Digital payments platform designed for consumers in Canada, offering a se-cure and convenient way to manage personal or business finances through a personal or business wallet.

• Designed and implemented gift card functionality, including issuance, redemption and lifecycle management;
• Developed and integrated payment workflows, enabling payments as a core platform feature;
• Built a user review system integrated with a loyalty program for auto-mated points accrual;
• Integration with a new banking provider, ensuring secure and reliable payment processing;
• Performed refactoring and performance optimizations to improve system maintainability and efficiency;

• Designed, developed, and maintained high-performance cryptocurrency trading bots with integrations across multiple exchanges(Binance, ByBit, BitMart, OKX, WhiteBit, KuCoin, XT, Gate, etc.) and blockchain networks;
• Implemented and optimized market-making and arbitrage strategies with a focus on latency, execution efficiency, and risk management;
• Improved system reliability through performance tuning, memory optimization;
• Extended existing architecture by developing new microservices and expanding platform functionality;

I was involved indeveloping trading functionality from different exchanges:

• Deposit/withdrawal/transfer of funds, history;
• Implementation of creating different types of accounts (investment, trader, manager);
• Trading terminal (charts, opening/closing orders, positions, etc.), ex-tended statistics for each account, trading history;
• Testing coverage, managing a team of 4 developers, implementing a mi-croservice architecture;

• Integration of payment systems (LiqPay, PayPal, Stripe, Fondy, WayForPay);
• Message delivery via mail service and mobile devices AWS SES, SNS;
• Authorization via social networks;
• Collection of detailed statistics on video viewing;
• Video processing via ffmpeg and media converter AWS;
• Admin panel functionality for video moderation and system settings;
• Connection of monitoring systems such as Sentry, NewRelic;
• Data storage on AWS s3;

1. Project Jewel auction.

• Administration panel with adding/removing lots;
• Adding/removing an auction;
• Refactoring;
• Uploading auction results to an Excel file;
• Test coverage, Swagger integration;

2. Accounting system.

• Analysis of the existing system, transition from server-side rendering;
• Adding new functionality to the existing one;
• Filtering, working with documents;
• Role-based system for each user with access rights;