AKKODIS Embedded Engineer Interview Guide 2026

What is a Embedded Engineer at AKKODIS?

As an Embedded Engineer at AKKODIS, you are at the forefront of developing critical solutions that power the real world. Your work will directly impact industries where reliability, performance, and security are non-negotiable—ranging from smart energy systems and IoT sensors to advanced defense technology, maritime systems, automotive innovations, and life-saving medical equipment. This is not a role where you will be hidden in a back office writing abstract code; your projects will be deployed into physical environments where software meets hardware in real time.

What makes this position uniquely exciting at AKKODIS is our absolute commitment to cross-functional synergy. We do not believe in silos. Whether your core expertise lies in hardware, software, or FPGA development, you will collaborate deeply across disciplines. You will be part of a robust professional environment of over 100 developers in Norway—spanning offices in Høvik, Kongsberg, Bergen, and Stavanger—while simultaneously being backed by a global network of 50,000 experts.

Depending on your specific track, you will own the full product lifecycle. From the initial conceptualization and prototyping to rigorous lab testing, validation, and final deployment, you will drive technical choices that matter. Whether you are optimizing low-level drivers for a resource-constrained defense application or designing high-speed PCB subsystems for next-generation chargers, your contributions will define the safety, efficiency, and success of our clients' most critical products.

Common Interview Questions

The questions below represent the types of technical and behavioral inquiries you will face. They are designed to test your fundamental knowledge, your hands-on debugging experience, and your ability to design robust systems. Use these to identify patterns in how AKKODIS evaluates candidates.

C/C++ & Low-Level Programming

This category tests your mastery of the languages that drive embedded systems, focusing on memory safety and hardware interaction.

What does the volatile keyword do, and when must you use it in embedded programming?
Write a macro or an inline function to set, clear, and toggle a specific bit in a 32-bit register.
Explain the differences between malloc and static allocation. Why is dynamic memory allocation often avoided in critical embedded systems?
How do you prevent and detect memory leaks in a C application?
Explain the concept of struct packing and padding. Why does it matter when transmitting data over a network or a serial bus?

RTOS & System Architecture

Here, interviewers assess your ability to manage concurrency, timing constraints, and system resources.

Explain priority inversion. How does a priority inheritance protocol solve it?
Walk me through the lifecycle of an interrupt. What should and shouldn't you do inside an ISR?
How do you choose between a bare-metal architecture, an RTOS, and Embedded Linux for a new IoT sensor project?
Describe how you would implement inter-task communication in a system with strict real-time deadlines.
What is a watchdog timer, and how do you properly implement it in a multi-threaded application?

Hardware Interfacing & Debugging

These questions evaluate your practical lab skills and your ability to troubleshoot across the hardware/software boundary.

You have written an SPI driver, but the peripheral is not responding. Walk me through your debugging process from software to the physical pins.
What are the main differences between I2C and SPI? When would you choose one over the other?
How do you debug a hard fault on an ARM Cortex-M microcontroller?
Explain how you would verify the timing constraints of a newly integrated hardware component using an oscilloscope.

Behavioral & Cross-Functional Collaboration

AKKODIS highly values teamwork. These questions test how you navigate project pressures and interdisciplinary challenges.

Tell me about a time you disagreed with a hardware engineer about the source of a bug. How did you resolve it?
Describe a situation where you had to compromise on a technical implementation to meet a strict project deadline.
How do you ensure your code is understandable and maintainable for engineers who might take over the project years from now?
Tell me about a time you had to learn a completely new technology or protocol on the fly to deliver a project.

See every interview question for this role

Practice questions from our question bank

Curated questions for AKKODIS from real interviews. Click any question to practice and review the answer.

Medium

Coding

Understanding Mutex vs Binary Semaphore

Compare mutexes and binary semaphores in real-time operating systems.

Easy

Coding

Understanding Interrupt Service Routines in Embedded Systems

Explain the role of an Interrupt Service Routine in embedded systems and its significance.

