Engineering Guides
Original technical playbooks for file validation, media pipelines, parser reliability, and secure upload architecture.
File Upload Validation Architecture
Design a layered upload validation flow that blocks malicious inputs without hurting UX.
MIME Sniffing vs Extension Checks
Prevent spoofed uploads by combining extension allowlists with content-based MIME detection.
Secure Upload Pipeline in Flask
Reference architecture for building safe file-ingest paths in Flask services.
Media Transcoding Test Strategy
Create deterministic test plans for audio/video transcoding and playback pipelines.
Document Parser Regression Suite
Build parser regressions that catch extraction and conversion failures before release.
Archive Extraction Safety
Prevent zip-slip, zip bombs, and parser abuse in archive handling pipelines.
Image Optimization Test Plan
Validate image conversion pipelines for quality, compatibility, and performance.
Playback Compatibility Matrix for Web Media
Build a compatibility matrix that avoids playback surprises across browsers and devices.
Checksum Integrity Workflows
Use SHA256 manifests to guarantee fixture integrity in CI and production pipelines.
Large File Performance Benchmarking
Benchmark file ingest and processing performance with reproducible workloads.
API Error Taxonomy for File Pipelines
Define stable, actionable error classes for upload and processing APIs.
Fixture Versioning Strategy for QA Assets
Control sample-file changes with versioned fixture sets and compatibility contracts.
Streaming Upload Resilience Patterns
Design resilient streaming upload flows under unstable network conditions.
Conversion Output Verification Playbook
Verify converted outputs for correctness, quality, and contract compliance.
Case Study: MIME Mismatch Blocking Legitimate Uploads
A production-style incident where strict type checks rejected real user files and how policy was corrected.
Case Study: Archive Path Traversal Near Miss
How an archive extraction path bug was discovered during QA and neutralized before wider impact.
Case Study: Video Transcode Latency Spike
A pipeline latency incident caused by profile mismatch and queue saturation, with mitigation strategy.
Case Study: CSV Parser Failure on Malformed Quotes
A parser reliability incident that exposed brittle assumptions in CSV ingestion and schema validation.