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Iseries Developer Jobs in Illinois (NOW HIRING)

Coilcraft

IBM iSeries System Administrator

Cary, IL · On-site

$60K - $100K/yr

Document system activity and communicate issues to programming or infrastructure teams * Work with ... AS400 / iSeries systems * Direct experience supporting Infor XA / MAPICS ERP * Command-line ...

Coilcraft

IBM iSeries System Administrator

Cary, IL · On-site

$60K - $100K/yr

... programming or infrastructure teamsWork with vendors and internal IT staff to maintain system hardware and softwareWho We're Looking For3+ years of experience operating IBM i / AS400 / iSeries ...

Coilcraft

IBM iSeries System Administrator

Cary, IL · On-site

Document system activity and communicate issues to programming or infrastructure teams * Work with ... AS400 / iSeries systems * Direct experience supporting Infor XA / MAPICS ERP * Command-line ...

ClifyX

ILE COBOL Developer

Chicago, IL · On-site

$51.75 - $70/hr

ClifyX is a company seeking an ILE COBOL Developer with strong development experience in iSeries. The role requires excellent communication skills and a minimum of 7 to 10 years of IT experience.

TRC Talent Solutions

Senior Support Developer

Chicago, IL

$56.25 - $74.25/hr

... identify an IT Systems Developer. This role will support and enhance critical enterprise ... Monitor and support iSeries server operations, including job scheduling, printers, and subsystem ...

New

Droisys

Net Developer

Peoria, IL · On-site

$47.25 - $62.50/hr

Net Developer, Client- Caterpillar Location- Peoria IL, Required Qualifications: 2-4 years C# .Net ... Experience with ETL concepts Experience with nUnit Experience with IBM iSeries (AS/400) Experience ...

Droisys

Net Developer

Peoria, IL

$47.25 - $62.50/hr

Net Developer, Client- Caterpillar Location- Peoria IL, Required Qualifications: • 2-4 years C# ... IBM iSeries (AS/400) • Experience with SFTP -- Thanks/Regards Ruchie Agarwal Desk: 408-874-8333 ...

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 ...

Ensono

Mainframe Security Engineer

Downers Grove, IL · On-site

$80 - $110/hr

Knowledge of REXX or any programming language is a plus. * iSeries security knowledge is a plus. * Experience with Vanguard security products is desired. * Some MVS experience is a plus. * Excellent ...

Ensono

Mainframe Security Engineer

Downers Grove, IL · On-site

Experience with REXX or any programming language is a plus * iSeries security knowledge a plus Technical Skills: * Excellent TSO, JCL, IBM UTILITIES, JES2, and ISPF a must * Experience with CICS ...

blueStone

ASW ERP Analyst

Chicago, IL · On-site

Major Responsibilities The Senior Programmer Analyst will define, develop, test, analyze, and ... IBM iSeries, and IBS ASW, and IBS Enterprise ERP platform Excellent understanding of RPG and SQL ...

Omnicom

Senior Programmer Analyst

Skokie, IL · On-site

$42.50 - $57.50/hr

Experience/Qualifications: * 7+ years working in an IBM i (iSeries/AS400) environment * 7+ years programming and working in RPGIII/IV, RPG Free, CLP, AS/400 Query, FTP, HTML * 5+ years creating SQL ...

Omnicom

Senior Programmer Analyst

Skokie, IL · On-site

$42.50 - $57.50/hr

Experience/Qualifications: * 7+ years working in an IBM i (iSeries/AS400) environment * 7+ years programming and working in RPGIII/IV, RPG Free, CLP, AS/400 Query, FTP, HTML * 5+ years creating SQL ...

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Iseries Developer information

What is an iSeries developer?

iSeries Developers are IT professionals who specialize in developing, maintaining, and supporting applications on IBM’s iSeries platform, also known as AS/400. They use programming languages such as RPG, COBOL, and CL to build business applications that run on the iSeries system. These developers work closely with businesses to ensure their legacy systems remain reliable, efficient, and integrated with modern technologies. They may also be involved in system upgrades, migrations, and troubleshooting to optimize performance.

How does an iSeries developer typically collaborate with other IT teams within an organization?

As an Iseries Developer, collaboration with other IT teams—such as business analysts, QA testers, and network administrators—is a regular part of the job. You'll often work closely with business analysts to understand requirements and translate them into technical solutions on the IBM i platform. Coordination with QA testers ensures thorough validation of code before deployment, while cooperation with system administrators helps maintain optimized performance and security. Strong communication skills and a willingness to participate in cross-functional meetings are key to successfully contributing to complex projects and ongoing system maintenance.

What are the key skills and qualifications needed to thrive as an iSeries developer, and why are they important?

