Linux Systems Developer

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.
  

Required Skills

• Strong proficiency in C++ (modern standards), STL, multi-threading, and memory management.
  
• Expertise in Linux system programming (POSIX APIs, IPC, signals).
  
• Hands-on experience with GNU toolchain (gcc, g++, ld, make, CMake).
  
• Knowledge of PostgreSQL (schema design, query optimization, PL/pgSQL).
  
• Familiarity with cross-compilation and hybrid architecture builds.
  
• Experience with mainframe integration (CICS, IMS, TableBase).
  
• Debugging and profiling tools: gdb, strace, perf, valgrind.
  
• Strong scripting skills in Shell and Python.
  

Nice-to-Have

• Experience with z/Linux (Linux on IBM Z).
  
• Familiarity with containerization (Docker/Kubernetes).
  
• Understanding of RACF/ACF2 security models.
  

Soft Skills

• Strong problem-solving and troubleshooting abilities.
  
• Excellent communication and vendor management skills.
  
• Ability to document processes and maintain SOPs.