Deep dives on projects I have built: architecture decisions, what I learned, and what I would do differently.https://abdellah-shafi.dev/en-ushttps://abdellah-shafi.dev/blog/building-birr-ai-nbe-navigator/https://abdellah-shafi.dev/blog/building-birr-ai-nbe-navigator/How I shaped Birr AI around source-grounded regulatory answers, a real document index, and a constrained RAG orchestrator instead of a loose chatbot.Tue, 23 Jun 2026 00:00:00 GMTDjangoReactAI/RAGpgvectorhttps://abdellah-shafi.dev/blog/birr-ai-streaming-sse-architecture/https://abdellah-shafi.dev/blog/birr-ai-streaming-sse-architecture/How Birr AI streams RAG answers with async Django, Server-Sent Events, persisted messages, and source payloads without adding WebSockets or a separate realtime service.Tue, 23 Jun 2026 00:00:00 GMTDjangoSSEAI/RAGasynchttps://abdellah-shafi.dev/blog/birr-ai-nightly-ingestion-pipeline/https://abdellah-shafi.dev/blog/birr-ai-nightly-ingestion-pipeline/How the Birr AI ingestion job discovers NBE files, extracts Markdown, embeds chunks into pgvector, handles quotas, and stays resumable with ordinary Django models.Tue, 23 Jun 2026 00:00:00 GMTPythonDjangopgvectorETLhttps://abdellah-shafi.dev/blog/evalboard-byok-llm-evaluation-dashboard/https://abdellah-shafi.dev/blog/evalboard-byok-llm-evaluation-dashboard/How EvalBoard models datasets, prompt templates, runs, and per-row results so LLM behavior can be measured instead of judged from one good demo.Tue, 23 Jun 2026 00:00:00 GMTDjangoReactLLMDRFhttps://abdellah-shafi.dev/blog/evalboard-byok-provider-architecture/https://abdellah-shafi.dev/blog/evalboard-byok-provider-architecture/How EvalBoard supports OpenAI-compatible LLM providers, sends user API keys per request, and keeps provider integration small while accepting the tradeoffs of browser-held keys.Wed, 24 Jun 2026 00:00:00 GMTDjangoBYOKLLMAPI Designhttps://abdellah-shafi.dev/blog/evalboard-django-orm-analytics-dashboard/https://abdellah-shafi.dev/blog/evalboard-django-orm-analytics-dashboard/How EvalBoard uses aggregate queries, conditional counts, cached stats, and Recharts to summarize LLM evaluation history from one DRF endpoint.Wed, 24 Jun 2026 00:00:00 GMTDjangoORMRechartsAnalyticshttps://abdellah-shafi.dev/blog/ecommerce-api-payments-stock-ci/https://abdellah-shafi.dev/blog/ecommerce-api-payments-stock-ci/How the e-commerce API turns carts into orders with price snapshots, row locks, atomic transactions, F expressions, and stock validation that prevents overselling.Tue, 23 Jun 2026 00:00:00 GMTDjangoPostgreSQLDRFTransactionshttps://abdellah-shafi.dev/blog/ecommerce-api-chapa-webhooks/https://abdellah-shafi.dev/blog/ecommerce-api-chapa-webhooks/How the e-commerce API initializes Chapa payments, stores pending transactions, verifies webhooks, and atomically updates payment and order state.Wed, 24 Jun 2026 00:00:00 GMTDjangoPaymentsChapaWebhookshttps://abdellah-shafi.dev/blog/ecommerce-api-tests-docs-ci/https://abdellah-shafi.dev/blog/ecommerce-api-tests-docs-ci/How the e-commerce API uses pytest-django, DRF test clients, OpenAPI docs, Docker, and CI to protect the registration, checkout, and payment paths.Wed, 24 Jun 2026 00:00:00 GMTDjangopytestOpenAPICI/CDhttps://abdellah-shafi.dev/blog/virtual-blood-bank-django-api/https://abdellah-shafi.dev/blog/virtual-blood-bank-django-api/How the Virtual Blood Bank API models facilities, blood units, inter-facility requests, and request history for a healthcare workflow where state changes matter.Tue, 23 Jun 2026 00:00:00 GMTDjangoREST APIPostgreSQLHealthcarehttps://abdellah-shafi.dev/blog/virtual-blood-bank-rbac-lifecycle/https://abdellah-shafi.dev/blog/virtual-blood-bank-rbac-lifecycle/How VBB separates clinicians, supply staff, and admins, then routes every blood request action through an authorizer and lifecycle service.Wed, 24 Jun 2026 00:00:00 GMTDjangoRBACState MachinesDRFhttps://abdellah-shafi.dev/blog/virtual-blood-bank-inventory-dashboard-notifications/https://abdellah-shafi.dev/blog/virtual-blood-bank-inventory-dashboard-notifications/How VBB turns facility inventory into dashboard summaries, low-stock alerts, expiring-soon flags, notification events, and audit records without overbuilding infrastructure.Wed, 24 Jun 2026 00:00:00 GMTDjangoORMNotificationsHealthcare