Viprasol Blog
Expert insights on trading, development, and technology. Learn from our team of fintech professionals.
Featured Articles
Case Study: How We Built a Trading Bot That Achieved 47% Annual Returns
Algorithmic trading now accounts for 65-75% of all US equity trading volume in 2026 Expert strategies, risk management, and algorithmic systems for consistent t.
Building a SaaS MVP in 90 Days
The global SaaS market is valued at $317 billion in 2026, growing at 18% annually From MVP to scale — strategies for building, launching, and growing profitable.
What is an Expert Advisor (EA)? Complete Guide for MT4/MT5 Traders
An Expert Advisor (EA) is an automated trading program that runs on the MetaTrader 4 (MT4) or MetaTrader 5 (MT5) platform.
All Articles (1498)
🚀SaaS & StartupsSaaS Webhook Signatures: HMAC Verification, Replay Attack Prevention, and Delivery Retry
Build production-grade webhook infrastructure for SaaS. Covers HMAC-SHA256 signature generation and verification, timestamp-based replay attack prevention, webhook delivery retry with exponential backoff, dead-letter queue, and TypeScript implementation.
☁️Cloud & DevOpsPostgreSQL Table Inheritance and Polymorphism: Multi-Table Hierarchies, Type Routing, and Partitioning
Use PostgreSQL table inheritance for multi-table polymorphism. Covers single-table vs concrete-table vs class-table inheritance patterns, polymorphic associations, type routing with triggers, range partitioning via inheritance, and Prisma workarounds.
🌐Web DevelopmentReact Virtual Table: Rendering 100k Rows with TanStack Virtual, Dynamic Heights, and Sticky Headers
Build a high-performance virtual table in React for 100,000+ rows using TanStack Virtual. Covers fixed and dynamic row heights, sticky header, horizontal scroll, row selection, column resizing, and integration with TanStack Table for sorting and filtering.
☁️Cloud & DevOpsAWS ECS Autoscaling: Target Tracking, Step Scaling, and Fargate Capacity Providers with Terraform
Configure AWS ECS autoscaling for Fargate workloads. Covers target tracking on CPU and memory, step scaling policies for burst traffic, ECS capacity providers, scale-in protection, cooldown periods, and complete Terraform configuration.
🌐Web DevelopmentNext.js Server Actions Advanced Patterns: Progressive Enhancement, Optimistic Updates, and Error Handling
Advanced Next.js Server Actions patterns for production. Covers progressive enhancement with useFormState, optimistic updates with useOptimistic, structured error returns, revalidation after mutations, file uploads in Server Actions, and rate limiting.
🚀SaaS & StartupsSaaS API Analytics: Usage Tracking, Rate Limit Dashboards, and Per-Endpoint Latency Metrics
Build production API analytics for SaaS. Covers API key usage tracking with PostgreSQL, per-endpoint latency percentiles, rate limit consumption dashboards, time-series rollup tables, TypeScript middleware, and Grafana-compatible metrics.
☁️Cloud & DevOpsPostgreSQL LATERAL Joins: Top-N Per Group, unnest Expansion, and Correlated Subqueries
Master PostgreSQL LATERAL joins for advanced query patterns. Covers LATERAL subquery for top-N per group, LEFT JOIN LATERAL for optional correlated data, unnest with LATERAL for array expansion, LATERAL with functions, and performance comparison with alternatives.
🌐Web DevelopmentReact Multi-Step Form Stepper: Per-Step Validation, Progress Persistence, and Back/Forward Navigation
Build a production multi-step form in React. Covers step state management with useReducer, per-step Zod schema validation, localStorage progress persistence so users can resume, back/forward navigation with step guard, and animated step transitions.
☁️Cloud & DevOpsAWS CloudFront Cache Policies: TTLs, Vary Headers, Origin Request Policies, and Invalidation
Configure AWS CloudFront cache policies for maximum cache efficiency. Covers cache policy vs origin request policy separation, TTL configuration by content type, Vary header handling, cache key normalization, programmatic invalidation, and Terraform setup.
🌐Web DevelopmentNext.js Metadata and SEO: generateMetadata, OpenGraph, JSON-LD, and Dynamic Sitemaps
Implement complete SEO in Next.js App Router. Covers static and dynamic generateMetadata, OpenGraph images with next/og, JSON-LD structured data for articles and organizations, robots.txt configuration, and dynamic sitemap.xml generation.
🚀SaaS & StartupsSaaS Customer Health Score: Usage Signals, Churn Prediction, and At-Risk Dashboards
Build a customer health scoring system for SaaS. Covers weighted usage signal model, daily score calculation in PostgreSQL, churn risk classification, at-risk workspace dashboard, automated alerts for declining health, and TypeScript score computation.
