Firmware Developer
11 hours ago
Job Title: Firmware Engineer (Hardware Integration)
Location: Sector 62, Gurugram, Haryana 122101
Experience Level: Required Experience 1-2 years
Apply Now -
About Us:
At Enlog, we are redefining energy management with innovative technology that helps businesses and communities reduce energy waste and embrace sustainable practices. As a vibrant startup, we offer a dynamic work culture, meaningful learning experiences, and the opportunity to contribute to a greener planet.
About Role:
We are seeking a skilled and motivated Firmware Engineer to join our hardware engineering team. You will be responsible for developing, testing, and optimizing firmware for custom hardware platforms, ensuring reliable system performance across embedded devices.
This role requires strong hands-on experience with embedded C/C++, microcontroller platforms (e.g., ARM, STM32, ESP), and direct interaction with hardware peripherals. You'll work closely with hardware engineers and product teams to bring devices from prototype to production.
Responsibilities:
A. Firmware Architecture & Development
- Architect, write, and optimize firmware for ESP32 (C3, C6, S3) and STM32-based boards
- Develop real-time sensor drivers for energy monitoring ICs (e.g., HLW8012, HT7017, BL0937)
- Build a modular firmware stack supporting:
- Mesh communication
- MQTT publishing
- OTA updates
- Offline fallback modes
- Implement fail-safe logic including:
i. NVS/Flash-based configuration
ii. Power-loss recovery routines
iii. Watchdog/reset handlers
B.
Communication & Protocol Stack
- Implement and debug custom mesh protocols over ESP-NOW / for Enmate).
- Maintain ultra-lightweight MQTT stack, free from heavy third-party dependencies.
- Optimize low-level comms: UART, SPI, I2C, especially under interrupt-driven loads.
- Optional: Add support for TLS and secure provisioning if needed.
C.
Device Management & OTA
- Build and maintain OTA systems using ESP-IDF / STM32 HAL with:
i. Rollback support
ii. Firmware integrity validation
- Manage config persistence via NVS, SPIFFS, or Flash FS
- Implement local fallback flows like:
i. Hotspot mode for setup
ii. IP-based configuration access
iii. Config sync from cloud/mesh root
D.
Testing & Validation
- Develop test harnesses for:
i. Unit-level validation of pin states, sensor reads, publishing logic
ii. Stress testing relays, memory safety, power stability
- Support QA during:
i. EMC compliance
ii. Field deployment validation
iii. Regression suite development
E.
Collaboration & Mentorship
- Work with hardware engineers for:
i. Pin muxing
ii. Layout constraints
iii. EMI-safe firmware behaviour
- Coordinate with backend and mobile teams for:
i. Payload formatting
ii. Clock sync logic
iii. Retry/fallback design
iv. Mentor junior engineers on structured firmware design, debugging tools, and release readiness
Tools & Ecosystem:
- Development: ESP-IDF, STM32Cube, PlatformIO
- Debugging: JTAG, GDB, Logic Analyzers
- DevOps: GitHub, Jira, OTA build + CI pipelines
- Editors: VSCode, CLion, or any preferred tool
Requirements:
- Bachelor's degree in Electronics, Electrical, Computer Engineering, or related field.
- 2+ years of hands-on experience in firmware development for embedded hardware.
- Proficient in Embedded C/C++ programming.
- Experience with microcontrollers (e.g., STM32, ESP32, PIC, ARM Cortex).
- Strong understanding of digital electronics, schematics, and hardware debugging tools oscilloscopes, logic analysers.
- Familiarity with communication protocols: I2C, SPI, UART, CAN, Modbus.
- Ability to work with version control tools like Git and CI workflows.
Nice to Have:
- Experience with RTOS
- Familiarity with firmware-over-the-air (FOTA) updates and bootloader design.
- Python scripting for testing or automation.
- Exposure to IoT stacks (BLE, Wi-Fi, MQTT, etc.).
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