Senior Security Engineer - Freelance

Stack

Responsibilities

• ▹Design, implement, maintain, and continuously improve cybersecurity solutions protecting government systems and critical infrastructure
• ▹Integrate and securely configure security controls in line with organizational policies, EU regulations, and public sector standards
• ▹Monitor, evaluate, and investigate security controls and events, including SIEM tooling (e.g. Splunk)
• ▹Identify, analyze, and remediate vulnerabilities and incidents, including patching, system hardening, and certificate/cryptographic asset management
• ▹Ensure security and resilience of systems across on-premise, cloud, and hybrid environments, including high-availability infrastructures
• ▹Implement and enforce cybersecurity policies and controls aligned with GRC frameworks
• ▹Develop scripts, tools, and automation for security monitoring, detection, and response
• ▹Produce technical documentation, risk assessments, and audit reports; communicate findings to stakeholders
• ▹Collaborate with internal teams, external providers, and public sector bodies

Requirements

• ▹University degree in Cybersecurity, Computer Science, or related field
• ▹Minimum 10 years of professional experience in cybersecurity, information security, or secure systems engineering
• ▹Proven expertise in security standards and compliance frameworks (ISO 27001, NIS/NIS2, GDPR)
• ▹Strong knowledge of security technologies and identity protocols: SSL/TLS, X.509, SAML, OAuth, OpenID Connect, JWT, AWS KMS, KMIP, PKCS#11, HSMs
• ▹Solid understanding of cryptographic principles: AES, GCM, PBKDF2, HMAC, SHA-2
• ▹Advanced network security and architecture knowledge, next-gen firewalls and WAFs (Fortigate, Imperva), TCP/IP, IPSec, HTTP/HTTPS
• ▹Proficiency in Linux/Unix systems, system hardening, OS security
• ▹Experience with secure SDLC and automation
• ▹Experience securing large-scale, complex environments (data centres, government systems, cloud/hybrid)
• ▹Strong communication skills in English

Nice to have

• ▹Knowledge of French

Soft skills

About the company

Netcompany builds cybersecurity solutions protecting government systems and critical infrastructure, working on large-scale international public-sector projects that impact millions of citizens.