Custom Application Architect

We are:  The Advanced Technology Centers (ATCs) are the engine for reinvention in our clients' transformation journey. Powered by more than 255,000 people across 24 countries, ATCs provide our clients with seamless access to industry insights and innovative technology solutions.
Stronger together!  The Advanced Technology Centers (ATCs) make a tremendous impact in solving our clients' business problems by leveraging innovation, intelligence, industry insights, new IT, and new technology skills. With the global environment changing at a faster pace, our clients are facing unprecedented challenges, and they need us more than ever before. As a Network, ATCs are positioned to unlock greater opportunities and exponential value for our clients.
The value for our clients and our people:  For our clients, the Network provides the strength of our geographic diversity, greater resilience, and seamless access to the deepest industry knowledge, the latest in Gen AI solutions, and tech expertise from around the world.
For our people, it brings an opportunity to shape truly boundaryless career paths in a highly collaborative team of experts where they can learn from each other and solve the world's most complex client challenges.
You Are  An experienced Mainframe Developer with a strong background in COBOL, JCL, DB2, CICS, and VSAM, ideally within Canadian retail banking or retail investments. You bring strong analytical and troubleshooting skills, hands-on mainframe expertise, and experience supporting complex, business-critical applications.

Key Responsibilities   Design, develop, test, and maintain applications using COBOL, JCL, DB2, and CICS
Build and optimize batch processing for account processing, interest calculation, fee assessment, investment transactions, income distributions, and tax slip generation (T3, T5, T4

RSP/RIF, NR4)
Develop online transactions and interfaces for branch, advice, digital, and call-centre channels
Convert functional specifications into technical designs, and perform impact analysis and code reviews
Troubleshoot production incidents including abends, data issues, and batch delays; participate in on-call support
Support integration with distributed systems via MQ, APIs, and z/OS Connect
Deploy changes using change and release management tools, following SDLC and ITIL processes
Maintain technical documentation, runbooks, and operational procedures
Adhere to security, audit, and regulatory controls, including data privacy and segregation of duties
This role requires a minimum of 3 days per week of on-site presence in Mississauga.
Here’s What You Need   Atleast 5-10+ years of hands-on mainframe development experience, with strong exposure to Canadian retail banking and/or retail investments
You bring strong proficiency in COBOL, JCL, DB2 (including SQL and performance tuning), CICS, and VSAM
You bring experience working with DFSORT/SYNCSORT, REXX, and enterprise scheduling tools such as CA-7, Control-M, or TWS
You bring hands-on experience using debugging and data analysis tools such as Xpediter, Abend-AID, File-AID, and Fault Analyzer
You bring experience developing and maintaining COBOL programs and copybooks in IDz, including use of the z/OS Connect toolkit to map OpenAPI JSON schemas to backend data structures such as COMMAREA and containers
You bring experience integrating z/OS Connect adapters with CICS, IMS, and Db2 subsystems, and using IDz interactive tools to debug and trace API execution on z/OS
You should bring experience with source code and release management tools such as Endevor, Change Man, or Git-based platforms
You bring a strong understanding of batch processing windows, SLAs, restart/recovery design, and data reconciliation
You bring strong analytical thinking, problem-solving, and troubleshooting skills
Bachelor's degree in Computer Science, Computer Systems Engineering, Software Engineering, or a closely related field
Bonus points if:
You bring experience working with a major Canadian bank, investment dealer, or fund company
You should bring knowledge of retail investment processing, including mutual fund trades, Fundserv messaging, registered plan contributions and withdrawals, withholding tax, and year-end slips
You bring exposure to IMS, PL/I, or Assembler
You should bring experience with mainframe Dev Ops tools and practices, including Zowe, Jenkins, IBM DBB, and IBM Z Open Development
You bring familiarity with modernization initiatives, including mainframe-to-cloud integration and API enablement
You…