
Adopt blue-green or rolling deployments, even in a scrappy setup. Migrations should be backward compatible, using expand-contract patterns rather than risky schema changes. Wrap significant features behind flags, defaulting to off. Maintain a clean rollback procedure documented in a single, reachable note. Test migrations with production-like data sizes to expose slow queries. Deploy small, trackable changes, avoiding large, intertwined releases that increase cognitive load and hide faults that surface only under real user traffic.

Design a single dashboard that helps a solo founder answer: Is the system healthy? Include request rates, error percentages, p95 latency, queue depth, and key business metrics. Tie alerts to user impact rather than noisy internal thresholds. Ensure logs are searchable, tracing includes request identifiers, and snapshots exist for sudden spikes. Practice acknowledging, escalating, and resolving alerts quickly. Avoid alert floods by tuning thresholds, grouping related incidents, and prioritizing human-readable explanations over clever, hard-to-interpret graphs.

Define severity levels, even if it feels formal. Provide a first-response script: acknowledge, stabilize, communicate, investigate, and resolve. Prepare a status page with concise templates for outages or degraded performance. Keep a rollback or feature-flag-off option reachable in seconds. Log a post-incident note with hypotheses, actions, and outcomes. During pressure, prioritize customer safety and data integrity. After resolution, capture learnings and fold small, systemic improvements into the runbook so similar surprises become routine recoveries.
Double-check live API keys, webhook endpoints, and idempotency to prevent duplicate charges. Simulate failures: expired cards, insufficient funds, and currency mismatches. Provide clear receipts with company details and quick links to self-service refunds or cancellation. Enable 3D Secure where applicable and tune risk settings sensibly. Store no card data directly; rely on vetted providers. Add a short, empathetic explanation near checkout about security measures, building trust by making responsible handling visible and understandable, not hidden behind jargon.
Double-check live API keys, webhook endpoints, and idempotency to prevent duplicate charges. Simulate failures: expired cards, insufficient funds, and currency mismatches. Provide clear receipts with company details and quick links to self-service refunds or cancellation. Enable 3D Secure where applicable and tune risk settings sensibly. Store no card data directly; rely on vetted providers. Add a short, empathetic explanation near checkout about security measures, building trust by making responsible handling visible and understandable, not hidden behind jargon.
Double-check live API keys, webhook endpoints, and idempotency to prevent duplicate charges. Simulate failures: expired cards, insufficient funds, and currency mismatches. Provide clear receipts with company details and quick links to self-service refunds or cancellation. Enable 3D Secure where applicable and tune risk settings sensibly. Store no card data directly; rely on vetted providers. Add a short, empathetic explanation near checkout about security measures, building trust by making responsible handling visible and understandable, not hidden behind jargon.
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