/wk

M-F- 8-5pm What you will do as the L3 IT Service Desk Engineer: You will help provide technical information to education and service teams,and may assist with teaching and presenting technical ...

Jobsbridge

Network Engineer

San Jose, CA · On-site

... L3 troubleshooting to determine root cause of software or hardware failure issues. -expert level knowledge on TCP/IP, IP Addressing architecture, Routing Protocols (BGP, OSPF, ISIS etc.), MPLS,IPv6 ...

Ztek Consulting INC

Cassandra Admin

San Jose, CA · On-site

Cassandra / DataStax L3 DBA - RTP, NC | PST Shift Primary Skills - Mandatory 6+ years of experience in Apache Cassandra / DataStax Enterprise (DSE) administration. Strong hands-on production ...

Zones LLC.

L3 IT Service Desk Engineer

San Jose, CA · On-site

$39/hr

M-F- 8-5pm What you will do as the L3 IT Service Desk Engineer: You will help provide technical information to education and service teams,and may assist with teaching and presenting technical ...

Zones

L3 IT Service Desk Engineer

San Jose, CA · On-site

$39/hr

M-F- 8-5pm What you will do as the L3 IT Service Desk Engineer: You will help provide technical information to education and service teams,and may assist with teaching and presenting technical ...

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How much do l3 jobs pay per hour?

As of Sep 8, 2026, the average hourly pay for l3 in California is $41.76, according to ZipRecruiter salary data. Most workers in this role earn between $29.42 and $53.90 per hour, depending on experience, location, and employer.

What is an L3?

L3 typically refers to a 'Level 3' position within a company's job leveling system, especially in technology firms. It often indicates an entry-level or early-career role, such as a software engineer who has some professional experience but is not yet at a senior or specialized level. The responsibilities usually include writing code, fixing bugs, and collaborating with other team members under guidance. Exact duties and requirements can vary by company, but L3 roles generally serve as a foundation for further professional growth.

What skills and qualifications are needed to thrive as an L3?

To thrive as a Level 3 IT Support Technician, you need advanced troubleshooting skills, in-depth knowledge of operating systems and networks, and usually industry certifications like CompTIA, Microsoft, or Cisco credentials. Familiarity with ticketing systems, remote management tools, and enterprise-level hardware and software is typically required. Strong problem-solving abilities, effective communication, and the ability to remain calm under pressure are standout soft skills in this role. These competencies are crucial for resolving complex technical issues efficiently and ensuring minimal disruption to business operations.

What are common challenges faced by L3 support engineers, and how can they manage them?

L3 support engineers often handle the most complex and unresolved technical issues that have been escalated from lower support tiers. A common challenge is diagnosing problems that do not have straightforward solutions, frequently requiring in-depth analysis and collaboration with development teams. Effective management of these situations involves strong troubleshooting skills, clear communication with stakeholders, and maintaining detailed documentation. Building strong relationships with other technical teams and staying updated on product changes are also crucial for success in this role.

What is the difference between L3 vs Network Technician?

AspectL3Network Technician
Required CertificationsCCNA, CompTIA Network+CCNA, CompTIA Network+
Work EnvironmentData centers, enterprise networksOffice, on-site client locations
Employer & Industry UsageIT service providers, large corporationsTelecom, IT support companies

Both L3 and Network Technicians often hold similar certifications and work in network environments. L3 roles typically involve advanced troubleshooting, network design, and configuration, often within larger organizations or data centers. Network Technicians focus on installation, maintenance, and basic troubleshooting. While their skills overlap, L3 positions usually require more experience and deeper technical knowledge, making them suitable for more complex network tasks.

What are popular job titles related to L3 jobs in California?

For L3 jobs in California, the most frequently searched job titles are:

What job categories do people searching L3 jobs in California look for?

The top searched job categories for L3 jobs in California are:

What cities in California are hiring for L3 jobs?

Cities in California with the most L3 job openings:

L3 jobs near you
Infographic showing various L3 job openings in California as of August 2026, with employment types broken down into 83% Full Time, 7% Part Time, 9% Contract, and 1% Nights. Highlights an 85% Physical, 9% Hybrid, and 6% Remote job distribution, with an average salary of $86,852 per year, or $41.8 per hour.

