Software Engineer to deep Tech / High-Performan... Senior Developer · Copenhagen · Hybrid

iHeadHunt; København; On-site; DKK 600,000 - 800,000; Full time

Benefits offered by this job

Hybrid work flexibility

Flat engineering culture

Strong technical ownership

Job summary

iHeadHunt is seeking a Software Development Engineer in Copenhagen. This full-time role involves optimizing low-level C code and working on networking solutions. You'll collaborate closely with R&D teams to enhance performance and scalability in modern cloud infrastructures. Ideal candidates will have experience in C/C++ on Linux and embedded software development. The position offers hybrid work flexibility, enabling a balance between home and office work.

Qualifications

• Experience in high-performance C development.
• Familiarity with Linux system software.
• Knowledge of hardware-near programming.
• Expertise in networking and datapath technologies.
• Proven ability in performance optimization.

Responsibilities

• Develop high-performance software in C on Linux.
• Manage hardware bring-up and board management.
• Handle network offloading and packet processing.
• Work with low-level interfaces like I2C and SPI.
• Perform system architecture optimizations and tooling automation.

Skills

C/C++ on Linux

Embedded or hardware-near software

Networking or system-level development

Performance-critical software

Python scripting

Tools

DPDK

Kernel-space development

FPGA-based systems

Device drivers

High-speed networking

Job description

Do you enjoy working close to hardware, optimizing low-level C code, and solving complex performance challenges?

We are looking for a Software Development Engineer to join a highly specialized R&D team developing next-generation high-performance networking and acceleration solutions used in modern cloud infrastructure and AI/datacenter environments.

This role sits right at the intersection of:

• High-performance C development
• Linux system software
• Hardware-near programming
• Networking and datapath technologies
• FPGA-based acceleration platforms

What you’ll work on

• High-performance software in C on Linux
• Hardware bring-up and board management
• Network offloading and packet processing
• Low-level interfaces such as I2C, SPI and flash devices
• Performance optimization and system architecture
• Automation and tooling in Python

You’ll work closely with both software and hardware engineers in a deeply technical environment where your code directly impacts performance, scalability, and efficiency.

We’re looking for engineers with experience in

• C/C++ on Linux
• Embedded or hardware-near software
• Networking or system-level development
• Performance-critical software
• Python scripting

Bonus points for

• DPDK
• Kernel-space development
• FPGA-based systems
• Device drivers
• High-speed networking

Why join?

• Work on cutting-edge deep-tech products
• Strong technical ownership
• Flat engineering culture
• Highly skilled R&D environment
• Real impact on products used globally

Greater Copenhagen area

International engineering environment

Full-time position and hybrid work flexibility