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Hire IoT Engineers — End-to-End Connected Device Development

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Hire IoT Engineers — Full-Stack Connected Device Development

Building a connected device requires firmware that works in the field, a cloud backend that scales with your fleet, and an interface your operators can actually use. These three layers are often built by separate vendors who hand off to each other — and integration failures happen at every boundary.

CimpleO provides IoT engineers who cover the full stack. We’ve shipped GPS/GSM asset trackers, LoRa smart metering networks, industrial machine monitoring systems, UHF RFID readers, and IoT gateways — from prototype through production fleet.

What Our IoT Engineers Build

Asset Tracking & GPS/GSM Low-power firmware for long-life trackers. Our IoT GAT tracker runs 2.2 years on a single 3.7V cell — achieved through STM32L4 deep sleep scheduling, GSM modem power gating, transmission batching, and RTC-based wake cycles. We implement GNSS (GPS, GLONASS, BeiDou) parsing, cell tower triangulation fallback, and geofencing logic.

Smart Metering & LoRa Networks Multi-node LoRa networks for automated meter reading. Our IoT Home Smart Cloud project covers electricity, water, gas, and heating in a 200+ node deployment with sub-2% packet loss. LoRaWAN 1.0.x/1.1 class A/B/C devices, ChirpStack or TTN network server integration, time-series database (InfluxDB/TimescaleDB), and Grafana dashboards.

Industrial Monitoring & Automation CAN bus, Modbus RTU/TCP, and RS-485 stacks for industrial equipment. RTOS scheduling for time-critical data acquisition. Industrial Smart Cloud — production line telemetry with cloud dashboards and threshold-based alerting.

RFID & Barcode Systems UHF RFID integration (we built the JRD-100 module firmware from protocol stack to host interface), BLE beacon detection, and barcode scanning pipelines for logistics and warehouse applications.

IoT Gateways & Edge Computing Edge devices that preprocess sensor data before sending to cloud — reducing bandwidth, adding local autonomy, and handling cloud connectivity gaps. TensorFlow Lite for on-device inference where real-time classification can’t wait for a cloud round-trip.

Cloud & Backend

We build the cloud infrastructure that your devices talk to:

  • Device connectivity: MQTT broker (EMQX/Mosquitto), AWS IoT Core, Azure IoT Hub, Google Cloud IoT
  • Data ingestion: high-throughput Kafka or Kinesis pipelines for telemetry at scale
  • Storage: time-series databases (InfluxDB, TimescaleDB) for sensor data, PostgreSQL for device registry and configuration
  • APIs: REST and WebSocket APIs for dashboard and mobile app integration
  • OTA update infrastructure: firmware delivery pipeline, version management, rollback capability

Dashboards & Mobile Apps

An IoT system without a usable interface doesn’t get used. We build:

  • Web dashboards: live sensor readings, device map, alert management, historical trends
  • iOS/Android apps: React Native field apps for operators — offline-capable, BLE-connected, push-alerting
  • Admin panels: device provisioning, fleet management, firmware rollout control

Engagement Models

Full product build: firmware + cloud + interface, one team, one engagement.

Firmware only: you have a cloud team; we deliver the embedded layer.

Cloud + interface only: you have hardware; we build the backend and app.

Embedded engineer retainer: dedicated IoT engineer on your team for ongoing product development.

Stack

  • MCUs: STM32 (L0–H7), ESP32/ESP8266, NRF52, Nordic, AVR
  • RTOS: FreeRTOS, Zephyr, ThreadX
  • Connectivity: BLE 5.x, LoRaWAN 1.0/1.1, NB-IoT, LTE-M, GSM/GPRS, Wi-Fi, Zigbee, Z-Wave
  • Protocols: MQTT, CoAP, HTTP/2, Modbus, CAN, RS-485, I2C, SPI, 1-Wire
  • Cloud: AWS IoT, Azure IoT Hub, ThingsBoard, EMQX, ChirpStack
  • Edge: AWS Greengrass, Azure IoT Edge, TensorFlow Lite
  • Data: InfluxDB, TimescaleDB, Grafana, Kafka

For the full hardware side — PCB design, schematic review, component selection — see our IoT Engineering service. For embedded firmware specifically in C/C++ without the cloud layer, see Hire Embedded C Developers.

Get a Scope

Tell us your device type, connectivity requirements, fleet size target, and whether you have hardware yet. We’ll respond within 24 hours with a realistic assessment.

Contact us

Frequently Asked Questions

What does a full-stack IoT engineer cover?

A full-stack IoT engineer handles embedded firmware (C/C++, RTOS), wireless connectivity (BLE, LoRaWAN, NB-IoT, GSM/LTE-M), edge computing logic, cloud backend (AWS IoT, Azure IoT Hub, ThingsBoard, MQTT broker), and the dashboard or mobile app that operators use. Our IoT engineers cover the whole stack — or we scope specifically to the layer you need.

How much does IoT engineering cost?

Firmware + cloud backend for a single device type: $25,000–$70,000. Full product including PCB design, firmware, cloud, and mobile app: $70,000–$200,000+. Dedicated IoT engineer retainer: from $9,000/month. Timeline and cost depend heavily on hardware maturity — if boards are in fab, we start on evaluation kits.

Can you take over an existing IoT project?

Yes. We've audited and taken over firmware from previous vendors, fixed OTA update failures, resolved connectivity reliability issues, and re-architected cloud backends that couldn't handle fleet scale. Send us what you have — we'll assess it honestly.

Do you handle device certification (FCC, CE, RoHS)?

We design firmware and hardware with certification requirements in mind — RF stack configuration, EMC-aware PCB layout, power limits. We work with accredited test labs for actual certification submission. For LoRaWAN devices, we handle LoRa Alliance certification requirements.

What IoT cloud platforms do you work with?

AWS IoT Core, Azure IoT Hub, Google Cloud IoT, ThingsBoard (open source, self-hosted or cloud). For simpler deployments: MQTT broker (Mosquitto, EMQX) + InfluxDB + Grafana. We recommend based on your scale, budget, and whether you need a managed service or want to own the infrastructure.

Can you handle the mobile app as well as the device firmware?

Yes. Most IoT products need a companion app. Our team covers React Native for iOS/Android and web dashboards — not as an afterthought, but as part of the same integrated engagement. The firmware, cloud, and mobile teams communicate directly, which prevents the integration bugs that happen when you have separate vendors.