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Mid Level Software Engineer Jobs in California (NOW HIRING)

We are hiring for both Mid-Level and Senior-Level positions. Software Engineers research, design, and develop computer and network software or specialized utility programs. You may also perform the ...

Mentor junior and mid-level software engineers by sharing best practices in embedded development, performing design and code reviews, and guiding problem solving. Lead architectural discussions and ...

Immediately Keyword's: #Baltimorejobs; #Engineer Software2 Our customer is seeking a versatile mid-level software developer (5+ years of professional experience) to join their defense-focused ...

Sr Software Engineer

Los Gatos, CA · On-site

$142K - $188K/yr

Provide technical leadership and mentorship to junior and mid-level software engineers. * Influence technical direction and contribute to engineering standards, processes, and best practices.

Sr Software Engineer

Los Gatos, CA

$142K - $188K/yr

Provide technical leadership and mentorship to junior and mid-level software engineers. * Influence technical direction and contribute to engineering standards, processes, and best practices.

Embedded Software Engineer

San Diego, CA · On-site

$139K - $183K/yr

Mid Level (5-8 yrs exp.) Experience required: 3 Years Education level: Bachelor's degree We're looking for an embedded software engineer to design and deliver security-focused features for encrypted ...

... mid-level engineers while driving independent progress on complex, ambiguous technical problems ... software engineering experience • Deep proficiency in C++ and/or Python, including language ...

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Mid Level Software Engineer information

See California salary details

$62.7K

$145.6K

$202.8K

How much do mid level software engineer jobs pay per year?

As of Jul 17, 2026, the average yearly pay for mid level software engineer in California is $145,592.00, according to ZipRecruiter salary data. Most workers in this role earn between $118,400.00 and $170,700.00 per year, depending on experience, location, and employer.

What is a Mid Level Software Engineer job?

A Mid Level Software Engineer is a professional with a few years of experience who develops, tests, and maintains software applications. They work independently on tasks, contribute to code reviews, and collaborate with teams to design and implement solutions. Mid-level engineers are expected to write clean, efficient code, troubleshoot issues, and improve system performance. They may also mentor junior developers and participate in architectural discussions. Typically, they have strong problem-solving skills and proficiency in programming languages relevant to their role.

What typical responsibilities can I expect as a Mid Level Software Engineer?

As a Mid Level Software Engineer, you will be involved in designing, coding, testing, and maintaining software applications, often working on both new and existing projects. You’ll collaborate with other engineers, product managers, and QA teams to deliver features that meet business requirements, while also participating in code reviews and contributing to architectural decisions. Your responsibilities may also include troubleshooting bugs, refining development processes, and occasionally mentoring junior engineers. This role typically offers a blend of technical challenge, teamwork, and opportunities for continued skill development.

What are the key skills and qualifications needed to thrive in the Mid Level Software Engineer position, and why are they important?

To thrive as a Mid Level Software Engineer, you need a solid understanding of software development principles, programming languages such as Java, Python, or C#, and a bachelor’s degree in computer science or a related field. Experience with version control systems like Git, familiarity with agile methodologies, and sometimes certifications such as AWS Certified Developer or Microsoft Certified: Azure Developer Associate are advantageous. Strong problem-solving skills, teamwork, and effective communication are standout soft skills in this position. These combined skills enable engineers to deliver high-quality code, collaborate efficiently within development teams, and adapt to evolving project requirements.

What are the most commonly searched types of Software Engineer jobs in California? The most popular types of Software Engineer jobs in California are:
What job categories do people searching Mid Level Software Engineer jobs in California look for? The top searched job categories for Mid Level Software Engineer jobs in California are:
What cities in California are hiring for Mid Level Software Engineer jobs? Cities in California with the most Mid Level Software Engineer job openings:
Infographic showing various Mid Level Software Engineer job openings in California as of July 2026, with employment types broken down into 1% Locum Tenens, 91% Full Time, 4% Part Time, 1% Temporary, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $145,592 per year, or $70 per hour.
Spacecraft Software Engineer (Associate or Mid-Level)- Millennium Space Systems

Spacecraft Software Engineer (Associate or Mid-Level)- Millennium Space Systems

Boeing

El Segundo, CA

Full-time

Medical, Life, Retirement

Re-posted 20 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 Software Engineer (Associate or Mid-Level)- 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.

