Implementing Retry Logic with Exponential Backoff
Build robust retry logic for calls to an external payment API that occasionally returns 429 or 503, using exponential backoff with jitter.
Jan 20, 2025
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Scenario
10 articles
Writing Thread-Safe Python Code
Fix race conditions and corrupted data in a multithreaded Python service by using locks, thread-safe collections, and TTL caches.
Jan 20, 2025
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Python Service Crashing with OOM in Kubernetes
Diagnose and fix a Python service being OOM-killed in Kubernetes by profiling memory growth and switching to streaming JSON parsing.
Jan 20, 2025
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Optimising a Slow Data Processing Pipeline
Reduce a 10-million-row CSV batch job from 4 hours to under 30 minutes using chunked bulk inserts and multiprocessing.
Jan 20, 2025
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Debugging a Circular Import Error
Diagnose and fix a Python ImportError caused by circular imports between modules, using module restructuring, lazy imports, and …
Jan 20, 2025
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Designing a Rate Limiter in Python
Implement a sliding-window rate limiter with Redis and FastAPI middleware that enforces 100 requests per minute per API key.
Jan 20, 2025
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CPU-Bound Task Blocking the Async Event Loop
Fix a FastAPI service that becomes unresponsive during image thumbnail generation by offloading CPU-bound work to a process pool or task …
Jan 20, 2025
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Race Condition in an Async Python Service
Prevent duplicate username registrations in a FastAPI service caused by a check-then-insert race condition, using database constraints and …
Jan 20, 2025
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Slow API Endpoint: N+1 Query Problem
Fix a Django REST endpoint responding in 8 seconds for 500 users by eliminating N+1 queries with annotate() and prefetch_related().
Jan 20, 2025
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Memory Leak in a Long-Running Python Service
Diagnose and fix unbounded memory growth in a Python microservice using tracemalloc, replacing an unbounded module-level set with Redis TTL …
Jan 20, 2025
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