Senior Network and Security Engineer

Posted:
1/6/2026, 4:19:04 AM

Location(s):
Porto District, Portugal ⋅ Porto, Porto District, Portugal

Experience Level(s):
Senior

Field(s):
IT & Security ⋅ Software Engineering

Join us a Senior Network and Security Engineer !

Are you ready to shape the future of capital markets? We are looking for Senior Network and Security Engineer. The position will be based in Porto.

Job Profile

The Network & Security Solutions Engineer is accountable for infrastructure design, delivery, maintenance and support of On-Premises Networks and Cloud AWS Networks, including security environment.

The role is divided into two keys function, first to support the daily operation of Euronext business, contributing to the stability, resilience and quality improvement of the infrastructure, second to work as a Solution architect for Network and Security areas, designing and implementing new projects.

The Network and security Solutions Engineer provides second- and third-line support of all network and Security solutions for Euronext. This includes carrying an important voice on aspects of implementation, testing, performance and operation.

The network & Security Solutions engineer participates in the Network and Security technology design and conceptualization in collaboration with the other teams contributing to the improvement of the IaaS model.  

Key Accountabilities

  • Lead the maintenance of network solutions to enable effective management of business and technical requirements for all corporate and Data Centre networks.
  • Manage third party suppliers for operational effectiveness and to influence design decisions to ensure maximum business benefit is obtained from the network infrastructure.
  • Own the operational vendor relationships.
  • In charge of the provisioning and maintenance to all areas to ensure appropriate Network solutions and controls in the infrastructure environment
  • Manage the maintenance of the infrastructure environment with standardized process and automatized tools.
  • Provision of detailed and Low-Level Design documentation with subsequent liaison with other team members.
  • Network Lab development.
  • Test plan development.
  • Ownership and maintenance of network monitoring platform.
  • Network instrumentation requirements.
  • Provide second line support for all Euronext network infrastructure, excellent troubleshooting skills.
  • Work with front-line support team to:
    • Increase networking skillset in the team.
    • Ensure standard operating procedures are up to date.
    • Validate incidents and requests that are being escalated to the team.

Knowledge, Skills and Experience Required

Essential:

The applicant is expected to have the following skills and experience on appointment:

  • Engineering Degree, understanding of TCP/IP networks.
  • At least 3 to 5 years of experience in similar functions.
  • Juniper knowledge to JNCIP or JNCIE level on EX, MX, QFX and J series platforms. Same level on Cisco such as CCNP or CCIE level.
  • Understanding of Data Centre Infrastructure, such as structured cabling, power distribution, cooling.
  • Application design and development relating to networks.
  • Knowledge of common services, DNS/NTP etc.
  • Use of network probes and monitors.
  • MPLS VPN design and implementation mindset.
  • Understanding of physical transport technologies such as DWDM.
  • Experience of scripting languages such as python.
  • Detailed knowledge of Firewall technology and how to apply them in a service-oriented enterprise environment.
  • Ability to work in a self-sufficient manner seeking guidance when real obstacles occur.
  • Good communication skills and the ability to work with others on both an ad hoc and project team basis, across organizational boundaries.
  • Graduate and/or several years in depth experience of network implementation and operation.
  • Security Oriented mindset.
  • Network trace analysis skills in critical and complex environments.
  • English speaking and writing.
  • Change Management process experience (ITIL).

Working with us means: 

  • A vibrant international and diverse team: Euronext Securities is part of the Euronext Group, where you'll collaborate with 140 local colleagues and a network of 2,200+ talents across Europe, USA and Asia.  

  • A collaborative environment that fosters professional growth with flexible career paths, learning and development opportunities. 

  • An agile, innovative and dynamic company where you can make an impact. 

Apply by submitting a CV in English.

Join Euronext – Shape capital markets for future generations Euronext is the leading European capital market covering the entire capital markets value chain, from listing, trading, clearing, settlement and custody, to solutions for issuers and investors. We operate seven national stock exchanges, handling 25% of European lit equity trading. Our products include equities, FX, ETFs, bonds, derivatives, commodities and indices. Euronext also provides clearing and settlement services through Euronext Clearing and our network of Euronext Securities CSDs. In addition, Euronext runs MTS, one of Europe’s leading electronic fixed income trading markets, and Nord Pool, the European power market. The company has a diverse domestic and international client base. Find out more about us at: Euronext .com

Euronext Values

Unity

•        We respect and value the people we work with

•        We are unified through a common purpose

•        We embrace diversity and strive for inclusion

Integrity

•        We value transparency, communicate honestly and share information openly

•        We act with integrity in everything we do

•        We don’t hide our mistakes, and we learn from them

Agility

•        We act with a sense of urgency and decisiveness

•        We are adaptable, responsive and embrace change

•        We take smart risks

Energy

•        We are positively driven to make a difference and challenge the status quo

•        We focus on and encourage personal leadership

•        We motivate each other with our ambition

Accountability

•           We deliver maximum value to our customers and stakeholders

•           We take ownership and are accountable for the outcome

•           We reward and celebrate performance

We are proud to be an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people, who come from diverse backgrounds with different personal experiences and points of view and we are committed to providing an environment of mutual respect.

Additional Information

This job description is only describing the main activities within a certain role and is not exhaustive. It does not prevent to add more tasks, projects.