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Junior Systems Developer Jobs in California (NOW HIRING)

SATCOM Senior Systems Engineer (Modem)

San Diego, CA · On-site

$110K - $151K/yr

... and junior systems engineers, establish technical review processes, and enforce program engineering standards consistent with the Engineering Management Plan (EMP) Required Qualifications: • ...

Space Systems Engineer

Carlsbad, CA · On-site +1

$176K - $264K/yr

Mentor junior systems engineering staff and contribute to the continuous improvement of internal SE processes. What you'll need * Bachelor's degree in Engineering, Physics, or a related technical ...

SATCOM Senior Systems Engineer (Modem)

San Diego, CA · On-site

$110K - $151K/yr

... junior systems engineers, establish technical review processes, and enforce program engineering standards consistent with the Engineering Management Plan (EMP) Required Qualifications: Bachelor of ...

Senior Systems Engineer

El Segundo, CA

$111K - $152K/yr

Job Overview The Senior Systems Engineer position is a member of the Engineering group within the ... Mentors junior systems administrators * Ensures 24/7 availability of the production servers and ...

Systems Administrator

Los Angeles, CA · On-site

$85K - $120K/yr

... software, engineering, manufacturing, and business teams to move quickly and securely. You will ... The ideal candidate is a technically versatile junior systems administrator who can troubleshoot ...

Jr. Software Developer

Los Angeles, CA · On-site

$72K - $93K/yr

This system is used by organizations to track, calculate, and report scope-categorized GHG emissions data in compliance with regulatory standards. The Junior Software Developer will work across the ...

Jr. Software Developer

Los Angeles, CA

$72K - $93K/yr

This system is used by organizations to track, calculate, and report scope-categorized GHG emissions data in compliance with regulatory standards. The Junior Software Developer will work across the ...

Jr. Software Developer

Los Angeles, CA · On-site

$72K - $93K/yr

This system is used by organizations to track, calculate, and report scope-categorized GHG emissions data in compliance with regulatory standards. The Junior Software Developer will work across the ...

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Junior Systems Developer information

See California salary details

$23.7K

$87.8K

$135.7K

How much do junior systems developer jobs pay per year?

As of Jul 17, 2026, the average yearly pay for junior systems developer in California is $87,810.00, according to ZipRecruiter salary data. Most workers in this role earn between $66,100.00 and $85,900.00 per year, depending on experience, location, and employer.

What is the difference between Junior Systems Developer vs Junior Software Engineer?

AspectJunior Systems DeveloperJunior Software Engineer
Required CredentialsTypically a degree in Computer Science or related field; some certifications like CompTIA or Cisco are commonSimilar credentials; often holds a degree in Computer Science or Software Engineering; certifications like Microsoft or AWS may be relevant
Work EnvironmentWorks mainly on system infrastructure, networks, and hardware integration within organizationsFocuses on developing, testing, and maintaining software applications across various platforms
Employer & Industry UsageUsed in IT departments, tech companies, and organizations with complex infrastructure needsCommon in software firms, tech startups, and companies developing software products

While both roles require technical skills and similar educational backgrounds, Junior Systems Developers primarily focus on system infrastructure and hardware integration, whereas Junior Software Engineers concentrate on software development and programming. The choice depends on whether you prefer working with systems and networks or software applications.

What are the key skills and qualifications needed to thrive as a Junior Systems Developer, and why are they important?

To thrive as a Junior Systems Developer, you need a solid understanding of programming languages (such as Java, Python, or C#), basic software development principles, and often a relevant degree or diploma in computer science or a related field. Familiarity with development environments, version control systems like Git, and possibly certifications such as CompTIA or Microsoft Fundamentals are commonly expected. Strong problem-solving abilities, attention to detail, and effective communication help you collaborate with teams and learn quickly on the job. These skills and qualities are crucial for building reliable systems, adapting to new technologies, and contributing effectively to software projects.

What is a Junior Systems Developer?

A Junior Systems Developer is an entry-level IT professional who assists in designing, developing, testing, and maintaining software systems and applications. They typically work under the supervision of senior developers, helping to write code, debug programs, and support the development process. Junior Systems Developers often collaborate with other team members to ensure that software solutions meet user requirements and function efficiently. This role is ideal for individuals starting their careers in software development and seeking to build foundational technical and problem-solving skills.

What are some common challenges faced by Junior Systems Developers during their first year on the job?

Junior Systems Developers often encounter challenges such as understanding complex legacy systems, adapting to new development tools and workflows, and balancing multiple project priorities. It's common to feel overwhelmed at first, but most teams provide mentorship and code reviews to support your learning curve. Collaboration with senior developers and open communication are key to overcoming obstacles and growing your technical skills.
What are popular job titles related to Junior Systems Developer jobs in California? For Junior Systems Developer jobs in California, the most frequently searched job titles are:
What job categories do people searching Junior Systems Developer jobs in California look for? The top searched job categories for Junior Systems Developer jobs in California are:
What cities in California are hiring for Junior Systems Developer jobs? Cities in California with the most Junior Systems Developer job openings:
Spacecraft Systems Engineer (Experienced) - Millennium Space Systems

Spacecraft Systems Engineer (Experienced) - Millennium Space Systems

Boeing

El Segundo, CA

Full-time

Medical, Life, Retirement

Re-posted 8 days ago


Boeing rating

8.5

Company rating: 8.5 out of 10

Based on 604 frontline employees who took The Breakroom Quiz

33rd of 528 rated manufacturers


Job description

Spacecraft Systems Engineer (Experienced) - Millennium Space Systems

Company:

Millennium Space Systems

Millennium Space Systems, a part of Boeing Defense, Space and Security (BDS), is a fast, agile small satellite company focused on national security space. Our missions have direct impact to global security, like missile warning and Earth observation.

