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Core Java Jobs in Chicago, IL (NOW HIRING)

Comtech LLC

Java Developer - Lead

Chicago, IL · On-site

Responsibilities : • Excellent knowledge in Core Java (Data Structures, Algorithms, I/O, NIO, Multi-Threading) • Excellent knowledge of Spring Framework (Spring Boot, Spring MVC, Spring ...

SonSoft Inc.

Java Developer with" Elastic Search"

Chicago, IL · On-site

$52.50 - $68/hr

Responsibilities : • Strong J2EE development in enterprise applications • Experience in Core Java, Spring, RESTFul services, SOAP services • Experience in API development, exposing services • ...

SonSoft Inc.

Java + Elastic Search

Chicago, IL · On-site

$59 - $75.25/hr

Responsibilities : • Strong J2EE development in enterprise applications • Experience in Core Java, Spring, RESTFul services, SOAP services • Experience in API development, exposing services • ...

Saxon Global

Technology Lead - Java/J2ee

Northbrook, IL · On-site

Responsibilities : • At least 4 years of experience in Java/J2EE(Core Java, Struts, Spring) Skills • At least 4 years of experience in JavaScript, AngularJS • At least 4 years of experience in ...

PROLIM Global Corporation

Java Developer

Naperville, IL · On-site

$51 - $66/hr

Strong hands-on experience in Core Java (Multithreading| Collections| Streams| JVM tuning). Extensive experience in Microservices architecture and design patterns. Experience with Spring Framework ...

Sonsoft Inc

Core Java/Spring Developer

Chicago, IL · On-site

$52.50 - $68/hr

Company Description SonSoft is an IT Staffing and consulting firm and duly organized under the laws of the Commonwealth of Georgia. We are growing at a steady pace specializing in the fields of ...

Jobsbridge

Java Front End Developer

Chicago, IL · On-site

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Mandatory Skills: 8-10 years of experience in browser based UI development.

Jobsbridge

Java Front End Developer

Chicago, IL · On-site

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Mandatory Skills: 8-10 years of experience in browser based UI development.

Jobsbridge

Java Front End Developer

Chicago, IL · On-site

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Mandatory Skills: 8-10 years of experience in browser based UI development.

Jobsbridge

Java Front End Developer

Chicago, IL · On-site

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Mandatory Skills: 8-10 years of experience in browser based UI development.

ClifyX

Java Production Support - Chicago , IL

Chicago, IL · On-site

$52.50 - $68/hr

Oracle, Spring MVC, Core Java • To provide Production support for applications which involves JAVA technology • To handle project activities prioritized by clients coordination with offshore team ...

Jobsbridge

Java Front End Developer

Chicago, IL · On-site

Be it core Java, full-stack Java, Web/UI designers, Big Data or Cloud or Mobility developers/architects, we have them all. Minimum 6 years of experience in Java development is REQUIRED Minimum 3 ...

Apex Informatics

Java Developer

Chicago, IL · On-site

$52.50 - $68/hr

Core Java Developer Work Location: Chicago, IL (Hybrid Role) Must have skills: AWS, Microservices, testing, Amazon RDS or DynamoDB Roles: 1. ** Application Development: ** Design, code, test, and ...

Comtech, LLC

Java Developer - Lead

Chicago, IL · On-site

Excellent knowledge in Core Java (Data Structures, Algorithms, I/O, NIO, Multi-Threading ) * Excellent knowledge of Spring Framework (Spring Boot, Spring MVC, Spring Integration & Spring batch are ...

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All JobsCore Java JobsCore Java Jobs in Chicago, IL

Core Java information

See Chicago, IL salary details

$40

$61

$84

How much do core java jobs pay per hour?

As of Sep 14, 2026, the average hourly pay for core java in Chicago, IL is $61.73, according to ZipRecruiter salary data. Most workers in this role earn between $52.02 and $69.33 per hour, depending on experience, location, and employer.

What is a Core Java developer?

Core Java developers are software professionals who specialize in building applications using the fundamental features and libraries of the Java programming language. They focus on core concepts such as object-oriented programming, data structures, multithreading, exception handling, and the Java API. Core Java is the foundation for other Java technologies like Java EE, and developers in this role often create desktop, server-side, or foundational components of larger systems. Their expertise is critical in ensuring robust, scalable, and maintainable Java applications.

What skills and qualifications are needed to thrive as a Core Java developer?

To thrive as a Core Java Developer, you need strong proficiency in Java programming, object-oriented principles, data structures, and a relevant degree in computer science or a related field. Familiarity with tools such as Eclipse or IntelliJ IDEA, version control systems like Git, and frameworks like Spring is typically required, along with certifications such as Oracle Certified Professional Java Programmer (OCPJP) being advantageous. Excellent problem-solving abilities, attention to detail, and effective communication skills help set standout developers apart. These skills ensure robust, maintainable code and efficient collaboration within software development teams.

What challenges do Core Java developers face when working on large-scale enterprise applications?

Core Java developers working on large-scale enterprise applications often encounter challenges such as managing complex codebases, ensuring thread safety in concurrent environments, and optimizing application performance. They may also need to integrate with legacy systems and maintain code readability for long-term support. Collaborating effectively with cross-functional teams, including QA, DevOps, and business analysts, is essential to meet project goals and maintain high software quality.

