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Junior Software Developer Java Jobs in San Jose, CA

Mechanize

Junior Software Engineer

San Leandro, CA

Each task is a self-contained software engineering challenge with a prompt, an environment, and an automated grader. You own the full lifecycle: coming up with the idea, implementing the grading ...

Mechanize

Junior Software Engineer

Alameda, CA

$144.23/hr

Each task is a self-contained software engineering challenge with a prompt, an environment, and an automated grader. You own the full lifecycle: coming up with the idea, implementing the grading ...

Mechanize

Junior Software Engineer

Burlingame, CA

Each task is a self-contained software engineering challenge with a prompt, an environment, and an automated grader. You own the full lifecycle: coming up with the idea, implementing the grading ...

Mechanize

Junior Software Engineer

San Leandro, CA

$144.23/hr

Each task is a self-contained software engineering challenge with a prompt, an environment, and an automated grader. You own the full lifecycle: coming up with the idea, implementing the grading ...

Mechanize

Junior Software Engineer

Alameda, CA

Each task is a self-contained software engineering challenge with a prompt, an environment, and an automated grader. You own the full lifecycle: coming up with the idea, implementing the grading ...

Odoo

Junior Software Engineer

Brisbane, CA · On-site

$85K - $105K/yr

About the Job Hybrid (4 days onsite, 1 day remote) - Brisbane, CA As a software engineer at Odoo, you will deliver technical solutions and support to help drive success for our SMB customers across ...

Robert Half

Software Engineer III - ATI

San Ramon, CA · On-site

$64.25 - $86.25/hr

... junior software engineers. * 5+ years of hands-on experience with programming and scripting languages such as Python, Spark, Java, SQL, and Shell Scripting. * 5+ years of experience with cloud ...

Robert Half

Software Engineer III - ATI

San Ramon, CA

$64.25 - $86.25/hr

... junior software engineers. * 5+ years of hands-on experience with programming and scripting languages such as Python, Spark, Java, SQL, and Shell Scripting. * 5+ years of experience with cloud ...

Walmart

Senior Software Developer

San Jose, CA · On-site

$117K - $234K/yr

Our tech stack includes Java for backend services, providing an exciting opportunity for growth and ... Provide technical guidance and mentorship to junior team members to ensure compliance with Walmart ...

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Junior Software Developer Java information

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$71.5K

$125.2K

$188.7K

How much do junior software developer java jobs pay per year?

As of Sep 13, 2026, the average yearly pay for junior software developer java in San Jose, CA is $125,198.00, according to ZipRecruiter salary data. Most workers in this role earn between $88,500.00 and $124,800.00 per year, depending on experience, location, and employer.

What does a junior software developer Java do?

A Junior Software Developer Java is an entry-level programmer who specializes in building, testing, and maintaining software applications using the Java programming language. They typically work under the supervision of senior developers and contribute to coding, debugging, and documentation. Their responsibilities often include fixing bugs, writing unit tests, and collaborating with team members to deliver functional software solutions. This role is ideal for individuals who have a basic understanding of Java and are eager to gain professional experience in software development.

What are the key skills and qualifications needed to thrive as a junior software developer Java, and why are they important?

To thrive as a Junior Software Developer (Java), you need a solid understanding of Java programming, algorithms, and object-oriented principles, often supported by a degree in computer science or related field. Familiarity with development tools like Eclipse or IntelliJ IDEA, version control systems such as Git, and knowledge of build tools like Maven or Gradle is often required. Strong problem-solving abilities, willingness to learn, and effective communication skills help junior developers collaborate and adapt quickly. These skills are crucial for building reliable software, integrating smoothly into development teams, and growing within the role.

What are some common challenges faced by junior software developers working with Java, and how can they overcome them?

Junior Software Developers working with Java often encounter challenges such as understanding complex codebases, managing version control with tools like Git, and applying best practices for clean and efficient code. To overcome these obstacles, it's helpful to actively participate in code reviews, seek guidance from senior developers, and make use of online resources and documentation. Joining stand-up meetings and collaborating closely with teammates can also accelerate learning and help new developers adapt to the team's workflow.

