Roles they hire for
- Automotive MCU software engineer (AURIX, MCAL)
- Security software engineer (secure elements)
What they emphasise
- AURIX safety microcontrollers and MCAL drivers
- OPTIGA secure elements and automotive security
- CAN FD and vehicle networking
Brush up on
MCALISO 26262Lockstep coresSecure elementsCAN FD
How the rounds usually run
A typical silicon vendor loop for embedded roles. Companies vary by team and seniority.
Online assessment or screen
- C output prediction, pointers and bit manipulation
- Digital logic and OS basics
- For experienced hires, often a recruiter and hiring-manager screen instead
Example: What does this print: an unsigned char set to 200 plus 100, printed as an integer?
Technical 1: C and embedded fundamentals
- Pointers, volatile, const, alignment and endianness
- Interrupts, stacks and memory layout
- Live C coding on bit fields, ring buffers or string handling
Example: Implement a lock-free single-producer, single-consumer ring buffer.
Technical 2: Drivers and architecture
- Designing a peripheral driver and its API
- DMA, caches and interrupt priorities
- RTOS internals and debugging stories
Example: Design a SPI driver that supports blocking, interrupt and DMA modes behind one API.
Technical 3 or hiring manager: system design and projects
- Deep dive into a past project and your design choices
- System-level trade-offs: power, memory, performance
- Sometimes a short presentation on a project
Example: Walk through the hardest bug you've fixed, and what you changed in the process afterwards.
HR and behavioural
- Motivation, teamwork and conflict
- Relocation, notice period and compensation
Example: Tell me about a time you disagreed with a design decision.
Practice questions
Original questions written for Infineon's focus areas, not leaked ones.
- How does a lockstep core help safety, and what failures can it not catch?
- Design an MCAL driver interface for a CAN FD controller.
- Where should keys live in an ECU, and how do you provision them in production?
- What does a safety manual expect from the software that runs on a safety MCU?
- How do you test that a watchdog and safe state really trigger on faults?
Your prep playlist
Design rounds to practise
Themes are inferred from Infineon's public product lines.
Take an AI mock round styled on Infineon, with follow-ups that probe what you missed.
Start a mock round