Dmitrii S.

I am a Senior IT Engineer with 15+ years of experience specializing in high-load backend architecture, custom blockchain development, and production-grade Enterprise AI systems. Having designed systems from scratch in Rust, Go, C++, Solidity, and Python, I bring a rare combination of deep low-level engineering, decentralized protocols, and cutting-edge Agentic AI. AI & Agentic Systems I design, implement, and scale production-ready Generative AI solutions for enterprise clients. My focus is on moving beyond simple API wrappers to building autonomous multi-agent systems, advanced retrieval pipelines, and secure LLM infrastructures. Core AI Expertise: Agentic AI & Multi-Agent Orchestration: Building self-correcting, autonomous workflows and task-execution graphs using LangGraph, CrewAI, Semantic Kernel (for enterprise C#/.NET/Python ecosystems), and AutoGen. Advanced RAG & Context Engineering: Implementing state-of-the-art retrieval architectures—GraphRAG, Corrective RAG (CRAG), and Agentic RAG—using vector databases (Pinecone, ChromaDB, Milvus, Qdrant) and tools like LlamaIndex or LangChain. Enterprise Platforms & APIs: Designing with AWS Bedrock (AgentCore), Google Vertex AI (Agent Builder), and frontier model APIs (OpenAI GPT-5/o-series with Responses API, Anthropic Claude 3.5/4, and open-weights like Llama 4 & Mistral Large). LLMOps & Evaluation/Observability: Implementing production-grade tracing, security guardrails, and cost monitoring using LangSmith, Langfuse, Phoenix, and Arize. Data Pipelines for AI: Automating unstructured data parsing and ingestion at scale using Firecrawl and LlamaParse. Web3 & Core Engineering I build highly secure, resilient, and performant decentralized systems. My track record includes core engineering roles in tier-1 Web3 projects: - Elrond (EGLD): Launched IEO and co-developed the state sharding system. - Bread Wallet (BRD): Audited and built robust payment gateways. - CoinPayments: Engineered high-security cold/hot cryptocurrency storage and gateways. Key Web3 & Backend Skills: Languages & Core: Rust, Go, C++, Solidity, JavaScript/Node.js, WebAssembly (Wasm). Blockchain & DeFi: Custom L1/L2 Protocols, EVM, Smart Contract Audits (OpenZeppelin, Foundry, Hardhat), Cross-chain Bridges, DEX/CEX architecture, Trading & Arbitrage/MEV bots. Databases & Storage: PostgreSQL, LevelDB, RocksDB, Redis. DevOps & Infrastructure: AWS (Serverless, ECS, EKS, RDS), Terraform, Docker, Kubernetes, CI/CD (Jenkins, GitHub Actions).