About us

NET CHECK GmbH was founded in 1999 with the aim of improving the quality of communication networks. Since then, NET CHECK has developed into the leading partner of network operators and infrastructure providers of mobile and fixed networks of all technologies. Its core competencies include international network benchmarking (comparative measurements) as well as network planning and fault analysis. NET CHECK has one of Germany's largest crowdsourcing platforms, which generates over 144 million data points every day. Our commitment to quality and security has earned us the trust of scientific and government institutions.
NET CHECK is headquartered in Berlin and is part of the NC GROUP, an owner-managed group of companies with a total of over 180 employees at five locations in Germany and one in Belgrade, Serbia. 

Job Summary: We are looking for an experienced Senior Software Engineer with a strong background in developing high-performance, real-time, and data-intensive software applications.
The ideal candidate has solid experience in Python, C++, and/or Go (Golang), together with a strong understanding of software architecture, distributed systems, and complex data processing. You will be responsible for designing, developing, and maintaining scalable and reliable software solutions, contributing to technical architecture, and promoting engineering best practices.

Responsibilities

• Design, develop, and maintain high-performance software applications and services using Python, C++, and/or Go.
• Develop real-time and near-real-time software applications and services for data processing, analysis, monitoring, and integration.
• Design and implement efficient solutions for binary data processing, parsing, serialization, deserialization, and handling complex data formats.
• Design, develop, and maintain scalable software architectures, distributed systems, and microservices.
• Analyze and optimize application performance, including latency, throughput, memory consumption, and resource utilization.
• Apply performance profiling, benchmarking, and debugging techniques to identify and resolve software bottlenecks.
• Develop and maintain CI/CD pipelines, automated testing frameworks, and software deployment processes.
• Build, deploy, and maintain containerized applications using Docker and Kubernetes.
• Perform software testing, debugging, log analysis, performance profiling, and system-level troubleshooting.
• Collaborate with software developers, system engineers, architects, and product managers to deliver high-quality software solutions.
• Contribute to technical architecture decisions, software design reviews, code reviews, and continuous improvement of engineering practices.

Your profile

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field.
• 5 or more years of professional software development experience, preferably in developing high-performance, real-time, or data-intensive applications.
• Strong programming skills in at least one of the following languages: Python, C++, or Go (Golang).
• Good understanding of multithreading, concurrency, asynchronous programming, and performance optimization techniques.
• Hands-on experience with binary data processing, parsing, serialization, deserialization, and complex data formats.
• Solid understanding of software architecture, distributed systems, microservices, and software design principles.
• Practical experience with Docker and familiarity with Kubernetes and container orchestration.
• Experience with CI/CD pipelines, automated testing, version control, and software development best practices.
• Good knowledge of Linux environments and system-level debugging and troubleshooting.
• Familiarity with cloud platforms, preferably AWS.
• Familiarity with messaging, event-driven architectures, and streaming technologies.
• Ability to work independently, take technical ownership, and collaborate effectively within a multidisciplinary engineering team.

We Offer

• Employment Type: Full-Time, indefinite term.
• A dynamic team characterized by creativity, collaboration, and technical excellence, creating an innovative workplace.shape 
• Flexible working hours.
• 28 vacation days.
• Health & Sports Subsidy: Sports membership subsidy.
• Public Transportation Subsidy: Monthly subsidy for a Germany-wide ticket.
• Bicycle leasing via JobRad.
• Regular Team Events.