Embedded Software Developer – Ethernet PHY & Interface Drivers

FHLB Des Moines; Herlev Kommune; On-site; DKK 700,000 - 900,000; Full time

Benefits offered by this job

Pension

Healthcare

Stock options

Travel opportunities

Job summary

Microchip Denmark seeks an experienced embedded software engineer to design OS-agnostic C APIs for Ethernet PHY interfaces and to support hardware bring-up in automotive and industrial applications.

You will write MISRA-compliant C, contribute to testing infrastructure, and collaborate across cross-functional teams to ensure performance and reliability from chip bring-up to production.

Qualifications

• Strong proficiency in C and embedded software development.
• Experience with physical Ethernet layers, PHYs, and interface standards.
• Willingness to work close to hardware and use datasheets, specs, registers, test equipment, and debug tools.
• Experience in regulated environments with safety, quality, and reliability requirements.

Responsibilities

• Develop and maintain OS-agnostic C APIs for physical network interfaces.
• Bring up and tune Ethernet interfaces from 10 Mbit MII to high-speed (1G–25G).
• Implement PCS and MAC layer functionality from a software driver perspective.
• Develop and maintain PHY drivers for Ethernet standards (1000BASE-T, 1000BASE-T1, 10BASE-T1S).
• Contribute to the associated switch driver.
• Write MISRA-compliant C code per ASPICE and automotive standards.

Skills

C programming

Embedded software

English communication

Education

Relevant technical education

Tools

Git

MISRA

ASPICE

ISO 26262

IEC 62443

Job description

Are you looking for a unique opportunity to be a part of something great? Want to join a 17,000-member team that works on the technology that powers the world around us? Looking for an atmosphere of trust, empowerment, respect, diversity, and communication? How about an opportunity to own a piece of a multi-billion dollar (with a B!) global organization? We offer all that and more at Microchip Technology Inc. People come to work at Microchip because we help design the technology that runs the world. They stay because our culture supports their growth and stability. They are challenged and driven by an incredible array of products and solutions with unlimited career potential. Microchip's nationally-recognized Leadership Passage Programs support career growth where we proudly enroll over a thousand people annually. We take pride in our commitment to employee development, values-based decision making, and strong sense of community, driven by our Vision, Mission, and 11 Guiding Values; we affectionately refer to it as the Aggregate System and it’s won us countless awards for diversity and workplace excellence. Our company is built by dedicated team players who love to challenge the status quo; we did not achieve record revenue and over 30 years of quarterly profitability without a great team dedicated to empowering innovation. People like you.

Job Description: Are you passionate about embedded software and eager to develop drivers that enable physical/electrical network interfaces? Do you thrive when creating software for automotive and other safety-critical industries, and enjoy working close to the hardware? Microchip Denmark is looking for a new colleague to join our local software team, focusing on OS-agnostic C-API products that interface directly with the physical Ethernet layers. You will be part of a highly skilled team working closely with cross-functional groups designing chips, testing them, and supporting customers. Your work will directly impact the performance and reliability of Ethernet interfaces used in automotive and industrial applications.

Key Responsibilities

• Develop and maintain OS-agnostic C APIs for physical network interfaces.
• Bring up and tune a variety of interfaces, ranging from 10 Mbit MII to high-speed Ethernet SerDes interfaces (1G-25G).
• Understand and implement PCS and MAC layer functionality from a software driver perspective.
• Develop and maintain PHY drivers for various Ethernet standards including 1000BASE-T, 1000BASE-T1, 10BASE-T1S, etc.
• Contribute to the associated switch driver as well.
• Write MISRA-compliant C code in accordance with ASPICE and automotive safety standards.
• Contribute to the automated testing infrastructure and help maintain test platforms.

Requirements / Qualifications

• Strong proficiency in C and embedded software development.
• Experience with, or a strong interest in, physical Ethernet layers, PHYs, and interface standards.
• A willingness to work close to hardware and investigate problems using datasheets, specifications, registers, test equipment, and debug tools.
• Experience working in regulated environments with demanding safety, quality, and reliability requirements.
• A structured and analytical approach to troubleshooting complex technical issues.
• The ability to work independently while contributing effectively to a collaborative, cross-functional team.
• Good written and spoken English communication skills.
• A relevant technical education and five or more years of applicable experience.

Additional experience that would be an advantage

• Experience with Ethernet switch SoCs, PHYs, or network interface drivers.
• Knowledge of IEEE 802.1Q and fundamental Layer 2 forwarding concepts.
• Familiarity with Ethernet bring-up, link training, auto-negotiation, PCS, MAC, SerDes, or MDIO management.
• Experience with automotive or industrial Ethernet technologies.
• Knowledge of Git, MISRA, ASPICE, ISO 26262, IEC 62443, or similar standards and processes.
• Experience participating in standardization bodies, industry consortia, or technical working groups.
• Experience with Linux user-space or kernel-space development.
• Experience with Ruby, CMake, automated testing, or continuous integration.
• Practical experience with AI-assisted development tools, with an understanding of responsible use, verification, code ownership, and security considerations.

What we offer

• A key role in a team developing advanced Ethernet technologies for automotive and industrial applications.
• The opportunity to work directly with hardware and influence products from early chip bring-up through production.
• Access to experts in chip design, embedded software, networking, testing, and industry standards.
• A technically challenging environment where learning and innovation are encouraged.
• International collaboration and opportunities for travel.
• Career development opportunities in both technical and managerial directions.
• An informal, friendly, and collaborative office culture with meals and snacks provided.
• Competitive compensation and benefits, including pension, healthcare, and stock options.

Travel Time: 0% - 25%

Join us If you are motivated by challenging embedded-software problems, enjoy working close to the hardware, and want to help build the Ethernet technologies of tomorrow, we would love to hear from you. Join Microchip Denmark and help connect the next generation of vehicles, machines, and industrial systems.