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Junior Java Developer Intern Jobs in New Jersey (NOW HIRING)

Citigroup Inc.

AVP Senior Java Developer

Rutherford, NJ · On-site

$121.20 - $181.80/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Java developer is responsible for participation in the establishment and implementation of ... Provide technical leadership and guidance to junior development engineers. * Mentor team members on ...

Citigroup, Inc.

AVP Senior Java Developer

Rutherford, NJ · On-site

$58.25 - $74.50/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

  • PTO

Senior Java developer is responsible for participation in the establishment and implementation of ... Provide technical leadership and guidance to junior Dev engineers. * Mentor team members on best ...

Bizoforce Inc

Java Full Stack Developer

Jersey City, NJ · On-site

$54.75 - $70.75/hr

Role: Java Full Stack Developer Work Location: Columbus, OH | Jersey City, NJ (Day 1 On-Site ... Mentor junior developers. * Ensure adherence to security and coding standards. * Collaborate with ...

Damco Solutions

Java fullstack Developer

Whippany, NJ · On-site

$53 - $68.50/hr

... junior developers, and enforce engineering standards. • Write extensive unit, integration, and functional tests (JUnit, Mockito, Jest). • Ensure code security, resiliency, and compliance with ...

Damco Solutions

Java fullstack Snr Developer

Whippany, NJ · On-site

$53 - $68.50/hr

... junior developers, and enforce engineering standards. • Write extensive unit, integration, and functional tests (JUnit, Mockito, Jest). • Ensure code security, resiliency, and compliance with ...

Real Soft, Inc.

Senior Java Full Stack Developer

Iselin, NJ · On-site

$53.25 - $68.75/hr

Providing technical coaching, code reviews, and mentorship to junior and mid-level developers ... Strong Java and Spring Framework development experience, with a minimum of 5 years of hands-on ...

CYNET SYSTEMS

Java Full Stack Developer

Whippany, NJ · On-site

$65 - $70/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Provide technical guidance and mentorship to junior developers. * Support CI/CD pipeline ... Java. * RESTful APIs. * Microservices. * SDLC. * System Design. * Architecture. * Unit Testing.

CYNET SYSTEMS

Java Full Stack Developer

Whippany, NJ · On-site

$65 - $70/hr

  • Medical

  • Dental

  • Vision

  • Life

  • Retirement

Provide technical guidance and mentorship to junior developers. Support CI/CD pipeline ... Skills: Java. RESTful APIs. Microservices. SDLC. System Design. Architecture. Unit Testing.

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Junior Java Developer Intern information

What does a Junior Java Developer Intern do?

A Junior Java Developer Intern assists in the development, testing, and maintenance of Java-based applications under the supervision of senior developers. Their responsibilities typically include writing simple code, debugging software, participating in team meetings, and learning best practices in software development. The intern gains hands-on experience with Java technologies, tools, and frameworks while contributing to real-world projects. This role is designed to help interns build foundational programming skills and understand the software development lifecycle.

What types of projects and tasks can I expect to work on as a Junior Java Developer Intern?

As a Junior Java Developer Intern, you can expect to assist in developing, testing, and debugging Java applications under the guidance of senior team members. Your daily tasks may include writing code, fixing bugs, participating in code reviews, and collaborating with other developers and departments such as QA or DevOps. Interns often get exposure to real-world projects that contribute to the organization's products or services, providing valuable experience with tools like version control systems and agile methodologies. This hands-on involvement is designed to help you build both technical and teamwork skills in a professional setting.

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

To thrive as a Junior Java Developer Intern, you need a solid understanding of Java programming, basic knowledge of object-oriented design, and a relevant degree or coursework in computer science or software engineering. Familiarity with IDEs like Eclipse or IntelliJ IDEA, version control systems such as Git, and introductory experience with build tools like Maven is typical. Strong problem-solving, eagerness to learn, and effective communication skills help interns collaborate and adapt in a team environment. These skills and qualities are important because they enable rapid learning, effective contribution to projects, and smooth integration into development teams.

