6 min read What is an API Marketplace? An API marketplace (like Stripe, Twilio, RapidAPI, or AWS API Gateway) lets external developers discover, […] Read article
6 min read Union-Find Data Structure Union-Find (also called Disjoint Set Union, DSU) tracks which elements belong to the same connected component. Supports Read article
6 min read Feed Architecture Overview A social feed shows users content from people and pages they follow, ranked by predicted engagement. The Read article
6 min read The Monotonic Stack Pattern A monotonic stack maintains elements in strictly increasing or strictly decreasing order. When a new element Read article
5 min read Stack: LIFO and Its Applications A stack (Last In, First Out) is the go-to structure when you need to process Read article
7 min read Core Entities Member: member_id, user_id, program_id, tier (BRONZE, SILVER, GOLD, PLATINUM), points_balance, lifetime_points (never decrements — used for tier calculation), Read article
6 min read The Two Pointers Pattern Two pointers uses two indices that move toward each other (or in the same direction) to Read article
7 min read The Three Pillars of Observability Metrics: numerical measurements over time (request rate, error rate, latency percentiles, CPU usage). Low cardinality, Read article
6 min read Core Entities Customer: customer_id, name, email, phone, default_address, stripe_customer_id. Restaurant: restaurant_id, name, address, location (lat/lng), cuisine_type, rating, is_open, prep_time_minutes, operating_hours. Read article
6 min read The Sliding Window Pattern Sliding window optimizes O(n^2) brute-force approaches on contiguous subarrays/substrings to O(n). The key insight: instead of Read article
6 min read Data Lake vs. Data Warehouse A data warehouse stores structured, schema-on-write data optimized for SQL analytics (Redshift, BigQuery, Snowflake). A Read article
7 min read Why Bit Manipulation Matters in Interviews Bit manipulation problems test your understanding of how integers are represented in binary and Read article
6 min read Core Entities User: user_id, email, name, quota_bytes, used_bytes. Document: document_id, owner_id, name, mime_type, current_version_id, parent_folder_id, is_deleted (soft delete), created_at, updated_at. Read article
6 min read What is a Blockchain Explorer? A blockchain explorer is a read-only interface to blockchain data — like a search engine Read article
6 min read Core Entities Issue: issue_id, project_id, title, description (rich text), type (BUG, FEATURE, TASK, EPIC), status, priority (P0-P3), assignee_id, reporter_id, parent_issue_id Read article
