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Junior Full Stack Software Engineer Jobs in California

The Role We're looking for a Full-Stack Software Generalist who enjoys working across the entire ... Help shape engineering culture, processes, and technical standards Qualifications * 2-5 years of ...

Viasat is a global leader in communication technology, seeking a Full-Stack Software Engineer to join their Government - Secure Network Systems team. This role involves developing and maintaining ...

FULL STACK SOFTWARE ENGINEER (STARLINK) At SpaceX we're leveraging our experience in building rockets and spacecraft to deploy Starlink, the world's most advanced broadband internet system. Starlink ...

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Junior Full Stack Software Engineer information

See California salary details

$43.9K

$133K

$188K

How much do junior full stack software engineer jobs pay per year?

As of Jun 12, 2026, the average yearly pay for junior full stack software engineer in California is $133,006.00, according to ZipRecruiter salary data. Most workers in this role earn between $109,500.00 and $155,900.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Junior Full Stack Software Engineer, and why are they important?

To thrive as a Junior Full Stack Software Engineer, you need a solid grasp of programming fundamentals, web development (HTML, CSS, JavaScript), and basic knowledge of both front-end and back-end frameworks, often supported by a relevant degree or coding bootcamp. Familiarity with tools like Git, databases (SQL/NoSQL), and frameworks such as React or Node.js is commonly expected. Problem-solving, effective communication, and eagerness to learn are standout soft skills in this role. These skills and qualities are crucial for building, maintaining, and improving software applications while collaborating efficiently with team members.

What are some typical challenges a Junior Full Stack Software Engineer faces when working on cross-functional teams?

As a Junior Full Stack Software Engineer, you may encounter challenges such as balancing front-end and back-end development tasks, quickly learning new frameworks or technologies used by the team, and effectively communicating with designers, QA testers, and senior engineers. Navigating different coding standards and adapting to the team's workflow can also be initially overwhelming. However, these challenges offer valuable learning opportunities, and most teams provide mentorship and code reviews to support your growth.

What are Junior Full Stack Software Engineers?

Junior Full Stack Software Engineers are entry-level professionals who develop both the front-end and back-end components of web applications. They work with a variety of programming languages, frameworks, and tools to build, maintain, and improve websites or web services. Typically, junior engineers work under the guidance of more experienced developers and contribute to coding, debugging, and testing software features. Their role often involves learning new technologies and best practices while collaborating with team members to deliver functional software solutions.
What are the most commonly searched types of Full Stack Software Engineer jobs in California? The most popular types of Full Stack Software Engineer jobs in California are:
What cities in California are hiring for Junior Full Stack Software Engineer jobs? Cities in California with the most Junior Full Stack Software Engineer job openings:
Infographic showing various Junior Full Stack Software Engineer job openings in California as of June 2026, with employment types broken down into 55% Full Time, 32% Part Time, 12% Contract, and 1% Nights. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution, with an average salary of $133,006 per year, or $63.9 per hour.

Senior Full Stack Software Engineer

Monitise

Sunnyvale, CA โ€ข On-site

Full-time

Medical, Dental, Vision, Life, Retirement

Posted 21 days ago


Job description

Calling all innovators - find your future at Fiserv.

We're Fiserv, a global leader in Fintech and payments, and we move money and information in a way that moves the world. We connect financial institutions, corporations, merchants and consumers to one another millions of times a day - quickly, reliably, and securely. Any time you swipe your credit card, pay through a mobile app, or withdraw money from the bank, we're involved. If you want to make an impact on a global scale, come make a difference at Fiserv.

Job Title

Senior Full Stack Software Engineer

What does a successful Fullstack Engineer do at Clover?

In this role, you will be an experienced engineer helping to improve and expand our platform and product. You will accomplish this by maintaining and adding new features, investigating/resolving bugs, creating helpful documentation, and re-architecting our system to achieve better scalability and availability.

As part of the loyalty program team, you will be responsible for building applications that define the user experience on the Clover Dashboard. Partnering with Infrastructure, Product, and Design teams, you will be pragmatic in balancing priorities and enjoy working in an iterative model where specifications are constantly evolving. You will own your services from development through deployment, mentor junior talent, and help drive the technical roadmap for products that support over 700k merchants worldwide.