What is the difference between Junior Software Developer Java vs Junior Software Developer Python?

AspectJunior Software Developer JavaJunior Software Developer Python
Required CredentialsBachelor's in CS or related field, Java certifications (optional)Bachelor's in CS or related field, Python certifications (optional)
Work EnvironmentEnterprise applications, backend development, large-scale systemsData analysis, scripting, web development, AI/ML projects
Employer & Industry UsageFinancial services, enterprise software, telecomTech startups, data science firms, research institutions
Common Search & ComparisonYesYes

Both roles typically require a bachelor's degree in computer science or related fields. Java developers often work on enterprise-level applications in industries like finance and telecom, while Python developers focus on data analysis, scripting, and AI projects in startups and research. The choice depends on your career interests and industry focus.

What are popular job titles related to Junior Software Developer Java jobs in San Jose, CA?

For Junior Software Developer Java jobs in San Jose, CA, the most frequently searched job titles are:

What job categories do people searching Junior Software Developer Java jobs in San Jose, CA look for?

The top searched job categories for Junior Software Developer Java jobs in San Jose, CA are:

What cities near San Jose, CA are hiring for Junior Software Developer Java jobs?

Cities near San Jose, CA with the most Junior Software Developer Java job openings:

Junior Software Developer Java jobs near you
Infographic showing various Junior Software Developer Java job openings in San Jose, CA as of August 2026, with employment types broken down into 1% As Needed, 86% Full Time, 9% Part Time, and 4% Contract. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution, with an average salary of $125,198 per year, or $60.2 per hour.

Junior Software Engineer

South San Francisco, CA

Mechanize
See more jobs at Mechanizeexternal

$144.23/hr

Full-time

Medical, Dental, Vision, Life

Re-posted 26 days ago

Job description

About Mechanize

Mechanize builds reinforcement learning environments that frontier AI labs use to train and evaluate their coding models. Learn more at mechanize.work.

Why the work matters

AI models have gotten good at narrow coding tasks but still fail at the complex, judgment-heavy parts of software engineering. We build the environments that expose those failures and help models improve.

What you'll do

You'll design, build, and refine RL tasks. Each task is a self-contained software engineering challenge with a prompt, an environment, and an automated grader. You own the full lifecycle: coming up with the idea, implementing the grading infrastructure, running frontier models against the task, analyzing where and why they fail, and iterating until the task is rigorous and fair.

Coming up with good task ideas requires being clever: finding situations where a frontier model will fail in interesting ways, which means seeing gaps that the model itself doesn't see. You will use coding agents heavily, and a large part of the job is directing them well, evaluating their output, and knowing when they are failing in subtle ways.

What makes someone good at this

Strong technical fundamentals combined with an intuition for AI model behavior. You need to anticipate where a model will take shortcuts, distinguish genuine capability gaps from grader issues, and understand how a model will interpret a prompt. Most engineers significantly underestimate what frontier coding agents can already do; candidates who have spent significant time working with them will have a real head start.

Good fit if you:

  • Have just graduated or are about to graduate

  • Can code in Python

  • Are confident working independently

  • Are motivated by problems that require both technical skill and creative cleverness

  • No prior ML or AI experience required

We're happy to hire candidates who are very capable, even if they have no prior professional software experience.

Probably not a good fit if you:

  • Want a product engineering role building features for end users

  • Prefer a highly collaborative team environment with shared ownership

  • Want extensive structured mentorship

This is independent, high-ownership work. You own your tasks from start to finish, with regular check-ins and feedback. Strong performers are recognized and promoted quickly. Benefits include health, dental, vision, and life insurance. Applying takes less than one minute.

Interview process: https://www.mechanize.work/how-our-interview-process-works

Learn more about the work: https://www.mechanize.work/what-working-here-is-like

About Mechanize. ~20 person team in San Francisco. Backed by Patrick Collison, Nat Friedman, Daniel Gross, Jeff Dean, Dwarkesh Patel, and Sholto Douglas. Featured in the New York Times, the Dwarkesh Podcast and Hard Fork.

Apply