JOB DESCRIPTIONPCB Design and Electronic Circuit Assembly EngineerCompany: Plumule Research LLP

Location: Durgapur, West Bengal

Department: Engineering – Electronics & Industrial IoT

Position: PCB Design and Electronic Circuit Assembly Engineer

Employment Type: Full-time

- About Plumule Research LLPPlumule Research LLP is an Industry 4.0 engineering and technology company focused on delivering secure and sustainable industrial innovations. We develop integrated solutions combining industrial sensors, electronics, embedded systems, IoT, AI and automation for sectors such as steel, metals, mining and power.

We are looking for a hands-on electronics engineer who can independently design, develop, assemble, test and troubleshoot electronic circuits and PCB assemblies for industrial IoT applications.
- Role OverviewThe engineer will be responsible for the complete electronics development lifecycle, starting from circuit design and PCB layout to component procurement, PCB fabrication, electronic assembly, integration, testing and validation.

The role requires practical experience in designing sensor interface circuits, signal conditioning modules, power management circuits, communication interfaces and embedded electronics.

The candidate will work towards developing a modular and scalable electronics assembly process for Plumule's industrial IoT products.

- Key ResponsibilitiesA. Electronic Circuit Design

- Design analog and digital electronic circuits for industrial applications.
- Develop 4–20 mA current loop interface and signal conditioning circuits.
- Design circuits for RTD, thermocouple, voltage and current-based sensor interfaces.
- Develop signal isolation, amplification, filtering and protection circuits.
- Design DC-DC converters, voltage regulators and power management circuits.
- Design interfaces for industrial sensors and communication modules.
- Understand datasheets and select appropriate electronic components.

B. PCB Design and Development

- Create schematic diagrams and PCB layouts using KiCad, Altium Designer or equivalent tools.
- Design single-layer, double-layer and multilayer PCBs.
- Perform component footprint selection, routing, grounding and power-plane design.
- Ensure EMI/EMC considerations, electrical isolation and industrial noise immunity.
- Generate Gerber, BOM,



Pick-and-Place and fabrication files.
- Coordinate with PCB fabrication vendors and manage design revisions.

C. Electronic Circuit Assembly

- Assemble electronic circuits and PCB modules using through-hole and SMD components.
- Perform soldering, desoldering, rework and component replacement.
- Work with soldering stations, hot-air rework stations and basic assembly equipment.
- Integrate electronic modules, connectors, terminal blocks, sensors and communication devices.
- Develop standardised assembly procedures and work instructions.
- Support prototype development and small-batch production.

D. Testing and Quality Assurance

- Test assembled PCBs for electrical continuity, short circuits and component functionality.
- Perform voltage, current, signal and power measurements.
- Use digital multimeters, oscilloscopes, function generators and bench power supplies.
- Troubleshoot hardware faults and identify root causes.
- Conduct functional testing and burn-in testing wherever required.
- Maintain test reports, inspection records and product traceability.

E. Embedded Electronics and IoT Integration

- Integrate ESP32, STM32 and other microcontroller-based platforms.
- Interface electronic circuits with LoRaWAN communication modules.
- Integrate industrial sensors with wireless IoT nodes.
- Understand UART, SPI, I2C, RS485, Modbus RTU and MQTT interfaces.
- Support firmware testing and hardware-software integration.
- Assist in developing compact, modular and field-deployable IoT devices.

4. Technical Skills RequiredSkill AreaRequired KnowledgeCircuit DesignAnalog and digital electronicsPCB DesignKiCad / Altium / EaglePCB AssemblySMD and through-hole solderingSignal Conditioning4–20 mA, 0–10 V, isolationMicrocontrollersESP32, STM32, ArduinoCommunicationUART, SPI, I2C, RS485Industrial ProtocolsModbus RTU/TCPTest EquipmentDMM, oscilloscope, power supplyComponentsOp-amps, ADC, DAC, MOSFET,



regulatorsIoTLoRaWAN, sensor integration
- Educational Qualification
- Diploma / B.Tech / B.E. in Electronics and Communication Engineering, Electrical Engineering, Instrumentation Engineering or equivalent.
- Practical electronics development experience is preferred.
- Freshers with solid hands-on electronics and PCB design capabilities may also apply.

6. Experience
- 1–4 years of relevant experience preferred.
- Freshers with demonstrable PCB design and hardware development projects may be considered.

7. Preferred Additional Skills
- Experience with industrial sensor integration.
- Knowledge of 4–20 mA transmitters and receivers.
- Experience with opto-isolation and galvanic isolation.
- Familiarity with enclosure design and cable harnessing.
- Understanding of ESD protection, surge protection and reverse polarity protection.
- Experience in developing prototypes and converting them into production-ready designs.
- Knowledge of IPC-A-610 and IPC J-STD-001 standards is desirable.

8. Key Performance ExpectationsThe candidate will be evaluated on:

1. Ability to independently design functional electronic circuits.
2. Accuracy and quality of PCB layouts and fabrication files.
3. Assembly quality and soldering workmanship.
4. Ability to troubleshoot and resolve hardware failures.
5. Successful integration of industrial sensors with IoT communication nodes.
6. Reduction in assembly time, component wastage and rework.
7. Development of standardised and repeatable assembly processes.
8. Preparation of technical documentation, BOMs and testing procedures.

9. Nature of WorkThis is a hands-on engineering position involving both design and shop-floor electronics development. The selected candidate will work on actual industrial IoT products, including sensor interface modules, signal conditioning boards, LoRaWAN nodes, embedded electronics and industrial monitoring devices.

The role offers an opportunity to participate in building a modular electronics development and assembly facility.

- ApplicationInterested candidates may submit their updated CV along with details of PCB design projects, circuit development experience and practical electronics assembly work.

Plumule Research LLP

Durgapur, West Bengal

📌 PCB Design and Electronic Circuit Assembly Engineer (Durgapur)
🏢 Plumule Research
📍 Durgapur