Senior Developer, COBOL Mainframe

Minsait

Senior COBOL Mainframe Developer maintaining critical legacy systems at Minsait, focusing on troubleshooting and operational stability.

Posted 5/7/2026full-timeSão Paulo • 🇧🇷 BrazilSeniorWebsite

About the role

Key responsibilities & impact

Work in a legacy Mainframe environment, focusing on support, development and integration of critical transactional services.
Operate and monitor online transaction dashboards in a Mainframe environment.
Analyze and resolve abends/transactional failures.
Perform quick assessments and diagnostics on COBOL programs to identify root causes and execution parameters.
Implement maintenance and changes in COBOL/DB2 programs.
Make adjustments and perform analysis on JCLs (steps, DDs, parameters, datasets, conditionals and return codes).
Identify and handle ASRA, CICS and BBEL abends.
Execute changes following change management processes, when applicable.
Support development, operations and business teams with technical analysis and troubleshooting.
Record evidence and actions taken, ensuring traceability of activities.
Participate in a support rotation, including availability on weekends.

Requirements

What you’ll need

Strong experience in an Online Mainframe environment.
Advanced experience with COBOL, CICS and DB2.
Knowledge of JCL and job handling.
Experience analyzing and handling ASRA, CICS and BBEL abends.
Experience in corrective and evolutionary maintenance of critical legacy systems.
Strong troubleshooting and technical investigation skills.
Experience monitoring online transactions.
Senior profile with technical autonomy and hands-on approach.
Availability to work in a rotation and on weekends.
Minimum of 5 years of experience in the role.

Benefits

Comp & perks

Company-subsidized Health Plan for the employee.
Option to include dependents in the Health Plan with payroll-deduction for the cost.
Dental Assistance (optional).
Option to include dependents in the Dental Assistance Plan with payroll-deduction for the cost.
Meal Voucher or Food Voucher.
Transportation Voucher (optional).
Impact & Care - Personal Guidance Program that provides emotional support and confidential counseling in psychological, legal, financial, social and pet-related areas at no cost for the employee and legal dependents.
Gympass - Wellhub (Access to more than 700 gyms across Brazil with plans starting at R$ 29.90, payroll-deducted).
Option to include dependents in Gympass - Wellhub (up to 3 dependents - paid via credit card).
Access to Udemy via our intranet.
Partnerships with major consumer brands.
Agreement with SESC for the employee and dependents.
Discount agreements with educational institutions (undergraduate and postgraduate) and language/certification schools.
Group life insurance.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

COBOLCICSDB2JCLtransaction analysisabends handlinglegacy systems maintenancetechnical troubleshootingdiagnosticschange management

Soft Skills

technical autonomyhands-on approachproblem-solvingcommunicationteam collaborationavailability for rotationadaptabilityattention to detailanalytical thinkingtime management