makar

Led team of 8 developers: task assignment (Jira), deadline tracking, code reviews (GitLab), role distribution, mentoring. Provided technical leadership: system architecture design, technology selection, risk assessment, key decisions. Managed CI/CD pipelines (GitLab), performance monitoring, and product metrics (Grafana). Integrated blockchain protocols (ERC-4337 account abstraction, cross-chain bridges, DeFi primitives, smart contract interactions); optimized RPC queries and data aggregation. Developed antifraud and security mechanisms against Sybil attacks, wallet drainers, and Web3 threats; monitored suspicious on-chain activity. Key Achievements: Launched virtual payment card integration service into crypto wallet: processed 1,000+ transactions/month with $250,000 monthly turnover; integrated multiple Visa/Mastercard providers with automated top-ups and settlements. Built non-custodial crypto wallet as Telegram Mini App: implemented ERC-4337 standards; integrated cross-chain swaps (DeBridge, Jupiter); aggregated DEX data with caching and real-time updates. Designed antifraud system for multi-account detection: compiled database of 20M+ addresses; audited 30+ projects across Bitcoin, Ethereum, BNB Chain, TRON, TON; identified 15,000+ fraudulent address clusters using custom blockchain-specific classification algorithms. Tech Stack: Python, PostgreSQL, SQLAlchemy, FastAPI, Kafka, Redis, GitLab CI/CD, Kubernetes, RPC nodes.

Led development of Python web services and integrations; designed architectures, data models, and processing workflows. Gathered business requirements, prepared technical specs, work plans, and budgets. Managed team: task prioritization, resource allocation; conducted 25+ technical interviews (Backend/Frontend); refined hiring processes (GitHub reviews, coding tests, refactoring); created onboarding materials. Implemented Trello for task tracking and project management. Key Achievements: Deployed data collection and monitoring systems: processed 5,000+ records/day. Developed backend for VPN application: supported 1,000+ daily active users; managed 20+ servers across regions. Built Solana DEX trading backend: integrated Jito bundles and Nextblock RPC. Implemented FNS receipt verification service: validated 10,000+ receipts with item parsing.

Prepared proposals, technical specifications, and documentation (GOST standards) for information security systems. Conducted security audits, vulnerability assessments (OWASP Top 10), and exploit demonstrations for web applications. Designed and implemented comprehensive protection systems (PDn, KII) for government and insurance sectors, including IDM (Avanport) and WAF (PTAF, Imperva). Integrated SIEM (MP SIEM, KUMA), WAF, DDoS protection, Redcheck; automated processes with Python and JS scripts.

Conducted presales, pilots, audits, and vulnerability analysis (Burp Suite, NMAP, Metasploit); investigated security incidents. Designed protection systems for critical infrastructure (energy, finance, government). Integrated SIEM (MP SIEM, Splunk, ArcSight), vulnerability scanners (Nessus, Redcheck).