Linux Systems Developer (C++ / PostgreSQL / Mainframe Integration)

Position Name – Linux Systems Developer (C++ / PostgreSQL / Mainframe Integration)

Type of hiring – Subcon

Location – Calgary, AB (onsite)

Job Description :

We are looking for a highly skilled Linux Systems Developer with expertise in software compilation, C++ development, and PostgreSQL . This role involves building and optimizing custom software for Linux environments, integrating with mainframe systems, and supporting application deployments. The ideal candidate will also collaborate with vendors, manage SOPs, and participate in both non-production and production releases.

Roles & Responsibilities

• Development & Compilation
• Design and develop Linux applications using C++ and POSIX APIs.
• Customize and maintain build systems (Makefiles, CMake) for complex software compilation.
• Perform cross-compilation for hybrid environments (Linux ↔ mainframe).
• Optimize binaries for performance, memory usage, and reliability.
• Implement database logic and optimize queries in PostgreSQL (PL / pgSQL, indexing, query tuning).
• Mainframe Integration
• Work with z / OS UNIX System Services (USS) for POSIX-compliant code execution.
• Integrate Linux applications with CICS, IMS, and Tablebase for transaction and data flows.
• Handle EBCDIC ↔ ASCII conversions and ensure data integrity across platforms.
• Application Support & Operations
• Provide application support for production and non-production environments.
• Collaborate with vendors for issue resolution, patches, and upgrades.
• Maintain and update Standard Operating Procedures (SOPs) for operational tasks.
• Participate in deployment activities, including validation and rollback planning.
• Monitor application health and troubleshoot performance issues.
• DevOps & Automation
• Work with CI / CD pipelines for Linux and mainframe integration.
• Automate build, deployment, and monitoring processes using Shell / Python scripting.
• Ensure compliance with security standards and operational best practices.

Required Skills

Nice-to-Have