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On Call Java Back End Developer Jobs in Chicago, IL

1 point system

Java Developer

Riverwoods, IL · On-site

$53 - $68.50/hr

This role centers on building and optimizing high‑performance backend services and cloud‑based ... Engineer or Backend Engineer. * Strong proficiency in Java 21, Spring Boot, RESTful APIs, and ...

SYSTEGRATION INC

Sr. Backend Java Developer

Chicago, IL · On-site

$124K - $161K/yr

We are helping our Direct Client (Fortune 100 company) to look for Top Notch/Expert Sr. Backend Java Developer for 100% Onsite Multi-Year Contract role in Chicago Downtown, Immediate Start! Client ...

SYSTEGRATION INC

Sr. Backend Java Developer

Chicago, IL · On-site

$124K - $161K/yr

We are helping our Direct Client (Fortune 100 company) to look for Top Notch/Expert Sr. Backend Java Developer for 100% Onsite Multi-Year Contract role in Chicago Downtown, Immediate Start! Client ...

Worldpay, Inc.

Senior Backend Engineer

Chicago, IL · Hybrid

As a Lead Software Engineer with strong back-end expertise, you'll start your day aligning with ... Your focus will be on driving Java and Spring Boot-based services, APIs, and integrations that ...

FIS

Senior Backend Engineer

Chicago, IL · Hybrid

As a Lead Software Engineer with strong back-end expertise, you'll start your day aligning with ... Your focus will be on driving Java and Spring Boot-based services, APIs, and integrations that ...

Addison Group

Java Developer

Chicago, IL · On-site

$50 - $55/hr

Java Developer Industry: Information Technology / Software Development Location (City, State ... Develop and maintain backend applications utilizing Java and Spring Boot. * Design, build, and ...

Resource 1

Java Developer

Chicago, IL · On-site

$52.50 - $68/hr

Resource 1 is in need of a Java Developer for a long-term contract. This is hybrid/ remote, so ... and back-end (SQL). Individual should have experience with full life-cycle development, from ...

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 ... Identify and address performance bottlenecks in both front-end and back-end components, ensuring ...

Apex Informatics

Java Developer

Chicago, IL · On-site

$52.50 - $68/hr

Identify and address performance bottlenecks in both front-end and back-end components, ensuring ... other developers to translate requirements into technical solutions. Participate in agile ...

Laksan Technologies

Java Fullstack Developer

Chicago, IL · On-site

$54 - $69.75/hr

Java Fullstack Developer Location: Chicago, Illinois Job Type: C2C Onsite Long-term We are looking ... The ideal candidate will have strong expertise in Java-based back-end development and React-based ...

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Showing results 21-40

All JobsOn Call Java Back End Developer JobsOn Call Java Back End Developer Jobs in Chicago, IL

On Call Java Back End Developer information

See Chicago, IL salary details

$16

$58

$79

How much do on call java back end developer jobs pay per hour?

As of Aug 20, 2026, the average hourly pay for on call java back end developer in Chicago, IL is $58.41, according to ZipRecruiter salary data. Most workers in this role earn between $50.53 and $65.38 per hour, depending on experience, location, and employer.

What is the difference between On Call Java Back End Developer vs Java Software Engineer?

AspectOn Call Java Back End DeveloperJava Software Engineer
Primary RoleProvides on-demand backend support, troubleshooting, and quick fixes for Java applicationsDesigns, develops, and maintains Java-based software solutions
Work EnvironmentOften on-call, reactive, and support-focusedDevelopment-focused, project-oriented
Required SkillsJava, troubleshooting, problem-solving, quick responseJava, software design, coding, testing
CertificationsJava certifications beneficialJava certifications beneficial

While both roles require Java expertise and similar certifications, the On Call Java Back End Developer primarily handles urgent support and troubleshooting tasks, often working outside regular hours. In contrast, the Java Software Engineer focuses on designing and developing Java applications in a proactive manner. The roles differ mainly in their focus—reactive support versus proactive development—though they share core Java skills and certifications.

What are the most commonly searched types of Java Back End Developer jobs in Chicago, IL?

The most popular types of Java Back End Developer jobs in Chicago, IL are:

On Call Java Back End Developer jobs near you

Java Developer

1 point system

Riverwoods, IL • On-site

$53 - $68.50/hr

Contractor

Re-posted 7 days ago

Job description

Job Description:

Overview

Financial systems demand reliability, scale, and precision. This role centers on building and optimizing high‑performance backend services and cloud‑based data processing pipelines that support critical financial operations. You’ll work across Java/Spring microservices, AWS EMR/Spark workloads, and a mature testing culture (TDD/BDD) to deliver secure, resilient, and compliant software.

Key Responsibilities

  • Design and develop enterprise‑grade backend services using Java 21, Spring Boot, and microservice patterns.
  • Build and optimize distributed data processing pipelines leveraging AWS EMR, Apache Spark, and related cloud-native services.
  • Implement automated testing frameworks using TDD, BDD, JUnit, Cucumber, and mocking libraries.
  • Collaborate with cross-functional teams (cloud engineering, data engineering, architecture, QA, and product) to deliver secure, compliant financial systems.
  • Enhance system reliability through observability, logging, metrics, and performance tuning.
  • Participate in code reviews, architectural discussions, and continuous improvement initiatives.
  • Ensure adherence to financial‑industry standards for security, auditability, and operational excellence.

 

Required Qualifications

  • 5–7+ years professional experience as a Software Engineer or Backend Engineer.
  • Strong proficiency in Java 21, Spring Boot, RESTful APIs, and microservices.
  • Hands-on experience with AWS, including EMR, Spark, S3, Lambda, CloudWatch, or related services.
  • Solid understanding of distributed systems, parallel processing, and data pipeline design.
  • Demonstrated experience with TDD, BDD, Cucumber, and automated testing frameworks.
  • Experience working in regulated environments or large-scale enterprise systems.
  • Familiarity with CI/CD pipelines, Git, Jenkins, GitLab, or similar tooling.

 

Preferred Qualifications

  • Experience in financial services, fintech, risk systems, or high‑throughput transaction platforms.
  • Knowledge of Kafka, Kinesis, or other streaming technologies.
  • Exposure to DevOps practices, infrastructure-as-code, or containerization (Docker, Kubernetes).
  • Understanding of domain-driven design (DDD) and event-driven architectures.
  • Performance tuning experience for low-latency, high-volume systems.