Working Stack

Inventory

The tech stack, layer by layer.

Working Stack

My stack layer by layer. Now is what I build and operate with today. Operated is what I have run, migrated or decommissioned across 24 years of IT operations — not in daily use, but I have carried a pager for it.

Workstation & editor

Now

·MacBook Pro 14" M3 Pro
·Dell U2723QE — 27" 4K external
·Logitech MX Master 3S
·Keychron K2 (Brown switches)
·Cursor (primary, Sonnet / Opus)
·Claude Code
·Codex CLI
·tmux + zsh + Starship
·Warp terminal

Languages

Now

·TypeScript
·Python
·Bash / PowerShell
·SQL
·DAX

Web & application

Now

·Next.js (App Router)
·React
·Tailwind v4
·shadcn/ui
·NestJS
·FastAPI

Compute & virtualization

Now

·Docker + Docker Compose
·Docker on cloud VPS / cloud-hosted container stacks
·Docker Hub (published images)
·Kubernetes

Operated

·VMware vSphere / ESXi + vCenter
·VMware Horizon (VDI)
·Hyper-V
·Proxmox
·Citrix XenServer
·Windows Server (2003 → 2022) + Server Core
·Failover clustering
·P2V migrations
·RHEL / CentOS / Ubuntu (RHCE)

Cloud & hosting

Now

·AWS
·Azure
·GCP
·Vercel
·Hostinger VPS
·API hosting — FastAPI / NestJS behind Nginx or Caddy

Operated

·Rackspace
·DigitalOcean
·Linode
·GoDaddy · Bluehost
·cPanel / WHM · Plesk
·Dedicated & colocated servers

Data

Now

·Postgres
·MySQL / MariaDB
·MS SQL Server
·Supabase
·Redis

Storage & backup

Now

·Veeam Backup & Replication
·rsync

Operated

·SAN — Fibre Channel + iSCSI
·NAS — Synology / QNAP
·Dell EMC arrays
·NFS / SMB shares, quotas + permissions
·RAID arrays
·Deduplication · storage tiering
·Acronis · Commvault · Bacula
·Azure Site Recovery
·Restore testing + DR drills

Networking & CDN

Now

·Cloudflare
·CloudFront
·Nginx
·Caddy
·Route 53
·Vercel Edge

Operated

·Cisco IOS
·Cisco Catalyst switching
·Routing & switching
·VLAN segmentation
·Load balancers — F5 / HAProxy
·Leased lines & ISP redundancy
·DNS + DHCP
·Wireshark packet analysis
·Structured cabling & fibre

Perimeter & security

Now

·Fortinet · SonicWall · Palo Alto · pfSense
·Site-to-site VPN

Operated

·Cisco ASA
·Check Point
·Sophos · WatchGuard · Untangle
·Web application firewall
·SIEM — Splunk / Wazuh / Sentinel
·Nessus / OpenVAS vulnerability scanning
·Snort IPS
·Endpoint protection — Symantec / Sophos / CrowdStrike
·DLP
·Squid proxy + content filtering

Identity

Now

·Active Directory / ADFS
·Azure AD / Entra — SSO + Conditional Access
·MFA

Operated

·Active Directory (multi-site forests)
·Group Policy
·BitLocker

Email & messaging

Now

·Microsoft 365 / Exchange Online
·SPF / DKIM / DMARC
·Postfix + SpamAssassin
·EOP / Defender for Office 365
·Mailgun

Operated

·Exchange Server on-prem + hybrid migration
·SharePoint

Voice platforms

Now

·FreeSWITCH
·Asterisk
·FreePBX
·OpenSIPS
·Twilio

Operated

·Elastix / Vicidial
·Avaya
·Cisco CallManager
·3CX
·Softphones & IP handsets

Telephony & carrier

Now

·SIP trunks

Operated

·E1 / PRI lines
·Analog FXO / FXS gateways
·Dialogic cards
·Sangoma / Digium cards
·Carrier & termination vendor management
·Toll-free & DID management
·G.729 & codec tuning
·WebRTC

Contact centre

Now

·Dialer campaign operations
·DNC / opt-out suppression

Operated

·IVR & call routing
·Predictive & progressive dialing
·Call recording

Self-hosted AI

Now

·Ollama — Llama / Qwen / Mistral
·vLLM
·LM Studio
·LiteLLM (model gateway / proxy)
·whisper.cpp (ASR)
·Tesseract OCR (eng + hin)

Model access

Now

·Claude Sonnet / Opus
·GPT-4 / o-series
·OpenRouter
·Groq
·Together
·Hugging Face
·Perplexity

Agents & orchestration

Now

·MCP servers
·LangChain
·LlamaIndex
·CrewAI
·AutoGen
·n8n
·Flowise
·Dify

Vector & retrieval

Now

·pgvector
·Qdrant
·Weaviate
·Chroma
·Pinecone

Speech & media

Now

·Whisper API
·Deepgram
·ElevenLabs
·Stable Diffusion / ComfyUI

DevOps & CI/CD

Now

·Terraform
·Ansible
·GitHub Actions
·CI/CD
·Bash scripting

Observability

Now

·Prometheus / Grafana

Operated

·Nagios · Zabbix · Icinga
·PRTG · Cacti
·SolarWinds
·Datadog · New Relic
·Sentry
·ELK / Loki
·Uptime Kuma
·PagerDuty

ITSM & service desk

Operated

·Freshservice
·Zendesk
·osTicket
·ManageEngine
·Spiceworks

BI & ERP

Now

·Power BI
·Dynamics NAV / Business Central
·Dynamics CRM
·Odoo
·Zoho One

Outbound & GTM

Now

·Apollo
·Clay
·Smartlead
·Instantly
·HubSpot

Data centre facilities

Operated

·Server room build-out
·UPS + power redundancy
·Precision cooling
·Biometric access control

Governance

Now

·ISO 27001 controls

Operated

·ISO 27001 implementation + surveillance audits
·CMMI Level 3 appraisal
·Asset & licence management
·Vendor & AMC management

Productivity

Now

·Notion
·Linear
·Cal.com
·1Password
·Raycast