Computer engineer. Writing code since 2007, all-in on cloud since 2010, today building infrastructure for autonomous agents. Anycast networks, email deliverability, operational infrastructure.https://emresavas.com/https://emresavas.com/2010s-cloud-vs-2026-agents/https://emresavas.com/2010s-cloud-vs-2026-agents/A first-person history of the decade that built modern cloud computing, told through the IaaS panels, hypervisor wars, datacenter automation moves, and open-source revolts that I lived through as a student and operator in Istanbul.Fri, 01 May 2026 00:00:00 GMThttps://emresavas.com/build-apis-instead-of-saas/https://emresavas.com/build-apis-instead-of-saas/Should you build an API or go all-in on a full-fledged SaaS product? Creating either has never been easier. With recent advancements in development tools, cloud infrastructure, and streamlined platforms, building an API or launching a SaaS product is more accessible than ever befMon, 23 Sep 2024 00:00:00 GMThttps://emresavas.com/dmarc-the-missing-piece-in-your-email-security-strategy/https://emresavas.com/dmarc-the-missing-piece-in-your-email-security-strategy/As engineers, we often implement SPF records to define authorized mail servers and deploy DKIM signatures for cryptographic message verification. Many have even adopted BIMI for brand logo authentication. However, without DMARC (Domain-based Message Authentication, Reporting, andTue, 01 Jul 2025 00:00:00 GMThttps://emresavas.com/do-not-expose-your-infrastructure-with-spf-records/https://emresavas.com/do-not-expose-your-infrastructure-with-spf-records/SPF (Sender Policy Framework) is a cornerstone of email authentication, designed to prevent spoofing by specifying authorized mail servers. However, misconfigured SPF records can expose critical details about your infrastructure. This exposure provides attackers with valuable datTue, 18 Feb 2025 00:00:00 GMThttps://emresavas.com/how-bimi-enhances-email-security-and-brand-trust/https://emresavas.com/how-bimi-enhances-email-security-and-brand-trust/Brand Indicators for Message Identification (BIMI) is an email authentication protocol designed to enhance email security while reinforcing brand trust. BIMI allows organizations to display their verified logo alongside authenticated emails, helping recipients distinguish legitimWed, 26 Feb 2025 00:00:00 GMThttps://emresavas.com/per-seat-is-dying/https://emresavas.com/per-seat-is-dying/Fourth in the series. The cloud article was history. The milkshake article was diagnosis. The tool-calling article was the playbook. This one is the bottom line: the per-seat licensing model that built every great SaaS company since 2008 is about to be unbuilt by a customer who does not sit. Christensen on asymmetric motivation and non-consumption explains why the incumbents will not, and cannot, fix this in time.Fri, 22 May 2026 00:00:00 GMThttps://emresavas.com/tool-calling-is-the-new-api-design/https://emresavas.com/tool-calling-is-the-new-api-design/Third in the series. The cloud article was history. The milkshake article was diagnosis. This is the playbook. What actually makes an API agent-friendly in 2026, with the JSON Schema, idempotency, error, pagination, scope, and observability patterns that decide whether autonomous software calls your service or rebuilds you from scratch.Fri, 15 May 2026 00:00:00 GMThttps://emresavas.com/why-dkim-alone-is-not-enough-for-email-security/https://emresavas.com/why-dkim-alone-is-not-enough-for-email-security/DomainKeys Identified Mail (DKIM) is a widely used email authentication method that helps verify the integrity of emails. However, relying on DKIM is not sufficient for comprehensive email security. While DKIM ensures email content remains unaltered during transmission, it does nWed, 26 Feb 2025 00:00:00 GMThttps://emresavas.com/your-api-is-the-product/https://emresavas.com/your-api-is-the-product/Last week I wrote about Christensen's milkshake study and the coming disruption of SaaS by agentic software. This week I want to be specific about the trap. Most people building software today are still in the marketing meeting, picking a color palette for a dashboard the actual buyer will never see, because the actual buyer is not a person anymore. It is software. And the people who say agents are not ready for serious work are the same people who said minimill steel was too brittle for cars in 1985.Fri, 08 May 2026 00:00:00 GMT