# Infrastructure > Selected Engineer ApS work demonstrating Infrastructure — the achievements that prove it. - [Designed a comprehensive infrastructure framework for DTU impacting 14 departments, featuring flexible modules, unified data pipelines, and structured support strategies for long‑term adoption.](https://engineer.company/portfolio/designed-a-comprehensive-infrastructure-framework-for-dtu-impacting-3/) - [Developed and launched the company's first observability dashboard, providing real‑time system performance insights and data visualization on the large office TV.](https://engineer.company/portfolio/developed-and-launched-the-company-s-first-observability-9/) - [Designed, deployed, and maintained 10 PostgreSQL and MS SQL servers on Ubuntu Linux VPS, ensuring optimal server performance and reliability.](https://engineer.company/portfolio/designed-deployed-and-maintained-10-postgresql-and-ms-13/) - [Enhanced data security by implementing 1,000 RBAC rules for developers, application instances, PostgreSQL, MS SQL, and other Linux servers, preventing unauthorized access; documented with Ansible automation.](https://engineer.company/portfolio/enhanced-data-security-by-implementing-1-000-rbac-14/) - [Automated 100 critical data backups using Barman, Google Cloud, Bash, and Python, ensuring data integrity across databases.](https://engineer.company/portfolio/automated-100-critical-data-backups-using-barman-google-18/) - [Deployed and maintained 20 Docker containerized applications, troubleshooting with Podman and Kubernetes, and managing R‑based apps on Google Cloud and AWS.](https://engineer.company/portfolio/deployed-and-maintained-20-docker-containerized-applications-troubleshooting-19/) - [Managed 30 Ubuntu Linux VPS instances, implementing disaster recovery strategies and ensuring optimal network configurations.](https://engineer.company/portfolio/managed-30-ubuntu-linux-vps-instances-implementing-disaster-20/) - [Prevented security breaches by leading access management initiatives, utilizing M365, 1Password, Red Hat SSO, and OKTA SSO.](https://engineer.company/portfolio/prevented-security-breaches-by-leading-access-management-initiatives-21/) - [Mitigated operational risks by implementing a monitoring dashboard using Grafana and Prometheus, improving system reliability.](https://engineer.company/portfolio/mitigated-operational-risks-by-implementing-a-monitoring-dashboard-22/) - [Managed and troubleshooted 8 WireGuard VPN and IPSEC VPN connections, ensuring secure communication across Google Cloud and Linux systems.](https://engineer.company/portfolio/managed-and-troubleshooted-8-wireguard-vpn-and-ipsec-23/) - [Overhauled internal processes, saving 8,000 hours by improving software architecture, systems, and scheduling efficiency.](https://engineer.company/portfolio/overhauled-internal-processes-saving-8-000-hours-by-38/) - [Administered network infrastructure for over 1,000 servers, ensuring optimal system deployment, security, and troubleshooting.](https://engineer.company/portfolio/administered-network-infrastructure-for-over-1-000-servers-39/) - [Automated SSL/TLS certificate creation for 100 Docker applications, ensuring secure connections across Ubuntu Linux hosts.](https://engineer.company/portfolio/automated-ssl-tls-certificate-creation-for-100-docker-41/) - [Configured and deployed 1,000 Wi‑Fi routers, improving network accessibility and performance for clients.](https://engineer.company/portfolio/configured-and-deployed-1-000-wi-fi-routers-48/) - [Administered 100 Bare Bone servers, physical networks, and IP telephony systems, ensuring robust infrastructure for company growth.](https://engineer.company/portfolio/administered-100-bare-bone-servers-physical-networks-and-50/) - [Administered 40 websites on Ubuntu Linux hosting servers with Apache and Nginx, ensuring high availability and performance.](https://engineer.company/portfolio/administered-40-websites-on-ubuntu-linux-hosting-servers-53/) - [Architected, developed, implemented, supported infrastructure, data processing, and the map application for 2 years non‑stop without any weekends, holidays, or vacations, 10–14 hours a day.](https://engineer.company/portfolio/architected-developed-implemented-supported-infrastructure-data-processing-and-55/) - [Optimized budget costs 10 times with zero loss in productivity for the Saudi Arabia company by reimagining the overall infrastructure, eliminating unnecessary services, and