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Junior Java Developer Jobs in Upland, CA (NOW HIRING)

VSolvit

SENIOR FULL STACK DEVELOPER

Norco, CA · On-site

$120K - $180K/yr

NET, PostgreSQL), mentor junior developers, and collaborate with cross-functional teams to deliver analytics-driven platforms. Responsibilities * Design, build, and maintain responsive front-end UIs ...

RAVE Aerospace LLC

Senior Test Engineer

Brea, CA · On-site

$52 - $60/hr

Proven ability to mentor and guide junior and mid-level testers, promoting technical growth and ... Advanced programming skills in scripting or programming languages (e.g., Python, Java) for test ...

RAVE Aerospace LLC

Senior Test Engineer

Brea, CA · On-site

$52 - $60/hr

Proven ability to mentor and guide junior and mid-level testers, promoting technical growth and ... Advanced programming skills in scripting or programming languages (e.g., Python, Java) for test ...

RAVE Aerospace LLC

Senior Test Engineer

Brea, CA

$52 - $60/hr

Proven ability to mentor and guide junior and mid-level testers, promoting technical growth and ... Advanced programming skills in scripting or programming languages (e.g., Python, Java) for test ...

Mercury Insurance Services, LLC

Test Engineer II

Brea, CA · On-site

$74.96K - $138.74K/yr

Provide mentorship to junior team members, offering guidance on test design, execution, and best ... with Java or Python Knowledge and Skills: Familiar with the following: * Adaptability and ...

Danaher

Software Engineer Internships

Pomona, CA

About Software Engineering Roles at Danaher Are you passionate about building real-world ... Writing and debugging code in languages such as C#, Java, Python, or C++ * Participating on an ...

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Junior Java Developer information

See Upland, CA salary details

$62.1K

$108.8K

$164K

How much do junior java developer jobs pay per year?

As of May 30, 2026, the average yearly pay for junior java developer in Upland, CA is $108,802.00, according to ZipRecruiter salary data. Most workers in this role earn between $76,900.00 and $108,500.00 per year, depending on experience, location, and employer.

What Does a Junior Java Developer Do?

Junior Java developers are entry-level programmers who are part of a team of coders and developers. They work on both front-end and back-end codes to build an application. Being a junior Java developer requires extensive knowledge of coding and the program language JavaScript to develop and troubleshoot products. As a junior Java developer, you run tests to pinpoint errors, migrate code and data, and ensure the program is integrated with other company developments.

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

A Junior Java Developer should have a solid understanding of Java programming, object-oriented principles, and basic software development concepts, often supported by a relevant degree or coding bootcamp. Familiarity with tools such as IntelliJ IDEA or Eclipse, version control systems like Git, and frameworks like Spring Boot is typically expected. Strong problem-solving abilities, attention to detail, and effective teamwork are important soft skills in this role. These competencies enable efficient code development, smooth collaboration, and the ability to quickly adapt to new technologies and project requirements.

What are some common challenges a Junior Java Developer might face during their first year, and how can they overcome them?

Junior Java Developers often encounter challenges such as understanding large codebases, adapting to agile development processes, and managing task priorities. To overcome these hurdles, it’s helpful to proactively seek mentorship from senior developers, regularly review documentation, and participate in code reviews. Effective communication with team members also accelerates learning and helps clarify requirements or technical uncertainties. Embracing continuous learning through online resources and hands-on projects will further strengthen your skills and confidence.

What are Junior Java Developers?

Junior Java Developers are entry-level software engineers who specialize in building and maintaining applications using the Java programming language. They typically work under the supervision of more experienced developers and are responsible for writing code, debugging, and participating in code reviews. Their tasks may also include testing software, learning new frameworks, and assisting with the design and implementation of features. Junior Java Developers usually have foundational knowledge of Java and related technologies, and they are eager to develop their skills through hands-on experience.

Will AI replace Java devs?

AI is unlikely to fully replace Java developers, as their role involves complex problem-solving, system design, and understanding business needs that AI cannot fully replicate. Instead, AI tools can assist Java developers by automating repetitive tasks and improving productivity, making their skills more valuable. Continuous learning and adapting to new technologies remain important for Java developers to stay relevant in the evolving tech landscape.

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

AspectJunior Java DeveloperJava Developer
Required Experience0-2 years2+ years
CertificationsOptional, entry-level certificationsOptional, advanced certifications
Work EnvironmentSupportive, learning-focused teamsProject-driven, independent roles
ResponsibilitiesAssist in coding, bug fixing, learning frameworksDesign, develop, maintain Java applications

The main difference between a Junior Java Developer and a Java Developer lies in experience, responsibilities, and independence. Junior Java Developers are typically entry-level, focusing on learning and supporting tasks, while Java Developers have more experience and handle complex development projects independently.

More about Junior Java Developer jobs
What are the most commonly searched types of Java Developer jobs in Upland, CA? The most popular types of Java Developer jobs in Upland, CA are:
What cities near Upland, CA are hiring for Junior Java Developer jobs? Cities near Upland, CA with the most Junior Java Developer job openings:
Junior Java Developer jobs near you
Junior Rangers Leader - Fall After School Program