What is the difference between Core Java vs Java Developer?

AspectCore JavaJava Developer
FocusFundamental Java programming, core APIs, basic application developmentBuilding, testing, and maintaining Java applications, including web and enterprise solutions
SkillsJava syntax, OOP principles, basic APIsCore Java, frameworks (Spring, Hibernate), web technologies
Work EnvironmentLearning and understanding Java fundamentalsDeveloping full applications, debugging, deployment

Core Java refers to the fundamental Java programming language and its core APIs, essential for understanding Java basics. Java Developer, on the other hand, applies these fundamentals to develop complete applications, often using frameworks and additional tools. While Core Java is foundational, Java Developers build on this knowledge to create real-world software solutions.

Are Core Java jobs still in demand?

Core Java jobs remain in demand across various industries such as finance, healthcare, and technology, especially for roles involving backend development, Android app development, and enterprise applications. Proficiency in Java, along with knowledge of frameworks like Spring and tools such as Maven, enhances employability in this field.

Can I get a job with Core Java?

Core Java is a fundamental skill for many software development roles, especially in backend and enterprise applications. Proficiency in Java programming, understanding of object-oriented principles, and familiarity with development tools like IDEs and version control are essential for securing such jobs.

What jobs can I get with Core Java?

Core Java skills are essential for roles such as Java Developer, Software Engineer, Backend Developer, and Application Programmer. These positions typically involve developing, maintaining, and testing Java-based applications, often requiring knowledge of frameworks like Spring or Hibernate and familiarity with object-oriented programming concepts.

What are popular job titles related to Core Java jobs in Chicago, IL?

For Core Java jobs in Chicago, IL, the most frequently searched job titles are:

What job categories do people searching Core Java jobs in Chicago, IL look for?

The top searched job categories for Core Java jobs in Chicago, IL are:

Core Java jobs near you
Infographic showing various Core Java job openings in Chicago, IL as of September 2026, with employment types broken down into 1% Internship, 1% As Needed, 81% Full Time, 15% Part Time, and 2% Contract. Highlights an 91% Physical, 2% Hybrid, and 7% Remote job distribution, with an average salary of $128,395 per year, or $61.7 per hour.

Java Developer with PL/SQL Chicago IL Contract

Chicago, IL • On-site

AceStack LLC
Recruiting and Staffing Services • 51 - 200 employees
Learn more about AceStack LLCexternal

$52.50 - $68/hr

Full-time

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

Job description

Job Title: Java Developer with PL/SQL

Location: Onsite - Chicago, IL

Job Type: Contract (C2C/W2)

Job Summary: We are seeking a skilled Java Developer with strong PL/SQL experience to join our team for a contract-based, onsite role in Chicago, IL. The ideal candidate should have hands-on expertise in developing enterprise-level applications using Core Java, Spring Boot, and integrating with Oracle PL/SQL.

Key Responsibilities:

  • Design, develop, and maintain scalable Java applications.
  • Write and optimize complex PL/SQL queries, procedures, and packages.
  • Integrate Java applications with Oracle databases.
  • Perform code reviews, unit testing, and debugging.
  • Collaborate with cross-functional teams including QA, Business Analysts, and Project Managers.
  • Troubleshoot and resolve production issues.
  • Ensure best practices in coding, testing, and deployment.

Required Skills:

  • 9-12+ years of experience in Java development.
  • Strong expertise in Core Java, Spring Boot, REST APIs.
  • Hands-on experience with Oracle PL/SQL - procedures, triggers, packages.
  • Good understanding of SQL performance tuning and data modeling.
  • Experience with Azure Cloud is required
  • Experience with version control systems (Git, Bitbucket).
  • Experience in Agile/Scrum environments.
  • Familiarity with CI/CD tools like Jenkins or Bamboo.
  • Strong analytical and problem-solving skills.
  • Excellent communication and interpersonal skills.
AceStack logo

About AceStack

Sourced by ZipRecruiter

AceStack is a global IT consulting & Staffing agency. We deal in Health care (Nursing, Allied, Clinical/Non-clinical) Staffing, Engineering Staffing & I.T. Staffing. Founded in 2017 in New Jersey, AceStack has reported consistent growth and profit every year and carries zero debt. AceStack consultants are placed across USA, Canada, Mexico, and Asia. In addition to our headquarters in New Jersey – USA, we also have offices in Canada, Noida, and Ahmedabad. AceStack’s exceptionally high-touch service keeps our clients satisfied and our Consultants/Travelers engaged. We believe in investing in our Consultants/Clients in a variety of ways. We employ AceStack ambassador who helps guide Consultants through the on-boarding process and ensure the transition into their new role with our Client is seamless. We also have dedicated Consultant care representatives located throughout our organization who provide the same level of attention throughout our Consultant’s tenure. Due to this level of attention and care, AceStack enjoys not only one of the highest retention rates in the staffing industry but also one of the highest redeployment rates in the industry.

Industry

Recruiting and staffing services

Company size

51 - 200 Employees

Headquarters location

NJ, US

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