# Platform Architecture > Selected Engineer ApS work demonstrating Platform Architecture — the achievements that prove it. - [Overhauled internal processes, saving 8,000 hours by improving software architecture, systems, and scheduling efficiency.](https://platform.engineer.company/portfolio/overhauled-internal-processes-saving-8-000-hours-by-38/) - [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://platform.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://platform.engineer.company/portfolio/optimized-budget-costs-10-times-with-zero-loss-56/) - [Designed an organization context‑switching system with client localStorage and server‑side cookie mirroring, letting users act as managed organizations while enforcing least‑privilege authorization.](https://platform.engineer.company/portfolio/designed-an-organization-context-switching-system-with-client-59/) - [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://platform.engineer.company/portfolio/provisioned-azure-infrastructure-as-code-with-bicep-container-68/) - [Hardened the application with nonce‑based CSP, HSTS, SameSite cookies, least‑privilege database roles and server‑side entitlement re‑checks.](https://platform.engineer.company/portfolio/hardened-the-application-with-nonce-based-csp-hsts-77/) - [Planned and implemented new infrastructure functionality for internal and external systems, building solutions durable enough to still run years later with minimal change.](https://platform.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://platform.engineer.company/portfolio/as-one-of-the-first-hires-designed-and-86/) - [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://platform.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://platform.engineer.company/portfolio/ran-the-whole-company-on-one-512mb-host-109/)