Junior Rangers Leader - Fall After School Program

Woodcraft Rangers

Moreno Valley, CA • On-site

Part-time

Posted 7 days ago

Woodcraft Rangers rating

7.3

Company rating: 7.3 out of 10

Based on 9 frontline employees who took The Breakroom Quiz

9th of 54 rated activity centers and activity clubs

Job description

Job Title: Junior Rangers Leader
Pay Range: $21.50 - $25.70
Status: Part-time, Non-Exempt
Schedule: 20-25 hours/week; shifts vary by location and may include evenings, weekends, and required trainings.
Reports to: Site Coordinator
Program hours of operation: 8:00 AM – 5:00/6:00 PM (varies per location)
Locations: Moreno Valley Unified School District.  
Are you passionate about giving back to your community and serving youth? Join us!
Who We Are:
In 1922, Woodcraft Rangers opened its doors in Los Angeles and began its mission of guiding young people as they explore pathways to purposeful lives. As a progressive organization, Woodcraft has always been responsive to the evolving needs of the communities served, and is notably inclusive, youth-led, and rooted in the Woodcraft Way, a holistic framework that develops body, mind, spirit, and service. Continuously at the forefront of expanded learning opportunities, Woodcraft Rangers has a rich history of making a significant impact in the greater Los Angeles area, believing that all youth is innately good, deserves the opportunity to realize their full potential, and should be an active participant in defining their own path.   
What We Do:
Woodcraft Rangers provides TK-12 expanded learning programs, including before and after school, specialty enrichment, and summer learning. In the past few years, Woodcraft has expanded its menu of services beyond traditional afterschool programs and summer camps to include early learning, environmental and social justice, college access, and inclusion services for youth with intellectual and developmental disabilities. Additionally, we offer Lifecraft, a college and career advancement program to support the development of approximately 1,500 staff. Today, Woodcraft Rangers serves more than 30,000 youth ages 4 to 18 each year across 160 plus Title I schools in Los Angeles, San Bernardino, and Riverside counties, and continues to expand its reach.
Job Summary:
Junior Rangers Leaders are responsible for ensuring a fun and positive learning environment for TK and Junior Rangers and will support clubs of up to 10 participants. Junior Rangers Leaders have the opportunity to grow, connect, play and have the greatest impact on their participants’ experience. Junior Rangers Leaders are enthusiastic, and love to learn and work with young people in an outdoor setting! Other support members of the team include a Site Coordinator, who oversees the program and a Community Liaison who supports the Site Coordinator. All staff can choose between working in day camps, sleepaway camp, or both.
The Junior Rangers Leader position is an on-site position, including attending training at the Woodcraft Rangers main office in Little Tokyo and school sites.       
Role Overview:
  • Ensure students are always in a safe environment (physical and emotional). Promotes an inclusive, welcoming, and respectful environment that embraces diversity for all program participants, staff, and families.
  • Develops and leads age-appropriate program activities that are FUN, engaging and aligned with whole-child approach (social emotional learning, skill building, self-esteem, leadership, etc.). WR has an activity catalog to support the development of activity plans.
  • Monitors participant attendance and engagement to ensure participants are present and actively engaged in program activities.
  • Build positive relationships with program participants, colleagues, and all stakeholders.
  • Collaborates with colleagues and supervisor to develop culminating activities or events that showcase all participants work and accomplishments.
  • Requests required materials in a timely manner so Site Coordinator can ensure materials are available when needed and within budget.
  • Complies with all applicable safety requirements and emergency protocols, including, up to date on all trainings and required certifications.
  • May be required to attend off-site field trips.
  • Participate in staff development training, as required, approximately 15 hours spread out over multiple weekends/intersessional days throughout the spring.
  • Junior Rangers Leaders are accountable to the Site Coordinator and Program Manager for assigned duties.
  • Other related duties as assigned.

Why work for Woodcraft Rangers:
  • Sick time
  • Lifecraft
  • Upward Mobility
  • Career development
  • The opportunity to create a lasting positive impact on youth within your community.

Ideal Candidate:
Ideally, we are looking for someone who is detail-oriented, energetic, ambitious, proactive, and positive, with the ability to work both independently and collaboratively. Multi-tasking and attention to detail must be strengths this individual possesses. Individuals need to be comfortable to present and speak in front of staff and peers during in-person training.
Requirements:
  • High School Diploma or equivalent
  • FBI & DOJ Livescan clearance
  • TB Test clearance
  • First Aid & CPR certification (provided by WR)
  • Work well with young children and/or youth.
  • Good oral and written communication.
  • Computer literacy and willingness to learn.
  • 6 months experience supervising a group of early education aged children in a school or recreational setting OR 6 units in early education or child development.
  • Must successfully pass an assessment test evaluating skills in math, reading comprehension, and spelling.
  • For ABC Unified School District (Cerritos) Candidates ONLY - 48+ College Units or ABC Unified Paraeducator Test Completion.

Physical Demands:
In compliance with the Americans with Disabilities Act (ADA), the following physical demands may be essential for the effective performance of this position. Reasonable accommodation will be considered to enable individuals with disabilities to perform these essential functions:
While performing the duties of this job, the employee is regularly required to:
  • Frequent standing is required during working hours
  • Regular use of hands for various tasks, such as operating a computer and handling objects, is essential.
  • Frequently required to talk, hear, and reach with hands and arms.
  • Must be able to occasionally lift and/or move up to 40 pounds.

Work Environment:
The work environment characteristics described here are representative of those an employee encounters while performing the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.
While performing the duties of this job, the employee is regularly exposed to a computer monitor. The noise level reflects typical work environment for job description.
Woodcraft Rangers provides equal employment opportunities to all qualified applicants without discrimination with regard to race, religious belief, color, sex, sex stereotype, pregnancy, childbirth or related medical conditions (including breast feeding), age, national origin, ancestry, sexual orientation, gender identification and expression, transgender status, transitioning status, physical or mental disability, medical condition, genetic characteristics, genetic information, family care, marital status, enrollment in any public assistance program, status as military, a veteran or qualified disabled veteran, status as an unpaid intern or volunteer, or any other classification protected by law. We also prohibit discrimination based on the perception that anyone has any of those characteristics or is associated with a person who has or is perceived as having any of those characteristics.
 

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