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

AspectJunior Java Developer InternJunior Java Developer
Required CredentialsBasic understanding of Java, coursework, or related internship experienceProven Java skills, possibly some certifications or coursework completed
Work EnvironmentInternship programs, learning-focused, entry-level projectsFull-time role, more responsibility, involved in ongoing projects
Employer & Industry UsageInternship positions in tech companies, startups, or software firmsEntry-level full-time positions in similar industries
Search & Comparison IntentUnderstanding internship differences, entry-level opportunitiesCareer progression, job responsibilities, skill requirements

The main difference between a Junior Java Developer Intern and a Junior Java Developer lies in experience and responsibilities. Interns are typically students or recent graduates gaining practical experience, while Junior Developers are full-time employees with more responsibilities and ongoing projects. Internships serve as a stepping stone toward a full developer role, which requires more skills and commitment.

What are popular job titles related to Junior Java Developer Intern jobs in New Jersey?

For Junior Java Developer Intern jobs in New Jersey, the most frequently searched job titles are:

What job categories do people searching Junior Java Developer Intern jobs in New Jersey look for?

The top searched job categories for Junior Java Developer Intern jobs in New Jersey are:

What cities in New Jersey are hiring for Junior Java Developer Intern jobs?

Cities in New Jersey with the most Junior Java Developer Intern job openings:

Junior Java Developer Intern jobs near you
Infographic showing various Junior Java Developer Intern job openings in New Jersey as of August 2026, with employment types broken down into 84% Full Time, 3% Part Time, and 13% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Java developer with Spark

QUANTUM TECHNOLOGIES LLC

Berkeley Heights, NJ • On-site

$53.25 - $69/hr

Other

This job post has expired today. Applications are no longer accepted.

Job description

Job Title:Java developer with Spark

Location: Berkley Heights, NJ

Duration: 12+ Months

Bill Rate: $120k

Job Type: W-2 Contract

Client: To Be Discussed Later

Work Authorization:
USC
GC
H-1B
OPT-EAD
GC-EAD
-EAD

Job Summary

Responsibilities:

Architect and build scalable, fault-tolerant data pipelines using Apache Spark (Java)

Lead design of batch and streaming ETL/ELT systems handling large data volumes

Deep-dive performance tuning: partitioning strategy, memory management, shuffle/skew optimization, job cost reduction

Set coding standards and lead code/design reviews across the team

Drive technical decisions on data architecture, storage formats, and pipeline orchestration

Mentor mid-level and junior engineers; act as a technical escalation point

Partner with product, analytics, and platform teams to translate requirements into scalable systems

Own production reliability on-call ownership, incident response, root-cause analysis for pipeline failures

Evaluate and introduce new tools/frameworks where they improve the system

Contribute to capacity planning and cost optimization for cluster infrastructure

Required Qualifications

Bachelor s or master s degree in computer science, Engineering, or related field

7+ years of professional Java development experience

5+ years hands-on experience with Apache Spark in production environments

Expert-level understanding of distributed systems: fault tolerance, data locality, shuffle mechanics, resource management

Proven track record designing systems processing terabyte+ scale data

Strong SQL skills and deep familiarity with columnar storage formats (Parquet, ORC, Avro, Delta Lake/Iceberg)

Experience with cluster managers (YARN, Kubernetes) and cloud-managed Spark

Proficiency with Kafka

Strong grasp of CI/CD, containerization, and infrastructure-as-code practices

Preferred Qualifications

Experience with Flink or other stream-processing frameworks

Familiarity with data governance, lineage, and quality frameworks

Experience with workflow orchestration at scale

Background in system design for multi-tenant or multi-region data platforms

Prior experience leading a team or acting as a technical lead

Soft Skills / Leadership

Excellent communication able to explain technical tradeoffs to non-technical stakeholders

Strong mentorship and coaching ability

Comfortable driving ambiguous, cross-team technical initiatives

Note: We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.

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