Senior Avionics Engineer - L3

Sophia Space

Pasadena, CA • On-site

$128K - $157K/yr

Full-time

Re-posted 16 days ago

Job description

Sophia Space is a venture-backed deep technology company building high-performance, energy-efficient computing systems designed to operate in orbit. Our work sits at the intersection of aerospace systems, advanced computing, artificial intelligence, and applied physics, enabling a new generation of distributed edge computing capabilities in space.
Having successfully completed our Seed financing, Sophia is focused on scaling its team, products, and capabilities as we prepare for the next stage of growth. We are building a world-class engineering organization that combines expertise from aerospace, cloud computing, robotics, and AI to solve some of the most challenging problems in space infrastructure. As both a product company and an engineering-driven organization, we actively leverage modern AI tools throughout our development process to accelerate learning, improve productivity, and help deliver innovative, environmentally responsible computing platforms for the future.
Job Description
Sophia Space is developing the Tile avionics platform that powers our orbital computing architecture. We are seeking a Senior (L3) Avionics Engineer to contribute to the design, analysis, integration, and verification of spacecraft avionics hardware supporting both command and data handling (C&DH) and electrical power system (EPS) functions.
Working closely with the Avionics Lead, firmware engineers, PCB designers, systems engineers, and mechanical and thermal teams, this role supports development of embedded compute hardware, power electronics, board bring-up, and hardware integration activities. The engineer will independently lead significant technical efforts within the avionics subsystem while contributing to cross-disciplinary spacecraft development from concept through qualification and flight.
Location & Eligibility
This position is primarily in-person in Pasadena, California, with occasional hybrid flexibility based on business needs.
This position requires access to technology that is subject to U.S. export control laws. To comply with applicable ITAR and EAR regulations, applicants must qualify as a U.S. Person, as defined under those regulations. U.S. Persons generally include U.S. citizens, lawful permanent residents (green card holders), and certain protected individuals as defined by applicable law.
Primary Responsibilities
Avionics Hardware Development
  • Design, analyze, and verify avionics hardware supporting spacecraft command and data handling and electrical power systems.
  • Develop analog, digital, and mixed-signal circuitry supporting embedded computing, power distribution, and spacecraft interfaces.
  • Support schematic development, PCB layout reviews, component selection, and design verification.
  • Collaborate with firmware engineers to ensure robust hardware-software integration.

Hardware Analysis & Verification
  • Perform circuit analysis, control-loop evaluation, power integrity analysis, and hardware characterization.
  • Validate designs using simulation, laboratory measurements, and subsystem testing.
  • Support component derating, fault protection, grounding strategies, and electrical interface verification.
  • Participate in subsystem trade studies balancing performance, reliability, manufacturability, and schedule.

Hardware Integration & Test
  • Support board bring-up, laboratory debugging, subsystem integration, and environmental qualification.
  • Develop and operate avionics testbeds supporting functional verification and hardware characterization.
  • Investigate hardware anomalies and perform root-cause analysis throughout development and testing.
  • Support environmental qualification activities including TVAC, vibration, EMC, and system integration campaigns.

Cross-Disciplinary Engineering
  • Collaborate closely with systems, software, mechanical, thermal, manufacturing, and integration teams throughout spacecraft development.
  • Support requirements development, interface definition, technical documentation, and major engineering reviews.
  • Contribute to successful hardware delivery through disciplined engineering execution and effective technical communication.

Required Skills
  • B.S. or M.S. in Electrical Engineering or related engineering discipline.
  • 5-8 years of experience developing avionics, embedded electronics, or high-reliability electronic systems.
  • Experience designing analog, digital, or mixed-signal electronic hardware.
  • Experience supporting board bring-up, laboratory debugging, and hardware integration.
  • Strong understanding of embedded electronics, power electronics fundamentals, and hardware verification techniques.
  • Experience with schematic capture, PCB design reviews, component selection, and laboratory instrumentation.
  • Strong analytical, troubleshooting, and technical communication skills.
  • Ability to independently execute technical work while collaborating across multidisciplinary engineering teams.

Desired Skills
Command & Data Handling (C&DH)
  • Experience developing spacecraft command and data handling electronics using processors, FPGAs, or System-on-Module (SoM) architectures.
  • Familiarity with embedded interfaces such as Ethernet, CAN, SPI, I²C, UART, SpaceWire, PCIe, or USB.
  • Experience supporting hardware-software integration, board bring-up, and embedded firmware validation.

Electrical Power Systems (EPS)
  • Experience designing spacecraft electrical power systems, including switching power supplies, battery interfaces, solar regulation, and power distribution.
  • Familiarity with power integrity, control-loop analysis, fault protection, EMI mitigation, grounding strategies, and electrical characterization.
  • Experience using programmable loads, battery emulators, solar simulators, or similar power electronics laboratory equipment.

Spacecraft Hardware Development
  • Experience supporting spacecraft avionics from requirements through integration, qualification, launch, or flight operations.
  • Familiarity with radiation-aware design, derating practices, and space-qualified electronic components.
  • Experience participating in SRR, PDR, CDR, TRR, or Flight Readiness Reviews.

Integration & Test
  • Experience with avionics integration testbeds, hardware-in-the-loop environments, or spacecraft environmental testing.
  • Hands-on experience with board bring-up, TVAC, vibration, EMC, and system-level integration activities.

Spacecraft Systems
  • Understanding of spacecraft subsystem interactions including systems engineering, software, communications, mechanical, and thermal interfaces.
  • Experience contributing to ICDs, requirements verification, technical trade studies, or subsystem integration.

The pay range for this role is:
128,000 - 157,000 USD per year (Pasadena, CA)

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