To thrive as an iSeries Developer, you need expertise in RPG, COBOL, or CL programming, a strong understanding of IBM i (AS/400) systems, and typically a degree in computer science or related field. Familiarity with IBM i tools such as IBM Rational Developer, DB2 databases, and source control systems like Aldon or Git is common. Strong problem-solving skills, attention to detail, and effective communication set outstanding developers apart. These skills ensure reliable software development, system maintenance, and seamless collaboration within IT teams.

What is the difference between Iseries Developer vs AS/400 Developer?

AspectIseries DeveloperAS/400 Developer
CredentialsTypically requires RPG, CL, and DB2 certificationsSimilar certifications in RPG, CL, and DB2
Work EnvironmentWorks on IBM i (formerly AS/400) systems, often in enterprise settingsSame as Iseries Developer, focusing on IBM i environments
Industry UsageUsed across finance, manufacturing, and retail sectorsCommonly used in the same industries, often interchangeably
Job Search & ComparisonOften searched alongside AS/400 Developer due to overlapping rolesSame as Iseries Developer in job searches

The terms Iseries Developer and AS/400 Developer are frequently used interchangeably, both referring to professionals who develop and maintain applications on IBM i systems. They share similar certifications, work environments, and industry usage, making them closely related roles in enterprise IT settings.

What are popular job titles related to Iseries Developer jobs in Illinois?

For Iseries Developer jobs in Illinois, the most frequently searched job titles are:

What job categories do people searching Iseries Developer jobs in Illinois look for?

The top searched job categories for Iseries Developer jobs in Illinois are:

Iseries Developer jobs near you
Infographic showing various Iseries Developer job openings in Illinois as of August 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.

IBM iSeries System Administrator

Coilcraft

Cary, IL • On-site

$60K - $100K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 9 days ago

Coilcraft rating

8.3

Company rating: 8.3 out of 10

Based on 9 frontline employees who took The Breakroom Quiz

Job description

Location: Cary, Illinois
Coilcraft, Inc. is a privately held global manufacturing organization headquartered in Cary, Illinois, with a worldwide reputation for high-quality passive electronic components. Our systems support manufacturing, finance, and operations across multiple facilities, and system reliability is critical to our daily business. We are seeking a dependable and detail-oriented IBM iSeries / Infor XA System Operator to manage and monitor our core ERP environment. This role is responsible for maintaining system stability, supporting batch processing, and ensuring backups and nightly operations are completed successfully to keep our manufacturing and business workflows running without interruption.
About the Role and Your Impact
  • Monitor IBM i / AS400 / iSeries systems (QSYSOPR) for messages, errors, and hardware alerts
  • Apply program fixes (PTFs) and perform routine system maintenance
  • Manage job scheduler and monitor active batch jobs
  • Troubleshoot job failures, clear message waits (MSGW), and ensure nightly processing completes on time
  • Provide front-line support for the Infor XA (MAPICS) ERP environment
  • Configure and maintain printer queues, output queues, and environment refreshes
  • Execute and verify daily, weekly, and monthly backups
  • Assist with disaster recovery procedures and media rotation
  • Manage spool files, overlays, and forms/label software
  • Support third-party output tools such as TLA Barcode / TLA Forms
  • Document system activity and communicate issues 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 / iSeries systems
  • Direct experience supporting Infor XA / MAPICS ERP
  • Command-line proficiency (CL, WRKACTJOB, WRKSYSSTS, etc.)
  • Familiarity with DB2 for i and basic SQL queries
  • Understanding of work management concepts, including subsystems, job queues, and memory pools
  • Experience with IBM Power hardware (Power8 / Power9 / Power10 / Power11)
  • Working knowledge of TCP/IP, SMTP, and FTP in IBM i environments
  • Ability to diagnose system, connectivity, and hardware issues
  • Strong documentation and communication skills
Preferred Skills
  • Experience with monitoring software (for example: Halcyon)
  • Experience with replication / HA solutions (for example: iTera)
  • Exposure to RPG programming
  • Experience supporting ERP systems in a manufacturing environment
Why You'll Love Working at Coilcraft
  • Career stability at a privately held company with a 75+ year history
  • Critical role supporting core business and manufacturing systems
  • Work with experienced IT, engineering, and operations teams
  • Hands-on environment with real responsibility
  • Comprehensive benefits including health insurance, 401(k) with match, and profit sharing
Benefits
  • 401(k) Matching
  • Dental Insurance
  • Disability Insurance
  • Employee Assistance Program
  • Flexible Spending Account
  • Health Insurance
  • Health Savings Account
  • Life Insurance
  • Paid Holidays
  • Paid Time Off
  • Profit Sharing
  • Vision Insurance

Equal Opportunity Employer: Disability / Veteran. This position may require compliance with ITAR export regulations; applicants must be U.S. citizens or permanent residents.

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