☁️Cloud & DevOpsPostgreSQL Statistics and ANALYZE: pg_stats, Autovacuum Tuning, and Query Planner Hints
Understand and tune PostgreSQL query planner statistics. Covers pg_stats and pg_statistic, ANALYZE frequency, autovacuum tuning for high-write tables, default_statistics_target, extended statistics for correlated columns, and planner configuration parameters.
🌐Web DevelopmentReact Charts with Recharts: Line, Bar, Area, Real-Time Data, and Accessible Visualizations
Build production data visualizations in React with Recharts. Covers responsive line charts with real data, stacked bar charts, area charts with gradients, real-time streaming charts, custom tooltips, and ARIA accessibility for charts.
☁️Cloud & DevOpsAWS RDS Read Replicas: Routing, Connection Pooling, Lag Monitoring, and Failover Patterns
Scale read-heavy PostgreSQL workloads with AWS RDS read replicas. Covers Prisma read/write splitting, PgBouncer per-replica connection pooling, replica lag monitoring, automatic failover with Aurora, and Terraform setup for multi-replica configurations.
🌐Web DevelopmentNext.js Parallel Routes and Intercepting Routes: Modals, Tabs, and Split-View Layouts
Use Next.js parallel routes and intercepting routes for advanced layout patterns. Covers @slot parallel route setup, modal-as-route with intercepting routes, tab navigation within layouts, split-pane dashboards, and soft navigation vs hard navigation behavior.
🚀SaaS & StartupsSaaS Project Templates: Template Library, Deep Copy Clone, Variable Substitution, and Preview
Build a project template system for SaaS. Covers template storage schema, deep copy cloning with PostgreSQL recursive CTE, variable substitution in template content, template preview without creating real records, and template gallery UI.
☁️Cloud & DevOpsPostgreSQL Foreign Data Wrappers: postgres_fdw, Remote Queries, and Multi-Database Joins
Query remote PostgreSQL databases from your local instance using postgres_fdw. Covers foreign server setup, user mappings, IMPORT FOREIGN SCHEMA, cross-database JOIN queries, performance with remote WHERE pushdown, and file_fdw for CSV imports.
🌐Web DevelopmentReact Rich Text Editor: Tiptap Setup, Custom Extensions, Toolbar, Image Upload, and Output Formats
Build a rich text editor in React with Tiptap. Covers StarterKit setup, custom toolbar with formatting controls, image upload extension with S3 presigned URLs, mention extension, markdown and JSON output, and collaborative editing with Yjs.
☁️Cloud & DevOpsAWS Lambda@Edge vs CloudFront Functions: A/B Testing, Auth at Edge, and Geo-Routing
Choose between Lambda@Edge and CloudFront Functions for edge logic. Covers A/B testing with cookie-based variant assignment, JWT authentication at the edge, geo-based routing, request/response manipulation, and Terraform setup.
🌐Web DevelopmentNext.js Cache Revalidation: On-Demand ISR, Cache Tags, Webhook Triggers, and revalidatePath
Master Next.js cache revalidation. Covers revalidatePath and revalidateTag for on-demand ISR, cache tag strategies for granular invalidation, webhook-triggered revalidation from CMS, stale-while-revalidate behavior, and the unstable_cache API.
🚀SaaS & StartupsSaaS Plan Limits: Enforcing Feature Gates, Usage Quotas, and Tier-Based Access in Next.js
Enforce SaaS plan limits and feature gates in Next.js. Covers plan limit configuration, usage quota checks in Server Actions, middleware feature gates, upgrade prompts, and PostgreSQL usage counters with atomic increments.
☁️Cloud & DevOpsPostgreSQL Constraints and Validation: CHECK, EXCLUDE, Deferrable Foreign Keys, and Domain Types
Use PostgreSQL constraints for database-level validation. Covers CHECK constraints with complex expressions, EXCLUDE constraints for non-overlapping ranges, deferrable foreign keys for circular references, domain types for reusable validation, and constraint naming conventions.
🌐Web DevelopmentReact Modal Patterns: Accessible Dialogs, Focus Trap, Nested Modals, and Bottom Sheets
Build accessible modal dialogs in React without a library. Covers focus trap with aria-modal, keyboard navigation (Escape/Tab/Shift-Tab), scroll lock, nested dialog stacking, bottom sheet for mobile, and Radix UI Dialog integration.
☁️Cloud & DevOpsAWS SQS Message Processing: Consumer Workers, Visibility Timeout, DLQ, and Idempotency
Build reliable SQS message processing workers in Node.js. Covers long polling consumer loops, visibility timeout management, dead letter queues after max retries, idempotency keys to prevent duplicate processing, batch deletion, and Terraform setup.
🌐Web DevelopmentNext.js File Uploads: Direct-to-S3 Presigned URLs, Multipart, Progress Tracking, and Virus Scanning
Handle file uploads in Next.js with direct-to-S3 presigned URLs, multipart upload for large files, client-side progress tracking with XMLHttpRequest, server-side validation, and ClamAV virus scanning via Lambda.
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