Senior Voip Engineer

Our client is a company based in Switzerland with offices in Barcelona and which purpose is to improve people’s lives and health.

You will be reporting to the Head of IT Support and Cloud platform Solutions and in this role, you will be responsible for the VoIP and Microsoft 365 application environment, focusing on its technical operations, maintenance, and continuous development. You will drive adoption and training across the business, manage business projects, and act as an evangelist for VoIP solutions, collaborating closely with the business stakeholders.

You will bring strong experience in voice and telephony technologies, with a particular focus on modernizing and migrating traditional telephony solutions to cloud-based communication platforms, including Microsoft Teams Phone. You will contribute to the design, implementation, and ongoing operation of our cloud-based voice and telephony environment and support the business in adopting modern communication solutions. In addition you will gather and incorporate user feedback, develop and provide effective solutions, introduce new features, and continuously evolve our Microsoft 365 platform environment., Develop our Microsoft Teams Telephony Services and Telephony Infrastructure: Microsoft Teams Telephony Services: Administration and Product Ownership of Microsoft Teams telephony services.

• Telephony Infrastructure Migration: Ability to plan and execute migrations from on-premises SBC infrastructure to cloud-based telephony solutions.

• Number Inventory Management: Management and maintenance of the telephone number inventory, including allocation, tracking, and administration.

• Call Flow Expertise: Understanding and management of Microsoft Teams call flows, including Auto Attendants and Call Queues.

• Microsoft Teams Telephony Features: In-depth understanding of telephony features and capabilities within Microsoft Teams clients.
• Develop our Microsoft 365 platform including Microsoft Power Automate/Power Apps, SharePoint, Microsoft Teams, Microsoft Intune, and Microsoft 365 apps.
• Drive and support user adoption to support the rollout of Microsoft 365 across the global organization.
• Bring our Microsoft 365 platform to the next level and integrate new features.
• Take responsibility for business projects and lead their implementation.
• Engage with our business users, power users, Marketing & Communications to drive Microsoft 365 user engagement.
• Provide 3rd level support for Microsoft 365.

• Conduct research on complex cases, validate cases for escalation, and contribute to knowledge management initiatives.

• Bring experience and expertise in telephony solutions, with a focus on supporting and modernizing the company’s telephony environment and contributing to the migration of telephony services to cloud-based solutions., Randstad’s ambition is to be the world’s most equitable and specialized talent company. We help talent and organizations unlock their true potential by seeking responsible opportunities that drive long-term economic sustainability, prioritizing the well-being of people and the planet.

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publicada el 11/11/2026 · 240 visitas y 2 inscritos

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5+ years proficient hands-on experience with Microsoft Teams Telephony Services and Telephony Infrastructure. Additionally Microsoft 365 administration and architecture across Teams, SharePoint, OneDrive, Exchange Online, Intune and Microsoft 365 Apps.

• Strong automation and scripting skills, preferably PowerShell and Microsoft Graph
• Advanced troubleshooting and 2nd/3rd-level support experience
• Supporting development and delivery of training programs
• Excellent English skills
• Strong problem-solving and analytical skills.
• Excellent communication and teamwork abilities.
• Ability to manage multiple tasks and projects simultaneously.
• Self-motivated with a passion for continuous learning and improvement.

Flexible compensation

• Health & well-being: Fully company-paid private health insurance
• 30 working days of annual paid vacation
• Flexibility & balance: Flexible start time between 8:00 AM and 9:30 AM (1-hour lunch break)
• Continuous training