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As400 Testing Jobs (NOW HIRING)

3B Staffing LLC

AS400/iSeries Engineer

Bend, OR · On-site

Minimum of 5 years' technical iSeries AS400 and data integration experience * Demonstrated moderate ... Experience with testing software such as Testbench * Experience with iSeries 3rd party applications ...

Infosys Limited

AS400 Developer

Plano, TX · On-site

$90 - $135/hr

Maintain detailed records of code, testing techniques, and support activities to enrich the ... Required Skill and Experience AS400 experience. Preferred Skill and Experience * Ability to work in ...

Spar Information Systems

AS400 Developer

Issaquah, WA · On-site

AS400 Developer Issaquah, WA - onsite The opportunity: Analyzes and develops iSeries code that ... Performs code reviews, unit testing, coordinates with development team members on development, and ...

Georgia IT, Inc.

AS/400 Developer

Chicago, IL · On-site

... AS400 tools like SDA, RLU, and PDM. • Write and optimize complex SQL queries for embedded and interactive sessions. • Perform end-to-end unit testing, debug interactive and batch jobs, and ensure ...

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As400 Testing information

What is an AS400 Testing?

An AS400 Testing job involves evaluating applications running on the IBM AS400 (now IBM i) platform to ensure functionality, performance, and security. Testers work with RPG, COBOL, CL, and DB2-based applications, executing test cases, identifying bugs, and validating system outputs. They use manual and automated testing techniques, including unit testing, system testing, and regression testing. The role requires knowledge of AS400 commands, database structures, and business logic implementation.

What are the typical responsibilities and challenges of AS400 Testing?

AS400 Testing professionals are responsible for designing and executing test cases, validating data integrity, and ensuring that business applications on the AS/400 platform run as intended. A common challenge in this role is working with complex legacy code and systems that may lack thorough documentation, which requires testers to be resourceful and detail-oriented. Testers also collaborate closely with developers, business analysts, and end-users to understand requirements, troubleshoot issues, and verify fixes. The work environment often involves both independent analysis and teamwork, and there's ample opportunity to develop expertise in legacy modernization projects or transition into test lead or quality assurance roles.

What are the key skills and qualifications needed for AS400 Testing, and why are they important?

To thrive in AS400 Testing, you need a solid understanding of IBM AS/400 (iSeries) environments, RPG/COBOL programming languages, and knowledge of software testing methodologies. Familiarity with tools such as IBM Rational, Selenium, or other test automation frameworks, along with ISTQB certification, is often beneficial. Strong analytical thinking, problem-solving abilities, and clear communication skills help testers collaborate effectively and report findings. These competencies ensure the delivery of robust, high-quality business applications on legacy systems, minimizing risks and defects.

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As400 Testing jobs near you
Infographic showing various As400 Testing job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 85% Full Time, 10% Part Time, 3% Contract, and 1% Nights. Highlights an 88% Physical, 2% Hybrid, and 10% Remote job distribution.

AS400/iSeries Engineer

Avani Technology Solutions, Inc.

Bend, OR • On-site

Full-time

Re-posted 9 days ago

Job description

MINIMUM EDUCATION & TECHNICAL EXPERIENCE REQUIRED
  • Minimum of 5 years' technical iSeries AS400 and data integration experience
  • Demonstrated moderate breadth/depth of experience and knowledge in all areas involved in solution development and implementation such as coding & development, database & business intelligence
  • IBM iSeries development background using CL, RPG (ILE, Embedded SQL), SQL, OPNQRYF techniques, iSeries Access and Development Tools (PDM, SEU, DBU, RDi, etc.).
  • Experience with change management software such as Implementer
  • Experience with testing software such as Testbench
  • Experience with iSeries 3rd party applications such as ZMOD, Gentran, Acom, Hawkeye, TAATOOLS, Gumbo, Surveyor and LANSA.
  • Experience integrating with modern ERP systems, POS Systems, Data Lakes and Warehouses, MDM systems and WMS.
  • Ability to effectively communicate technical solutions in non-technical terms with business users.
  • Excellent debugging, troubleshooting, analytical, and problem-solving skills.
  • Ability to manage concurrent task assignments of varying priority.

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