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AS/400 Developer

Square Hiring

 

Houston, TX, USA

Posted On: Just posted
Experience: 12+ years
Availability: Onsite
Openings: 1
Category: AS/400 Developer
Tenure: Contract - Corp-to-Corp
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Description

Develop, maintain, and enhance business applications on the IBM AS400 (IBM i) platform, bridging legacy systems with modern architectures.

This role is on-site.

Responsibilities

  • Architect and build scalable, mission-critical systems using ILE technologies and IBM DB2.
  • Refactor legacy code, optimize performance, and ensure production stability through rigorous tuning.
  • Integrate IBM MQ and XML workflows, including SSIS-based messaging, within hybrid environments.
  • Translate business requirements into functional specifications and high-quality production code.
  • Collaborate with stakeholders and technical teams to deliver iterative, reliable software solutions.

Required Skills

  • 12+ years of AS400/iSeries application development, support, and enhancement.
  • 8+ years of COBOL, RPGLE, CLLE, and QS36 within ILE architecture.
  • 8+ years of IBM DB2 expertise, including SQL, stored procedures, and query optimization.
  • 8+ years of ILE modernization and AS400 performance optimization experience.
  • 3+ years of IBM Liberty (WebSphere) and WebSphere integration in hybrid architectures.
  • Advanced Unix/Linux proficiency for scripting, job control, and cross-platform support.
  • Bachelor's degree in Computer Science or related field.

Preferred Skills

  • Experience with test-driven development practices.
  • Proven ability to work independently in fast-moving environments.

Education

Bachelor's degree

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