Easy

Coding

Clean Safe Embedded C Practices

Explain how to write clean, safe C/C++ for embedded systems, including memory safety, hardware access, and defensive coding.

Arrays

Bit Manipulation

Medium

Coding

Understanding the Volatile Keyword in Concurrency

Explain the purpose of the volatile keyword in concurrent programming and its implications.

Bit Manipulation

Easy

Coding

Understanding the OSI Model Layers

Describe the OSI model and the function of each layer.

Easy

Coding

Answering Embedded Systems Questions

Explain how to answer embedded systems interview questions with a structured approach, trade-offs, and concrete examples.

Arrays

Bit Manipulation

Math

Easy

Coding

Bitwise Register Bit Manipulation

Explain how to set, clear, toggle, and read specific bits in a register using bitwise operations.

Arrays

Bit Manipulation

Medium

Coding

Understanding Hardware Abstraction Layers in Embedded Systems

Explain the role and importance of a hardware abstraction layer in embedded systems.

Medium

Coding

IPsec vs TLS in Embedded Systems

Discuss the differences between IPsec and TLS and their use cases in embedded devices.

Medium

Coding

Longest Unique Messenger Substring

Use a sliding window and hash map to find the longest substring without repeated characters in a Messenger text.

Strings

Hash Tables

Two Pointers

Easy

Coding

Validate Google C++ Brackets

Implement a stack-based validator that checks whether a source string has balanced brackets in O(n) time.

Arrays

Hash Tables

Medium

Behavioral & Leadership

Navigating Ambiguity Across XFN Teams

Tests leading through ambiguity across firmware, hardware, and product teams by creating clarity, aligning stakeholders, and delivering measurable results.

Dealing With Ambiguity

Communication

Stakeholder Management

Hard

Coding

Serialize and Deserialize Binary Tree

Problem In a Meta interview setting, you may need to send a binary tree between services used by products like Messenger or Instagram. Implement two functi...

Trees

Recursion

Queue

Hard

ML System Design

Design ML-Driven OTA Rollout

Design an ML system for Meta-scale OTA firmware rollout that selects devices, ranks update risk, and handles power-loss recovery securely.

Feature Store

Model Serving

Cold Start

Medium

Security & Infrastructure

Priority Inversion in Device Firmware

Explain priority inversion in Meta embedded firmware and how priority inheritance or related RTOS techniques prevent high-priority security tasks from missing deadlines.

Infrastructure

Easy

Coding

Detect Cycle in Linked List

Use Floyd’s two-pointer algorithm to determine whether a singly linked list contains a cycle.

Hash Tables

Linked Lists

Two Pointers

Easy

Coding

Reverse a Singly Linked List

Reverse a singly linked list in place using pointer manipulation with O(n) time and O(1) extra space.

Linked Lists

Recursion

Easy

Coding

Hardware Register Bit Operations

Implement bit manipulation helpers to set, clear, toggle, and read specific bits in a register value.

Arrays

Bit Manipulation

Hard

Pipelines

Design Accelerometer Telemetry Pipeline

Design a high-throughput accelerometer telemetry pipeline from embedded device buffers to Meta cloud storage and stream processing with low loss and replay safety.

Batch Processing

Stream Processing

Orchestration

Easy

Coding

Two Sum in Telemetry Buffer

Find two indices in an array whose values sum to a target using a hash table in O(n) time.

Arrays

Hash Tables

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Getting Ready for Your Interviews

Thorough preparation requires more than just brushing up on syntax. You need to demonstrate a holistic understanding of how embedded systems operate under strict constraints. Your interviewers will look for a blend of deep technical expertise and the ability to view a product from a systems-level perspective.

Role-Related Technical Knowledge Interviewers will evaluate your mastery of the tools and languages required for your specific domain (e.g., C/C++, RTOS, Embedded Linux, or VHDL/Verilog). You must demonstrate an ability to write efficient, safe, and maintainable code or hardware designs specifically tailored for resource-constrained platforms.

