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As400 Developer Jobs in Chicago, IL (NOW HIRING)

ConfigUSA

AS400 Synon Sr Developer

Schaumburg, IL · Remote

Job Title AS400 Synon Sr Developer Relevant Experience (in Yrs) 15+ yrs Technical/Functional Skills • Strong functional knowledge of core PBM functions specifically core adjudication, pricing ...

Sarian, Inc.

AS400 Synon Engineer

Schaumburg, IL · On-site +1

AS400 Synon Engineer Must Have Technical/Functional Skills iSeries, SYNON, COBOL, AS400 (Mid-Range), ILE, COBOL/400, CLLE, SQL • Strong functional knowledge of core PBM functions specifically core ...

Tachyon Technologies

AS/400 Developer

Chicago, IL · On-site

Work on AS400 with expertise in I5250 and Presto for inventory and order fulfillment. * Utilize modern RPG techniques including RPG, RPGLE , and Embedded SQL . * Design and develop applications using ...

New

DMS Pharmaceutical Group, Inc.

Be Seen First

Programmer AS400

Park Ridge, IL · On-site

The Programmer will design, develop, maintain and support corporate software applications and EDI programs on the IBM iSeries (AS/400) using RPG/LE, SQL and CL. The Programmer will be responsible for ...

DMS Pharmaceutical Group, Inc.

Be Seen First

Programmer AS400

Park Ridge, IL · On-site

The Programmer will design, develop, maintain and support corporate software applications and EDI programs on the IBM iSeries (AS/400) using RPG/LE, SQL and CL. The Programmer will be responsible for ...

THK AMERICA INC

Sales Administration Rep

Schaumburg, IL

$21.64 - $29.47/hr

Request pricing (and/or) approval drawings for customers using AS400 system and create quotes for customers by using the quotation database on Lotus Notes * Assist DM/ Engineers to enter in AS400 ...

THK AMERICA INC

Sales Administration Rep

Schaumburg, IL · On-site

$21.64 - $29.47/hr

Request pricing (and/or) approval drawings for customers using AS400 system and create quotes for customers by using the quotation database on Lotus Notes * Assist DM/ Engineers to enter in AS400 ...

Coilcraft

IBM iSeries System Administrator

Cary, IL · On-site

$60K - $100K/yr

... to programming or infrastructure teams * Work with vendors and internal IT staff to maintain system hardware and software Who We're Looking For * 3+ years of experience operating IBM i / AS400 ...

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All JobsAs400 Developer JobsAs400 Developer Jobs in Chicago, IL

As400 Developer information

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How much do as400 developer jobs pay per hour?

As of Jul 31, 2026, the average hourly pay for as400 developer in Chicago, IL is $56.60, according to ZipRecruiter salary data. Most workers in this role earn between $51.78 and $60.24 per hour, depending on experience, location, and employer.

What does a typical day look like for an AS400 Developer?

A typical day for an AS400 Developer involves writing, testing, and troubleshooting code in RPG, COBOL, or CL for business-critical applications running on IBM iSeries systems. Developers often work closely with business analysts, system administrators, and other IT professionals to gather requirements, implement system enhancements, and ensure data integrity within DB2 databases. Daily tasks may also include resolving production issues, performing regular maintenance, and participating in code reviews or deployment planning. Collaborative work and clear communication are common, as developers typically play an integral role in supporting both legacy and modernized business processes.

What is an AS400 developer?

An AS400 developer is a software professional who specializes in creating, maintaining, and modifying applications on the IBM iSeries (AS/400) platform. They typically work with languages like RPG, COBOL, and CL programming, and may also handle database management and system integration tasks within a mainframe or enterprise environment.

What are the key skills and qualifications needed to thrive in the As400 Developer position, and why are they important?

To thrive as an AS400 Developer, you need strong skills in RPG, COBOL, or CL programming languages, knowledge of IBM iSeries/AS400 systems, and typically a degree in computer science or related field. Familiarity with DB2 databases, SQL, and tools like Turnover or Aldon for change management and version control is highly valued, and certifications in IBM technologies are beneficial. Strong problem-solving abilities, attention to detail, and effective communication help developers collaborate with cross-functional teams and resolve technical issues efficiently. These competencies ensure reliable business application support, seamless integration with enterprise systems, and success in maintaining legacy environments.

What coding language does AS400 use?

AS400, now known as IBM i, primarily uses the RPG (Report Program Generator) language for application development. It also supports COBOL, CL (Control Language), and SQL for database management and scripting tasks, making it a versatile environment for developers working on enterprise systems.

What is an AS400 Developer job?

An AS400 Developer is responsible for designing, developing, and maintaining applications on IBM's AS400 (now IBM i) platform. They typically use programming languages like RPG, CL, and SQL to create and manage business applications. Their role involves debugging programs, optimizing performance, and ensuring software meets business requirements. AS400 Developers often collaborate with IT teams to integrate AS400 systems with modern applications.

How much does an AS400 developer make in the US?

An AS400 developer in the US typically earns between $70,000 and $110,000 annually, depending on experience, location, and certifications. Skilled developers with expertise in RPG, CL, and IBM i environments tend to command higher salaries, especially in industries relying heavily on legacy systems.

Is AS400 still used?

AS400, also known as IBM iSeries, is still used in many organizations for legacy business applications, especially in industries like finance and manufacturing. AS400 developers maintain and update these systems, often working with tools like RPG and CL, and the platform continues to receive updates and support from IBM.
What are the most commonly searched types of As400 Developer jobs in Chicago, IL? The most popular types of As400 Developer jobs in Chicago, IL are:
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As400 Developer jobs near you
Infographic showing various As400 Developer job openings in Chicago, IL as of July 2026, with employment types broken down into 83% Full Time, and 17% Contract. Highlights an 83% In-person, and 17% Remote job distribution, with an average salary of $117,735 per year, or $56.6 per hour.

AS400 Synon Sr Developer

ConfigUSA

Schaumburg, IL • Remote

Contractor

Re-posted 28 days ago

Job description

Job Title AS400 Synon Sr Developer
Relevant Experience
(in Yrs) 15+ yrs
Technical/Functional Skills • Strong functional knowledge of core PBM functions specifically core adjudication, pricing, accumulators, MED D Pricing, benefit plan, patient pay and regulations
• 15+ years of hands-on coding experience in CA/2E (Synon) including programming, array handling, commit control
• 8+ years of hands-on coding experience in COBOL AS400 and/or Cobol ILE
• Experience working with ACMS/MOM
• Strong exposure to DB2400
Must have Skills - iSeries, SYNON, COBOL, AS400 (Mid-Range), ILE, COBOL/400, CLLE, SQL
Experience Required Yes
Roles & Responsibilities
• Analyze and understand the functional and technical requirements.
• Work with business and capability teams to discuss and refine the requirements.
• Ability to guide the team and do hands-on development.
• Partner with team members to build robust, efficient, effective solutions.
• Identify opportunities to fine-tune and optimize applications.
• Participate in Agile/Scrum development process.
• Lead team in an onshore/offshore model
• Work in a team focused on continuous integration, improvement and learning
• Contribute to developing the technology roadmap for the team both functionally and technically
• Experience of coordinating with the client for requirement clarification and solution discussions
Generic Managerial Skills Required
Education Bachelor’s Degree
Master’s is a plus