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.