relocating from the AWS cloud.](https://engineer.company/portfolio/optimized-budget-costs-10-times-with-zero-loss-56/) - [Provisioned Azure infrastructure as code with Bicep — Container Apps, PostgreSQL Flexible Server, Front Door/WAF and networking — across the development, staging and production environments.](https://engineer.company/portfolio/provisioned-azure-infrastructure-as-code-with-bicep-container-68/) - [Owned end‑to‑end deployments of the platform to Azure, managing releases across development, staging and production environments.](https://engineer.company/portfolio/owned-end-to-end-deployments-of-the-platform-71/) - [Configured database backup retention as infrastructure‑as‑code, then audited the recovery position and documented the restore procedure — naming the remaining gaps rather than leaving them to be found during an incident.](https://engineer.company/portfolio/configured-database-backup-retention-as-infrastructure-as-code-72/) - [Provided round‑the‑clock 24/7 infrastructure support for an IPTV/OTT streaming platform, administering ~1,000 servers plus client‑owned systems for global customers in China, the US and Germany.](https://engineer.company/portfolio/provided-round-the-clock-24-7-infrastructure-support-82/) - [Ensured uninterrupted delivery of IPTV streaming signals between suppliers and clients, monitoring and maintaining the streaming network and IP telephony around the clock.](https://engineer.company/portfolio/ensured-uninterrupted-delivery-of-iptv-streaming-signals-between-83/) - [Planned and implemented new infrastructure functionality for internal and external systems, building solutions durable enough to still run years later with minimal change.](https://engineer.company/portfolio/planned-and-implemented-new-infrastructure-functionality-for-internal-85/) - [As one of the first hires, designed and built the entire core infrastructure and supporting processes from scratch for a green‑energy SaaS startup, laying the foundation for rapid growth.](https://engineer.company/portfolio/as-one-of-the-first-hires-designed-and-86/) - [Integrated a company‑wide password‑management system, strengthening security and streamlining access control.](https://engineer.company/portfolio/integrated-a-company-wide-password-management-system-strengthening-90/) - [Built first‑party error monitoring and OpenTelemetry tracing rather than buying them — payload sanitising, spike and regression detection, symbolication and a synthetic heartbeat — behind 11 operator views.](https://engineer.company/portfolio/built-first-party-error-monitoring-and-tracing-98/) - [Built the company's own infrastructure as 19 Ansible playbooks and 34 roles across 12,065 lines of YAML, converging a live host to a declared state with every play idempotent.](https://engineer.company/portfolio/built-the-companys-infrastructure-as-code-108/) - [Ran the whole company on one 512 MB single‑core host — a git forge, a web server serving seven domains, Tor, two alternate‑protocol servers, backups and intrusion banning — by treating 464 MB of usable memory as the binding architectural constraint.](https://engineer.company/portfolio/ran-the-whole-company-on-one-512mb-host-109/) - [Found and closed three SSH brute‑force protections that had never worked: a ban jail watching port 22 while the daemon listened on 1986, a rate limit shadowed by a broader rule above it, and a ban action whose binary never resolved, so no ban had ever applied.](https://engineer.company/portfolio/found-three-ssh-brute-force-protections-that-never-worked-110/) - [Hardened SSH to 24 asserted directives with three‑stage validation — the candidate file, the assembled config, then the daemon's own read‑back — after the read‑back caught the running server silently overriding two of the twenty‑four.](https://engineer.company/portfolio/hardened-ssh-with-three-stage-validation-111/) - [Proved the intrusion‑banning path end to end on every hardening run by banning a reserved test address, reading the resulting kernel rule and unbanning in a guaranteed cleanup block, so a jail that stops working fails a run instead of reporting healthy.](https://engineer.company/portfolio/proved-the-intrusion-banning-path-on-every-converge-112/) - [Verified firewall rules by position rather than presence, reading the numbered rule list and the live packet‑filter chain, because a rule that exists is not a rule any packet