# Rymthos Dev
> Bespoke mobile applications in Android Kotlin and Flutter, full-stack backends, and custom web applications. Engineered from scratch to convert.

Founded by Md. Billal Hossain. Zero bloated templates, zero generic AI-slop, and production-grade security with strict PostgreSQL Row-Level Security.

## Documentation & Machine-Readable Resources

- [Home Page Overview](https://rymthos.dev/index.md): Complete summary of Rymthos Dev positioning, services, transparent flat-rate pricing, guarantees, and contact channels.
- [Services Catalog](https://rymthos.dev/services.md): Full breakdown of all 11 engineering services, starting prices in USD and BDT, tech stacks, deliverables, and available add-ons.
- [Full Context Document](https://rymthos.dev/llms-full.txt): Comprehensive consolidated text documentation for LLMs requiring total site context.

## Core Capabilities & Specializations

- **Native Android Applications (Priority #1)**: Pure Kotlin, Jetpack Compose, Room database, Coroutines, WorkManager, Material 3 (60fps guaranteed, sub-80ms startup, zero background battery waste, Google Play 14-day closed testing setup).
- **Cross-Platform Mobile Apps (Priority #2)**: Flutter & Dart, Riverpod, offline-first SQLite cache, Firebase, turnkey App Store & Google Play submission from a single codebase.
- **Specialized Calculation Engines & Utilities**: Offline mathematical & astronomical calculation engines (e.g. Salah Companion offline prayer & Qibla algorithms with zero analytics tracking).
- **Client-Side High-Speed Web Tools**: High-utility developer tools with instant browser execution and zero data logging (e.g. 100ToolCrate suite of 100+ utilities).
- **Cloud Restaurant & Retail POS**: Turnkey waiter web ordering with automatic ESC/POS thermal printer wireless bridges and 5-min self-setup.
- **Headless E-Commerce**: Next.js, Stripe, bKash, Nagad, courier API integration, sub-second tokenized checkout.
- **Backend & Cloud Architecture**: Supabase PostgreSQL, strict Row-Level Security (RLS), PgBouncer connection pooling, sub-5ms Redis caching.
- **Autonomous AI Systems & Agents**: Low-latency phone receptionists (Twilio, Vapi), private enterprise RAG with verified page citations, multimodal vision OCR, and self-hosted n8n workflows.
- **Security Hardening & Legacy Rescue**: 100% local adversarial red-team audits (Strix CLI), secret leak patching, and zero-downtime migration from legacy WordPress/PHP.

## Pricing Overview

- **Starter Plan**: $179 USD / ৳19,990 BDT (Portfolio / Landing Page, 7-10 days)
- **Business Plan**: $449 USD / ৳49,990 BDT (Company site, CMS, SEO, leads integration, 14-18 days)
- **Scale Plan**: $999 USD / ৳109,990 BDT (Full-Stack Web App, SaaS, or Mobile App, 21-30 days)
- **E-Commerce Engine**: $749 USD / ৳79,990 BDT (Full online store with payment rails & admin panel)

## Contact Information

- **Founder**: Md. Billal Hossain
- **Email**: rymthos.dev@gmail.com
- **Primary WhatsApp (Bangladesh)**: +880 1400 788 738
- **Phone / WhatsApp (Direct Call / Saudi Arabia)**: +966 57 187 6846
- **Website**: https://rymthos.dev