C Developer

Job Title: C Developer

Location: Mumbai (Work from office)

Employment Type: Full-time

Experience Required: 6-8 years

Industry: Fintech / Embedded Systems / Payments Technology

We are seeking a skilled and experienced C Developer with a strong background in embedded systems development. The ideal candidate must have hands-on experience working with RTOS (UCOS-II), LVGL for GUI development, and practical exposure in the payment domain.

This role demands strong capabilities in terminal handling, deployment, secure code practices(code signing), and debugging using industry protocols such as MQTT.

Key Responsibilities:

Develop and maintain embedded applications in C for payment terminals and related devices.

Work extensively with UCOS-II RTOS, including task scheduling, inter-process communication, and real-time system performance.

Design and implement GUI interfaces using LVGL library in resource-constrained environments.

Integrate and maintain communication protocols, especially MQTT, for device communication and cloud sync.

Handle terminal-level operations including deployment, firmware updates, device provisioning, and secure code signing.

Debug, test, and validate code in live environments ensuring compliance with payment security standards (PCI DSS, EMVCo, etc.).

Collaborate with QA, security, and hardware teams to ensure seamless integration and high system reliability.

Create and maintain technical documentation and deployment guides.

Required Skills and Qualifications:

Strong proficiency in C programming language, especially in embedded environments.

Minimum 6 years of experience working with RTOS (UCOS-II preferred).

Proven experience with LVGL for building modern and responsive user interfaces on embedded platforms.

Solid experience in payment terminal applications, or POS systems.

Hands-on knowledge of terminal handling, remote deployment, and device lifecycle management.

Familiarity with secure code signing, encryption techniques, and debugging tools for embedded systems.

Experience working with MQTT protocol for lightweight messaging and communication.

Familiar with version control systems like Git, and basic CI/CD workflows.

Strong analytical and problem-solving skills.

Preferred Qualifications:

Experience with EMV, NFC, or contactless payment technologies.

Knowledge of Linux kernel-level programming or other RTOS platforms.

Experience in device certification processes for financial terminals.