Full Stack

Overview I build production-grade mobile and web applications that people actually use. From cross-platform mobile apps in Flutter and React Native to full-stack web platforms in TypeScript, I deliver clean, maintainable code with a focus on performance and user experience. My work on TOFY Go! - an English learning app handling 500K+ concurrent users - demonstrates this at scale. What I Can Do For You Mobile Applications Cross-platform apps with Flutter (Dart) or React Native (TypeScript): one codebase, native performance on iOS and Android Native integrations: Camera, GPS, push notifications, biometrics, speech recognition, and offline storage App lifecycle: From App Store / Play Store submission to ongoing maintenance and feature updates Real-world example: TOFY Go! - gamified English learning app for Bee2 AI, built with TypeScript, serving 500K+ users on AWS Web Applications SPA and SSR: React / Next.js for dynamic single-page apps, Hugo for blazing-fast static sites RESTful and GraphQL APIs: TypeScript backends with Express, Fastify, or NestJS Real-time features: WebSocket-based live updates, collaborative editing, push notifications Responsive design: Mobile-first approach that works on every screen size How I Work Discovery: Requirements gathering, wireframing, tech stack selection Development: Agile sprints with CI/CD and automated testing Delivery: Cloud deployment, monitoring, and ongoing support Technologies Frontend: TypeScript, React, Next.js, Flutter/Dart, TailwindCSS Backend: Node.js, Express, NestJS, REST, GraphQL Mobile: Flutter, React Native (Expo) Testing: Vitest, Jest, Playwright DevOps: Docker, CI/CD via GitHub Actions

Overview I build custom platforms and SaaS products - end-to-end systems with user management, real-time data processing, and automated reporting. From multi-tenant restaurant menu systems (QR Menu SaaS) to automated investment analysis platforms (Musli) with cron-based data collection and daily reporting, I take your idea from concept to deployed product. What I Can Do For You Full-Stack SaaS Products Multi-tenant architecture: Database-per-tenant or shared schemas with row-level isolation Authentication and authorization: JWT, OAuth 2.0, role-based access control (RBAC), session management Subscription management: Stripe/Paddle integration, plan tiers, usage tracking, invoicing Admin dashboards: Tenant management, usage analytics, billing overview, user administration Custom Platforms Data platforms: Automated data collection, processing, analysis, and reporting pipelines API-first design: RESTful or GraphQL APIs designed for consumption by multiple clients (web, mobile, third-party) Static publishing: Generate and deploy static site versions of dynamic data - ideal for customer-facing content from admin interfaces Automated Systems Scheduled data pipelines: Cron-based or event-driven data collection, processing, and report generation Investment/financial tools: Automated portfolio analysis, risk metrics (Sharpe, Sortino, MaxDD), technical indicators (RSI, MACD, Bollinger) Notification systems: Email, Telegram, or messaging platform delivery for reports and alerts How I Build Architecture and stack selection: Monolith first, microservices when necessary Rapid prototyping: Get a working product in your hands fast Production hardening: CI/CD, monitoring, backups, disaster recovery Iterate: Continuous delivery of features based on real usage Technologies Backend: Go (sqlx), TypeScript (NestJS, Express), Python Frontend: React Native (Expo - iOS, Android, Web), React/Next.js Databases: PostgreSQL, MSSQL, SQLite, DynamoDB Infrastructure: AWS, Docker, CI/CD Automation: Cron-based pipelines, schedulers, event-driven triggers Payments: Stripe, Paddle

🔗 Live App TOFY Go!: English Learning at Scale Introduction TOFY Go! is a fun and engaging English learning app designed for learners aged 8 and above. Whether preparing for the TOEFL Young Students Series or simply improving English skills, TOFY Go! makes learning feel like play – with interactive city exploration, badge earning, gamified lessons, and real skill-building aligned to standardized test curricula. As the lead Full Stack Developer at Bee2 AI, I designed and built the entire cloud infrastructure from scratch, managed end-to-end CI/CD pipelines, led a 3-member engineering team, and developed both frontend and backend features alongside AI-powered content delivery systems. ...