Sr Mainframe Developer

We are currently seeking an accomplished Senior Platform Developer with specialized expertise in Mainframe development and advanced proficiency in TELON to support the modernization, enhancement, and sustained operation of mission-critical legacy systems. The ideal candidate will play a pivotal role in analyzing existing applications developed using TELON, contributing to the reengineering and transformation efforts, and supporting integration with evolving enterprise infrastructure.
This position requires deep technical knowledge, a methodical approach to legacy system evaluation and enhancement, and the ability to work closely with both business and technical teams in a highly regulated and performance-sensitive environment.
 

Key Responsibilities:
 

Application Development & Enhancement

• Design, code, test, and implement mainframe applications using TELON in conjunction with COBOL, CICS, JCL, and DB2.
• Perform detailed impact analysis for proposed application changes or system enhancements and contribute to solution design and technical specifications.

Legacy System Modernization

• Lead and participate in efforts to modernize TELON-based applications, including transitioning components to more contemporary platforms while preserving business functionality and ensuring backward compatibility.

System Integration & Maintenance

• Develop and maintain efficient interfaces between TELON applications and other internal/external systems.
• Ensure seamless integration and data consistency across legacy and modernized components.

Technical Leadership & Collaboration

• Provide technical guidance, mentoring, and support to junior developers and cross-functional project teams.
• Collaborate with business analysts, project managers, QA teams, and enterprise architects to deliver high-quality solutions aligned with strategic objectives.

Performance Optimization & Support

• Analyze system performance and recommend optimizations to improve application throughput, reliability, and maintainability.
• Provide L3 support for production issues, perform root cause analysis, and implement corrective actions within SLA.

Documentation & Compliance

• Create and maintain comprehensive technical documentation, including design artifacts, program specifications, code walkthrough materials, and operational procedures.
• Ensure compliance with organizational development standards, security protocols, and audit requirements.

Required Skills and Qualifications:

• Minimum of 8 years of progressive experience in mainframe application development and system support.
• Extensive hands-on experience with TELON, including development, debugging, code generation, and maintenance.
• Proficient in COBOL, JCL, CICS, DB2, VSAM, and associated utilities in a z/OS mainframe environment.
• Preferred experience in reverse engineering legacy code and documenting existing architecture.
• Solid understanding of mainframe batch and online processing architecture.
• Demonstrated experience in legacy application modernization, reengineering, and technical migrations.
• Familiarity with structured programming, code optimization, and system tuning principles.
• Strong analytical, problem-solving, and debugging skills with a commitment to quality and continuous improvement.
• Excellent interpersonal and communication skills, with the ability to articulate complex technical concepts to non-technical stakeholders.
• Experience working in Agile, Hybrid, or Waterfall SDLC environments.

Preferred/Beneficial Skills (Not Mandatory):

• Prior experience in TELON-to-COBOL or TELON-to-Java/.NET migration efforts.
• Experience with mainframe DevOps tools such as Endevor, Changeman, Xpediter, File-AID, and Jenkins for z/OS.
• Exposure to enterprise scheduling tools (e.g., Control-M, CA-7).
• Knowledge of cloud integration with mainframe systems or hybrid infrastructure environments.
• Background in industries such as government, finance, insurance, or healthcare, where TELON applications are still prevalent