What you will do:

  • Architect, design, and develop web-based front-end and microservices backend applications mainly using Java, Javascript, Typescript, React and Python
  • Evaluate and recommend modern frameworks, technologies, and tools, and execute the corresponding processes.
  • Design, implement, and maintain REST APIs for devices and web clients including our web dashboard, devices, mobile apps and 3rd party apps
  • Identify technical requirements in product meetings and assist the business team with realistic project planning and feature development; translate product requirements into functional, maintainable, extensible software that is in-line with company objectives
  • Promote effective use of AIpowered software engineering and productivity tools (e.g., AI coding assistants, test generation, code review, documentation, and incident analysis tools) to improve developer efficiency and code quality.
  • Own your services/features from development through deployment and production monitoring
  • Participate in design/code reviews.
  • Partner with the Infrastructure Team to design data models that support large-scale highly available services
  • Work with QA to develop test plans/strategies
  • Participate in a regular on call and release management rotation
  • Collaborate with cross-functional, distributed agile teams with the flexibility to work across time zones.
  • Architect, build, and maintain robust, scalable, reliable, highly available, and performant applications.
  • Coach and mentor engineers to deliver efficient, extensible solutions and improve their technical and leadership skills.
  • Advocate engineering best practices by actively engaging and leveraging agile methods and a CI/CD DevOps mindset.
  • Triage bugs and their impact on product or service operations and quality, focusing on customer centricity
  • Prioritize and multi-task between projects with the ability to handle changing priorities.
  • Help to define the vision, strategy, and own, and drive the software technical roadmap.
  • Excellent team player with strong empathy and critical thinking skills.

What you will need to have:

  • Degree in Computer Science or Engineering field or related experience
  • 7+ years of software development experience, preferably Full Stack.
  • Experience using and championing AIbased software engineering and productivity tools (e.g., AI coding assistants, automated testing, code quality analysis, documentation generation, or operational intelligence tools) to accelerate delivery and improve quality
  • Strong coding skills; Java is our first choice of primary language
  • Experience with Spring Boot for building microservices
  • Professional experience with React and TypeScript
  • Strong knowledge of relational databases (e.g., MySQL) and document databases (e.g., MongoDB).

What would be great to have:

  • Familiarity with Google Cloud Pub/Sub, K8, Lambda run, LLM prompting techniques, Kotlin and Python
  • Previous experience in the payments or fintech industry
  • Background in re-architecting systems for high availability and scalability

How you'll work:

  • This role is on-site Monday through Friday. Fiserv considers in-person collaboration to be an essential part of this role as in-person office experiences help you with your overall onboarding experience and leads to stronger productivity.
  • This role requires use of a computer and audio equipment.

Benefits at Fiserv:

  • Fuel Your Life program to support your physical, financial, social, and emotional well-being
  • Paid holidays and generous time away policies
  • No-cost mental health support through Employee Assistance Programs
  • Living Proof program to recognize your peers' extra effort with points redeemable for rewards
  • Eight Employee Resource Groups to foster a collaborative culture and expand your network
  • Unparalleled professional growth with training, development, and internal mobility opportunities
  • Medical, dental, vision, life, and disability insurance options available from day one
  • Retirement planning and discounted shares with the Employee Stock Purchase Plan
  • Tuition assistance and reimbursement program
  • Paid parental, caregiver, and military leave

#LI-SH2

Salary Range

$140,000.00 - $210,000.00

These pay ranges apply to employees in Sunnyvale, California. Pay ranges for employees in other states may differ.

It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

For incentive eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards in the Company's sole discretion.

Thank you for considering employment with Fiserv. Please:

  • Apply using your legal name
  • Complete the step-by-step profile and attach your resume (either is acceptable, both are preferable).

Our commitment to Equal Opportunity:

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law.

If you have a disability and require a reasonable accommodation in completing a job application or otherwise participating in the overall hiring process, please contactAskHR.US@fiserv.com. Please note our AskHR representatives do not have visibility to your application status. Current associates who require a workplace accommodation should refer to Fiserv's Disability Accommodation Policy for additional information.

Note to agencies:

Fiserv does not accept resume submissions from agencies outside of existing agreements.Please do not send resumes to Fiserv associates. Fiserv is not responsible for any fees associated with unsolicited resume submissions.

Warning about fake job posts:

Please be aware of fraudulent job postings that are not affiliated with Fiserv. Fraudulent job postings may be used by cyber criminals to target your personally identifiable information and/or to steal money or financial information. Any communications from a Fiserv representative will come from a legitimate Fiserv email address.