IoT Firmware Intern

Mann+Hummel • Bachelor's Degree • Structured Text • 20 days ago
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Salary
≈ $19k – $36k per year (Estimated)
Location
In office (Singapore)
Seniority
Intern
Employment
Internship

Confirmed on the employer's own hiring board on Oct 14, 2026. First seen by Alion on Sep 24, 2026.

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Mann+Hummel

Mann+Hummel is a family-owned German filtration company headquartered in Ludwigsburg that makes air, oil, fuel and cabin air filters, intake systems, filtration materials and membranes for vehicles, industry, buildings and water treatment. Active in filtration since 1941, it operates more than 80 locations worldwide and owns brands such as Purolator, whose US business is based in Fayetteville, North Carolina, alongside large US plants in Gastonia and Wichita. It hires machine and setup operators, quality and applications engineers, supply chain planners, sales account managers, IoT and digital interns and German working students.
mann-hummel.com • HQ: Ludwigsburg, Germany • Industrial Machinery • Automotive Components • 5000+ employees • Est. 1941
Tech stack of Mann+Hummel

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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