System-Level Problem Solving In embedded systems, issues rarely live in isolation. You will be assessed on how you debug complex problems that span across software, hardware, and FPGA boundaries. Strong candidates will show a methodical approach to identifying bottlenecks, utilizing lab equipment, and resolving integration faults.

Quality and Reliability Focus Because AKKODIS builds systems for defense, maritime, and medical sectors, quality is paramount. You must show a strong commitment to rigorous testing (unit and integration), CI/CD pipelines, and comprehensive documentation to ensure absolute reliability in the field.

Cross-Functional Collaboration You will be evaluated on your ability to communicate complex technical concepts to colleagues in adjacent disciplines. Interviewers want to see that you can read a schematic even if you are a software engineer, or understand software constraints if you are a hardware designer.

Interview Process Overview

The interview process for an Embedded Engineer at AKKODIS is designed to be rigorous but highly conversational. We want to understand not just what you know, but how you think when faced with real-world engineering challenges. The process typically moves at a steady pace, prioritizing a deep mutual understanding over trick questions. You will engage directly with senior engineers and technical leads who actively work on the projects you might join.

Expect a strong emphasis on practical scenarios. Instead of whiteboard algorithm puzzles, you will likely be asked to walk through past projects, explain your architectural decisions, and troubleshoot hypothetical (or real) system failures. Because we hire for both permanent R&D roles and our B2B/Freelance Embedded Pool, the process will also gauge your autonomy, your ability to integrate into established teams quickly, and your alignment with our core values of collaboration and continuous learning.

This visual timeline outlines the typical stages of your interview journey, from the initial recruiter screening to the final technical and behavioral rounds. Use this to pace your preparation, ensuring you are ready to discuss high-level career goals early on, before diving deep into technical and system-level specifics during the onsite or virtual technical panels.

Deep Dive into Evaluation Areas

To succeed, you must prove your competence across several critical technical and behavioral dimensions. Here is exactly what the technical panels will focus on.

Embedded Software & Firmware Development

If you are pursuing the software track, this is the core of your evaluation. Interviewers need to know that you can write robust, highly optimized code that interacts directly with hardware.

You must be intimately familiar with memory management, pointer arithmetic, and the constraints of running code on microcontrollers. Strong performance here means writing code that is not only functional but safe and predictable.

Be ready to go over:

C/C++ Fundamentals – Deep dive into pointers, memory allocation, volatile keywords, and bitwise operations.
RTOS & Real-Time Constraints – Task scheduling, mutexes vs. semaphores, priority inversion, and interrupt service routines (ISRs).
Embedded Linux – Board Support Packages (BSP), writing and modifying device drivers, and kernel-space vs. user-space interactions.
Advanced concepts (less common) – Integrating Rust into legacy C/C++ codebases, advanced Yocto project configurations.

Example questions or scenarios:

"Walk me through how you would implement a thread-safe UART driver in an RTOS environment."
"How do you handle memory leaks in a system that cannot be dynamically allocated?"
"Explain the difference between a spinlock and a mutex, and when you would use each in an embedded Linux driver."

Hardware/Software Integration & Debugging

At AKKODIS, software does not exist in a vacuum. You will be evaluated on your ability to bridge the gap between code and physical circuitry.

Interviewers want to see that you are comfortable in a lab setting. You should be able to read basic schematics, understand timing diagrams, and use hardware tools to prove whether a bug is in the software or the hardware.

Be ready to go over:

Communication Protocols – Deep understanding of I2C, SPI, UART, CAN, and Ethernet.
Lab Equipment – Practical use of oscilloscopes, logic analyzers, and multimeters to debug signals.
Signal Integrity & EMC – Understanding how hardware design choices impact software performance and vice versa.

Example questions or scenarios:

"You are reading a temperature sensor via I2C, but the data is occasionally corrupted. Walk me through your debugging steps using both software and a logic analyzer."
"How do you handle debouncing a physical button press in software versus hardware?"

