Tech Stack
Cloud & Identity
- Microsoft Azure
- Entra ID
- Cloudflare
- Terraform
Infra & Security
- Proxmox VE
- Linux
- Docker
- WireGuard
Automation
- GitLab CI
- PowerShell
- Bash
- Python
Code & Data
- TypeScript
- Rust
- C#
- Angular
- React
- SQL Server
- PostgreSQL
Open to interesting projects
Nikolaos Koulouridis ⚡
DevSecOps Engineer with 5+ years across cloud, security and code. I run Azure and Entra ID infrastructure, harden and audit production services, and build the tools that make operations boring, from migration pipelines to full-stack apps.
Certifications
Always learning. Currently: CompTIA Security+.
In progress
CompTIA Security+ · CompTIA
SecurityAZ-104 Azure Administrator · Microsoft
DevOpsAZ-900 Azure Fundamentals · Microsoft
CloudSC-300 Identity and Access Administrator · Microsoft
SecuritySC-900 Security Fundamentals · Microsoft
SecurityTerraform Associate · HashiCorp
DevOps
Earned
- Advanced Angular Development · LearnQuest
- Angular Fundamentals: Building Responsive Web Apps · EDUCBA
- Introduction to Data Analytics · Meta
Work Experience
DevSecOps Engineer
Classter (Vertitech S.A.)
01/2026 - Present
- Run self-hosted security and IT infrastructure company-wide: Vaultwarden, Snipe-IT and WireGuard
- Implement ISO 27001 controls and GDPR compliance, with compliance automation
- Manage Azure (DNS, App Services, CDN, Web Apps) and Entra ID; driving the on-prem SQL Server to Azure SQL migration
- CI/CD in Azure DevOps, automation in PowerShell and Bash, Terraform on the way
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I also run application security audits on production services, own the Mailgun email infrastructure, SSL/TLS renewals and L1 incident response, and lead the Knowledge Base redesign, with 15+ operations wiki entries so far.
Web Developer, Website/Server Administrator
Classter (Vertitech S.A.)
11/2021 - Present
- Maintain, migrate and upgrade WordPress and Moodle sites and their hosting (Plesk, cPanel, Webmin)
- Built custom WordPress plugins, including a Classter API integration with JWT auth
- Portal frontend: the new login page and an integrations page revamp with tabs and fuzzy search
- Standardized SEO and CDN configuration across the whole site portfolio
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Day to day that spans JavaScript, TypeScript, PHP, C# and T-SQL, plus data migrations, integrations and end-user support. Over the years I've mentored 20+ interns and run their onboarding and offboarding.
Website/Server Administrator and Developer
Self-Employed / Freelance
11/2023 - Present
- Look after client websites end to end: weekly updates, caching and CDN tuning, monitoring
- GDPR, cookie compliance and SSL/HTTPS across every site
- Support, training and short how-to videos so clients can run their own content
Angular Web Developer
Nereid
09/2023 - 05/2024
- Built the iOS and Android versions of the platform with Angular and Capacitor
- Refactored the CSS architecture: a smaller stylesheet and better Lighthouse coverage
- New pages and UI components from Figma designs
- Google indexing and CDN setup for faster time-to-first-byte and better search visibility
All Projects
Here are some of my projects that I've completed.
DevOpsFeatured
Homelab
Proxmox VELinuxDockerWireGuardVaultwardenJellyfinBashPython
A Proxmox VE homelab running self-hosted services in LXC containers, behind a TLS reverse proxy, with automated update reports.
DevOpsFeatured
Nebula
ReactNode.jsPythonPostgreSQLSupabaseThree.jsDockerMicrosoft Azure
Your cloud infrastructure as a living graph, across Azure, AWS, GitHub, GitLab and Azure DevOps.
SecurityFeatured
Umbra
RustTauriReactTypeScriptWireGuardOpenVPN
Privacy-first VPN client for Windows: WireGuard and OpenVPN behind a real kill switch, trust-scored servers, leak tests and a DNS blocker.
DevOps
MailKeeper
PythonReactViteCloudflareGitLab CIEntra ID
Email deliverability triage for a fleet of hundreds of sending domains.
DevOps
DB Orchestrator
PythonPowerShellMicrosoft AzureEntra IDSQL ServerGitLab CI
A resumable, observable pipeline that migrates tenant databases from on-prem SQL Server to Azure SQL.
Apps
Grimoire
RustTauriReactTypeScriptSQLiteClaude API
A local-first digital library, knowledge base and AI second brain: books, papers, offline archives and notes, with cited answers from Claude or Ollama.
Apps
Mako
Next.jsReactTypeScriptSupabaseStripeClaude APIVitestVercel
Deterministic tokenomics studio with an AI copilot that never makes up a number.
DevOps
Riftpath
ElectronReactTypeScriptSQLiteLinuxWordPressClaude API
A server studio that records every command and turns that history into tools and an AI assistant.
Web
Primorama
ReactViteD3.jsThree.jsJavaScriptCSSVercelGitLab CI
An interactive playground for the prime numbers: 14 live visualizations, 3D views, sound and minigames, built with React, D3 and three.js.
Web
Pulse
JavaScriptThree.jsCSSVercel
A retro-terminal 3D globe tracking Earth's natural events in real time.
Web
Nereid
AngularCapacitorTypeScriptPrimeNGTailwind CSSCloudflare
Marina and berth booking platform: the future of the yachting experience.