Download CV

Open to platform, infrastructure & DevOps roles

L2 Support Engineer Team Lead, Linux, ITILGabriel Dinu

Twelve years building and supporting retail systems at scale — from L1 helpdesk to leading the L2 team behind Delhaize Romania's POS, self-checkout, and backend infrastructure. ITIL certified, Linux-focused, and increasingly drawn to the automation side: infrastructure that can be torn down and rebuilt from a git repository.

Email meSee my projects
Years in production support
12+
On-call for retail estates
24/7
Homelab declared in git
100%

Tools I work with every day

Projects

Things I've built

And what I learned building them.

GitOps

Self-Hosted Kubernetes Homelab

A bare-metal k3s cluster managed entirely through GitOps. This page is served from it.

Every workload is declared in git and reconciled by Argo CD using the App-of-Apps pattern, so manual changes self-heal back to the committed state. TLS certificates are issued automatically by cert-manager through Let's Encrypt DNS-01 challenges, requiring no inbound port for validation. Credentials are encrypted with Sealed Secrets so they live safely in version control. Debugging spans the full stack — I traced a broken public HTTPS path from ISP CGNAT checks through router NAT rules down to a duplicate containerPort conflict in a Traefik Helm override.

  • k3s
  • Argo CD
  • Traefik
  • cert-manager
  • Sealed Secrets
  • Prometheus
  • Cloudflare
View repository
Automation

Retail Rollout Automation

Scripted deployment and rollback procedures for POS and self-checkout estates.

Built and maintained custom scripts for rolling out software across a national retail footprint, with tested rollback paths to prevent prolonged downtime during production changes. Reduced manual effort and made deployments repeatable across sites.

  • Bash
  • Linux
  • Windows Server
  • POS
  • SCO
More on LinkedIn
AI / Local

Self-Hosted LLM Inference

Ollama running on Proxmox, integrated with a Hermes Agent for automated workflows.

Runs in a Proxmox VM using Ollama to provide local inference with Gemma 4 and Qwen 3 through its HTTP API, keeping data entirely within the local environment. A Hermes Agent adds automation and system interaction capabilities. The setup is also integrated with VS Code as a free, open-source coding assistant, and can hand more complex tasks to third-party AI services when needed.

  • Proxmox
  • Ollama
  • OpenClaw
  • Hermes Agent
  • Linux
More on GitHub

Experience

Twelve years in production

From L1 helpdesk to leading the L2 team. Newest first.

  1. L2 Software Support Engineer, Team Lead

    Romanian Business Consult

    Dec 2019 – present
    • Lead the team implementing and supporting retail solutions for Delhaize Romania
    • Own root cause analysis and all customer-facing communication for assigned accounts
    • Manage deployments of self-checkout (SCO), POS, backend monitoring, and peripherals
    • Write and maintain rollout/rollback scripts, minimising downtime during production changes
    • Review and validate FSDs, Change Requests, and BRDs through Jira
    • Provide 24/7 on-call emergency support while maintaining client SLAs
    • Liaise with vendors including Diebold Nixdorf and NCR to resolve escalations

  2. System Support Engineer, Level 2

    Romanian Business Consult

    May 2015 – Dec 2019
    • Implemented software solutions across varied retail environments
    • Advised clients on rollout strategy to meet objectives without affecting production
    • Escalated L3 issues to vendors; authored documentation for the L1 helpdesk
    • Delivered end-user training on application usage

  3. IT Technical Support, Level 1

    Romanian Business Consult

    May 2014 – May 2015
    • Diagnosed and resolved hardware and software faults
    • Owned issues end-to-end while managing customer expectations

  4. Back Office Administrator

    BCR

    Mar 2013 – May 2014
    • Processed corporate and retail account requests through dedicated banking applications
    • Verified authorised representative rights against submitted legal documentation
    • Oversaw and tested the rollout of a new internal software application

Skills

My toolbox

Tools and practices I work with day to day.

Kubernetes & GitOps

  • k3s
  • Argo CD
  • Helm
  • App-of-Apps
  • kubectl

Automation & Scripting

  • Bash
  • Python
  • cloud-init
  • Git
  • Rollback design

Systems

  • Linux
  • Windows Server
  • Docker
  • systemd
  • WSUS

Networking & Security

  • Traefik
  • cert-manager
  • TLS
  • DNS
  • Cloudflare
  • iptables

Retail Systems

  • POS
  • Self-Checkout
  • Diebold Nixdorf
  • NCR
  • Fiscal homologation

Service Management

  • ITIL
  • Jira
  • MS CRM
  • ServiceNow
  • SAP
  • SQL Server

Education

BSc International Economic Relations

Dimitrie Cantemir University, 2009 – 2012

Certifications

ITIL Foundation

Complete Python Bootcamp: Zero to Hero

Languages

Romanian (native)

English

Available for new roles

Let's talk

Open to new opportunities and conversations, particularly in platform, infrastructure, or DevOps engineering.

Email meDownload CV

[email protected]

Open to workEmail me