Junior Security Engineer

Noesis is looking for a Junior Security & Infrastructure Engineer to join our technical team (security engineering) to work in one of our offices (Lisbon, Porto, Coimbra, Guarda, Covilhã) with the following profile:Main Tasks and

Responsibilities:
Security & Infrastructure OperationsSupport the operation, administration and troubleshooting of Windows and Linux systems and enterprise infrastructurePerform structured troubleshooting, root-cause analysis and support incident investigation and resolutionSupport security hardening, patching, vulnerability remediation and infrastructure security activitiesExecute technical changes following established procedures, change-management processes and documentation standardsNetwork & Security TechnologiesBasic understanding of networking and network security concepts, including DHCP, TCP/IP, DNS, HTTP/HTTPS and common network security protocolsBasic knowledge or exposure to security technologies such as NDR, Email Security, EDR/XDR, firewalls, WAFs and Load BalancersSupport the implementation, configuration and technical validation of security solutions, working alongside senior engineersSupport basic troubleshooting and analysis of connectivity, security and application-related issues across different infrastructure layersTLS, Cryptography & PKISupport TLS/SSL certificate lifecycle activities, including deployment, renewal, validation and troubleshootingDevelop practical knowledge of PKI, Certificate Authorities, certificate chains and trust relationshipsUnderstand fundamental cryptographic concepts, including public/private keys, CSR and digital certificatesTroubleshoot TLS/certificate-related connectivity and application issuesTechnical Projects & Customer EngagementParticipate in technical projects involving infrastructure and cybersecurity technologies, working alongside senior engineers and project teamsSupport technical meetings, requirements gathering and coordination with customers and internal stakeholdersTrack technical activities, issues, dependencies and deliverables, providing clear status updates and documentationCommunicate technical issues and solutions clearly, progressively taking ownership of technical work packages and customer-facing activitiesTechnical

Skills:
Bachelor's or Master's degree in Computer Engineering or a similar field (preferred)1–3 years of experience in the fieldPractical knowledge of Windows Server environmentsPractical knowledge of Linux systemsGood understanding of fundamental networking conceptsBasic understanding of cybersecurity principlesAbility to perform structured technical troubleshooting and problem analysisBasic scripting or automation knowledge using PowerShell, Bash and/or Python is desirable.
Soft

Skills:
Strong problem-solving and analytical skillsStructured and methodical approach to troubleshootingAbility to communicate with both technical and non-technical stakeholdersCustomer-oriented mindsetAttention to detail, particularly when working with security-sensitive infrastructureProactive attitude and willingness to investigate and learn independentlyLanguages:Fluency in PortugueseEnglish proficiency at B2 level or above.
Hybrid work modelRegime de trabalho híbrido.
All our recruitment and selection processes are based on equal opportunities, valuing the competence and potential of each person and ensuring that no candidate is discriminated on the grounds of gender, ethnicity, sexual orientation, age, religion or physical condition.
- Job advertisement under Law nr ****, of 10th JanuaryJoin us.
Let's innovate together