Our team is curious, bold and innovative. We take risks, innovate and explore new techniques and technologies. We influence change because we challenge the status quo. And when we watch our satellites launch, we know each one of us made it happen.

As an Experienced Spacecraft Systems Engineer, you will be responsible for supporting the technical execution for programs and leading teams developing spacecraft systems serving a range of missions and customers. This includes creating, monitoring, and guiding requirements definition, spacecraft design, procurement and fabrication, integration and test, and verification and validation of the overall space vehicle system. You will interact with subsystem and unit engineers, manufacturing and test personnel, and program management. You will manage the technical elements of the space vehicle system. Our spacecraft systems engineers create spacecraft -- not just paperwork!

Position Responsibilities:

  • Responsible for all aspects of spacecraft systems engineering including performing preliminary concept development, trade studies, CONOPS definition, requirements decomposition and allocation, interface requirements definition, requirements verification and validation, support to integration and test operations, anomaly resolution, risk management, and schedule execution

  • Collaborates with program and financial leadership to ensure successful programmatic execution

  • Applies an interdisciplinary, collaborative approach to plan, design, develop and verify a lifecycle balanced solution for space systems

  • Understands spacecraft subsystems functions and interfaces. Develop integrated spacecraft system designs and solutions

  • Coordinates and communicates with subsystem engineering teams to ensure system execution

  • Applies model-based systems engineering techniques for the definition of the spacecraft system

  • Participate in software integration and test activities to ensure mission functionality prior to deployment into operations

  • Performs tasks to analyze technical data, verify and sustain specific systems configurations in accordance with defined constraints and operational requirements

  • Performs various analyses to optimize the spacecraft system and/or system architecture

  • Resolves cross-functional technical issues

  • Develops and improve systems engineering processes

  • Provides mentorship to junior systems engineering and subsystem staff

Basic Qualifications (Required Skills / Experience):

  • This position requires the ability to obtain a U.S. Security Clearance. for which the US Government requires U.S. Citizenship. A final U.S. Top Secret security clearance is required post start.

  • Bachelor's degree in engineering or science discipline and 5 or more years of directly relevant industry experience with spacecraft systems; Master's degree and 3+ years of related experience; or an equivalent combination of technical education and experience; Level 4: Bachelor's degree in engineering or science discipline and 9 or more years of directly relevant industry experience with spacecraft systems; Master's degree and 7+ years of related experience; or an equivalent combination of technical education and experience.

  • 1+ years of experience in some or all of the following: Space systems engineering principles and techniques; Power, mass, and other system budgets; Requirements analysis and flow-down; Design verification and validation processes; Configuration management; Satellite level integration and test processes

Preferred Qualifications (Desired Skills/Experience):

  • Master's degree in aerospaceor other relevant engineeringor science discipline

  • 9+ years' professional experience in space systems engineering

  • Direct experience with one or more rapid spacecraft development programs and missions. Experience with a full life cycle from concept to in-orbit operations

  • Demonstrated familiarity with program management principles and tools

  • An Active TS/SCI U.S. Security Clearance.

Conflict of Interest:

Successful candidates for this job must satisfy the Company's Conflict of Interest (COI) assessment process

Drug Free Workplace:

Millennium Space Systems, a Boeing Company, is a Drug Free Workplace (DFW) where post offer applicants and employees are subject to testing for marijuana, cocaine, opioids, amphetamines, PCP, and alcohol when criteria is met as outlined in our policies.

Total Rewards:

At Millennium Space Systems, a Boeing Company, we strive to deliver a Total Rewards package that will attract, engage and retain the top talent. Elements of the Total Rewards package include competitive base pay and variable compensation opportunities.

Millennium Space Systems also provides eligible employees with an opportunity to enroll in a variety of benefit programs, generally including health insurance, flexible spending accounts, health savings accounts, retirement savings plans, life and disability insurance programs, and a number of programs that provide for both paid and unpaid time away from work.

The specific programs and options available to any given employee may vary depending on eligibility factors such as geographic location, date of hire, and the applicability of collective bargaining agreements.

Pay is based upon candidate experience and qualifications, as well as market and business considerations.

Summary Pay Range:

  • Level 3: $99,000 - $177,000

  • Level 4: $121,000 - $215,000

Millennium is DDTC-registered, ITAR-compliant Company. This position is located at a facility that requires special access. Applicants MUST be U.S. citizens and eligible for a security clearance. Additionally, applicants must be willing to apply for and maintain a security clearance. We encourage all interested candidates to apply for any open position for which they feel they are qualified.

Language Requirements:

Not Applicable

Education:

Bachelor's Degree or Equivalent

Relocation:

Relocation assistance is not a negotiable benefit for this position.

Export Control Requirement:

This position must meet U.S. export control compliance requirements. To meet U.S. export control compliance requirements, a "U.S. Person" as defined by 22 C.F.R. 120.62 is required. "U.S. Person" includes U.S. Citizen, U.S. National, lawful permanent resident, refugee, or asylee.

Safety Sensitive:

This is not a Safety Sensitive Position.

Security Clearance:

This position requires the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. An interim and/or final U.S. Top Secret/SCI Clearance Post-Start is required.

Visa Sponsorship:

Employer will not sponsor applicants for employment visa status.

Contingent Upon Award Program

This position is not contingent upon program award

Shift:

Shift 1 (United States of America)

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