Tip

**Know Your Track:** While cross-functional knowledge is required, your technical deep dive will heavily index on your primary domain. If you are applying for the FPGA track, expect heavy focus on VHDL/Verilog, timing analysis, and testbenches instead of C-level driver development.

System Architecture & Testing

Because our solutions operate in critical sectors like defense and medical, architecture and testing are heavily scrutinized.

You will be evaluated on how you structure an embedded application for scalability and testability. Strong candidates will advocate for automated testing and CI/CD, even in hardware-dependent environments.

Be ready to go over:

Unit & Integration Testing – Mocking hardware interfaces, Test-Driven Development (TDD) in C/C++.
CI/CD Pipelines – Automating builds, static analysis, and Hardware-in-the-Loop (HIL) testing.
System Design – Partitioning responsibilities between hardware, FPGA, and software.

Example questions or scenarios:

"Design the software architecture for a battery management system in a next-generation charger."
"How do you set up a CI/CD pipeline for a project that requires physical hardware for integration testing?"

Key Responsibilities

As an Embedded Engineer, your day-to-day work will be highly dynamic and deeply technical. If you are on the software track, you will spend your time designing and developing in C/C++ (and occasionally Rust) for resource-constrained platforms. This includes writing low-level drivers, configuring RTOS or embedded Linux environments, and relentlessly optimizing for performance and power consumption. If you are on the hardware or FPGA tracks, your days will involve PCB design, VHDL/Verilog coding, timing analysis, and ensuring EMC compliance.

Regardless of your track, you will not work in isolation. You will collaborate daily with cross-functional teams, sitting down with hardware engineers to review schematics or working with FPGA developers to define register maps. You will actively participate in lab verifications, using oscilloscopes and logic analyzers to validate that your software behaves correctly with the physical prototypes.

You will also be responsible for the less glamorous but equally critical aspects of engineering: writing unit and integration tests, maintaining CI/CD pipelines, and producing the rigorous documentation required for industries like defense and healthcare. For senior candidates and those in the B2B Embedded Pool, you will also be expected to drive technical architectural choices, mentor junior colleagues, and act as a reliable partner to our clients.

Role Requirements & Qualifications

To be successful as an Embedded Engineer at AKKODIS, you need a solid foundation in engineering principles paired with specific technical competencies.

Must-have skills
- A Bachelor’s or Master’s degree in Electronics, Computer Engineering, Cybernetics, Computer Science, or a related field.
- Fluency in both Norwegian and English (written and spoken).
- Deep proficiency in your core domain (e.g., C/C++ for software, VHDL/Verilog for FPGA, or PCB design for hardware).
- Strong understanding of RTOS, Embedded Linux, and hardware-adjacent interfaces.
- Norwegian citizenship or permanent residency, with the ability to obtain security clearance (critical for defense-related projects).
Nice-to-have skills
- Experience with Rust in embedded environments.
- Familiarity with modern CI/CD toolchains and automated hardware-in-the-loop (HIL) testing.
- Prior experience in industrial, defense, maritime, or medical embedded software.
- For the Embedded Pool (freelance): An established ENK or AS (Norwegian registered company).
Soft skills
- High degree of curiosity and a continuous learning mindset.
- Strong communication skills to bridge the gap between different technical disciplines.
- A structured, quality-conscious approach to development and documentation.

Interview Guides

AKKODIS

What is a Embedded Engineer at AKKODIS?

Common Interview Questions

C/C++ & Low-Level Programming

RTOS & System Architecture

Hardware Interfacing & Debugging

Behavioral & Cross-Functional Collaboration

See every interview question for this role

Practice questions from our question bank

Sign up to see all questions

Getting Ready for Your Interviews

Interview Process Overview

Deep Dive into Evaluation Areas

Embedded Software & Firmware Development

Hardware/Software Integration & Debugging

Tip

System Architecture & Testing

Key Responsibilities

Role Requirements & Qualifications

Note

Frequently Asked Questions

Other General Tips

Summary & Next Steps

See every interview question for this role