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Deep technical articles on Flutter, FastAPI, NestJS, AWS, Firebase, Android, Python, and system design — written from production experience, not theory. No fluff. No tutorials. Real engineering decisions.
By Ankit Kumar, Founder of Kyvronix Technologies · 20 articles in production
Clean Architecture in Flutter: The Complete Guide with Riverpod
How to structure a production Flutter app with Clean Architecture, feature-driven slices, and Riverpod state management. From BhuMitra's codebase.
Flutter Platform Channels: Calling Native Kotlin APIs from Dart
How MethodChannel works, how to call native Android APIs (CameraX, SmsManager, DevicePolicyManager) from Flutter, and common pitfalls from PhoneGuard's architecture.
Real-Time GPS Marker Animation at 60 FPS in Flutter Maps
How to build smooth GPS tracking UIs using TweenAnimationBuilder and custom LatLngTween — eliminating the "jumping marker" problem on flutter_map.
Building a Production NestJS API with PostgreSQL, Redis, and Docker
Full walkthrough of setting up a NestJS application with TypeORM, Redis caching, Docker Compose, and Nginx reverse proxy — production-ready from day one.
Real-Time Collaborative Features with NestJS WebSockets + Socket.io + Redis
How BhuMitra built real-time collaborative survey rooms: Socket.io namespaces, Redis-backed room state, tenant-isolated caching, and graceful disconnection handling.
FastAPI in Production: Async Architecture, Pydantic, and Performance Tuning
How to build FastAPI backends that actually scale — async request handlers, Pydantic v2 validation, dependency injection, and Uvicorn/Gunicorn configuration for production.
Android Background Services in 2026: Foreground Services, WorkManager, and Battery Optimization
The definitive guide to keeping Android services alive — foreground service types (API 34+), WorkManager constraints, boot receivers, and how PhoneGuard survives aggressive battery killers.
CameraX Silent Photo Capture: Building Stealth Camera Services in Kotlin
How to capture images silently using CameraX in a foreground service — no preview, no shutter sound. The exact approach used in PhoneGuard's IntrusionCameraService.
Deploying a NestJS App on AWS EC2 with Nginx, PM2, and SSL — Zero-Downtime Guide
Complete step-by-step guide for deploying a production Node.js API on AWS EC2 — Nginx reverse proxy, PM2 clustering, Let's Encrypt SSL, and Blue-Green deploy scripts.
Docker Compose for Full-Stack Apps: App + PostgreSQL + Redis in One File
How to orchestrate a multi-container application with Docker Compose — service dependencies, volume mounting, environment secrets, health checks, and deploy to EC2.
Firebase FCM Deep Dive: Background Push Commands in Android (API 34+)
How to reliably deliver silent push commands to Android apps even when terminated — FCM data payloads, FcmCommandHandler, foreground service triggers, and Firestore listener fallback.
Google Play Integrity API: Securing Your Mobile Backend from Day One
Why JWT auth alone isn't enough for mobile APIs, and how to implement nonce-based Google Play Integrity verification to block sideloaded APKs, emulators, and API scrapers.
Building a Web Scraper That Doesn't Get Blocked: Anti-Bot Evasion Techniques
Rotating user-agents, request delays, realistic browser headers, session management, and proxy rotation — the complete toolkit for production-grade Python web scrapers.
GitHub Actions as a Free Cron Server: Automating Video Publishing to 3 Platforms
How ExamLoom Daily Automation uses GitHub Actions scheduled workflows as a zero-cost cron server — FFmpeg video generation, API publishing, secrets management, and idempotent runs.
FFmpeg for Developers: Programmatic Video Generation with Python
From frames to MP4: how to use FFmpeg via subprocess in Python, handle codec settings, add audio overlays, resize for platform-specific resolutions (9:16 Shorts, 4:5 Reels), and troubleshoot encoding errors.
Designing for 100k Concurrent Users: Lessons from BhuMitra's Backend
How to architect a backend for massive concurrency — Redis for session state, Gzip compression, TypeORM query optimization, connection pooling, and horizontal scaling with Docker + PM2.
Information Retrieval at Scale: Searching 155GB of Mathematical Data
How the Full-Stack MIR System retrieves formulae from 8.3M files in 20ms — inverted indexes, TF-IDF scoring, tree-distance pre-filtering, and FastAPI async serving.
Flutter GoRouter vs Navigator 2.0: Which Should You Use in 2026?
A practical comparison with real code — GoRouter's declarative routing, deep linking, auth guards, and nested navigation vs the verbose Navigator 2.0 API. Which wins for production apps?
Facebook Graph API for Developers: Auto-Posting to Pages with Python
Complete guide to Facebook Graph API page management — long-lived token generation, page access tokens, publishing photo + video posts programmatically, and handling rate limits.
How to Launch a Tech Startup as a Solo Founder in India: The Kyvronix Story
From B.Tech student to founder — how Kyvronix was built over 12 months, the technical decisions that shaped its stack, lessons learned from shipping to the Play Store, and what comes next.
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