SaaS security is where solo founders get ended — not slowed down, ended. One incident isn't a PR hiccup. It's terminal. The Verizon 2024 Data Breach Investigations Report found that 38% of all breaches used compromised credentials, with an average dwell time of 292 days before detection. For a bootstrapped founder, that's a death sentence. This episode covers why building your own auth is architectural negligence in 2026, the real cost math on Clerk vs Auth0 vs Supabase Auth (Clerk hits $1,825/month at 100K MAUs — Supabase costs $188 for the same load), and the AppSec Santa 2026 study finding that 25.1% of AI-generated code contains confirmed exploitable vulnerabilities. Plus the SoupExplorer January 2026 report that found 1 in 9 indie Supabase apps actively leaking their database keys to the public internet — and exactly how that happens. Covers SSRF, broken object-level authorization, SQL injection in AI code, Supabase RLS misconfiguration, indirect prompt injection (including the zero-click EchoLeak CVE-2025-32711 exploit), MCP attack vectors, secrets management with Doppler, WAF padding evasion, and the minimum viable security posture that actually works without a DevOps team.

SaaS backend architecture decisions made in week one are the ones you live with at 1,000 users. In 2026, Claude Code makes it dangerously easy to build something that works for 50 users and quietly breaks everything at 500. This episode names the three architectural sins that create six-month rewrites — the microservices complexity trap, the memory and connection limit wall, and the big bang rewrite fallacy — with the math behind each. Then: real compute pricing compared head-to-head (Railway at $160/month vs Fly.io at $42.79 for identical specs, Vercel's hidden 15-cent egress vs Fly.io's 2-cent egress). Database selection with hard limits: Supabase's $25 fixed cost vs Neon's scale-to-zero branching model vs PlanetScale's non-blocking schema changes vs Turso's sub-10ms global edge reads. Plus the PgBouncer prepared statement trap that crashes Prisma and Drizzle in transaction mode (fix: one URL flag), RLS multi-tenant isolation at the database layer, durable execution for AI workloads with Trigger.dev v4 CRIU freezing vs Inngest's per-step billing, and a $80/month observability stack (Sentry + Axiom + Better Stack) that replaces DataDog without the surprise bill.

Just because you can build anything in a week doesn't mean you should. Most vibe-coded projects die in the "nice-to-have" trap, over-engineering AI solutions for simple problems that users simply will not pay for. The fix is pivoting away from generalist tools and focusing on boring, compliance-heavy, high-friction workflows.

This episode breaks down the exact tooling and architecture required to execute a reliable weekend MVP:

• The IDE Wars: We compare the big three. Use Cursor for high-speed, greenfield UI scaffolding. Use Claude Code for deep reasoning and zero-error complex refactors across massive context windows.
• The Golden Stack: Don't fight the AI. We map out the path of least resistance: Next.js with Shadcn UI, Supabase for rigid SQL structure (which AI loves), and Vercel for deployment.
• Killing Hallucinations: How to implement the Model Context Protocol (MCP) to bridge your AI agent directly to live component registries so it stops guessing fake props and breaking your build.
• Stripe Integration: The exact orchestrator prompts required to set up Stripe without mixing up your product IDs and price IDs.

Break the app to own it. Never hardcode your API keys. Ship the live link by Sunday night.