Aleksander Ryazantsev

💬 Profile

Frontend-oriented fullstack developer with strong expertise in React, React Native, and TypeScript. I build performant cross-platform apps and admin panels, automate business processes, and handle full product cycles — from mockups to CI/CD and deployment. Experience includes backend development with NestJS and PostgreSQL, DevOps tasks, and leading a small dev team. Open to remote roles and relocation.

🧰 Core Stack

Frontend / Mobile: React, React Native, Expo, TypeScript, MobX, Vite, SCSS, HTML5, GraphQL, REST, SVG, Skia, Reanimated
Backend: Node.js, NestJS, Express, PostgreSQL, TypeORM, Prisma, JWT, Telegram Bot API
Infrastructure: GitHub Actions, PM2, NGINX, DigitalOcean, SSH, VPS setup
Automation: Google Sheets API, docx, excel4node, MJML, CSV/JSON CLI tools
Other: Git Flow, Code Review, EAS Build, Sentry, ESLint, Prettier, AI-enhanced workflows (ChatGPT, Copilot)

🛠️ Key Skills

📱 Mobile Development

React Native, Expo, EAS Build (local and cloud builds, multi-brand architecture)
UI optimization and platform-specific adaptation for iOS and Android
Integration of device features: push notifications, geolocation, camera, in-app browser (WebView)
State management with MobX (structured architecture, decorators)
Interface localization (i18n), offline data storage via MMKV
Error monitoring using Sentry
App release preparation for App Store and Google Play

🖥 Frontend / Web

React, TypeScript, Vite, HTML5, SCSS, CSS Modules
SPA and PWA development, SVG animations
Responsive layout, cross-browser compatibility, SEO optimization
GraphQL Code Generator for typed queries
Custom UI using Skia, Reanimated, and Redash
Landing pages and websites using HTML, SCSS, React, WordPress

🔧 Backend Development

REST/GraphQL APIs using NestJS / Express
Auth (JWT), secure endpoints, API rate limiting
Database schemas, migrations with PostgreSQL, MySQL
ORM: TypeORM, Prisma
Basic production setups: personal finance tracking system, delivery CRM

🛠 DevOps & Automation

GitHub Actions for CI/CD pipelines
VPS setup with NGINX, PM2, manual deployment
Word document generation using `docx` — contracts, templates, reports
Excel report generation using `excel4node` — analytics, statistics, calculated values, currencies
Responsive email templates using MJML + Node.js
CLI tools in TypeScript/Node.js — modular task-based architecture
Google Sheets API integration, CSV ↔ JSON data conversion
AI-assisted tooling: code generation, test scaffolding, docs

🤝 Team Leadership

Led a team of 3 devs: task planning, tech guidance, code review
Worked closely with designers and product owners
Suggested architecture improvements and enforced UI consistency
Participated in hiring and onboarding

📦 Projects

ItCharge App

React Native + Expo

Multi-brand architecture with custom build profiles, ~140,000 users
GraphQL API integration with typed queries via Codegen
Support for push notifications, geolocation, offline data (MMKV)
GitHub Actions for CI/CD, Sentry for error monitoring

ItCharge Admin Panel

Admin interface built with React + MobX + TypeScript. Focused on scalable state architecture and dynamic UI patterns.

ItCharge Marketing Website

Public website built with Next.js and styled-components. Optimized for performance, responsiveness, and accessibility.

Custom CRM Tool

Fullstack TypeScript app for order tracking and customer payments
Node.js backend (NestJS + PostgreSQL), Telegram bot integration
Self-hosted on VPS, basic UI in React + Tailwind

Automation Suite

Node.js CLI tools for generating contracts (docx), reports (xlsx), emails (MJML)
Integrated with Google Sheets, export pipelines (CSV↔JSON)

🎓 Education

College of Service, Russian State University of Tourism and Service
Automated Information Processing and Control Systems (Industry-specific)
2006–2009

🗣 Languages

Russian – native
English – professional working proficiency