C Developer @ Kezan

Job Description

We are looking for a proficient C Developer to join our team, focusing on the design, development, and optimization of Linux-based POS applications, particularly for V72 terminals. The ideal candidate will have strong C programming expertise, experience with system-level development on Linux, and a background in POS terminal integration including peripherals such as printers, card readers, and NFC modules.

Experience Required: 3-5 Years

Work Mode: Work from Office, Mohali

Key Responsibilities:

• Design and develop robust POS applications in C for V72 Linux-based terminals.
• Develop and maintain C-based applications with a focus on performance, security, and reliability.
• Interface with POS hardware peripherals: printers, EMV card readers, NFC modules, barcode scanners, touchscreens, etc.
• Work with system-level APIs, inter-process communication (IPC), multi-threading, and memory management.
• Handle serial/USB communication and interact closely with the OS layer for hardware control.
• Develop transaction flow logic, UI rendering, and integrate payment processing features.
• Optimize application performance and minimize resource usage on embedded hardware.
• Conduct thorough code reviews, debugging, and performance tuning.
• Ensure applications are compliant with industry standards (e.g., PCI DSS, EMV) and adhere to security best practices.
• Collaborate with QA, hardware teams, and other engineers for testing and validation.

Required Skills & Qualifications:

• Strong proficiency in C programming with solid understanding of Linux internals.
• Experience with POS application development and V72 or similar embedded terminals.
• Knowledge of NFC, EMV, and related transaction technologies.
• Skilled in IPC mechanisms (pipes, message queues, shared memory) and multi-threaded programming.
• Experience with shell scripting and Linux debugging tools (GDB, Valgrind, Strace, etc.).
• Familiarity with SQL or NoSQL databases for application-level data storage.
• Hands-on with Makefiles, CMake, and version control systems like Git or SVN.
• Ability to troubleshoot performance bottlenecks and secure embedded applications

Preferred Experience:

• Development experience with VX/V72 POS terminals or similar.
• Background in embedded systems, device driver interactions, or hardware integration.
• Previous work in retail, payment, or transaction-processing environments.

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