Andersen is hiring a System Engineer (Voice) in Europe to support a large-scale digital transformation, working on telecommunications, cloud platforms, and AI-driven solutions for global digital services.  The customer is a large international technology company operating in the digital infrastructure and connectivity domain, providing telecommunications, cloud platforms, and advanced IT services for consumer and enterprise clients. The organization focuses on next-generation networks, cloud-native architectures, artificial intelligence, and cybersecurity, working with complex distributed systems, and continuously modernizing core services to support global digital transformation.  The project is a large-scale digital transformation initiative with a high volume of parallel projects, focused on building and evolving web and e-commerce platforms, AI-enabled features, and data-driven digital solutions within a dynamic, multi-team environment.  Responsibilities: - Diagnosing, troubleshooting, and resolving complex hardware, software, and network issues related to voice communication systems (e.g., call quality, connectivity, latency, and system outages). - Proactively monitoring the performance and health of voice networks using specialized tools to identify potential bottlenecks or problems before they impact users.  - Performing regular, scheduled maintenance, updates, and patching of equipment and software. - Providing expert support from a remote (offshore) location. - Maintaining detailed and accurate documentation of all incidents, troubleshooting steps, configurations, and resolutions.  - Participating in post-incident reviews (Root Cause Analysis) to prevent recurrence and improve future processes. - Assisting with the planning, testing, and implementation of new voice system features, upgrades, or integrations with existing IT infrastructure (e.g., email, CRM, network security). - Providing guidance and training to junior staff or end-users on voice system functionality, new procedures, and best practices. - Implementing and maintaining security protocols (firewalls, access controls) and ensuring all voice systems comply with relevant industry standards and regulations.  Must-haves: - Experience as a System Administrator or in a similar role for 3+ years. - Expertise in system administration of Session Border Controllers (SBC), ideally with the vendor AudioCodes. - Deep knowledge of VoIP protocols (SIP, RTP, H.323), PBX and Unified Communication (UC) platforms (e.g., Cisco Call Manager, Avaya), network infrastructure (LAN/WAN, firewalls, QoS), and relevant operating systems. - General understanding of common protocols such as SIP, RTP, TCP, UDP, etc. - Excellent analytical and problem-solving abilities to quickly diagnose complex issues under pressure. - Strong verbal and written communication skills to effectively communicate with both technical and non-technical stakeholders, clients, and vendors. - Level of English – from Advanced and above.  Nice-to-haves: - Knowledge of German. - Strong knowledge of Microsoft Teams Phone. - Experience working in a service desk environment with a high level of customer orientation. - Technical expertise in telephony (e.g., Cisco, Mitel, Avaya). - Scripting experience with PowerShell. - Troubleshooting skills in telephony and network environments. - Willingness to participate in a 24/7 on-call rotation.  Reasons why this job would be interesting to you: - Experience in teamwork with leaders in FinTech, Healthcare, Retail, Telecom, and others. Andersen cooperates with such businesses as Samsung, Siemens, Johnson & Johnson, BNP Paribas, Ryanair, Mercedes, TUI, Verivox, Allianz, T-Systems, etc.; - The opportunity to change the project and/or develop expertise in an interesting business domain; - Job conditions – you can work both fully remotely and from the office or can choose a hybrid variant; - Guarantee of professional, financial, and career growth! The company has introduced systems of mentoring and adaptation for each new employee; - The opportunity to earn additional up to 1,000 USD per month by participating in the company's activities; - Access to the corporate training portal, where the entire knowledge base of the company is collected and which is constantly updated; - Bright corporate life (parties / pizza days / PlayStation / fruits / coffee / snacks / movies); - Certification compensation (AWS, PMP, etc); - Referral program; - English courses; - Private health insurance and compensation for sports activities. Your personal data is protected in accordance with GDPR regulations. Learn more: https://andersenlab.com/privacy-policy  Join us!    https://people.andersenlab.com/