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As400 Testing Jobs in Texas (NOW HIRING)

VDart, Inc.

AS400 Senior Developer

Dallas, TX · On-site

$54.25 - $71.50/hr

AS400 Senior Developer Location: Dallas, TX (Hybrid) Type: Contract * We are looking for a top ... Conduct thorough unit testing, system integration testing, and support user acceptance testing (UAT)

New

Infosys Limited Digital

AS400 Developer

Plano, TX · On-site

... AS400 hardware setup Technical Skills 3 Technology|Database|MySQL Technical Skills 4 Technology ... code, testing techniques, and support activities to enrich the knowledge base and assist other ...

Technogen, Inc.

Senior AS400 Developer

Dallas, TX · On-site

$54.25 - $71.50/hr

Senior AS400 Developer Location: Dallas, TX Duration: Long term Location: Dallas, TX (local ... Conduct thorough unit testing, system integration testing, and support user acceptance testing (UAT)

Infosys

AS400 Developer

Plano, TX · On-site

... of code, testing techniques, and support activities to enrich the knowledge base and assist other similar projects Your contribution to the team: • A collaborative spirit and excellent ...

Stevenstransport

IT Senior Developer

Dallas, TX

$54 - $71.25/hr

Designing, coding/developingand performing acceptance testing of all new and existing integrations ... AS400 * RPGLE, RPG Free * RDi * SQL * DB2 * Trouble shooting * Design * Project Management Work ...

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 ...

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How much do as400 testing jobs pay per hour?

As of Aug 19, 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

VDart, Inc.

Dallas, TX • On-site

$54.25 - $71.50/hr

Other

Posted 2 days ago

New

Job description

Title: AS400 Senior Developer

Location: Dallas, TX (Hybrid)

Type: Contract

  • We are looking for a top-quality candidate who can contribute to a critical project and confidently manage direct stakeholder interactions.
  • Please do additional diligence and assessment beyond traditional sourcing methods before submitting any candidate profiles. We are looking for exceptional talent with proven capability and reliability.

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]

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