Millennium Space Systems (MSS) has an exciting opportunity for a Spacecraft Software Engineer (Level 2 or Level 3) to join our team in El Segundo, CA!

Job Summary:

As a Spacecraft Software Engineer (Associate or Mid-Level) at Millennium Space Systems, you'll create the software that makes our satellites function in orbit. Your code will run on our custom avionics, process signals from sensors like our star trackers, and command actuators like the propulsion system. Your software may also interface with custom payloads and perform high-level autonomy functions to ensure our spacecraft accomplish their missions. We are looking for software engineers that can lead a small team developing the for a satellite, work with other teams to determine what the software needs to do, and then write (and test!) robust embedded C/C++ to meet those requirements. And when that code is running in space, you'll continue to support mission operations with software updates and enhancements. This position's internal job code is Software Engineer - Embedded. Our team is currently hiring for Levels 2-3.

Strong communication and organizational skills are critical to success in this position, along with the ability to build strong relationships, collaborate in a cross-functional environment, and utilize problem-solving skills to proactively identify and manage risks and opportunities.

Position Responsibilities:

  • Work collaboratively with hardware, control and system engineers to define and develop software requirements, architectures and designs suited for fault-tolerant spacecraft

  • Rapidly prototype novel software solutions to prove out the architecture/design concepts, quantify technical risk, and create new capabilities

  • Implement designs in C/C++, integrate software components, create and run unit tests, validate on Hardware-in-the-Loop and release real-time embedded solutions

  • Assist with system verification and qualification, assessing the outputs and documenting the results to ensure software products that meet system requirements and mission-critical standards

  • Be responsible for all phases of software development and problem resolution from program inception to post-launch support

  • Work with hardware engineers to verify hardware-hardware and hardware-software interfaces

  • Break down the software development needed for a program into smaller discrete tasks that can be given to others to implement and monitor their progress

  • Perform code reviews to ensure the software being developed is functionally correct, efficient, and meets our coding standards

This position is expected to be 100% onsite. The selected candidate will be required to work onsite at one of the listed location options.

Basic Qualifications (Required Skills/Experience):

  • 1+ years' experience in software or hardware engineering, requirements, design, development, test, and working with software and hardware

  • 1+ years of experience working with Linux

  • 1+ years of experience in C and C++ programming

  • Experienced in embedded environment and/or bare metal C on a microcontroller

  • 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 Clearance Post-Start is required.

Preferred Qualifications (Desired Skills/Experience):

  • Bachelor's degree or higher in Electrical Engineering, Computer Engineering or Computer Science

  • 3+ years of experience in C and C++ programming

  • Experience with concurrent HW/SW development

  • Experience with iterative and/or agile development processes

  • Experience with serial data protocols (HDLC, I2C, SPI)

  • Experience in Python programming

  • Experience in Verilog and FPGAs

  • Experience with git, JIRA, confluence

  • Knowledge of satellite systems and components

  • Level 2: 1 or more years' related work experience or an equivalent combination of education and experience

  • Level 3: 3 or more years' related work experience or an equivalent combination of education and experience

Relocation assistance is not a negotiable benefit for this position. Candidates must live in the immediate area or relocate at their own expense.

Shift: This position is for 1st shift. Occasionally, second shift coverage (3:30pm-1:00am) is needed to support vehicle test and integration operations, with this supporting effort distributed across the team.

Drug Free Workplace:

Boeing is a Drug Free Workplace 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 2: $106,250-$143,750

Level 3: $135,150-$182,850

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. Secret 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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Boeing is an Equal Opportunity Employer. Employment decisions are made without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, physical or mental disability, genetic factors, military/veteran status or other characteristics protected by law.

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