Python · Date and Time
Python Time Zones: Convert the Instant Before Choosing Its Calendar Date
Use aware timestamps and an explicit reporting zone so daily reports assign events to the intended local date.
Engineering articles
Ideas built in practice.
Notes on building reliable software — architecture, decisions and lessons from real projects.
CI/CD · Execution Limits
GitHub Actions Timeouts: Bound the Job and Its Riskiest Steps
Set explicit job and step timeouts, choose budgets from healthy runs and treat cancellation as an interruption to handle.
Django · Pagination
Django Pagination: Order Rows and Choose an Invalid-Page Policy
Give paginated archives an explicit order, deliberate invalid-page handling and navigation that preserves active filters.
FastAPI · Application Lifecycle
FastAPI Lifespan: Set Up Shared Resources Before Requests Arrive
Give shared resources an explicit startup and shutdown boundary, then test both ends of the application lifecycle.
Docker · Build Cache
Docker BuildKit Cache Mounts: Reuse pip Downloads When Layers Rebuild
Distinguish layer reuse from a persistent package cache, and keep dependency installation correct when the cache is empty.
Python · File Reliability
Python File Updates: Prepare a Temporary File Before Replacing the Live One
Write a complete temporary file beside the destination, close it, then replace the live path with explicit cleanup.
CI/CD · Token Permissions
GitHub Actions: Give Each Job Only the Token Permissions It Needs
Use explicit workflow and job permissions to keep verification and release capabilities aligned with their tasks.
Django · Query Evaluation
Django QuerySets: Choose exists(), count() or Loaded Rows Deliberately
Match existence checks, counts and row loading to what a response actually needs, then reuse fetched results.
FastAPI · Testing
FastAPI Endpoint Tests: Assert the Contract, Not Just a Green Status
Test response bodies and rejection paths alongside status codes to make API contracts observable.
Docker · Build Security
Docker Build Secrets: Temporary Access Without Shipping Credentials
Use BuildKit secret mounts for private dependency access and review what build commands leave behind.
Python · Process Management
Python Subprocesses: Set Timeouts and Handle Exit Codes Explicitly
Give external commands explicit arguments, bounded waits and distinct handling for failure and timeout.
CI/CD · Build Artifacts
GitHub Actions Artifacts: Make Build-to-Release Handoffs Explicit
Pass named build outputs between jobs with explicit dependencies, clear paths and deliberate retention.
Django · Transactions
Django on_commit: Trigger Side Effects After the Database Commits
Defer task publication and notifications until a transaction succeeds, while keeping delivery guarantees explicit.
FastAPI · Resource Management
FastAPI Yield Dependencies: Keep Resource Cleanup Close to Setup
Use yield and finally to release request resources predictably while keeping transaction decisions explicit.
Docker · Reliability
Docker Health Checks: Test the App, Not Just the Process
Use bounded probes and explicit startup timing to detect an unresponsive application inside a running container.
Python · Observability
Python Logging: Useful Context Without Duplicate Messages
Use named loggers, deliberate context and centralized handlers to make application logs easier to investigate.
CI/CD · GitHub Actions
GitHub Actions Concurrency: Cancel Stale CI Without Interrupting Deployments
Choose concurrency groups that reduce redundant tests while respecting deployment boundaries.
Django · Database Performance
Django N+1 Queries: Choose select_related or prefetch_related
Load related records deliberately to prevent a list endpoint from issuing a query for every row.
FastAPI · API Design
FastAPI Response Models: Keep Internal Fields Out of Your API
Define an explicit output contract to filter internal fields and make API responses predictable.
Docker · Python
Docker Images for Python Web Apps: Five Practical Habits
Build smaller, repeatable Docker images for Django and FastAPI with five habits that simplify deployment.
React · Integration
Keep demo persistence separate from the API contract
Ilmora demonstrates complete management screens while keeping its current browser demo and planned server integration distinct.
Django · Content
One searchable catalog for managed and fallback projects
A shared project representation keeps search useful across database content and source-backed defaults.
Django · Reliability
Persist the enquiry before sending email
A contact form should keep a visitor’s message even when the mail server fails.