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Senior Network Engineer

Five9

Porto, Portugal (Hybrid) (Portugal) Remote permanent

Posted: April 27, 2026

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Quick Summary

Join us as a Senior Network Engineer in Porto, Portugal to shape and expand the global network infrastructure for Five9.

Job Description

Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide.

Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves.

In this pivotal role as a Senior Network Engineer, you will join a team of experienced network engineers at the forefront of shaping and expanding the worldwide infrastructure of a dynamic and growing company. Your core mandate will involve implementing and operating cutting-edge enterprise network solutions. Guided by our strategic vision, you will assist in deploying key initiatives in Europe and in other parts of the globe.

Main duties and responsibilities

• Planning, documenting, and performing network changes/extensions.

• Orchestration of firewall rules and underlying network settings.

• Designing and documenting the corporate network architecture (LAN/WAN/WLAN/SECURITY).

• Network security experience and awareness.

• Operating and monitoring of the corporate network infrastructure.

• Providing next level network infrastructure related support.

• Designing network aspects of disaster recovery and operational security.

• Maintaining, auditing, and improving corporate network & security standards.

• Performing network related root cause analysis (RCA) and problem resolution.

• Defining, monitoring, and reporting KPIs for network services/devices.

• Managing proof of concepts, feasibility studies and other corporate initiatives.

• Hands-on experience in SDWAN technology, network design, and implementation preferred.

• Acting as project leader for network related activities/projects.

Reporting and collaboration

• The holder of the position reports directly to Senior Networking management.

• The position requires excellent communications skills along inter-department collaboration.

Profile and education

• Relevant network/IT related education (academic degree preferred).

• Must have or be actively working towards certifications such as CCNP, PCNSA, or PCNSE.

• Excellent understanding of corporate network & data center application architecture concepts.

• Excellent analytic skills.

• Excellent understanding of these technical areas below:

• Security & firewall infrastructure (Palo Alto, Multivendor) - mandatory

• Network infrastructure (Cisco, Arista) - mandatory

• Cloud platforms (AWS, Azure, Google Cloud)

• Wireless network infrastructure (Aruba HPE wireless cloud central)

• VPN technologies/infrastructure

• Network design/management

• Network automation

• Network technologies (Layer1-Layer4)

• Good communication & technical writing skills.

• Good team player.

• Independent, goal-oriented, and self-motivating personality.

• Passion to deliver high quality standard levels.

• Accuracy and high-risk awareness.

• Excellent English language skills (oral & written).

• Willingness to travel and to perform standby on-calls.

Specific skills and knowledge

• Min 5 years of professional experience in senior network engineering roles.

• SolarWinds configuration and management.

• Practical experience in enterprise network & security Plan/Build/Run setup.

• Hands-on experience with Palo Alto firewalls, Arista switches, and Aruba wireless solutions.

• Work experience within an international/multicultural environment preferred.

• Ability to work with teams distributed in different time zones.

Benefits:

• Five9 Shares

• Bonus Scheme

• 10% Flex Benefit

• Meal Allowance

• Medical Insurance

• Life Insurance

• 25 day Annual Leave + Public Holidays

Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills.  The more inclusive we are, the better we are.  Five9 is an equal opportunity employer.

View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal.

Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.

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