Senior C++ Developer

Senior C++ Developer

Atos

Osijek, Croatia

Key Responsibilities

• Develop and maintain mission‑critical, telco‑grade applications;
• Implement and enhance low‑level communication protocols (SIP, RTP, SRTP, RTCP);
• Build high‑performance server‑ and client‑side modules with strong security and reliability requirements;
• Contribute to distributed system architecture improvements;
• Own the full development lifecycle: design, coding, testing, documentation;
• Support CI/CD pipelines and DevOps practices;
• Collaborate with international teams (primarily Croatia-based) within an agile environment;
• Maintain accurate technical documentation and design materials.

Mission 1: Design:

• Analyze requirements and user stories; define acceptance criteria;
• Design components for distributed, high‑availability systems;
• Assess feasibility, risks, and technical dependencies.

Mission 2: Development & Execution:

• Develop software components in C++ or a similar OO language;
• Implement communication stacks (SIP, RTP, RTCP, SRTP);
• Build and optimize Linux‑based distributed applications using containers and virtualization;
• Integrate message brokers (Kafka, RMQ);
• Debug using system‑level tools (gdb, profilers);
• Apply secure coding practices and support CI/CD pipelines.

Mission 3: Quality Assurance & Reporting:

• Ensure code quality through testing and reviews;
• Troubleshoot system issues and support root‑cause analysis;
• Work with QA on test campaigns when required;
• Maintain essential technical documentation;
• Monitor quality metrics and propose improvements.

Mission 4: Team & Process Participation:

• Actively participate in Scrum ceremonies;
• Collaborate with cross‑functional international teams;
• Contribute to continuous improvement of engineering and DevOps practices;
• Share knowledge and support onboarding of new team members;
• Deliver work reliably and on time.

Requirements

• Degree in CS, Software Engineering, Electrical Engineering, or similar;
• 5–10+ years of professional software development experience;
• Strong expertise in C++ and system‑level programming;
• Solid knowledge of Linux development and debugging.

Experience with:

• Docker, Kubernetes;
• VMware, Proxmox, KVM;
• Kafka, RabbitMQ;
• CI/CD, Git, DevOps workflows;
• Distributed systems & network communication;
• Experience with communication protocols (SIP, RTP, SRTP, RTCP, RTSP);
• Familiarity with secure protocols and cybersecurity concepts is a plus;
• Excellent communication in English; French or German is a plus;
• Strong teamwork, problem‑solving, and analytical thinking;
• Ability to work independently on complex technical tasks; proactive and adaptable mindset.