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SergeevDmitry/README.md

Hi there, I'm Dmitry Sergeev

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About me

With over 15 years of engineering experience, I work on high-load backend infrastructure, custom blockchain protocols, production AI systems, and developer tooling.

My stack spans Python, Go, C++, JavaScript, Solidity, distributed systems, agentic AI, retrieval pipelines, and infrastructure security. I have been building decentralized systems since 2017, with a focus on architecture, reliability, and production constraints.

Experience: Elrond Network, BRD / BREAD, CoinPayments, Scotiabank, Bitdefender, Qiwi

⚡ Projects

Agent Commerce Gateway — Self-hosted, non-custodial infrastructure that turns an existing API into something AI agents can discover, authorize, pay for, and call. MCP, x402, AP2, A2A, and ACP in one execution layer.

Self-Hosted RWA Tokenization Platform — Single-tenant infrastructure for tokenizing real-world assets as permissioned ERC-20s, with auditor-attested supply lifecycle and on-chain cash redemption. Solana implementation →

RepoLore — ChatGPT App — Developer tool for understanding why public GitHub code exists by tracing files and line ranges through commits, pull requests, issues, patches, and regressions.

Immutable Audit — Tamper-evident Linux execution audit trail using eBPF, chained event integrity, and independent verification.

Postflight — Single-file Linux security and health auditing tool with human-readable, JSON, and Prometheus-compatible output plus actionable remediation commands.

llm-kit — Six small, focused npm packages for the unglamorous parts of production LLM engineering. Each package solves one problem, installs independently, and ships with zero or minimal dependencies.

  • mend-json — Turns a truncated JSON stream into a valid partial value on every chunk.
  • token-chunk — Chunks text and Markdown to a token budget along semantic boundaries.
  • chat-fit — Trims chat history to a budget without splitting a tool call from its result.
  • usage-tab — Turns provider usage objects into a reproducible cost breakdown.
  • llm-backoff — Retries that read provider rate-limit headers instead of guessing.
  • vec-cache — SQLite embedding cache with partial batch hits, in-batch deduplication, and model-scoped keys.

🔬 Work & Research

System Architecture — Agent Commerce Gateway — A representative example of how I approach architecture for production systems: defining component and protocol boundaries, converging multiple protocol adapters on a single execution pipeline, separating authorization, payment, backend execution, and receipt storage, and documenting trust boundaries, settlement flow, and failure handling.

ERC-8409 — Signed Service Payment Quotes — ERC proposal I authored for cryptographically signed service payment quotes using EIP-712, designed to separate provider pricing from payer authorization and settlement across agent-commerce flows.

Adversarial Agentic Validation — Research on adversarial validation of autonomous AI agents, focused on failure discovery, boundary testing, and improving reliability in production multi-agent systems.

Pinned Loading

  1. devlab-group/rwa-platform-evm devlab-group/rwa-platform-evm Public

    A self-hosted, single-tenant platform for tokenizing a real-world asset class as a permissioned ERC-20, with an auditor-attested supply lifecycle and on-chain cash redemption.

    Go 35

  2. llm-kit llm-kit Public

    Small, independent TypeScript packages for LLM plumbing — token budgets, streaming JSON repair, cost accounting, retries, embedding caches. No provider SDKs.

    TypeScript 37

  3. devlab-group/immutable-audit devlab-group/immutable-audit Public

    Tamper-evident audit trail for Linux process execution. eBPF captures execve, events are SHA-256 hash-chained, shipped to a separate collector, and independently verifiable by anyone holding the fi…

    C 5

  4. devlab-group/agent-commerce devlab-group/agent-commerce Public

    Self-hosted, non-custodial gateway between the API you already run and the protocols AI agents use to discover, call and pay for it

    TypeScript 27 1