Priyanka .

Product Engineer

Dallas, Texas, United States2 yrs 8 mos experience

Highly Stable

Key Highlights

Expert in COBOL and DB2 with 7 years experience.
Led successful legacy modernization initiatives.
Proven track record in high-volume transaction processing.

Stackforce AI infers this person is a Mainframe Developer specializing in Fintech and Telecom systems.

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Skills

Core Skills

Mainframe DevelopmentLegacy ModernizationCore Banking Systems

Other Skills

COBOLDB2CICSSQLREST APIsSpring BootJCLVSAMAssemblerGitHubPowershellAzure DevOps ServicesContinuous Integration and Continuous Delivery (CI/CD)Google Cloud Platform (GCP)Amazon CloudWatch

About

Results-driven Senior Mainframe Developer with around 7 years of experience designing, enhancing, and modernizing high-volume enterprise applications on IBM z/OS. Strong expertise in COBOL, DB2, CICS, IMS, JCL, and VSAM, supporting core banking, telecom, and financial transaction systems processing millions of daily transactions. Proven experience in legacy modernization initiatives including IMS-to-DB2 and IDMS-to-DB2 migrations, API enablement using z/OS Connect REST services, and integration with distributed platforms (Java/Spring Boot). Skilled in performance tuning, SQL optimization, batch window reduction, CICS region management, and production incident resolution (ABEND analysis). Hands-on experience across full SDLC including technical design, impact analysis, DevOps-based source control, release management, and L2/L3 production support. Adept at collaborating with cross-functional teams to deliver scalable, secure, and regulatory-compliant financial systems.

Experience

2 yrs 8 mos

Total Experience

2 yrs 8 mos

Average Tenure

Current Experience

Verizon

Mainframe Modernisation Developer

May 2024 – Present · 2 yrs 1 mo · Texas, United States · Remote

● Designed and developed high-volume COBOL-DB2 batch and CICS online applications on z/OS, supporting wireless subscriber billing, usage rating modules processing 3M+ daily transactions with sub-second response SLAs.
● Led legacy modernization initiatives migrating IMS DB/DC and IDMS components to DB2 for z/OS, performing PSB/DBD analysis, DL/I call mapping and hierarchical-to-relational schema transformation for telecom customer and billing data.
● Architected relational DB2 schema redesign, defining indexing strategies and optimizing access paths using EXPLAIN plans, reducing batch CPU consumption by 28% for large-scale subscriber billing and usage processing workloads.
● Developed and deployed DB2 Native REST APIs using z/OS Connect EE, implementing JSON schema mapping, RACF-based security, and TLS encryption to expose service management services securely to distributed systems.
● Built and integrated Spring Boot microservices (Java) to consume mainframe REST endpoints, enabling real-time subscriber account inquiry, plan validation, and billing adjustment services across distributed web and mobile platforms.
● Performed advanced SQL performance tuning, optimizing cursor logic, commit frequency, and eliminating table scans using RUNSTATS, REORG, and index reorganization strategies for high-volume telecom usage and billing tables.
● Refactored legacy monolithic COBOL programs into modular, reusable components using copybooks and subprograms, improving maintainability and enabling API-based integration with telecom CRM and digital channels.
● Developed CICS transactions using COMMAREA, Channels & Containers, and implemented Syncpoint control, TSQ/TDQ, ensuring transactional integrity in real-time subscriber provisioning and billing validation workflows.

COBOLDB2CICSSQLREST APIsSpring Boot+3

Pnc

Mainframe Developer

Jan 2022 – May 2024 · 2 yrs 4 mos · Texas, United States · On-site

● Designed, developed, and maintained high-volume COBOL-DB2 batch and CICS online applications on IBM z/OS, supporting enterprise Core Banking modules including Deposits, Payments, Credit Cards, Customer Information, and Fraud Monitoring, processing 4M+ daily financial transactions.
● Engineered and optimized complex JCL-driven batch workflows for end-of-day settlement, transaction posting, interest accrual, reconciliation, and statement generation, implementing Checkpoint-Restart logic and GDG versioning, reducing batch window by 22%.
● Developed high-performance CICS transactions using COMMAREA, Channels & Containers, TSQ/TDQ, and Syncpoint control, ensuring sub-second response times for real-time account inquiry and payment posting across branch and digital channels.
● Designed and tuned DB2 for z/OS tables, indexes, and stored procedures; analyzed EXPLAIN plans, optimized access paths, resolved locking/deadlock issues, and leveraged RUNSTATS, REORG, and BIND packages to enhance performance and reduce CPU utilization by 18%.
● Managed and reorganized VSAM (KSDS/ESDS) clusters, optimizing CI/CA sizes, eliminating CI splits, and improving sequential/random file access performance for high-volume payment systems.
● Supported and enhanced IMS DB/DC (MPP & BMP) programs, analyzing DL/I calls (GU, GN, REPL, ISRT) and optimizing SSA logic to improve hierarchical data retrieval efficiency.
● Diagnosed and resolved complex production ABENDs (S0C7, S0C4, S0C1, Uxxxx) using Abend-AID, dump analysis, and job log tracing, restoring critical banking services within SLA and implementing permanent corrective solutions.
● Improved system performance by tuning SORT utilities, restructuring COBOL file I/O logic, optimizing commit frequency, and reducing batch CPU and elapsed time during high-volume settlement cycles.

COBOLDB2CICSJCLVSAMCore Banking Systems+1

Usaa

Mainframe Developer

Apr 2019 – Dec 2021 · 2 yrs 8 mos · India · On-site

● Designed, developed, and enhanced enterprise COBOL applications across high-volume transaction processing systems on IBM z/OS, supporting financial modules integrated with DB2, IDMS, and VSAM datasets.
● Developed and maintained CICS online programs and BMS maps (SDF2) using COMMAREA-based communication, enabling secure and responsive user interactions for real-time transaction processing.
● Built and executed structured JCL batch job streams, incorporating CA11 restart logic, dataset allocation, and utility execution to support reliable nightly and periodic batch cycles.
● Designed and optimized DB2 for z/OS tables, stored procedures, triggers, and SQL queries, using SPUFI and QMF for validation and performance analysis.
● Developed applications interacting with VSAM (KSDS/ESDS) files, performing dataset reorganization using IDCAMS to improve file access efficiency and minimize CI/CA splits.
● Created and maintained custom Assembler macros and low-level modules, performing memory addressing, register manipulation, and system-level optimizations to enhance resource utilization in computationally intensive applications.
● Performed CICS performance monitoring and tuning, analyzing region statistics, DB2 resource usage, and VSAM I/O performance to improve online transaction response times.
● Utilized IBM utilities (DFSORT, ICETOOL, DB2 Load/Unload) to support data transformation, archival, and migration activities within batch processing frameworks.
● Diagnosed and resolved production ABENDs (S0C7, S0C4, S0C1, Uxxxx) using Abend-AID, Xpeditor, and File-Aid, ensuring minimal downtime and rapid incident resolution.
● Supported integration with MQ Series for message-based communication between distributed and mainframe systems.
● Managed code promotion and version control through ChangeMan, following structured change management and release governance processes.