Apply on Kit Job: kitjob.in/job/4702ze

We are building a wall-mounted biometric access control device - fingerprint and face recognition - across four product variants on a single shared PCB. The project is at the hardware specification stage and we are looking for a consultant to take it to prototype.

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About the Role

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We are hiring a Freelance Embedded Hardware Consultant to lead the component selection, PCB design, and bring-up of a production-ready biometric device. This is a hands-on technical role with end-to-end ownership from schematic to working prototype.

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What You Will Work On

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Single PCB design supporting four variants: fingerprint only, fingerprint with LAN, fingerprint with face recognition, and full biometric with WiFi and LAN. Component selection across MCU platforms including ESP32-S3, STM32H7, and Rockchip RV1106. Integration of fingerprint modules (R307/R503), face recognition modules or onboard NPU, W5500 or RTL8201F Ethernet, DS3231 RTC, relay output for door lock control, and a 2.4 inch TFT display. Firmware architecture for UART-driven peripheral communication, WiFi and Ethernet stack, and attendance logging. Coordination with JLCPCB or PCBWay for fabrication and PCBA at 10 to 50 unit scale.



BOM optimization for Indian sourcing through LCSC, Robu, and AliExpress.

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What We Are Looking For

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5 or more years of experience in embedded hardware design with PCB layout in KiCad or Altium. Hands-on experience with at least one of ESP32, STM32, or Linux-based SoCs. Prior work on access control, IoT devices, or industrial hardware preferred. Robust understanding of power supply design, UART, SPI, I2C, and Ethernet PHY integration. Ability to deliver a working prototype within 8 to 12 weeks. Based in India preferred. Open to remote with milestone-based deliverables.

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Engagement

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This is a project-based consulting engagement. Compensation is milestone-linked and negotiable based on experience and scope. Equity participation is open to discussion for the right candidate who wants a longer-term association.

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To Apply

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Send a message with your portfolio, relevant projects, and your approach to this kind of multi-variant single-PCB design. Links to previous hardware work are strongly preferred over a traditional resume.

Apply on Kit Job: kitjob.in/job/4702ze

📌 Senior Embedded Systems Consultant Iot And Biometric Hardware Tirupati
🏢 Perimattic
📍 Tirupati