reaches.](https://engineer.company/portfolio/verified-firewall-rules-by-position-113/) - [Built encrypted off‑host backups on restic with retention pruning, an integrity check and a monthly automated restore drill, then audited the recovery position and wrote down the gaps rather than leaving them to be found during an incident.](https://engineer.company/portfolio/built-encrypted-backups-with-a-monthly-restore-drill-114/) - [Built dead‑man's‑switch monitoring that pings only while memory and disk are healthy, so a degraded host raises an alert by going silent — and caught six variable names saying "free" where the check correctly measured "available", an order of magnitude apart on a 464 MB box.](https://engineer.company/portfolio/built-dead-mans-switch-monitoring-115/) - [Made check mode tell the truth across the whole platform after finding six probes deciding on a value the host never gave, because Ansible's command module reports success under --check while skipping the command entirely.](https://engineer.company/portfolio/made-ansible-check-mode-tell-the-truth-116/) - [Added a preflight play that runs the same code as the converge against operator‑local secrets in about a second, after a half‑applied production run died on its ninth task with the swap settings already written to the live host.](https://engineer.company/portfolio/added-a-preflight-play-for-secrets-117/) - [Reconciled a 20‑record DNS zone declaratively against the Cloudflare API with separate audit and BIND‑export entry points, and turned the CDN proxy back off on privacy grounds after building it.](https://engineer.company/portfolio/reconciled-a-dns-zone-declaratively-118/) - [Cut systemd sandbox exposure across every unit this platform installs — a dead‑man's‑switch service from 9.6 UNSAFE to 1.5, an internet‑facing git forge from 8.3 EXPOSED to 1.5 — and added a converge‑time parser check after finding a misspelled directive silently ignored in three unit templates.](https://engineer.company/portfolio/cut-systemd-sandbox-exposure-across-every-unit-119/) - [Built seven read‑only reporting roles that render a live host to Markdown — facts, access, git, metrics, traffic, security and provider inventory — under a rule that no number is printed the run did not measure.](https://engineer.company/portfolio/built-seven-read-only-host-reporting-roles-120/) - [Deployed the company's own git forge on Soft Serve, private by default with no web panel and its SSH port bound to loopback behind a jump host, and made the landing page in front of it a build artefact of the main site rather than a hand‑kept copy.](https://engineer.company/portfolio/deployed-the-companys-own-git-forge-121/) - [Deployed a container plane on Podman and Quadlet under systemd rather than Docker, because Docker publishes container ports above the host firewall's own rules — and gave deploys an unprivileged user with one fixed command instead of root.](https://engineer.company/portfolio/deployed-a-container-plane-on-podman-and-quadlet-122/) - [Automated the provisioning of a second server on a second cloud provider, creating the firewall before the machine so it is born behind one, with both providers' firewalls written directly against their REST APIs to avoid a third‑party collection.](https://engineer.company/portfolio/provisioned-a-second-server-from-code-123/) - [Wrote a scope rule into the repository after a restructure carried another company's inventory, firewall allowances and prose into it — and kept the quarantined residue under the secret scanner rather than excluding it.](https://engineer.company/portfolio/wrote-a-scope-rule-after-a-credential-leak-124/) - [Split the four per‑host operational secrets after establishing that two hosts sharing one dead‑man's switch alert less than two switches, not more, and that a shared backup passphrase makes two hosts one repository.](https://engineer.company/portfolio/split-every-operational-secret-per-host-125/) - [Mirrored the entire site as 777 Gemini documents and 777 Gopher documents off the same deployed tree, at zero bytes of change to the HTML.](https://engineer.company/portfolio/mirrored-the-site-to-gemini-and-gopher-137/) - [Rehearsed the forge‑side CI hook and found two defects unreachable by reading the file: a fallback that put an unresolvable argument on the hook's input, and git's own environment variable following the gate into the checkout and turning 19 tests red.](https://engineer.company/portfolio/rehearsed-the-forge-side-ci-hook-151/)