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Medtronic embedded interview prep

Medical devices. Embedded teams here focus on a fault-tolerant state machine for a safety-critical medical device.

Medical devicesIndia hiring: MediumSafety and standards C, memory and debugging RTOS and concurrency Embedded Linux

Roles they hire for

Firmware engineer for safety-critical devices
Embedded software engineer (Class III, Cortex-M33)
Embedded Linux engineer

What they emphasise

State-machine firmware for safety-critical, fault-tolerant real-time systems
IEC 62304, ISO 14971 and ISO 13485 deliverables
Software failure mode and effects analysis
Armv8-M (Cortex-M33) for Class III devices

Brush up on

IEC 62304ISO 14971IEC 60601-1Software FMEAState machinesArmv8-M TrustZone

How the rounds usually run

A typical regulated product loop for embedded roles. Companies vary by team and seniority.

Recruiter or hiring-manager screen

Background in regulated or safety-critical work
Role fit

Example: Have you worked under a formal development process? Which one?

Technical 1: C, RTOS and state machines

Embedded C and RTOS fundamentals
State machine design and implementation

Example: Implement a table-driven state machine in C and explain how you'd test every transition.

Technical 2: Safety and design

Fault detection, safe states and recovery
Risk analysis and software FMEA
Verification and traceability

Example: How would you detect a stuck sensor reading?

Panel: cross-functional

Working with systems, hardware and quality engineers
Handling changes under change control

Example: A hardware change lands late. How do you assess its impact on certified firmware?

HR

Motivation and values
Logistics

Example: Why do you want to work on medical or industrial devices?

Practice questions

Original questions written for Medtronic's focus areas, not leaked ones.

Design the fault handling for an infusion pump's motor control: what's a safe state, and how do you get there from any failure?
How does IEC 62304 change how you write, review and test a firmware change?
Walk through a software FMEA for a sensor reading path.
How would you detect and handle RAM or flash corruption at runtime in a Class III device?
Explain how requirements, design, code and tests stay traceable to each other in your process.

Your prep playlist

UART receive ring bufferDrivers & ISRs · Medium · 4 bugs · ~6 min Tick timeouts and delaysTiming · Warm-up · 3 bugs · ~4 min Integer promotion trapsMemory & C · Medium · 3 bugs · ~5 min Periodic control loopRTOS · Medium · 3 bugs · ~5 min Flags shared with an ISRDrivers & ISRs · Medium · 2 bugs · ~5 min Data retained across resetsBoot & OTA · Hard · 3 bugs · ~6 min Nested mutexes under loadRTOS · Hard · 3 bugs · ~8 min Task check-in watchdogRTOS · Medium · 3 bugs · ~7 min OS sanity watchdog hooksRTOS · Hard · 3 bugs · ~7 min

Design rounds to practise

Fail-safe OTA for a cellular sensorDesign round · Medium · ~35 min Power-fail-safe event log on NOR flashDesign round · Medium · ~30 min Task health monitoring and watchdog strategyDesign round · Medium · ~30 min Linux driver for an FPGA data-acquisition blockDesign round · Hard · ~40 min

Sources

Take an AI mock round styled on Medtronic, with follow-ups that probe what you missed.

Start a mock round