Cards Mainframe Developer

We are looking for an experienced Mainframe Developer with strong expertise in COBOL, JCL, DB2, VSAM, and Unix Shell Scripting. The ideal candidate will be responsible for developing, supporting, and optimizing mainframe applications; building automation scripts; managing backend integration workflows; and ensuring reliability across production and batch systems. This role requires strong technical skills, problem‑solving capabilities, and the ability to work effectively with cross‑functional teams.

• Develop, enhance, and maintain applications using COBOL, JCL, VSAM, and DB2.
• Troubleshoot, debug, and resolve mainframe application issues across development, testing, and production environments.
• Optimize JCL, COBOL programs, and DB2 queries to improve system performance and efficiency.
• Support daily batch processing; ensure job success and resolve job abends promptly.
• Develop and maintain Unix/Linux shell scripts for automation, batch scheduling, and system integration.
• Ensure seamless integration between Unix‑based automation and mainframe backend systems.
• Troubleshoot and enhance existing scripts, improving stability and execution performance.
• Develop and maintain PL/SQL procedures, functions, packages, and triggers.
• Perform SQL tuning and optimize database queries for performance.
• Integrate shell scripts with relational databases such as Oracle, DB2, and MySQL.
• Monitor scheduled jobs, resolve production incidents, and ensure overall batch stability.
• Conduct root‑cause analysis (RCA) and implement permanent fixes.
• Enhance performance of scripts, jobs, and database queries through continuous tuning.
• Work closely with stakeholders to gather requirements and translate them into scalable solutions.
• Participate in Agile ceremonies and collaborate with QA, business, and support teams.
• Create and maintain technical documentation, including design specifications, support guides, and system documentation.

• Strong hands‑on experience in mainframe technologies: COBOL, JCL, VSAM, DB2.
• Solid expertise in Unix/Linux shell scripting.
• Strong SQL and PL/SQL skills (procedures, functions, triggers, packages).
• Experience integrating shell scripts with relational databases.
• Strong debugging, analytical, and problem‑solving skills.
• Good understanding of batch processing and automation workflows.
• Ability to work independently and collaboratively within a team.

• Experience in banking, cards, or financial services domains.
• Experience with ticketing tools and production support processes.
• Familiarity with Git, CICD pipelines, or Dev Ops practices.
• Knowledge of Python or Java for extended automation or backend integrations.
• Additional mainframe skills such as CICS, IMS, and system administration on DB2/CICS/IMS.
• REXX scripting for automation and migration tasks.
• Strong troubleshooting skills for IBM mainframe product related issues.

The pay range that the employer in good faith reasonably expects to pay for this position is $24.96/hour - $39.01/hour.

Our benefits include medical, dental, vision and retirement benefits.

Applications will be accepted on an ongoing basis.

Tundra Technical Solutions is among North America’s leading providers of Staffing and Consulting Services. We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic. Qualified applicants with arrest or conviction records will be considered for employment in accordance with applicable law, including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act.

Unincorporated LA County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: client‑provided property, including hardware (both of which may include data) entrusted to you from theft, loss or damage; return all portable client computer hardware in your possession (including the data contained therein) upon completion of the assignment, and maintain the confidentiality of client proprietary, confidential, or non‑public information.

In addition, job duties require access to secure and protected client information technology systems and related data security obligations.