I have 15+ years of experience in software engineering, specializing in designing and developing high-performance solutions in Cybersecurity, FinTech, Blockchain, E-Commerce, and Marketplaces. I thrive on solving complex challenges, driving technical leadership, and building secure, scalable, and efficient systems. Programming Languages: Golang, JavaScript (Node.js, React.js, TypeScript), Python, Kotlin, C#, .NET, PHP, Perl, C++, SQL, HTML, CSS Databases: RDBMS: MySQL, PostgreSQL, SQLite NoSQL: GCP BigTable, BoltDB, MongoDB, LevelDB, Redis Graph: Neo4j, Cypher Frameworks: Gin Gonic, Echo, NestJS, Express.js, GORM, Symfony, Yii, Laravel, Lumen, Doctrine2, SQLx, Zend Framework, Twig, Smarty Cloud & DevOps: AWS: RDS, EKS, SQS, SNS, EC2, S3, ECS, ECR, Step Functions, Lambda, Terraform GCP: Compute Engine, Kubernetes Engine, Cloud Functions, Cloud Build, Cloud SQL, Storage Microservices & APIs: RabbitMQ, Kafka, GraphQL, gRPC, REST, JSON-RPC CI/CD & Infrastructure: Github Actions, GitLab CI, Jenkins, Travis CI, CircleCI, Docker, Kubernetes Real-Time Systems: Websockets, Socket.IO Blockchain Development: Bitcoin, Ethereum, Hyperledger, Tendermint, BFT, Cosmos SDK Blockchain Integration: EVM & non-EVM chains – Tron, Arbitrum, Optimism, Polygon, Avalanche, Solana. Testing & Automation: Jest, Testify, Mocks, Selenium, PhantomJS, Codeception Search Technologies: Elasticsearch, Sphinx, Blevesearch, Apache Solr, Additional Technologies & Tools: Slack Applications: Channels, Commands, Events Video Streaming: WebRTC, Jitsi, Janus Gateway, EasyRTC Payment Gateways: PayPal, BrainTree, PCI DSS, Stripe, Cardpay, Paymentwall, Unlimint IDE Plugin Development for VS Code and JetBrains IntelliJ IDE Performance & Optimization: Database structure, query optimization (EXPLAIN queries, indexes), caching (Memcached, APC), load balancing (Nginx, PHP7-FPM), performance testing (Apache Benchmark) Software Architecture & Refactoring: Database and code refactoring, high-load web applications Development Methodologies: SCRUM, XP (Extreme Programming), Waterfall, Continuous Integration Solutions & Projects: Blockchain L1: mainnet, testnet, devnet High-Load Systems: Web applications, search engines, data aggregation, mathematical modeling, statistics processing, CRM systems Industry Applications: Search portals (Auto, Agro, Real Estate, Parent Services, Price Comparison, Senior Care), social networks, online libraries, business tools, e-learning platforms, live broadcasts, dating platforms, banking payment terminals, software for hardware and controllers