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Mainframe/Assembler Developer
Mainframe/Assembler DeveloperLanceSoft • Toronto, ON, CA
Mainframe / Assembler Developer

Mainframe / Assembler Developer

LanceSoft • Toronto, ON, CA
5 days ago
Job type
  • Full-time
Job description

Location Address

2201 Eglinton Ave East - Scarborough

Contract Duration

02 / 16 / 2026 to 04 / 30 / 2026

Possibility of Extension & Conversion to FTE

Possible

Schedule Hours

9am-5pm Monday-Friday; standard 37.5 hrs / week (Possible OT)

Story Behind the Need (Reason for hiring)

The team requires a highly specialized Mainframe / Assembler Developer to support complex legacy systems, modernize critical applications, and ensure stability, security, and performance across high impact banking platforms. This role fills a senior technical gap and supports ongoing transformation and maintenance initiatives.

Business group

Mainframe Application Development / Core Banking Technology

Project

Enhancement, modernization, and ongoing support of large scale mainframe applications, including Assembler based components, COBOL programs, and integration with enterprise systems such as WebSphere, Informatica, and ETL pipelines.

Candidate Value Proposition

  • The successful candidate will have the opportunity to :
  • Work on mission critical banking systems with high visibility and impact.
  • Lead complex development initiatives using advanced mainframe technologies.
  • Influence modernization efforts and contribute to long term architectural improvements.
  • Collaborate with senior engineers, architects, and cross functional teams across the bank.
  • Apply deep technical expertise in an environment that values innovation and continuous improvement.

Typical Day in Role

  • Analyze complex business and system requirements and translate them into detailed technical specifications.
  • Design, develop, enhance, and maintain Assembler and COBOL programs within large scale mainframe environments.
  • Support modeling, simulation, performance tuning, and troubleshooting activities.
  • Work with JCL, DB2, VSAM, and mainframe utilities to deliver robust and secure solutions.
  • Ensure compliance with enterprise standards for quality, security, and regulatory requirements.
  • Participate in Agile / iterative SDLC processes, including daily standups, sprint planning, and code reviews.
  • Collaborate with infrastructure, security, DevOps, and integration teams as needed.
  • Candidate Requirements / Must Have Skills

  • 10+ years of recent, hands on Assembler (HLASM) development experience — expert level proficiency required.
  • 10+ years of mainframe development experience using COBOL, JCL, DB2, VSAM, Netron.
  • 5+ years’ experience with security and environment control systems such as ISPW, Endevor, RACF; plus database management tools (IDB2, VSAM).
  • 5+ years’ experience with mainframe utilities and productivity tools (MVS / TSO, ACR, COMPAREX, SYNCSORT, IDCAMS, CRF, File Manager).
  • 5+ years of strong DB2, DFSORT, JCL, and COBOL experience supporting large scale enterprise applications.
  • Nice To Have Skills

  • Understanding of file transfer protocols (FTP, SFTP).
  • Knowledge of mainframe integration for ETL processing.
  • Experience with DevOps practices and tooling.
  • Experience with web services and APIs.
  • Education & Certificates

  • Diploma or Bachelor’s degree in Information Technology, Engineering, Computer Science, or a related field.
  • Additional mainframe or security certifications are an asset.
  • Best vs. Average Candidate

    A highly seasoned mainframe engineer with deep Assembler expertise, strong COBOL / JCL / DB2 proficiency, and proven experience delivering complex, large scale solutions in a regulated enterprise environment. They demonstrate strong problem solving skills, adaptability, and the ability to work independently while collaborating effectively across teams.

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    MainframeAssembler Developer • Toronto, ON, CA

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