Embedded Hardware Engineer – IoT

About Us

We are building next-generation IoT smart devices (ESP32-based smart switches, energy monitoring modules, automation controllers) under our brand. Our products include high-voltage (230V AC) switching, WiFi connectivity, and smart automation features.

We are looking for a skilled Embedded Hardware Engineer to design production-ready IoT hardware modules.

Role Responsibilities

• Design schematics for IoT devices (ESP32, power supply, protection circuits)
• Design and optimize PCB layouts (2-layer / 4-layer)
• Work on 230V AC switching circuits (relay / triac based)
• Design AC to DC power supply sections (SMPS or isolated modules)
• Ensure proper creepage & clearance for mains safety
• Implement EMI/EMC best practices
• Select cost-optimized components and prepare BOM
• Generate manufacturing-ready files (Gerber, Pick & Place, Assembly drawings)
• Prototype testing and debugging
• Coordinate with PCB manufacturers (e.g., JLCPCB)

Required Skills

• Strong knowledge of analog & digital electronics
• Experience with ESP32-based hardware design
• Experience with Altium / KiCad / EasyEDA
• Knowledge of:
• RF layout best practices (antenna keep-out)
• Power supply design
• ESD & surge protection
• EMI noise reduction
• Understanding of 230V AC design safety
• Ability to design for mass production (DFM/DFT)

Good to Have

• Experience with IoT products
• Firmware understanding (ESP-IDF / Arduino)
• Experience designing 16A smart switches or similar products
• Knowledge of compliance standards (CE, FCC, BIS – optional)

Employment Type

• Part-Time (Project-based or Monthly Retainer)
• Full-Time (On-site / Remote)

How to apply :

Embedded Hardware / PCB Design Challenge (IoT 16A Switch Module)Objective

Design a compact ESP32-based IoT switch module that can safely control a 16A AC load, while keeping BOM cost optimized and supporting manual control and AC presence detection.

1) Mechanical Constraints

• PCB Size: 49 mm × 43 mm
• Max height: 23 mm (including tallest component on the PCB)
• Candidate must consider component placement to fit within the height limit.

2) Electrical RequirementsA) Load Control (16A)

• Must control up to 16A AC load (typical 230V AC region).
• Candidate can choose Relay or Triac, but must justify the choice.
• Must include snubber / surge / EMI protection appropriate for high-current AC switching.

B) Microcontroller

• Must be ESP32-based (ESP32-WROOM / ESP32-C3 / ESP32-S3 etc. – candidate may choose based on BOM + availability).
• Provide boot/programming access via connector (see below).

C) Manual Switch Option + AC Detection

• Include a manual switch input so the device can be operated without the app.
• Must implement AC detection (mains presence / zero-cross / AC sense) to support reliable switching logic.
• The AC detection method must be safe and should consider isolation requirements.

D) Power

• Input power from AC mains (or via external module if candidate proposes it).
• Provide stable rails for:
• 5V
• 3.3V
• Candidate must optimize for BOM and production reliability.

3) Connector Requirement (Mandatory)

Add a 2.54mm JST 5-pin right-angle connector for:

• 5V
• 3.3V
• TX
• RX
• GND

(Use common JST-XH / compatible 2.54mm footprint and ensure it matches typical cable housings.)

4) Cost & Production Requirements (BOM Focus)

• BOM should be optimized for mass production and sourcing (prefer common parts).
• Provide a BOM list with estimated pricing (even approximate is fine) and mention the sourcing assumptions (LCSC / local India / etc.).
• Design must be DFM-friendly:
• Test pads / programming points
• Clear silkscreen labels
• Proper creepage/clearance for mains
• Keep-out and isolation rules documented

5) Safety & Layout Requirements (Very Important)

• Maintain correct creepage/clearance for 230V AC.
• Include isolation slots / spacing if needed.
• Ensure ESP32 area is separated from the HV section.
• Add required protection (at minimum: fuse strategy or current protection approach, MOV/TVS choice, ESD considerations).

6) Deliverables (Submit All)

Candidate must submit:

A) Schematic

• Full schematic PDF
• Source design files (KiCad/Altium/EasyEDA project)

B) PCB Layout

• PCB layout source files
• Gerber files (optional but preferred)
• 2D PCB images (top/bottom)
• Clear indication of HV/LV segregation and protection parts

C) 3D View

• 3D renders (top and angled view)
• STEP export (preferred)

D) BOM & Notes

• BOM in Excel/CSV
• Design notes explaining:
• Relay vs triac choice
• AC detection method
• Protection/EMI strategy
• Key layout constraints and decisions

7) Evaluation Criteria

We will evaluate based on:

• Electrical correctness and safety for 16A AC
• PCB layout quality (HV/LV separation, routing, thermal considerations)
• BOM cost optimization and part availability
• Manufacturability (DFM/DFT, assembly friendliness)
• Completeness of documentation and deliverables

8) Submission Format

• Put everything in a single folder and share via Google Drive/Dropbox link, or zip file.
• Also email the submission to: admin@bururetails.com

Job Types: Full-time, Part-time, Permanent, Fresher, Internship, Contractual / Temporary, Freelance, Volunteer
Contract length: 6 months

Pay: From ₹8,086.00 per month

Expected hours: 8 per week

Work Location: Remote