09/25/2026 updated
100 % available
Security-First Infrastructure Engineer | Signing Systems & Stablecoin Payments | Ex-COO
Kiev, Ukraine
Worldwide
M.Sc. Financial and Economic Security, V. N. Karazin Kharkiv National UniversityAbout me
I build security-critical infrastructure hands-on: signing systems where keys never leave an AWS Nitro Enclave, and stablecoin payments. Rust, Python, Postgres, Terraform, AWS, Docker. Before this I was COO of one of Ukraine's largest retailers, 1,160 people. My code is public on GitHub.
AI AgentsGitHub ActionsLLMApplication Programming Interfaces (APIs)Amazon Web ServicesCryptographyLinuxDevOpsE-CommerceInterim ManagementPython (Programming Language)PostgreSQLMachine LearningPublic Key InfrastructureAWS CLI
Security and Custody Architecture
Expertise in TEE and enclave architecture, AWS KMS, remote attestation, reproducible builds, threat modeling, TEE vs MPC trade-offs, and bug bounty research across platforms such as Immunefi, Cantina, Sherlock, and Code4rena.
Backend and Infrastructure Engineering
Proficiency in Rust, TypeScript, Python, PostgreSQL, Docker, Terraform, GitHub Actions, AWS (Nitro Enclaves, KMS, EC2, IAM), and Cloudflare for building and operating production-grade infrastructure.
Payments and Crypto Integration
Hands-on experience with USDC payments (EIP-3009), exchange APIs including Binance, OKX, and Hyperliquid, as well as EVM and Base blockchain environments.
AI Engineering
Experience with Claude Code, MCP servers, and multi-agent workflows with human review gates for AI-driven automation.
Open-Source Signing Infrastructure
Development of Usenami, an open-source signing infrastructure for trading bots and AI agents using Rust, AWS Nitro Enclaves, and KMS, with on-chain enclave measurement registration on Base.
DevOps and CI/CD Practices
Management of 15 GitHub Actions workflows in production covering Rust CI, Terraform checks, dependency audits, and scheduled drift checks. Every third-party action is pinned to a commit SHA; AWS access goes through OIDC with a least-privilege role.
Database Engineering
Experience with PostgreSQL on Supabase with row-level security, including partitioning of a 29 GB market-data table in production.
E-Commerce and Operations Leadership
Ownership of e-commerce P&L, scaling an online channel from under 3% to approximately one third of company revenue (roughly $120M per year), and leading an organization of over 1,000 people across operations, logistics, e-commerce, and procurement.
Procurement and Foreign Trade
Ownership of procurement strategy and supplier portfolio for a major category, including imports, customs management, and FX exposure handling.
Expertise in TEE and enclave architecture, AWS KMS, remote attestation, reproducible builds, threat modeling, TEE vs MPC trade-offs, and bug bounty research across platforms such as Immunefi, Cantina, Sherlock, and Code4rena.
Backend and Infrastructure Engineering
Proficiency in Rust, TypeScript, Python, PostgreSQL, Docker, Terraform, GitHub Actions, AWS (Nitro Enclaves, KMS, EC2, IAM), and Cloudflare for building and operating production-grade infrastructure.
Payments and Crypto Integration
Hands-on experience with USDC payments (EIP-3009), exchange APIs including Binance, OKX, and Hyperliquid, as well as EVM and Base blockchain environments.
AI Engineering
Experience with Claude Code, MCP servers, and multi-agent workflows with human review gates for AI-driven automation.
Open-Source Signing Infrastructure
Development of Usenami, an open-source signing infrastructure for trading bots and AI agents using Rust, AWS Nitro Enclaves, and KMS, with on-chain enclave measurement registration on Base.
DevOps and CI/CD Practices
Management of 15 GitHub Actions workflows in production covering Rust CI, Terraform checks, dependency audits, and scheduled drift checks. Every third-party action is pinned to a commit SHA; AWS access goes through OIDC with a least-privilege role.
Database Engineering
Experience with PostgreSQL on Supabase with row-level security, including partitioning of a 29 GB market-data table in production.
E-Commerce and Operations Leadership
Ownership of e-commerce P&L, scaling an online channel from under 3% to approximately one third of company revenue (roughly $120M per year), and leading an organization of over 1,000 people across operations, logistics, e-commerce, and procurement.
Procurement and Foreign Trade
Ownership of procurement strategy and supplier portfolio for a major category, including imports, customs management, and FX exposure handling.
Experience
Professional experience10+ years
Freelancer since2024
Languages
EnglishFluentRussianNative speakerUkrainianNative speaker
Project history
A pool product built on top of my signing service. The manager trades; the depositor sets the boundary. Before any order is signed, the gateway checks it against the asset list and the caps the depositor accepted, and what the gateway cannot prevent the contract settles afterwards. Built for the Colosseum hackathon, Hyperliquid track, with a public page and open code. Stack: TypeScript, Solidity, Node.js, Hyperliquid API, Cloudflare.
Built Usenami, an open-source signing infrastructure for trading bots and AI agents using Rust, AWS Nitro Enclaves, and KMS. Exchange keys stay inside an AWS Nitro Enclave, every action is checked against policy before a signature is produced, and every decision leaves the enclave as a signed receipt. Signed real orders on Binance, OKX, and Hyperliquid. MCP client and ElizaOS plugin published on npm.
Built a paid data API (x402, USDC on Base) where AI agents pay per request in USDC. Implemented idempotency and reconciliation between payment and delivery. Used Postgres on Supabase with row-level security and partitioned a 29 GB market-data table in production.