Real-Time Balance Monitoring (dRPC)Integrated dRPC to track user balance changes on-chain in real time, ensuring up-to-the-second accuracy for in-app wallets.

Web3 Payments & Staking• Engineered TON and Solana payment gateways for in-game purchases, from transaction generation through status validation.• Connected third-party TON staking APIs to enable users to stake tokens directly within our app.• Developed smart-contract logic for minting, sending, and exchanging custom TON tokens.
Reporting & Analytics AutomationWrote Google Apps Script pipelines that aggregate user and transaction data, generate interactive tables, and render charts via mermaid.js.
Telegram Bot Ecosystem• Task Bot with Leaderboard: photo uploads > admin moderation > dynamic ranking.• Sports Betting Bot: real-time match start and result notifications; accompanying React-based front end.• Filter Moderation Bot: automatic cleanup of broken links/tags and keyword-based bans.• Monitoring & Feedback Bots: forwarded selected user messages and frontend errors to dedicated admin channels.
AI & Voice Services• OpenAI Whisper & GPT: end-to-end voice pipeline—transcribe audio, analyze via GPT, deliver personalized feedback in chat.• Google Cloud Text-to-Speech: seamless TTS integration for richer user interactions.• Custom workflows for pronunciation practice and instant voice-based feedback.
Front-End Development• Betting Platform (React SPA): responsive UI with live data feeds and in-app notifications.• Farming & Card-Builder Game: interactive card slots, spin/staking mechanics, drag-and-drop decks—enhanced with Pixi.js and Framer Motion animations.

• I transferred the project to AWS Lambda resulting in a 23% decrease, in expenses.

• I developed a chat system for users that uses websockets for real time communication.

• I created and configured Telegram bots to monitor differences in cryptocurrency prices across exchanges.

• I wrote Tampermonkey scripts to tasks such as form submissions, NFT purchases and more.

• I have utilized the differences, between blockchains, in cryptocurencies to implement arbitrage aiming to benefit from price variations.

• I actively interacted with known cryptocurrency exchanges such, as Bybit, Binance and Huobi. Additionally I also utilized DeFi platforms, like 1inch, PancakeSwap and Uniswap to engage in trading activities decentralized swaps and access a variety of services within the crypto ecosystem.

• Integrated external APIs such, as Stripe, Novaposhta and a wholesale supplier into the system.

• Developed REST APIs using Nest.js that can be used both internally and externally.

• Utilized RabbitMQ for efficient data exchange among services.

• Implemented Continuous Integration/Continuous Deployment (CI/CD) on the Amazon platform, which resulted in a 53% increase in deployment speed.

• Employed EKS load balancer to ensure system stability and the ability a number of requests (up to 1,000,000 requests per second).

• I created a web application using Node.js for the backend and React, for the frontend.

• I incorporated user authentication features that include registration, login and account management to ensure the security of the application.

• To enhance state management in the React application I utilized the React Query library. This helped me effectively handle data and states, in React by providing data handling and updates.