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Contract Java Microservices Jobs in Illinois (NOW HIRING)

Senior Java Developer

Chicago, IL · On-site

$59 - $75.25/hr

Contract (C2C or W2) Integration Architects places senior engineers on contract engagements with ... Design and develop microservices and REST APIs * Own features end to end, from design through ...

Java Developer

Downers Grove, IL · On-site

$55 - $57/hr

6-12+ Month Contract (project up to 3 years) Location - Downers Grove, IL, Princeton, NJ, or Quincy ... Strong experience with Java, Spring Boot, REST APIs, and microservices. Hands-on experience with ...

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Contract Java Microservices information

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Infographic showing various Contract Java Microservices job openings in Illinois as of August 2026, with employment types broken down into 100% Contract. Highlights an 100% In-person job distribution.

Senior Java Developer

Chicago, IL • On-site

Integration Architects
IT Services • 11 - 50 employees

$59 - $75.25/hr

Other

Posted 11 days ago


Job description

Senior Java Developer
Location: Chicago, IL | Type: Contract (C2C or W2)

Integration Architects places senior engineers on contract engagements with our client companies. We are building a roster of Java talent we can match to client projects as they come up. If you are looking for one permanent seat, this is not it. If you want a steady pipeline of contract work with a firm that markets you and then gets out of your way, keep reading.

You will design and build scalable backend services for our enterprise clients.

What you will do

  • Design and develop microservices and REST APIs
  • Own features end to end, from design through production
  • Optimize performance, scalability, and reliability
  • Integrate with databases, message queues, and third-party systems
  • Mentor on code quality, testing, and architecture

What you bring

  • 12+ years building production Java systems
  • Strong Spring / Spring Boot and microservices experience
  • Solid SQL and relational database design
  • Cloud deployment experience (AWS, Azure, or Google Cloud Platform)
  • Strong testing discipline (JUnit, integration testing) and CI/CD familiarity

How we work

  • You are placed on contract engagements with our clients, not parked in one fixed role
  • We market your profile. When a client need matches, we move fast, and you move fast with us
  • You respond quickly, communicate clearly, and can stand in front of a client without hand-holding
  • Low-drama, self-directed, gets it done. If you need a lot of managing, this is not your spot

Work authorization
Applicants must be currently authorized to work in the United States on a full-time basis. Integration Architects does not provide visa sponsorship now or in the future.

SMS/Text Consent: By applying to this position and providing your phone number, you agree that Integration Architects, Inc. may contact you by phone and text message (SMS) about this and other job opportunities. Consent is not a condition of applying or of employment. Message frequency varies. Message and data rates may apply. Reply STOP to opt out or HELP for help. See our SMS Terms & Privacy Policy: integrationarchitects.com/sms-policy