IoT Firmware Intern at MANN+HUMMEL | Jobyssey

Role Summary

We are looking for a resourceful and self-driven intern to join our firmware team working on IoT gateway products. This role is ideal for students who have a foundation in embedded systems and industrial automation, and who are eager to bridge embedded firmware with PLC-based industrial control systems.

Our team currently has strong embedded firmware expertise but limited hands-on experience with PLC systems and industrial interfaces. This internship is designed to explore, prototype, and document how modern PLC systems integrate with IoT gateways, helping us close that knowledge gap.

Main Tasks

Embedded Firmware Development

Assist in developing and maintaining embedded firmware in C for IoT gateway products
Work with microcontrollers, peripherals, and communication interfaces (UART, SPI, I²C, Ethernet)
Support debugging, testing, and validation of firmware features

PLC & Industrial Automation Exploration

Research PLC fundamentals, architectures, and programming models
Explore common PLC programming standards (e.g., IEC 61131-3)
Investigate PLC-to-IoT gateway integration methods, such as:
- Modbus (RTU/TCP)
- OPC UA
- Industrial Ethernet protocols (basic understanding)

Prototyping & Integration

Build simple proof-of-concept integrations between PLCs and embedded systems
Develop small demo applications (e.g., PLC data ingestion → IoT gateway → cloud)
Test interoperability with real or simulated PLC environments

Research & Knowledge Transfer

Independently explore industry practices, tools, and architectures
Evaluate different PLC vendors, tools, and ecosystem approaches
Document findings clearly for the firmware team (technical notes, diagrams, demos)

Experience

Required Qualification

Currently pursuing a Bachelor’s or Master’s degree in:
- Electrical / Electronics Engineering
- Computer Engineering
- Mechatronics
- Industrial Automation
- Embedded Systems (or related fields)
Programming foundation in C
Basic understanding of embedded systems concepts:
- Microcontrollers
- Memory, interrupts, peripherals
Academic exposure to industrial automation or control systems

Nice to have skills

Hands-on experience or coursework in PLC programming
- Ladder Logic (LD)
- Structured Text (ST)
- Function Block Diagram (FBD)
Basic knowledge of industrial communication protocols

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Role Summary

Main Tasks

Experience

Required Qualification

Nice to have skills