RAG Portfolio Assistant
FeaturedAn AI-powered assistant built into my portfolio that answers questions about my work, projects, background, and articles using a retrieval-based knowledge flow.
RAGLLMNuxtPostgreSQLpgvectorOpenAIAI UX
Open to networking
Hello, I'm
Christian Oguine
Software & Security Engineer
CEH CertifiedCertified Ethical Hacker — EC-Council
I'm passionate about building secure, scalable systems, from full-stack applications to AI-powered tools and Zero Trust infrastructure. I love sharing what I learn along the way.
Ask my AI assistant anything you'd like to know about me!
-- Quick questions --
hello@christianoguine:~$
About
A quick look at my background
Software & Security Engineer focused on building and maintaining secure, practical systems, from full-stack applications and Zero Trust infrastructure to RAG pipelines and AI agents.
Education
Applied Computer Science - Major in Cyber Security
Howest University of Applied Sciences
Specialisation: Cyber Security
BSc Statistics
Federal University of Technology Owerri, Nigeria
Statistical analysis
Experience
Devatwork
Full-timeSoftware & Security Engineer · Ghent, Belgium · July 2026 – Present
Security-focused full stack engineering. Building secure and practical web applications, APIs, and AI-powered systems. Conducting security assessments and implementing best practices to ensure robust protection for internal and client projects.
Devatwork
InternshipGhent, Belgium · Feb 2026 – May 2026
Full-stack development, security-focused tasks, secure access, Zero Trust architecture, documentation, and practical security research — converted into a full-time role afterward.
Skills
Backend
Node.jsTypeScriptPostgreSQLREST APIsJWTExpress.js
Frontend
Nuxt 3VueNext.jsReactTailwind CSS
Cybersecurity
CybersecuritySecure SDLCOWASP ASVSThreat ModelingCEH CertifiedPenetration TestingSIEMZero Trust
Infrastructure
LinuxCI/CDDockerVPS DeploymentGitHub Actions
AI & Agents
RAGAI AgentsLLM IntegrationVector DatabasesAI API Design
CMS & Marketing
WordPressPrestaShopSEOGoogle Ads
Projects
Selected projects and systems
A few projects that reflect my interests in secure architecture, full-stack development, AI-powered experiences, and practical infrastructure.
Reusable Secure Auth System
FeaturedA production-deployed authentication and authorization backend built under Secure SDLC principles. Supports hybrid authentication for browser and API clients, role-based access control, and a full security documentation suite.
Node.jsTypeScriptPostgreSQLExpressJWTRBACSecurity
Web Security Scanner
FeaturedAn automated web security scanner that checks HTTP security headers, SSL certificates, DMARC records, and exposed sensitive files. Returns a weighted score and grade from A to F with plain-language findings.
TypeScriptNode.jsExpressPostgreSQLDrizzleSecurityDockerOWASP
Articles
Thoughts, insights, and technical writing
I write about cybersecurity, backend systems, AI, and practical development. These articles reflect how I think, build, and solve real-world problems.
Security
8 min read
How I Built an Automated Web Security Scanner — How It Works and How Your Website Benefits From It
Most websites have security loopholes their owners do not know about. I built a tool that finds them automatically — here is how it works and what it checks.
SecurityTypeScriptNode.jsExpressOWASPDMARCSSL
Security
9 min read
Developers Are the First Line of Defence — What Secure SDLC Actually Means
Security conversations tend to focus on the user. But many of the real problems start much earlier — in the decisions developers make during design, development, and deployment.
SSDLCSecuritySTRIDEOWASPSecure Development
Security
9 min read
Sessions vs JWT — They Are Not Alternatives, They Solve Different Problems
Every developer has seen the debate. Sessions or JWT? The truth is that framing the question that way misses the point entirely.
JWTSessionsAuthSecurityNode.js
Contact
Let's connect
Whether you want to discuss a role, a project, collaboration, or just say hello, feel free to reach out.