Embedded IoT Prototype Development
Budget / SalaryHourly project
TypeFreelance project
LocationRemote
Posted1 hour ago
I have a junior engineer building the early schematics for an asset-intelligence prototype and I need an experienced embedded-systems specialist to guide the hardware design, write the firmware, and get the first units reliably streaming data to the cloud.
The boards must interface with temperature, pressure and motion and more sensors, carry out real-time analysis, perform basic filtering, then aggregate and compress the packets before they leave the device. Security on the wire is non-negotiable, so please be comfortable implementing encrypted transport and key management on resource-constrained MCUs.
You will collaborate directly with us on:
• Selecting the optimal MCU / wireless stack and finalising the schematic
• Integrating the three sensor types and validating their accuracy in lab tests
• Coding the firmware (C/C++ or Rust preferred, but I am open) that handles the full local-processing pipeline described above
• Setting up secure OTA update hooks so we can iterate quickly
• Delivering a clean, well-documented API that hands structured JSON (or a similarly lightweight format) to our cloud ingress endpoint
• Producing brief build notes and a bill of materials so we can send the design for a small production run
Acceptance criteria:
1. A hand-solderable prototype or assembled dev-kit that boots reliably and logs its start-up sequence over serial.
2. Live sensor data visible in a test dashboard within 200 ms of physical stimulus, proving real-time analysis is functioning.
3. Payload size reduced by the agreed compression ratio before transmission.
4. Encrypted packets pass penetration tests using industry-standard tooling.
5. Source files, schematics, BOM and firmware are pushed to our private repo with build instructions that reproduce the result on a fresh workstation.
If this fits your background in PCB layout, low-power firmware and secure IoT data pipelines, I’d like to start immediately and iterate in tight weekly milestones until we have field-ready hardware.
The boards must interface with temperature, pressure and motion and more sensors, carry out real-time analysis, perform basic filtering, then aggregate and compress the packets before they leave the device. Security on the wire is non-negotiable, so please be comfortable implementing encrypted transport and key management on resource-constrained MCUs.
You will collaborate directly with us on:
• Selecting the optimal MCU / wireless stack and finalising the schematic
• Integrating the three sensor types and validating their accuracy in lab tests
• Coding the firmware (C/C++ or Rust preferred, but I am open) that handles the full local-processing pipeline described above
• Setting up secure OTA update hooks so we can iterate quickly
• Delivering a clean, well-documented API that hands structured JSON (or a similarly lightweight format) to our cloud ingress endpoint
• Producing brief build notes and a bill of materials so we can send the design for a small production run
Acceptance criteria:
1. A hand-solderable prototype or assembled dev-kit that boots reliably and logs its start-up sequence over serial.
2. Live sensor data visible in a test dashboard within 200 ms of physical stimulus, proving real-time analysis is functioning.
3. Payload size reduced by the agreed compression ratio before transmission.
4. Encrypted packets pass penetration tests using industry-standard tooling.
5. Source files, schematics, BOM and firmware are pushed to our private repo with build instructions that reproduce the result on a fresh workstation.
If this fits your background in PCB layout, low-power firmware and secure IoT data pipelines, I’d like to start immediately and iterate in tight weekly milestones until we have field-ready hardware.
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