Cellular / Wireless Engineer

Square One Resources is looking for an experienced Cellular / Wireless Engineer to support the transition of an existing connected IoT product platform from 4G/LTE connectivity to LoRaWAN, focusing on LoRaWAN Class B operation.

• Strong experience with LoRaWAN and embedded IoT products.
• Hands-on experience with LoRaWAN Class B.
• Good understanding of beacon acquisition, synchronization, ping-slot scheduling, and Class B downlink behaviour.
• Experience with 4G/LTE cellular technologies and embedded cellular modules.
• Strong understanding of RF fundamentals, antennas, link budgets, receiver sensitivity, and wireless performance.
• Experience integrating wireless modules into embedded hardware and software platforms.
• Strong understanding of low-power and battery-operated wireless devices.
• Experience with interfaces such as UART, SPI, and I²C.
• Ability to troubleshoot across RF, hardware, firmware, protocol, and network layers.
• Experience taking wireless products from development through verification and into production.

• Support the technical transition from an existing 4G/LTE-based solution to LoRaWAN.
• Define and implement a LoRaWAN Class B communication solution.
• Work with Class B beacons, time synchronization, and scheduled receive windows (ping slots).
• Analyse existing cellular architecture, communication patterns, latency requirements, coverage and power consumption.
• Evaluate trade-offs between Class A, B, and C focusing on predictable downlink communication and low power consumption.
• Support selection and integration of appropriate LoRa/LoRaWAN chipsets, modules, and RF components.
• Collaborate with embedded software teams on drivers, protocol stack integration, and device communication.
• Configure and optimize parameters including spreading factor, bandwidth, coding rate, transmission power, and Adaptive Data Rate (ADR).
• Optimize battery lifetime, communication reliability, latency, and range.
• Support RF testing, link-budget analysis, coverage testing, and field verification.
• Troubleshoot issues across RF, hardware, firmware, LoRaWAN protocol, and network layers.
• Support verification and validation towards product and regulatory requirements.
• Document architecture, technical decisions, test results, and recommendations.