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Apptoza Inc.

Senior Tandem / Mainframe Developer

Toronto, ON, Canada

Job type: Contract
Apply by: Oct 23, 2026
Posting language: English
Posted: Sep 23, 2026

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Original job description

Senior Tandem / Mainframe Developer

Location: Toronto hybrid 4days

Job Type: Contract

Job Description

We are looking for a Tandem / Mainframe Developer with strong experience in HP NonStop (Tandem) and/or Mainframe technologies. The candidate will be responsible for application development, maintenance, enhancements, and production support.

Required Skills

Strong experience in Tandem / HP NonStop development.
Experience with COBOL and TACL.
Experience with Enscribe and/or SQL/MP, SQL/MX.
Good knowledge of Mainframe technologies such as COBOL, JCL, DB2, and CICS.
Experience in application development, maintenance, and troubleshooting.
Experience with production support and incident resolution.
Ability to analyze requirements and develop technical solutions.
Good understanding of SDLC and Agile methodologies.
Strong communication and problem-solving skills.

Responsibilities

Develop, enhance, and maintain Tandem/Mainframe applications.
Analyze business and technical requirements.
Perform coding, testing, debugging, and implementation.
Troubleshoot production issues and provide timely resolutions.
Work with cross-functional teams to deliver application changes.
Prepare technical documentation and support application releases.

Preferred

Experience working in Banking / Financial Services is a plus.
Experience with Tandem-to-Mainframe or Mainframe-to-Tandem integration/migration is preferred.
Experience with batch processing and production support is an advantage.

Apply About employer

More about this job

Responsibilities

Develop, enhance, test, implement, and maintain Tandem and Mainframe applications based on business and technical requirements. Troubleshoot production issues, support releases, prepare technical documentation, and collaborate with cross-functional teams.

Requirements

Candidates should have strong Tandem / HP NonStop development experience, including COBOL and TACL, and familiarity with Enscribe or SQL/MP or SQL/MX. Mainframe knowledge including COBOL, JCL, DB2, and CICS is also relevant, along with application support, troubleshooting, SDLC, and Agile experience.

Skills

Tandem / HP NonStop
Mainframe Development
COBOL
TACL
Enscribe
SQL/MP
SQL/MX
JCL
DB2
CICS
Application Development
Production Support
Troubleshooting
Batch Processing
Agile
Incident Resolution

Visa sponsorship

Not detected in the job text

Keywords

Tandem
HP NonStop
Mainframe
COBOL
TACL
Enscribe
SQL/MP
SQL/MX
JCL
DB2
CICS
Application Development
Application Maintenance
Production Support
Incident Resolution
Troubleshooting
Batch Processing
SDLC
Agile
Banking
Financial Services
Integration
Migration
Coding
Testing
Debugging
Technical Documentation
Requirements Analysis

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