Low Level Networking Developer (C/C++)

About Altimi

Altimi is a technology acceleration partner with impressive experience spanning over 20 years, specializing in the successful delivery of software development projects for international customers. We are based in Poland. Our main area of operation is the DACH region and Scandinavia, where we are known for providing top-notch software development services.

Our primary focus are managed services for companies seeking to accelerate growth, solve complex tech problems, build MVP/POC and/or modify legacy infrastructures.

The main area of competence include Product & Application Engineering, DevOps, Cloud Security & Managed Services and AI & Data Enablement.  

Role Overview

The project focuses on building advanced cybersecurity and IT infrastructure components, including secure communication foundations used by higher-level control interfaces.

You will be responsible for working with an existing C-based networking framework deployed on multiple Unix-like platforms (Linux, BSD, macOS, iOS). The role emphasizes analysis, adaptation, and enhancement of a low-level networking stack, as well as supporting its integration with higher-level system components, rather than greenfield development.

• Analyze and understand an existing low-level networking framework written in C
• Modify and extend the framework to meet new requirements
• Consult and collaborate closely with iOS developers on integration aspects
• Review networking design decisions and provide expert guidance
• Optionally design and implement new networking features or improvements
• Ensure robustness, performance, and security of networking components

• Strong professional experience in C and/or C++
• Proven experience implementing low-level networking (sockets, protocols, concurrency, performance tuning)
• Hands-on experience with Unix-like operating systems (any of: Unix, BSD, Linux, macOS, iOS)
• Solid understanding of network protocols and system-level APIs
• Ability to analyze existing codebases and work with legacy systems
• Comfortable working in a consulting-style role, advising other engineers

Nice to have

• Experience with iOS internals or networking on iOS
• Background in security-sensitive systems, secure communication, or infrastructure software
• Familiarity with certificate-based authentication or provisioning mechanisms

• Join for a role, stay for the development: More than 40% of our team is working with us longer than 5 years. Explore diverse domains, projects and modern technologies through internal mobility.
• Learn from the best: Almost 60% of all our colleague has over 10 years of professional experience.
• Flexibility: Work fully remotely, full-time from our office in Wroclaw or in a hybrid model.
• Practical benefits: private medical care, life insurance, sport card, English and German classes in small, online groups.