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As400 Testing Jobs in Texas (NOW HIRING)

McLane Company

JDE Software Engineer II

Temple, TX · Hybrid

This role will be responsible for designing, developing, testing, implementing, and supporting ... The ideal candidate will bring deep experience in RPG development, IBM iSeries/AS400 environments ...

Business Centric Technology

QA Lead

Irving, TX · On-site

$100K - $120K/yr

OMS, WMS, TMS * eCommerce & Digital platforms * iSeries / AS400 * API testing (Postman, SOAP UI) * SQL & database validation * CI/CD and DevOps-enabled testing Apply Today! CP# 8528

Thor, Inc

RPG Developer

Dallas, TX · On-site

... testing and implementation. · Implementing and troubleshooting complex programming changes and ... IBM iSeries / AS400 Qualifications: · Advanced RPG/ILE programming experience. · Practical ...

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How much do as400 testing jobs pay per hour?

As of Sep 9, 2026, the average hourly pay for as400 testing in Texas is $30.30, according to ZipRecruiter salary data. Most workers in this role earn between $16.70 and $41.22 per hour, depending on experience, location, and employer.

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 Texas as of August 2026, with employment types broken down into 93% Full Time, 2% Contract, and 5% Nights. Highlights an 90% In-person, 5% Hybrid, and 5% Remote job distribution, with an average salary of $63,021 per year, or $30.3 per hour.

AS400 Senior Developer -Dallas, TX (Hybrid)

Dallas, TX • On-site

USG, Inc.
Construction Materials Wholesalers • 5 - 10K employees
Learn more about USG, Inc.external

$54.25 - $71.50/hr

Other

Posted 21 days ago

USG rating

8.5

Company rating: 8.5 out of 10

Based on 58 frontline employees who took The Breakroom Quiz

34th of 547 rated manufacturers

Job description

Hi

This is Sudheer from United Software Group Inc. Hope you’re doing great today.

I have an opening for the below requirement. If you’re interested please let me know.

Position:  AS400 Senior Developer

Location: Dallas, TX (Hybrid)- local candidate Only

Duration: long term

Overview:

The AS400 Developer is responsible for the full software development lifecycle of core business applications. This includes analyzing requirements, writing high-quality code, optimizing database performance, and integrating legacy systems with modern web services or APIs.

Key Responsibilities

  • Write Code: Develop and modify application software using RPG III/IV, RPG LE, Free-Form RPG, and Control Language (CL).
  • Manage Databases: Design, maintain, and optimize DB2 for i databases using SQL, DDL, and DDS.
  • Modernize Systems: Convert legacy green-screen applications into modern, web-enabled interfaces or modern RPG architectures.
  • Integrate APIs: Build and consume RESTful web services to connect the AS400 system with external applications.
  • Troubleshoot Issues: Debug complex software anomalies, optimize long-running batch jobs, and resolve production critical errors.
  • Test Code: Conduct thorough unit testing, system integration testing, and support user acceptance testing (UAT).
  • Document Work: Create detailed technical specifications, system workflows, and operational runbooks. [2, 3, 4, 5, 6]

Thanks & Regards

Sudheer

Senior US IT Recruiter

Ph. Direct: Ext 292/

Email: 

Vivid SoftGlobal

HQ: 6000 Venture Dr,

Ste C-D, Dublin, Ohio 43017

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