Sure — below is a **compressed, structured master list** of the **most common software engineering pitfalls**, kept **under 4,000 characters**, in clear English. Think of this as a **universal bug & failure taxonomy**. --- ## Common Software Engineering Pitfalls (Master List) ### 1) Requirements & Product * Vague or unmeasurable requirements * Missing edge cases (empty, max, null, concurrency) * Scope creep without control * Wrong prioritization of features * No clear “definition of done” * UX flows not aligned with real user behavior ### 2) Architecture & Design * God objects / spaghetti code * Poor module boundaries * Overengineering or premature abstraction * Tight coupling between components * Single points of failure * No backward compatibility strategy * Synchronous chains instead of async workflows ### 3) Core Logic & Code * Off-by-one errors * Incorrect assumptions (“this will never be null”) * Type conversion and precision issues * State inconsistency * Magic numbers / strings * Incorrect equality or ordering logic ### 4) Algorithms & Data Structures * Inefficient Big-O choices * Wrong data structure (list vs map/set) * Excessive copying of large objects * Overflow / underflow * Rounding errors (especially money) ### 5) Database & ORM * **N+1 queries** * Missing or wrong indexes * SELECT * overfetching * Missing transactions * Wrong isolation level * Deadlocks and lock contention * Pagination with OFFSET on large tables * Broken migrations * Soft-delete filtering mistakes * Timezone errors ### 6) Caching & Consistency * Stale cache * Cache invalidation errors * Cache stampede * Hot keys * Wrong TTLs * Cache/DB inconsistency ### 7) Concurrency * Race conditions * Lost updates * Double submits * Non-atomic operations * Deadlocks, livelocks, starvation ### 8) Distributed Systems * No timeouts * Retry storms * Missing idempotency * Event duplication or reordering * Clock skew * Broken distributed locks * No compensation (Saga failures) ### 9) APIs & Integrations * Incorrect HTTP status codes * Inconsistent error formats * Missing validation * Breaking changes without versioning * No rate limiting * Webhooks without signature verification ### 10) Security * SQL / NoSQL injection * XSS * CSRF * IDOR (authorization bypass) * SSRF * Weak password handling * Secrets in code or logs * Overly permissive CORS * Missing rate limits ### 11) Frontend / Mobile * UI state desynchronization * Multiple submits * Infinite render loops * Memory leaks * Poor performance on large lists * Missing offline/error UX * Localization & RTL issues * Accessibility gaps ### 12) Networking * Incorrect timeout values * Connection leaks * Bad retry strategies (no backoff) * Proxy / load balancer header issues ### 13) Performance * No profiling * Blocking I/O * Oversized payloads * Memory bloat * Thundering herd problems ### 14) Testing * Only unit tests, no integration * Flaky tests * Shared test state * Excessive mocking * No E2E coverage ### 15) DevOps & Release * Environment drift * Secrets mismanagement * No rollback strategy * Bad migration ordering * Missing observability * Alert fatigue ### 16) Logging & Monitoring * Swallowed exceptions * Logging sensitive data * Missing correlation IDs * No metrics or tracing ### 17) Data Privacy & Compliance * Excessive data collection * No retention policy * No audit logs * Unencrypted data at rest or transit ### 18) Payments & Billing * Missing idempotency * Unverified payment webhooks * Entitlement cache errors * Incorrect proration/refunds --- If you want, I can turn this into: * a **one-page engineering checklist**, * a **pre-production audit template**, or * a **stack-specific version** (backend, mobile, SaaS, fintech, AI apps). Just say the word 👌
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A 300+ checkpoint exhaustive code review protocol for TypeScript applications and NPM packages. Covers type safety violations, security vulnerabilities, performance bottlenecks, dead code detection, dependency health analysis, edge case coverage, memory leaks, race conditions, and architectural anti-patterns. Zero-tolerance approach to production bugs.
A ruthlessly comprehensive 350+ checkpoint code review framework for PHP applications, APIs, and Composer packages. Examines type declarations, hunts SQL injection and XSS vulnerabilities, detects memory leaks, identifies race conditions, audits all Composer dependencies for CVEs and abandonment, finds dead code and duplications, validates error handling, checks authentication/authorization patterns, analyzes database query performance, and stress-tests 60+ edge cases.
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