OT Engineer Job at Koolboks

Koolboks makes refrigeration accessible and affordable to all. Our solar-powered freezers, equipped with Pay-As-You-Go technology and offered through an innovative Cooling-as-a-Service model, enable eco-friendly and accessible refrigeration to everyone who needs it. Life is kool!

We are recruiting to fill the position below:

Job Position: IOT Engineer

Job Location: Lagos
Job Type: Full-time

About the Role

• We are looking for an IoT Engineer to design, develop, and maintain Internet of Things (IoT) solutions that connect devices, sensors, and systems.
• You’ll work across hardware, firmware, cloud platforms, and data pipelines to build secure, scalable, and reliable IoT products.

Key Responsibilities

• Design and develop end-to-end IoT solutions (device → gateway → cloud → application)
• Develop and maintain firmware for IoT devices (MCUs, sensors, actuators)
• Integrate devices with cloud platforms (AWS IoT, Azure IoT Hub, Google Cloud IoT, etc.)
• Implement communication protocols such as MQTT, HTTP/HTTPS, CoAP, BLE, Zigbee, or LoRaWAN
• Ensure device security, authentication, encryption, and OTA updates
• Collect, process, and analyze device data for monitoring and insights
• Troubleshoot hardware, firmware, and network issues
• Collaborate with hardware, software, and data teams to deliver solutions
• Create technical documentation and system diagrams

Required Skills & Qualifications

• Bachelor’s Degree in Computer Science, Electronics, Electrical Engineering, or related field
• Experience with embedded systems and microcontrollers (ESP32, STM32, Arduino, Raspberry Pi, etc.)
• Strong programming skills in C/C++, Python, or Java
• Hands-on experience with IoT communication protocols (MQTT, HTTP, BLE, etc.)
• Experience with cloud services and REST APIs
• Understanding of networking concepts (TCP/IP, Wi-Fi, cellular, LPWAN)
• Familiarity with Linux-based systems
• Knowledge of security best practices for IoT systems

Preferred / Nice-to-Have Skills:

• Experience with real-time operating systems (FreeRTOS, Zephyr)
• Knowledge of data analytics, dashboards, or visualization tools
• Experience with DevOps, CI/CD, or containerization (Docker)
• Exposure to edge computing and AI/ML at the edge
• Industry experience (smart home, industrial IoT, healthcare, automotive, etc.)