Senior C++ Network Engineer

Founded in 1999 in Vienna, the Qualysoft Group is a manufacturer-independent IT consulting and services company, which successfully provides support for its international customers with the aim of boosting their competitiveness and economic efficiency through innovative IT solutions.

Its focus is on financial services providers, telecommunications companies, the automotive industry and energy service providers. Over 400 employees in 6 subsidiaries work together to ensure state of the art solutions for our clients.

We are looking for new colleagues in Qualysoft teams for diverse projects providing continuous learning opportunities. Our common goal is to provide honesty, development and a stable background while getting to know the latest technologies. We are waiting for your application for the position below!

Our client is seeking a highly experienced Senior C++ Networking Subject Matter Expert to join a global engineering team responsible for building and evolving next-generation high-performance networking and communication infrastructure.

This role focuses on modern C++ development, low-latency networking, distributed systems, and reusable platform capabilities used across large-scale enterprise environments. The successful candidate will contribute to the design and development of core networking libraries, help shape technical strategy, and collaborate closely with infrastructure, security, and application engineering teams.

This is an excellent opportunity for an engineer who enjoys working deep within the technology stack, solving complex performance and scalability challenges, and influencing engineering direction through hands-on technical leadership.

Responsibilities:

Design, develop, and maintain high-performance C++ networking libraries and frameworks.
Define and drive technical direction for reusable networking and communication capabilities.
Research, evaluate, and prototype emerging technologies for future platform adoption.
Collaborate with infrastructure, networking, and security teams to ensure robust platform integration.
Identify technology gaps and recommend scalable, practical solutions that enhance performance, resilience, and developer productivity.
Partner with application development teams to gather requirements and support successful adoption of platform capabilities.
Analyze and improve application performance, reliability, and scalability.
Maintain and enhance existing C++ platform components and shared libraries.
Champion engineering best practices across the broader C++ development community.
Provide technical leadership through design reviews, mentoring, coaching, and knowledge sharing.

Requirements:

Extensive hands-on experience in modern C++ development.Deep understanding of distributed systems and low-latency architecture design.Strong expertise in networking technologies including:
- TCP/IP
- HTTP / HTTPS
- TLS / mTLS
- Connection management
- Load balancing
- Service discovery
Network resiliency patterns
Strong Linux systems knowledge.Experience designing and developing reusable libraries, frameworks, or platform components.Advanced debugging, profiling, troubleshooting, and performance optimization skills.Ability to collaborate effectively with engineering, infrastructure, and platform teams.Excellent written and verbal communication skills.

Advantages:

Experience with modern C++ standards (C++17, C++20, and/or C++23).
Background in low-latency, high-throughput, or mission-critical networking systems.
Python or other scripting language experience.
Knowledge of build systems, toolchains, and software packaging infrastructure.
Experience with containers and Kubernetes.
Understanding of authentication and authorization technologies.
Exposure to cloud-native or hybrid infrastructure environments.
Experience within financial services, telecommunications, or other highly technical engineering environments.

Why we think you will love working here:

With us you count as a person, our doors are always open.

We live the Qualysoft Team Spirit and stand for transparency!

Fresh wind and new ideas are welcome, because standstill is a foreign word at Qualysoft.

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